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lazarus/lcl/interfaces/win32/win32winapi.inc
micha 87292a147f fix line ending: DIBs are dword, but CreateBitmap wants word-aligned 
git-svn-id: trunk@7557 -
2005-08-23 13:30:17 +00:00

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{%MainUnit win32int.pp}
{ $Id$ }
{******************************************************************************
All Windows API implementations.
Initial Revision : Sat Nov 13 12:53:53 1999
!! Keep alphabetical !!
Support routines go to win32proc.pp
******************************************************************************
Implementation
******************************************************************************
*****************************************************************************
* *
* This file is part of the Lazarus Component Library (LCL) *
* *
* See the file COPYING.LCL, included in this distribution, *
* for details about the copyright. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* *
*****************************************************************************
}
{$IFOPT C-}
// Uncomment for local trace
// {$C+}
// {$DEFINE ASSERT_IS_ON}
{$ENDIF}
Const
BOOL_TEXT: Array[Boolean] Of String = ('False', 'True');
//##apiwiz##sps## // Do not remove
{------------------------------------------------------------------------------
Method: Arc
Params: DC - handle to device context
X - x-coordinate of bounding rectangle's upper-left corner
Y - y-coordinate of bounding rectangle's upper-left corner
Width - Width of the rectangle
Height - height of the rectangle
Angle1 - first angle
Angle2 - second angle
Returns: Whether the call was successful
Use Arc to draw an elliptically curved line with the current Pen.
The angles angle1 and angle2 are 1/16th of a degree. For example, a full
circle equals 5760 (16*360). Positive values of Angle and AngleLength mean
counter-clockwise while negative values mean clockwise direction.
Zero degrees is at the 3'o clock position.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.Arc(DC: HDC; Left,Top, Width, Height, Angle1, Angle2: Integer): Boolean;
var
SX, SY, EX, EY : Longint;
Begin
Angles2Coords(Left,Top, Width, Height, Angle1, Angle2, SX, SY, EX, EY);
Result := Boolean(Windows.Arc(DC, Left,Top, Left+Width, Top+Height, SX, SY, EX, EY));
End;
{------------------------------------------------------------------------------
Method: AngleChord
Params: DC,x,y,width,height,angle1,angle2
Returns: Nothing
Use AngleChord to draw a filled Chord-shape on the canvas. The angles angle1
and angle2 are 1/16th of a degree. For example, a full circle equals 5760
16*360). Positive values of Angle and AngleLength mean counter-clockwise while
negative values mean clockwise direction. Zero degrees is at the 3'o clock
position.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.AngleChord(DC: HDC; X, Y, Width, Height, Angle1,
Angle2: Integer): Boolean;
var
SX, SY, EX, EY : Longint;
Begin
Angles2Coords(X,Y,Width,Height,Angle1,Angle2, SX, SY, EX, EY);
Result := Boolean(Windows.Chord(DC, X, Y, X+Width, Y+Height, SX, SY, EX, EY));
End;
{------------------------------------------------------------------------------
Method: BitBlt
Params: DestDC - The destination device context
X, Y - The left/top corner of the destination rectangle
Width, Height - The size of the destination rectangle
SrcDC - The source devicecontext
XSrc, YSrc - The left/top corner of the source rectangle
Rop - The raster operation to be performed
Returns: True if succesful
The BitBlt function copies a bitmap from a source context into a destination
context using the specified raster operation.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.BitBlt(DestDC: HDC; X, Y, Width, Height: Integer; SrcDC: HDC; XSrc, YSrc: Integer; Rop: DWORD): Boolean;
Begin
Result := Boolean(Windows.BitBlt(DestDC, X, Y, Width, Height, SrcDC, XSrc, YSrc, Rop));
End;
{------------------------------------------------------------------------------
Method: BeginPaint
Params: Handle - Handle to window to begin painting in
PS - PAINTSTRUCT variable that will receive painting information.
Returns: A device context for the specified window if succesful otherwise nil
The BeginPaint function prepares the specified window for painting and fills
a PAINTSTRUCT structure with information about the painting.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.BeginPaint(Handle: HWND; var PS: TPaintStruct): HDC;
Begin
Result := Windows.BeginPaint(Handle, @PS);
End;
{------------------------------------------------------------------------------
Method: BringWindowToTop
Params: HWnd - The handle of the window
Returns: True if succesful
The BringWindowToTop function brings the specified window to top (highest z-
index level).
------------------------------------------------------------------------------}
Function TWin32WidgetSet.BringWindowToTop(HWnd: HWND): Boolean;
Begin
Assert(False, 'Trace:TWin32WidgetSet.BringWindowToTop - Start');
Result := Boolean(Windows.BringWindowToTop(HWnd));
Assert(False, 'Trace:TWin32WidgetSet.BringWindowToTop - Exit');
End;
{------------------------------------------------------------------------------
Method: CallDefaultWndHandler
Params: Sender - object, that sent the message
Message - a TLMessage
Returns: -
Called by TWinControl.DefaultHandler to let the interface call some default
functions for the message.
------------------------------------------------------------------------------}
Procedure TWin32WidgetSet.CallDefaultWndHandler(Sender: TObject; var Message);
var
Handle: HWND;
procedure CallWin32PaintHandler;
var
ClientBoundRect: TRect;
PaintMsg: TLMPaint absolute Message;
begin
// the LCL creates paint messages, with a DC origin set to the client
// origin of the emitting control. The paint handler of win32 expects the
// DC origin at the origin of the control.
// -> move the windoworigin
ClientBoundRect:=Rect(0,0,0,0);
if Sender is TWinControl then
if not GetClientBounds(Handle,ClientBoundRect) then exit;
MoveWindowOrgEx(PaintMsg.DC,-ClientBoundRect.Left,-ClientBoundRect.Top);
try
// call win32 paint handler
CallDefaultWindowProc(Handle, WM_PAINT, PaintMsg.DC, 0);
finally
// restore DC origin
MoveWindowOrgEx(PaintMsg.DC, ClientBoundRect.Left, ClientBoundRect.Top);
end;
end;
procedure CallMouseWheelHandler;
var
ScrollInfo: Windows.tagScrollInfo;
WParam: Windows.WParam;
ScrollMsg, ScrollBar: dword;
begin
if not TWinControl(Sender).HandleAllocated then
exit;
// send scroll message
FillChar(ScrollInfo, sizeof(ScrollInfo), #0);
ScrollInfo.cbSize := sizeof(ScrollInfo);
ScrollInfo.fMask := SIF_PAGE or SIF_POS or SIF_RANGE;
// if mouse is over horizontal scrollbar, scroll horizontally
WParam := (TLMMouseEvent(Message).X and $FFFF) or ((TLMMouseEvent(Message).Y and $FFFF) shl 16);
if Windows.SendMessage(Handle, WM_NCHITTEST, 0, WParam) = HTHSCROLL then
begin
ScrollBar := SB_HORZ;
ScrollMsg := WM_HSCROLL;
end else begin
ScrollBar := SB_VERT;
ScrollMsg := WM_VSCROLL;
end;
if Windows.GetScrollInfo(Handle, ScrollBar, ScrollInfo) then
begin
with TLMMouseEvent(Message) do
begin
WParam := Windows.WParam(ScrollInfo.nPos - (WheelDelta * Integer(ScrollInfo.nPage) * 4) div (120 * 10));
if WParam > ScrollInfo.nMax - integer(ScrollInfo.nPage) + 1 then
WParam := ScrollInfo.nMax - integer(ScrollInfo.nPage) + 1;
if WParam < ScrollInfo.nMin then
WParam := ScrollInfo.nMin;
WParam := SB_THUMBPOSITION or (WParam shl 16);
end;
Windows.PostMessage(Handle, ScrollMsg, WParam, HWND(nil));
end;
end;
procedure DrawCheckListBoxItem(CheckListBox: TCheckListBox; Data: PDrawItemStruct);
var
Selected: Boolean;
lgBrush: LOGBRUSH;
Brush: HBRUSH;
Rect: Windows.Rect;
Flags: Cardinal;
OldColor: COLORREF;
OldBackColor: COLORREF;
begin
Selected := (Data^.itemState AND ODS_SELECTED)>0;
// fill the background
if Selected then
lgBrush.lbColor := Windows.GetSysColor(COLOR_HIGHLIGHT)
else
lgBrush.lbColor := Windows.GetSysColor(COLOR_WINDOW);
lgBrush.lbStyle := BS_SOLID;
Brush := CreateBrushIndirect(lgBrush);
Windows.FillRect(Data^._HDC, Windows.Rect(Data^.rcItem), Brush);
DeleteObject(Brush);
// draw checkbox
Flags := DFCS_BUTTONCHECK;
if CheckListBox.Checked[Data^.ItemID] then
Flags := Flags or DFCS_CHECKED;
Rect.Left := Data^.rcItem.Left + 2;
Rect.Top := Data^.rcItem.Top + 2;
Rect.Bottom := Data^.rcItem.Bottom - 2;
Rect.Right := Rect.Left + Rect.Bottom - Rect.Top;
Windows.DrawFrameControl(Data^._HDC, Rect, DFC_BUTTON, Flags);
// draw text
Rect := Windows.Rect(Data^.rcItem);
Rect.Right := Data^.rcItem.Right;
Rect.Left := Rect.Bottom-Rect.Top + 5;
if Selected then begin
OldColor := Windows.SetTextColor(Data^._HDC, Windows.GetSysColor(COLOR_HIGHLIGHTTEXT));
OldBackColor := Windows.SetBkColor(Data^._HDC, Windows.GetSysColor(COLOR_HIGHLIGHT));
end;
Windows.DrawText(Data^._HDC, PChar(CheckListBox.Items[Data^.ItemID]), -1,
Rect, DT_SINGLELINE or DT_VCENTER or DT_NOPREFIX);
if Selected then begin
Windows.SetTextColor(Data^._HDC, OldColor);
Windows.SetBkColor(Data^._HDC, OldBackColor);
end;
end;
begin
Handle := ObjectToHwnd(Sender);
case TLMessage(Message).Msg of
LM_PAINT:
CallWin32PaintHandler;
LM_DRAWITEM:
begin
with TLMDrawItems(Message) do
begin
if Sender is TCheckListBox then
begin
// ItemID not UINT(-1)
if DrawItemStruct^.ItemID <> DWORD($FFFFFFFF) then
DrawCheckListBoxItem(TCheckListBox(Sender), DrawItemStruct);
end;
end;
end;
LM_MEASUREITEM:
begin
with TLMMeasureItem(Message).MeasureItemStruct^ do
begin
if Sender is TCustomListBox then
begin
itemHeight := TCustomListBox(Sender).ItemHeight;
if TCustomListBox(Sender).Style = lbOwnerDrawVariable then
TCustomListBox(Sender).MeasureItem(itemID, integer(itemHeight));
end;
end;
end;
LM_MOUSEWHEEL:
begin
// provide default wheel scrolling functionality
CallMouseWheelHandler;
end;
LM_GETDLGCODE:
begin
TLMessage(Message).Result := CallDefaultWindowProc(Handle, WM_GETDLGCODE, 0, 0);
end;
end;
end;
{------------------------------------------------------------------------------
Method: CallNextHookEx
Params: HHk - handle of the current hook
NCode - Hook code
WParam - Word parameter
LParam - Long-integer parameter
Returns: The handle of the next hook procedure
Calls the next procedure in the hook chain
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CallNextHookEx(HHk: HHOOK; NCode: Integer; WParam: WParam; LParam: LParam): Integer;
Begin
Result := Windows.CallNextHookEx(hhk, ncode, Windows.WPARAM(wParam), Windows.LPARAM(lParam));
End;
{------------------------------------------------------------------------------
Method: CallWindowProc
Params: LPPrevWndFunc - Address of specified window procedure
Handle - Handle of window receiving messages
Msg - The message sent
WParam - Word parameter
LParam - Long-integer parameter
Returns: Message result
Passes message information to the specified window procedure
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CallWindowProc(LPPrevWndFunc: TFarProc; Handle: HWND;
Msg: UINT; WParam: WParam; LParam: LParam): Integer;
Begin
Result := Windows.CallWindowProc(WNDPROC(LPPrevWndFunc), Handle, Msg, Windows.WPARAM(WParam), Windows.LPARAM(LParam));
End;
{------------------------------------------------------------------------------
Method: ClientToScreen
Params: Handle - Handle of window
P - container that contains coordinates
Returns: Whether the call was successful
Converts client coordinates to screen coordinates
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ClientToScreen(Handle: HWND; Var P: TPoint): Boolean;
var
ORect: TRect;
Begin
Result := Boolean(Windows.ClientToScreen(Handle, @P));
if not Result then exit;
Result := GetLCLClientBoundsOffset(Handle, ORect);
if not Result then exit;
inc(P.X, ORect.Left);
inc(P.Y, ORect.Top);
End;
{------------------------------------------------------------------------------
Method: ClipboardFormatToMimeType
Params: FormatID - a registered format identifier (0 is invalid)
Returns: the corresponding mime type as string
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ClipboardFormatToMimeType(FormatID: TClipboardFormat): String;
Begin
Assert(False, 'Trace:TWin32WidgetSet.ClipboardFormatToMimeType - Start');
Windows.GetClipboardFormatName(FormatID, @Result, MAX_PATH);
Assert(False, 'Trace:TWin32WidgetSet.ClipboardFormatToMimeType - Exit');
End;
{------------------------------------------------------------------------------
Method: ClipboardGetData
Params: ClipboardType - clipboard type
FormatID - a registered format identifier (0 is invalid)
Stream - If format is available, it will be appended to this
stream
Returns: true on success
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ClipboardGetData(ClipboardType: TClipboardType;
FormatID: TClipboardFormat; Stream: TStream): Boolean;
var
DataHandle: HGLOBAL;
Data: pointer;
Size: integer;
Begin
Assert(False, 'TWin32WidgetSet.ClipboardGetData - Start');
Result := false;
if (FormatID=0) or (Stream=nil) or
not Windows.IsClipboardFormatAvailable(FormatID) then exit;
if Windows.OpenClipboard(Windows.HWND(nil)) then
try
DataHandle := Windows.GetClipboardData(FormatID);
if DataHandle<>HWND(0) then begin
Size := Windows.GlobalSize(DataHandle);
if Size>0 then begin
Data := Windows.GlobalLock(DataHandle);
try
Stream.Write(Data^, Size);
finally
Windows.GlobalUnlock(DataHandle);
end;
Result := true;
end;
end;
finally
Windows.CloseClipboard;
end;
Assert(False, 'TWin32WidgetSet.ClipboardGetData - Exit');
End;
{------------------------------------------------------------------------------
Method: ClipboardGetFormats
Params: ClipboardType - the type of clipboard operation (GTK only; ignored here)
Count - the number of clipboard formats
List - Pointer to an array of supported formats
(you must free it yourself)
Returns: true on success
------------------------------------------------------------------------------}
function TWin32WidgetSet.ClipboardGetFormats(ClipboardType: TClipboardType;
var Count: Integer; var List: PClipboardFormat): Boolean;
var
FormatID: UINT;
c: integer;
Begin
Result := false;
List := nil;
Count := CountClipboardFormats;
GetMem(List, Count * SizeOf(TClipboardFormat));
Windows.OpenClipboard(HWND(AppHandle));
try
c := 0;
FormatID := 0;
repeat
FormatID := EnumClipboardFormats(FormatID);
if (FormatID<>0) then begin
List[c] := FormatID;
inc(c);
end;
until (c>=Count) or (FormatID=0);
Count := c;
finally
Windows.CloseClipboard;
end;
Result := true;
End;
{------------------------------------------------------------------------------
Method: ClipboardGetOwnerShip
Params: ClipboardType - Type of clipboard, the win32 interface only handles
ctClipBoard
OnRequestProc - TClipboardRequestEvent is defined in LCLType.pp
If OnRequestProc is nil the onwership will end.
FormatCount - number of formats
Formats - array of TClipboardFormat. The supported formats the owner
provides.
Returns: true on success
Sets the supported formats and requests ownership for the clipboard.
The OnRequestProc is used to get the data from the LCL and to put it on the
clipboard.
If someone else requests the ownership, the OnRequestProc will be executed
with the invalid FormatID 0 to notify the old owner of the lost of ownership.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ClipboardGetOwnerShip(ClipboardType: TClipboardType;
OnRequestProc: TClipboardRequestEvent; FormatCount: Integer;
Formats: PClipboardFormat): Boolean;
Var
I: Integer;
procedure PutTextOnClipBoard;
var
MemStream : TMemoryStream;
TextLength : Integer;
DataHandle : Windows.HGLOBAL;
TextData : PChar;
begin
MemStream := TMemoryStream.Create();
try
OnRequestProc(Windows.CF_TEXT, MemStream);
MemStream.Position:=0;
TextLength := Integer(MemStream.Size);
DataHandle := Windows.GlobalAlloc(Windows.GMEM_MOVEABLE, TextLength+1);
if (DataHandle=HWND(0)) then begin
Result := false;
exit;
end;
TextData := PChar(GlobalLock(DataHandle));
try
MemStream.Read(TextData[0], TextLength);
TextData[TextLength] := #0;
finally
GlobalUnlock(DataHandle);
end;
// Put it on the clipboard as CF_TEXT
Windows.SetClipboardData(Windows.CF_TEXT, DataHandle);
finally
MemStream.Free;
end;
end;
Begin
Result := false;
if ClipboardType<>ctClipBoard then begin
{ the win32 interface does not support this kind of clipboard,
so the application can have the ownership at any time.
The TClipboard in clipbrd.pp has an internal cache system, so that an
application can use all types of clipboards even if the underlying
platform does not support it.
Of course this will only be a local clipboard, invisible to other
applications. }
Result := true;
exit;
end;
if (FormatCount=0) or (OnRequestProc=nil) then begin
{ The LCL indicates is doesn't have the clipboard data anymore
and the interface can't use the OnRequestProc anymore.}
OnClipBoardRequest := nil;
Result := true;
end else begin
{ clear OnClipBoardRequest to prevent destroying the LCL clipboard,
when emptying the clipboard}
OnClipBoardRequest := nil;
if not Windows.OpenClipboard(FAppHandle) then exit;
try
if not Windows.EmptyClipboard then exit;
// if we got here, assume everything goes OK.
Result := true;
for I := 0 To FormatCount-1 do begin
if Formats[i]=Windows.CF_TEXT then PutTextOnClipBoard;
end;
OnClipBoardRequest := OnRequestProc;
finally
Windows.CloseClipboard;
end;
end;
End;
{------------------------------------------------------------------------------
Method: ClipboardRegisterFormat
Params: AMimeType - a string (usually a MIME type) identifying a new format
type to register
Returns: the registered Format identifier (TClipboardFormat)
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ClipboardRegisterFormat(Const AMimeType: String): TClipboardFormat;
Begin
if AMimeType=PredefinedClipboardMimeTypes[pcfText] then
Result := Windows.CF_TEXT
else
Result := Windows.RegisterClipboardFormat(PChar(AMimeType));
End;
{------------------------------------------------------------------------------
Function: CombineRgn
Params: Dest, Src1, Src2, fnCombineMode
Returns: longint
Combine the 2 Source Regions into the Destination Region using the specified
Combine Mode. The Destination must already be initialized. The Return value
is the Destination's Region type, or ERROR.
The Combine Mode can be one of the following:
RGN_AND : Gets a region of all points which are in both source regions
RGN_COPY : Gets an exact copy of the first source region
RGN_DIFF : Gets a region of all points which are in the first source
region but not in the second.(Source1 - Source2)
RGN_OR : Gets a region of all points which are in either the first
source region or in the second.(Source1 + Source2)
RGN_XOR : Gets all points which are in either the first Source Region
or in the second, but not in both.
The result can be one of the following constants
Error
NullRegion
SimpleRegion
ComplexRegion
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CombineRgn(Dest, Src1, Src2 : HRGN; fnCombineMode : Longint) : Longint;
begin
Result := Windows.CombineRgn(Dest, Src1, Src2, fnCombineMode);
end;
{------------------------------------------------------------------------------
Method: CreateBitmap
Params: Width - bitmap width, in pixels
Height - bitmap height, in pixels
Planes - number of color planes
BitCount - number of bits required to identify a color
BitmapBits - pointer to array containing color data
Returns: A handle to a bitmap
The CreateBitmap function creates a bitmap with the specified width, height,
and color format (color planes and bits per pixel).
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CreateBitmap(Width, Height: Integer; Planes, BitCount: LongInt; BitmapBits: Pointer): HBITMAP;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.CreateBitmap] Width: %d, Height: %d, Planes: %d, BitCount: %d, BitmapBits: 0x%x', [Width, Height, Planes, BitCount, Longint(BitmapBits)]));
Result := Windows.CreateBitmap(Width, Height, Planes, BitCount, BitmapBits);
Assert(False, Format('Trace:< [TWin32WidgetSet.CreateBitmap] --> 0x%x', [Integer(Result)]));
End;
{------------------------------------------------------------------------------
Method: CreateBrushIndirect
Params: LogBrush - record describing brush
Returns: identifier of a logical brush
The CreateBrushIndirect function creates a logical brush that has the
specified style, color, and pattern.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CreateBrushIndirect(Const LogBrush: TLogBrush): HBRUSH;
Var
LB: Windows.LogBrush;
Begin
LB.lbStyle := LogBrush.lbStyle;
LB.lbColor := Windows.COLORREF(ColorToRGB(LogBrush.lbColor));
LB.lbHatch := LogBrush.lbHatch;
Assert(False, Format('Trace:> [TWin32WidgetSet.CreateBrushIndirect] Style: %d, Color: %8x', [lb.lbStyle, lb.lbColor]));
Result := Windows.CreateBrushIndirect(LB);
Assert(False, Format('Trace:< [TWin32WidgetSet.CreateBrushIndirect] Got --> %x', [Result]));
End;
{------------------------------------------------------------------------------
Method: CreateCaret
Params: Handle - handle to owner window
Bitmap - handle to bitmap for caret shape
Width - caret width
Height - caret height
Returns: Whether the function succeeded
Creates a new shape for the system caret and assigns ownership of the caret
to the specified window
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CreateCaret(Handle: HWND; Bitmap: HBITMAP; Width, Height: Integer): Boolean;
Begin
Result := Boolean(Windows.CreateCaret(Handle, Bitmap, Width, Height));
Assert(False, 'Trace:TODO: [TWin32WidgetSet.CreateCaret] Finish');
End;
{------------------------------------------------------------------------------
Method: CreateCompatibleBitmap
Params: DC - handle to device context
Width - width of bitmap, in pixels
Height - height of bitmap, in pixels
Returns: a handle to the bitmap
Creates a bitmap compatible with the specified device context.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CreateCompatibleBitmap(DC: HDC; Width, Height: Integer): HBITMAP;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.CreateCompatibleBitmap] DC: 0x%x, W: %d, H: %d', [DC, Width, Height]));
Result := Windows.CreateCompatibleBitmap(DC, Width, Height);
Assert(False, Format('Trace:< [TWin32WidgetSet.CreateCompatibleBitmap] DC: 0x%x --> 0x%x', [DC, Result]));
End;
{------------------------------------------------------------------------------
Method: CreateCompatibleDC
Params: DC - handle to memory device context
Returns: handle to a memory device context
Creates a memory device context (DC) compatible with the specified device.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CreateCompatibleDC(DC: HDC): HDC;
Begin
Result := Windows.CreateCompatibleDC(DC);
Assert(False, Format('Trace:[TWin32WidgetSet.CreateCompatibleDC] DC: 0x%x --> 0x%x', [Integer(DC), Integer(Result)]));
End;
{------------------------------------------------------------------------------
Method: CreateFontIndirect
Params: LogFont - logical font record
Returns: a handle to a logical font
Creates a logical font that has the characteristics specified in the
specified record.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CreateFontIndirect(Const LogFont: TLogFont): HFONT;
Var
TempLogFont: TLogFont;
Begin
TempLogFont := LogFont;
if String(TempLogFont.lfFaceName) = DefFontData.Name then
begin
Move(FMetrics.lfMessageFont.lfFaceName, TempLogFont.lfFaceName, LF_FACESIZE);
if TempLogFont.lfHeight = 0 then
TempLogFont.lfHeight := FMetrics.lfMessageFont.lfHeight;
end;
Result := Windows.CreateFontIndirect(@TempLogFont);
End;
{------------------------------------------------------------------------------
Method: CreatePenIndirect
Params: LogPen - record that defines the style, width, and color of a pen
Returns: a handle that identifies a logical cosmetic pen
Creates a logical cosmetic pen that has the style, width, and color specified
in a record.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CreatePenIndirect(Const LogPen: TLogPen): HPEN;
Var
LP: TLogPen;
Begin
LP := LogPen;
Lp.lopnColor := Windows.COLORREF(ColorToRGB(Lp.lopnColor));
Assert(False, 'Trace:[TWin32WidgetSet.CreatePenIndirect]');
Result := Windows.CreatePenIndirect(Windows.LOGPEN(LP));
End;
{------------------------------------------------------------------------------
Method: CreatePixmapIndirect
Params: Data - Raw pixmap data
TransColor - Color of transparent spots
Returns: Handle to LCL bitmap
Creates a bitmap from raw pixmap data.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CreatePixmapIndirect(Const Data: Pointer; Const TransColor: LongInt): HBITMAP;
Type
PColorMap = ^TColorMap;
TColorMap = Record
Alias: String;
Color: DWORD;
End;
PPixmapArray = ^TPixmapArray;
TPixmapArray = Array[0..1000] Of PChar;
Var
AliasLen : Cardinal;
AList : TList;
ColorCount : Cardinal;
hdcScreen : HDC;
hdcBitmap : HDC;
hbmBitmap : HBITMAP ;
Height, Width : Integer;
OldObject : HGDIOBJ;
PixmapArray : PPixmapArray;
Info : String;
PixmapInfo : TStringList;
Procedure NormalizeString(Var Str: String);
Var
S: String;
Const
keyTab = #9;
Begin
Assert(False, 'Trace:NormalizeString - Start');
Str := Replace(Str, keyTab, ' ', True);
S := '';
While True Do Begin
Str := Replace(Str, ' ', ' ', True);
If Str = S Then Break;
S := Str;
End;
Assert(False, 'Trace:NormalizeString - Exit');
End;
Function StrToInt(Const Str: String): DWORD;
Var
S: String;
Begin
Assert(False, 'Trace:StrToInt - Start');
S := Trim(Str);
Result := SysUtils.StrToInt(S);
Assert(False, 'Trace:StrToInt - Exit');
End;
procedure CreateColorMap;
Var
Elem: String;
I, Idx: Integer;
ColorMap: PColorMap;
Begin
Assert(False, 'Trace:CreateColorMap - Start');
If ColorCount = 0 Then Begin
Assert(False, 'Trace:CreateColorMap - Color count was not retrieved; can''t create color map');
AList := Nil;
Exit;
End;
AList := TList.Create;
For I := 1 To ColorCount Do Begin
Try
Elem := String(PixmapArray^[I]);
While Pos(Elem[Length(Elem)],'",')>0 do Elem:=Copy(Elem,1,Length(Elem)-1);
Idx := Cardinal(Pos(Elem, '"'))+AliasLen+4;
New(ColorMap);
ColorMap^.Alias := Copy(Elem, 1, AliasLen);
If Copy(Elem, idx, 1) = '#' Then begin
//ColorMap^.Color := StrToInt('$'+Copy(Elem,Idx,6));
ColorMap^.Color := RGB(
Byte(StrToInt('$'+Copy(Elem,Idx+1,2))),
Byte(StrToInt('$'+Copy(Elem,Idx+3,2))),
Byte(StrToInt('$'+Copy(Elem,Idx+5,2))));
end
Else
ColorMap^.Color := TransColor;
Assert(False, Format('Trace:CreateColorMap - color-map entry info --> item: %D, data: %S, alias: %S, color:0x%X', [I, String(PixmapArray^[I]), ColorMap^.Alias, ColorMap^.Color]));
AList.Add(ColorMap);
Except
On E: Exception Do Assert(False, Format('Trace:CreateColorMap - Could not create color-map entry --> %S', [E.Message]));
End;
End;
Assert(False, 'Trace:CreateColorMap - Exit');
End;
Procedure DestroyColorMap;
var
ColorMap : PColorMap;
Begin
Assert(False, 'Trace:DestroyColorMap - Start');
While AList.Count>0 do begin
ColorMap:=PColorMap(AList.Items[0]);
Dispose(ColorMap);
AList.Delete(0);
end;
If AList <> Nil Then Begin
AList.Free;
AList := Nil;
End;
Assert(False, 'Trace:DestroyColorMap - Exit');
End;
function GetColorFromAlias(Alias:String):DWORD;
var
i : Cardinal;
begin
result:=0;
i :=0;
if AList.Count>0 then begin
repeat
if (TColorMap(AList.Items[i]^).Alias=Alias) then begin
result:=TColorMap(AList.Items[i]^).Color;
break;
end;
Inc(i);
until (i>=ColorCount);
end;
end;
Procedure DoDrawBitmap;
Var
CX,CY : Cardinal;
Line,Alias : String;
Begin
Assert(False, 'Trace:DoDrawBitmap - Start');
If (ColorCount = 0) Or (AList = Nil) Then
Begin
Assert(False, 'Trace:DoDrawBitmap - No information to create bitmap');
Exit;
End;
for CY:=0 to Height-1 do begin
Line:=String(PixmapArray^[1+ColorCount+CY]);
While Pos(Line[Length(Line)],'",')>0 do Line:=Copy(Line,1,Length(Line)-1);
for CX:=0 to Width-1 do begin
Alias:=Copy(Line,1+CX*AliasLen,AliasLen);
Windows.SetPixel(hdcBitmap,CX,CY,GetColorFromAlias(Alias));
end;
end;
Assert(False, 'Trace:DoDrawBitmap - Exit');
End;
Begin
Assert(False, 'Trace:TWin32WidgetSet. - Start');
Height := 0;
Width := 0;
ColorCount := 0;
AliasLen := 0;
Result := HBITMAP(Nil);
PixmapArray := PPixmapArray(Data);
Info := String(PixmapArray^[0]);
PixmapInfo := TStringList.Create;;
NormalizeString(Info);
//My own Split:
while Pos(' ',Info)>0 do begin
PixmapInfo.Add(Copy(Info,1,Pos(' ',Info)-1)); //Add first String to list
Delete(Info,1,Pos(' ',Info)); //Delete String + Space
end;
if Length(Info)>0 then PixmapInfo.Add(Info); //Add last String;
// I don't know where this Split is defines, but it does something weired
// PixmapInfo := Split(String(PixmapArray^[0]), ' ', 3, False);
If PixmapInfo.Count = 6 Then Assert(False, 'Trace:TODO: TWin32WidgetSet.CreatePixmapIndirect - Get Pixmaps with six sections working');
Try
Width := StrToInt(PixmapInfo[0]); Assert(False, Format('Trace: Pixmap width --> %D', [Width]));
Height := StrToInt(PixmapInfo[1]); Assert(False, Format('Trace: Pixmap height --> %D', [Height]));
ColorCount := StrToInt(PixmapInfo[2]); Assert(False, Format('Trace: number of colors --> %D', [ColorCount]));
While Pos(PixmapInfo[3][Length(PixmapInfo[3])],'",')>0 do
PixmapInfo[3]:=Copy(PixmapInfo[3],1,Length(PixMapInfo[3])-1);
AliasLen := StrToInt(PixmapInfo[3]);
Assert(False, Format('Trace: characters per pixel --> %D', [AliasLen]));
Assert(False, Format('Trace:TWin32WidgetSet.CreatePixmapIndirect - Pixmap info: Width - %D; Height - %D; Number of Colors - %D; Characters per pixel - %D; Transparent color - 0x%X', [Width, Height, ColorCount, AliasLen, TransColor]));
Except
On E: Exception Do
Begin
Assert(False, 'Trace:Error: TWin32WidgetSet.CreatePixmapIndirect - could not retrieve pixmap info --> ' + E.Message);
End;
End;
If (Width <> 0) And (Height <> 0) Then Begin
hdcScreen := Windows.GetDC(GetDesktopWindow);
hdcBitmap := CreateCompatibleDC(hdcScreen);
hbmBitmap := CreateCompatibleBitmap(hdcScreen, Width, Height);
OldObject := SelectObject(hdcBitmap, hbmBitmap);
CreateColorMap;
DoDrawBitmap;
DestroyColorMap;
ReleaseDC(GetDesktopWindow, hdcScreen);
SelectObject(hdcBitmap, OldObject);
DeleteDC(hdcBitmap);
Result:=hbmBitmap;
end;
PixmapInfo.Free;
PixmapInfo := Nil;
PixmapArray := Nil;
Assert(False, 'Trace:TWin32WidgetSet.CreatePixmapIndirect - Exit');
End;
{------------------------------------------------------------------------------
Method: CreatePolygonRgn
Params: Points, NumPts, FillMode
Returns: the handle to the region
Creates a Polygon, a closed many-sided shaped region. The Points parameter is
an array of points that give the vertices of the polygon. FillMode=Winding
determines what points are going to be included in the region. When Winding
is True, points are selected by using the Winding fill algorithm. When Winding
is False, points are selected by using using the even-odd (alternative) fill
algorithm. NumPts indicates the number of points to use.
The first point is always connected to the last point.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CreatePolygonRgn(Points: PPoint; NumPts: Integer;
FillMode: integer): HRGN;
Begin
Result := Windows.CreatePolygonRgn(LPPOINT(Points)^, NumPts, FillMode);
End;
{------------------------------------------------------------------------------
Method: CreateRectRgn
Params: X1 - x-coordinate of region's upper-left corner
Y1 - y-coordinate of region's upper-left corner
X2 - x-coordinate of region's lower-right corner
Y2 - y-coordinate of region's lower-right corner
Returns: the handle to the region
Creates a rectangular region.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.CreateRectRgn(X1, Y1, X2, Y2: Integer): HRGN;
Begin
Result := Windows.CreateRectRgn(X1, Y1, X2, Y2);
End;
{------------------------------------------------------------------------------
Method: DeleteDC
Params: HDC - handle to device context
Returns: If the function succeeds.
Deletes the specified device context (DC).
------------------------------------------------------------------------------}
Function TWin32WidgetSet.DeleteDC(HDC: HDC): Boolean;
Begin
Result := Boolean(Windows.DeleteDC(HDC));
End;
{------------------------------------------------------------------------------
Method: DeleteObject
Params: GDIObject - handle to graphic object
Returns: If the function succeeds.
Deletes a graphic object, freeing all system resources associated with the
object.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.DeleteObject(GDIObject: HGDIOBJ): Boolean;
Begin
{ Find out if we want to release internal GDI object }
Result := Boolean(Windows.DeleteObject(GDIObject));
End;
{------------------------------------------------------------------------------
Method: DestroyCaret
Params: Handle - handle to the window with a caret (on Windows, there is
only one, global caret, so this parameter is ignored)
Returns: If the function succeeds
Destroys the caret but doesn't free the bitmap.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.DestroyCaret(Handle: HWND): Boolean;
Begin
Assert(False, 'Trace:TODO: [TWin32WidgetSet.DestroyCaret]');
Result := Boolean(Windows.DestroyCaret);
End;
{------------------------------------------------------------------------------
Method: DrawFrameControl
Params: DC - handle to device context
Rect - bounding rectangle
UType - frame-control type
UState - frame-control state
Returns: If the function succeeds
Draws a frame control of the specified type and style.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.DrawFrameControl(DC: HDC; Var Rect: TRect; UType, UState: Cardinal): Boolean;
var
Flags: dword;
Begin
// flat button border cannot be drawn by DrawFrameControl, draw ourselves
if (UType = DFC_BUTTON) or ((UState and DFCS_FLAT) <> 0) then
begin
if (UState and DFCS_PUSHED) <> 0 then
Flags := BDR_SUNKENOUTER
else
Flags := BDR_RAISEDINNER;
Result := Boolean(Windows.DrawEdge(DC, @Rect, Flags, BF_RECT));
end else begin
Result := Boolean(Windows.DrawFrameControl(DC, @Rect, UType, UState));
end;
End;
{------------------------------------------------------------------------------
Method: DrawEdge
Params: DC - handle to device context
Rect - rectangle coordinates
Edge - type of inner and outer edge to draw
GrfFlags - type of border
Returns: If the function succeeds.
Draws one or more edges of a rectangle, not including the
right and bottom edge.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.DrawEdge(DC: HDC; Var Rect: TRect; Edge: Cardinal; GrfFlags: Cardinal): Boolean;
Begin
Assert(False, Format('trace:> [TWin32WidgetSet.DrawEdge] DC:0x%x, Rect = %d,%d,%d,%d', [DC, Rect.Left, Rect.Top, Rect.Right, Rect.Bottom]));
Result := Boolean(Windows.DrawEdge(DC, @Rect, edge, grfFlags));
Assert(False, Format('trace:< [TWin32WidgetSet.DrawEdge] DC:0x%x, Rect = %d,%d,%d,%d', [DC, Rect.Left, Rect.Top, Rect.Right, Rect.Bottom]));
End;
{------------------------------------------------------------------------------
Method: DrawText
Params: DC, Str, Count, Rect, Flags
Returns: If the string was drawn, or CalcRect run
------------------------------------------------------------------------------}
function TWin32WidgetSet.DrawText(DC: HDC; Str: PChar; Count: Integer; var Rect: TRect; Flags: Cardinal): Integer;
begin
Assert(False, Format('trace:> [TWin32WidgetSet.DrawText] DC:0x%x, Str:''%s'', Count: %d, Rect = %d,%d,%d,%d, Flags:%d',
[DC, Str, Count, Rect.Left, Rect.Top, Rect.Right, Rect.Bottom, Flags]));
Result := Windows.DrawText(DC, Str, Count, @Rect, Flags);
Assert(False, Format('trace:> [TWin32WidgetSet.DrawText] DC:0x%x, Str:''%s'', Count: %d, Rect = %d,%d,%d,%d, Flags:%d',
[DC, Str, Count, Rect.Left, Rect.Top, Rect.Right, Rect.Bottom, Flags]));
end;
{------------------------------------------------------------------------------
Method: Ellipse
Params:
DC - handle to device context
X1 - x-coord. of bounding rectangle's upper-left corner
Y1 - y-coord. of bounding rectangle's upper-left corner
X2 - x-coord. of bounding rectangle's lower-right corner
Y2 - y-coord. of bounding rectangle's lower-right corner
Returns: If the function succeeds
Use Ellipse to draw a filled circle or ellipse.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.Ellipse(DC: HDC; X1, Y1, X2, Y2: Integer): Boolean;
Begin
Result := Boolean(Windows.Ellipse(DC, X1, Y1, X2, Y2));
End;
{------------------------------------------------------------------------------
Method: EmptyClipBoard
Params: none
Returns: If the function succeeds
Empties the clipboard, frees handles to data in the clipboard, and ssigns
ownership of the clipboard to the window that currently has the clipboard
open.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.EmptyClipBoard: Boolean;
Begin
Result := Boolean(Windows.EmptyClipboard);
End;
{------------------------------------------------------------------------------
Method: EnableScrollBar
Params: Wnd - handle to window or scroll bar
WSBFlags - scroll bar type flag
WArrows - scroll bar arrow flag
Returns: Nothing
------------------------------------------------------------------------------}
Function TWin32WidgetSet.EnableScrollBar(Wnd: HWND; WSBFlags, WArrows: Cardinal): Boolean;
Begin
Assert(False, 'Trace:TODO: [TWin32WidgetSet.EnableScrollBar]');
//TODO: Implement this;
Result := Boolean(Windows.EnableScrollBar(Wnd, WSBFlags, WArrows));
End;
{------------------------------------------------------------------------------
Method: EnableWindow
Params: HWnd - handle to window
BEnable - whether to enable the window
Returns: If the window was previously disabled
Enables or disables mouse and keyboard input to the specified window or
control.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.EnableWindow(hWnd: HWND; bEnable: Boolean): Boolean;
Begin
Assert(False, Format('Trace:[TWin32WidgetSet.EnableWindow] HWnd: 0x%x, BEnable: %s', [HWnd, BOOL_TEXT[BEnable]]));
Result := Boolean(Windows.EnableWindow(HWnd, BEnable));
End;
{------------------------------------------------------------------------------
Method: EndPaint
Params: Handle - Handle to window
PS - PAINTSTRUCT variable with painting information
Returns: always nonzero.
The EndPaint function marks the end of painting in the specified window.
This function is required for each call to the BeginPaint function, but only
after painting is complete.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.EndPaint(Handle : hwnd; var PS : TPaintStruct): Integer;
Begin
Result := Integer(Windows.EndPaint(Handle, @PS));
End;
{------------------------------------------------------------------------------
Function: ExcludeClipRect
Params: dc, Left, Top, Right, Bottom
Returns: integer
Subtracts all intersecting points of the passed bounding rectangle
(Left, Top, Right, Bottom) from the Current clipping region in the
device context (dc).
The result can be one of the following constants
Error
NullRegion
SimpleRegion
ComplexRegion
------------------------------------------------------------------------------}
function TWin32WidgetSet.ExcludeClipRect(dc: hdc;
Left, Top, Right, Bottom : Integer) : Integer;
begin
Result := Windows.ExcludeClipRect(dc, Left, Top, Right, Bottom);
end;
{------------------------------------------------------------------------------
Method: ExtTextOut
Params: DC - handle to device context
X - x-coordinate of reference point
Y - x-coordinate of reference point
Options - text-output options
Rect - optional clipping and/or opaquing rectangle
Str - character string to be drawn
Count - number of characters in string
Dx - pointer to array of intercharacter spacing values
Returns: If the string was drawn.
Draws a character string by using the currently selected font.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ExtTextOut(DC: HDC; X, Y: Integer; Options: Longint; Rect: PRect; Str: PChar; Count: Longint; Dx: PInteger): Boolean;
Begin
Assert(False, Format('trace:> [TWin32WidgetSet.ExtTextOut] DC:0x%x, X:%d, Y:%d, Options:%d, Str:''%s'', Count: %d', [DC, X, Y, Options, Str, Count]));
Result := Boolean(Windows.ExtTextOut(DC, X, Y, Options, LPRECT(Rect), Str, Count, Dx));
Assert(False, Format('trace:< [TWin32WidgetSet.ExtTextOut] DC:0x%x, X:%d, Y:%d, Options:%d, Str:''%s'', Count: %d', [DC, X, Y, Options, Str, Count]));
End;
{------------------------------------------------------------------------------
Function: ExtSelectClipRGN
Params: dc, RGN, Mode
Returns: integer
Combines the passed Region with the current clipping region in the device
context (dc), using the specified mode.
The Combine Mode can be one of the following:
RGN_AND : all points which are in both regions
RGN_COPY : an exact copy of the source region, same as SelectClipRGN
RGN_DIFF : all points which are in the Clipping Region but
but not in the Source.(Clip - RGN)
RGN_OR : all points which are in either the Clip Region or
in the Source.(Clip + RGN)
RGN_XOR : all points which are in either the Clip Region
or in the Source, but not in both.
The result can be one of the following constants
Error
NullRegion
SimpleRegion
ComplexRegion
------------------------------------------------------------------------------}
function TWin32WidgetSet.ExtSelectClipRGN(dc: hdc; rgn : hrgn; Mode : Longint) : Integer;
begin
Result := Windows.ExtSelectClipRGN(DC, RGN, Mode);
end;
{------------------------------------------------------------------------------
Method: FillRect
Params: DC - handle to device context
Rect - record with rectangle
Brush - handle to brush
Returns: If the function succeeds
The FillRect Function fills a rectangle by using the specified brush.
This Function includes the left and top borders, but excludes the right and
bottom borders of the rectangle.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.FillRect(DC: HDC; Const Rect: TRect; Brush: HBRUSH): Boolean;
Var
R: TRect;
Begin
R := Rect;
Assert(False, Format('trace:> [TWin32WidgetSet.FillRect] DC: 0x%x; Rect: ((%d,%d)(%d,%d)); Brush: %x', [Integer(DC), R.left, R.top, R.right, R.bottom, brush]));
Result := Boolean(Windows.FillRect(DC, Windows.RECT(r), Brush));
Assert(False, Format('trace:< [TWin32WidgetSet.FillRect] DC: 0x%x; Rect: ((%d,%d)(%d,%d)); Brush: %x', [Integer(DC), R.left, R.top, R.right, R.bottom, brush]));
End;
{------------------------------------------------------------------------------
Method: Frame3D
Params: DC - handle to device context
Rect - bounding rectangle
FrameWidth - width of the frame (ignored on win32)
Style - frame style
Returns: Whether the function was successful
Draws a 3D border in GTK native style.
NOTE: This function is mapped to DrawEdge on Windows.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.Frame3D(DC: HDC; var Rect: TRect;
Const FrameWidth: Integer; Const Style: TBevelCut): Boolean;
Const
Edge: Array[TBevelCut] Of Integer = (0, BDR_SUNKENOUTER, BDR_RAISEDINNER, 0);
Begin
Result := Boolean(DrawEdge(DC, Rect, Edge[Style], BF_RECT));
End;
{------------------------------------------------------------------------------
Method: GetActiveWindow
Params: none
Returns: The handle to the active window
Retrieves the window handle to the active window associated with the thread
that calls the function.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetActiveWindow: HWND;
Begin
Result := Windows.GetActiveWindow;
End;
{------------------------------------------------------------------------------
Method: GetCapture
Params: none
Returns: the handle of the capture window
Retrieves the handle of the window (if any) that has captured the mouse.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetCapture: HWND;
Begin
Result := Windows.GetCapture;
End;
{------------------------------------------------------------------------------
Method: GetCaretPos
Params: LPPoint - record to receive coordinates
Returns: If the function succeeds
Gets the caret's position, in client coordinates.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetCaretPos(Var LPPoint: TPoint): Boolean;
Begin
Result := Boolean(Windows.GetCaretPos(@LPPoint));
End;
{------------------------------------------------------------------------------
Method: GetCharABCWidths
Params: DC - handle of device context
P2 - first character in range to query
P3 - last character in range to query
ABCStructs - character-width record
Returns: If the function succeeds
Retrieves the widths, in logical units, of consecutive characters in a given
range from the current TrueType font.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetCharABCWidths(DC: HDC; P2, P3: UINT; Const ABCStructs): Boolean;
Begin
Result := Boolean(Windows.GetCharABCWidths(DC, P2, P3, ABCStructs));
End;
{------------------------------------------------------------------------------
Method: GetClientRect
Params: Handle - handle of window
Rect - record for client coordinates
Returns: If the function succeeds
Retrieves the coordinates of a window's client area.
------------------------------------------------------------------------------}
function TWin32WidgetSet.GetClientBounds(Handle: HWND; var Rect: TRect): Boolean;
var
ARect: TRect;
begin
Result := Boolean(Windows.GetClientRect(Handle, @Rect));
if not Result then exit;
if not GetLCLClientBoundsOffset(Handle, ARect) then exit;
Inc(Rect.Left, ARect.Left);
Inc(Rect.Top, ARect.Top);
Inc(Rect.Right, ARect.Right);
Inc(Rect.Bottom, ARect.Bottom);
end;
{------------------------------------------------------------------------------
Method: GetClientRect
Params: Handle - handle of window
Rect - record for client coordinates
Returns: If the function succeeds
Retrieves the dimension of a window's client area.
Left and Top are always 0,0
------------------------------------------------------------------------------}
function TWin32WidgetSet.GetClientRect(Handle: HWND; var Rect: TRect): Boolean;
begin
Result := GetClientBounds(Handle, Rect);
OffsetRect(Rect, -Rect.Left, -Rect.Top);
end;
{------------------------------------------------------------------------------
Function: GetClipBox
Params: dc, lprect
Returns: Integer
Returns the smallest rectangle which includes the entire current
Clipping Region.
The result can be one of the following constants
Error
NullRegion
SimpleRegion
ComplexRegion
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetClipBox(DC : hDC; lpRect : PRect) : Longint;
begin
Result := Windows.GetClipBox(DC, Windows.LPRECT(lpRect));
end;
{------------------------------------------------------------------------------
Function: GetClipRGN
Params: dc, rgn
Returns: Integer
Returns the current Clipping Region.
The result can be one of the following constants
Error
NullRegion
SimpleRegion
ComplexRegion
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetClipRGN(DC : hDC; RGN : hRGN) : Integer;
begin
Result := Windows.GetClipRGN(DC, RGN);
end;
{------------------------------------------------------------------------------
Method: GetCursorPos
Params: LPPoint - record to receive coordinates
Returns: True if the function succeeds
Gets the cursor position, in screen coordinates.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetCursorPos(Var LPPoint: TPoint): Boolean;
Begin
Result := Boolean(Windows.GetCursorPos(@LPPoint));
End;
{------------------------------------------------------------------------------
Method: GetDC
Params: HWND - handle of window
Returns: value identifying the device context for the given window's client
area
Retrieves a handle of a display device context (DC) for the client area of
the specified window.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetDC(HWnd: HWND): HDC;
var
ORect: TRect;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.GetDC] HWND: 0x%x', [HWnd]));
Result := Windows.GetDC(HWnd);
if (Result<>0) and (HWnd<>0)
and GetLCLClientBoundsOffset(HWnd, ORect) then begin
MoveWindowOrgEx(Result, ORect.Left, ORect.Top);
end;
Assert(False, Format('Trace:< [TWin32WidgetSet.GetDC] Got 0x%x', [Result]));
End;
{------------------------------------------------------------------------------
Method: GetDeviceCaps
Params: DC - display device context
Index - index of needed capability
Returns device specific information
------------------------------------------------------------------------------}
function TWin32WidgetSet.GetDeviceCaps(DC: HDC; Index: Integer): Integer;
begin
Result := Windows.GetDeviceCaps(DC, Index);
end;
function TWin32WidgetSet.GetDesignerDC(WindowHandle: HWND): HDC;
var
OverlayWindow: HWND;
ARect: Windows.RECT;
WindowInfo, OverlayWindowInfo: PWindowInfo;
begin
WindowInfo := GetWindowInfo(WindowHandle);
OverlayWindow := WindowInfo^.Overlay;
if OverlayWindow = HWND(nil) then
begin
// create 'overlay' window
Windows.GetClientRect(WindowHandle, @ARect);
OverlayWindow := Windows.CreateWindowEx(WS_EX_TRANSPARENT,
@ClsName, '', WS_CHILD or WS_VISIBLE,
ARect.Left, ARect.Top, ARect.Right, ARect.Bottom,
WindowHandle, HMENU(nil), HInstance, nil);
OverlayWindowInfo := AllocWindowInfo(OverlayWindow);
OverlayWindowInfo^.DefWndProc := Windows.WNDPROC(Windows.SetWindowLong(
OverlayWindow, GWL_WNDPROC, LongInt(@OverlayWindowProc)));
OverlayWindowInfo^.WinControl := WindowInfo^.WinControl;
WindowInfo^.Overlay := OverlayWindow;
end;
// bring overlay window to front
Windows.SetWindowPos(OverlayWindow, HWND_TOP, 0, 0, 0, 0, SWP_NOSIZE or SWP_NOMOVE);
Result := Windows.GetDC(OverlayWindow);
end;
function TWin32WidgetSet.GetDCOriginRelativeToWindow(PaintDC: HDC;
WindowHandle: HWND; var OriginDiff: TPoint): boolean;
var
DCOrg, winOrg: Windows.POINT;
ORect: TRect;
begin
OriginDiff.X := 0;
OriginDiff.Y := 0;
Result := Windows.GetDCOrgEx(PaintDC, DCOrg);
if not Result then exit;
winOrg.X := 0;
winOrg.Y := 0;
Result := Windows.ClientToScreen(WindowHandle, winOrg);
if not Result then exit;
Result := GetLCLClientBoundsOffset(WindowHandle, ORect);
if not Result then exit;
OriginDiff.X := DCOrg.X - winOrg.X - ORect.Left;
OriginDiff.Y := DCOrg.Y - winOrg.Y - ORect.Top;
Result := Windows.GetWindowOrgEx(PaintDC, winOrg);
if not Result then exit;
dec(OriginDiff.X, winOrg.X);
dec(OriginDiff.Y, winOrg.Y);
end;
function TWin32WidgetSet.GetDeviceSize(DC: HDC; var P: TPoint): Boolean;
var
hBitmap: HGDIOBJ;
hWindow: HWND;
BitmapInfo: BITMAP;
ClientRect: TRect;
begin
// check if memory dc with bitmap
Result := false;
case GetObjectType(DC) of
OBJ_MEMDC:
begin
hBitmap := GetCurrentObject(DC, OBJ_BITMAP);
if hBitmap <> HGDIOBJ(nil) then
begin
GetObject(hBitmap, SizeOf(BITMAP), @BitmapInfo);
P.x := BitmapInfo.bmWidth;
P.y := BitmapInfo.bmHeight;
Result := true;
end;
end;
OBJ_DC:
begin
hWindow := WindowFromDC(DC);
if hWindow <> HWND(nil) then
begin
Result := GetClientRect(hWindow, ClientRect);
P.x := ClientRect.Right;
P.y := ClientRect.Bottom;
end;
end;
else
end;
if not Result then
begin
// do default
Result := inherited GetDeviceSize(DC, P);
end;
end;
function TWin32WidgetSet.GetDIBits(DC: HDC; Bitmap: HBitmap; StartScan, NumScans: UINT; Bits: Pointer; var BitInfo: BitmapInfo; Usage: UINT): Integer;
begin
Result := Windows.GetDIBits(DC, Bitmap, StartScan, NumScans, Bits, Windows.PBitmapInfo(@BitInfo)^, Usage)
end;
function TWin32WidgetSet.GetBitmapBits(Bitmap: HBITMAP; Count: Longint; Bits: Pointer): Longint;
begin
Result := Windows.GetBitmapBits(Bitmap, Count, Bits);
end;
procedure TWin32WidgetSet.FillRawImageDescriptionColors(Desc: PRawImageDescription);
begin
case Desc^.BitsPerPixel of
1,4,8:
begin
// palette mode, no offsets
Desc^.Format := ricfGray;
Desc^.RedPrec := Desc^.BitsPerPixel;
Desc^.GreenPrec := 0;
Desc^.BluePrec := 0;
Desc^.RedShift := 0;
Desc^.GreenShift := 0;
Desc^.BlueShift := 0;
end;
16:
begin
// 5-5-5 mode
Desc^.RedPrec := 5;
Desc^.GreenPrec := 5;
Desc^.BluePrec := 5;
Desc^.RedShift := 10;
Desc^.GreenShift := 5;
Desc^.BlueShift := 0;
Desc^.Depth := 15;
end;
24:
begin
// 8-8-8 mode
Desc^.RedPrec := 8;
Desc^.GreenPrec := 8;
Desc^.BluePrec := 8;
Desc^.RedShift := 16;
Desc^.GreenShift := 8;
Desc^.BlueShift := 0;
end;
else // 32:
// 0-8-8-8 mode, high byte is not used
Desc^.RedPrec := 8;
Desc^.GreenPrec := 8;
Desc^.BluePrec := 8;
Desc^.RedShift := 16;
Desc^.GreenShift := 8;
Desc^.BlueShift := 0;
Desc^.Depth := 24;
end;
end;
procedure TWin32WidgetSet.FillRawImageDescription(const BitmapInfo: Windows.TBitmap;
Desc: PRawImageDescription);
begin
Desc^.Format := ricfRGBA;
Desc^.HasPalette := BitmapInfo.bmBitsPixel <= 8; // if true, each pixel is an index in the palette
Desc^.Depth := BitmapInfo.bmBitsPixel; // used bits per pixel
Desc^.Width := BitmapInfo.bmWidth;
Desc^.Height := BitmapInfo.bmHeight;
Desc^.PaletteColorCount := 0; // TODO, also `ColorCount'
Desc^.BitOrder := riboReversedBits;
Desc^.ByteOrder := riboLSBFirst;
Desc^.LineOrder := riloTopToBottom;
Desc^.ColorCount := 0; // entries in color palette. Ignore when no palette.
Desc^.BitsPerPixel := BitmapInfo.bmBitsPixel; // bits per pixel. can be greater than Depth.
Desc^.LineEnd := rileDWordBoundary;
FillRawImageDescriptionColors(Desc);
Desc^.AlphaShift := 0;
Desc^.AlphaSeparate := true; // the alpha is stored as separate Mask
// The next values are only valid, if there is a separate alpha mask
Desc^.AlphaBitsPerPixel := 1; // bits per alpha mask pixel.
Desc^.AlphaPrec := 1;
Desc^.AlphaLineEnd := rileDWordBoundary;
Desc^.AlphaBitOrder := riboReversedBits;
Desc^.AlphaByteOrder := riboLSBFirst;
end;
function TWin32WidgetSet.GetBitmapRawImageDescription(Bitmap: HBITMAP;
Desc: PRawImageDescription): Boolean;
var
BitmapInfo: Windows.TBitmap;
begin
Result := Windows.GetObject(Bitmap, SizeOf(BitmapInfo), @BitmapInfo) > 0;
if Result then
FillRawImageDescription(BitmapInfo, Desc);
end;
function TWin32WidgetSet.GetDeviceRawImageDescription(DC: HDC; Desc: PRawImageDescription): boolean;
begin
Result := true;
FillChar(Desc^, SizeOf(Desc^), 0);
Desc^.Format := ricfRGBA;
Desc^.HasPalette := (Windows.GetDeviceCaps(DC, RASTERCAPS) and RC_PALETTE) <> 0;
Desc^.Depth := Windows.GetDeviceCaps(DC, BITSPIXEL) * Windows.GetDeviceCaps(DC, PLANES);
// Width and Height not relevant
Desc^.PaletteColorCount := Windows.GetDeviceCaps(DC, SIZEPALETTE);
Desc^.BitOrder := riboReversedBits;
Desc^.ByteOrder := riboLSBFirst;
Desc^.LineOrder := riloTopToBottom;
Desc^.ColorCount := Desc^.PaletteColorCount;
if Desc^.HasPalette then
Desc^.BitsPerPixel := Windows.GetDeviceCaps(DC, COLORRES)
else
Desc^.BitsPerPixel := Desc^.Depth;
Desc^.LineEnd := rileDWordBoundary;
FillRawImageDescriptionColors(Desc);
Desc^.AlphaPrec := 1;
Desc^.AlphaSeparate := true; // the alpha is stored as separate Mask
// The next values are only valid, if there is a separate alpha mask
Desc^.AlphaBitsPerPixel := 1; // bits per alpha mask pixel.
Desc^.AlphaBitOrder := riboReversedBits;
Desc^.AlphaByteOrder := riboLSBFirst;
// CreateBitmap winapi call wants word-aligned data
Desc^.AlphaLineEnd := rileWordBoundary;
Desc^.AlphaShift := 0;
end;
function TWin32WidgetSet.GetRawImageFromDevice(SrcDC: HDC; const SrcRect: TRect; var NewRawImage: TRawImage): boolean;
var
SrcWidth, SrcHeight: Integer;
hMemDC: HDC;
hMemBitmap: HBITMAP;
hOldObject: HGDIOBJ;
begin
FillChar(NewRawImage, SizeOf(NewRawImage), 0);
// make bitmap compatible to src device
SrcWidth := SrcRect.Right - SrcRect.Left;
SrcHeight := SrcRect.Bottom - SrcRect.Top;
hMemBitmap := Windows.CreateCompatibleBitmap(SrcDC, SrcWidth, SrcHeight);
Result := hMemBitmap <> 0;
if not Result then exit;
// make memory device context compatible to device, to select bitmap in for copying
hMemDC := Windows.CreateCompatibleDC(SrcDC);
Result := hMemDC <> 0;
hOldObject := Windows.SelectObject(hMemDC, hMemBitmap);
// copy srcdc -> membitmap
Result := Result and Windows.BitBlt(hMemDC, 0, 0, SrcWidth, SrcHeight,
SrcDC, SrcRect.Left, SrcRect.Top, SRCCOPY);
// done copying, deselect bitmap from dc
Windows.SelectObject(hMemDC, hOldObject);
// copy membitmap -> rawimage
Result := Result and GetRawImageFromBitmap(hMemBitmap, 0,
Rect(0, 0, SrcWidth, SrcHeight), NewRawImage);
// free temporary stuff
Windows.DeleteDC(hMemDC);
Windows.DeleteObject(hMemBitmap);
end;
procedure TWin32WidgetSet.AllocAndCopy(const BitmapInfo: Windows.TBitmap;
const BitmapHandle: HBITMAP; const SrcRect: TRect; var Data: PByte;
var Size: Cardinal);
var
bmInfo: TBitmapInfo;
ScreenDC: HDC;
begin
// initialize bitmapinfo structure
bmInfo.bmiHeader.biSize := sizeof(bmInfo.bmiHeader);
bmInfo.bmiHeader.biWidth := BitmapInfo.bmWidth;
bmInfo.bmiHeader.biHeight := BitmapInfo.bmHeight;
// request a top-down DIB
if bmInfo.bmiHeader.biHeight > 0 then
bmInfo.bmiHeader.biHeight := -bmInfo.bmiHeader.biHeight;
bmInfo.bmiHeader.biPlanes := 1;
bmInfo.bmiHeader.biBitCount := BitmapInfo.bmBitsPixel;
bmInfo.bmiHeader.biCompression := BI_RGB;
ScreenDC := GetDC(0);
// allocate memory for pixel data, N scanlines
if GetDIBits(ScreenDC, BitmapHandle, SrcRect.Top, SrcRect.Bottom-SrcRect.Top, nil, bmInfo, DIB_RGB_COLORS) <> 0 then
begin
Size := bmInfo.bmiHeader.biSizeImage;
GetMem(Data, Size);
GetDIBits(ScreenDC, BitmapHandle, SrcRect.Top, SrcRect.Bottom-SrcRect.Top, Data, bmInfo, DIB_RGB_COLORS);
end else begin
Data := nil;
Size := 0;
end;
// release resources
ReleaseDC(0, ScreenDC);
end;
function TWin32WidgetSet.GetRawImageFromBitmap(SrcBitmap, SrcMaskBitmap: HBITMAP; const SrcRect: TRect; var NewRawImage: TRawImage): boolean;
var
BitmapInfo: Windows.TBitmap;
ARect: TRect;
begin
FillChar(NewRawImage, SizeOf(NewRawImage), 0);
Result := Windows.GetObject(SrcBitmap, SizeOf(BitmapInfo), @BitmapInfo) > 0;
if not Result then exit;
FillRawImageDescription(BitmapInfo, @NewRawImage.Description);
ARect := SrcRect;
if ARect.Top > BitmapInfo.bmHeight then
ARect.Top := BitmapInfo.bmHeight;
if ARect.Bottom > BitmapInfo.bmHeight then
ARect.Bottom := BitmapInfo.bmHeight;
if ARect.Left > BitmapInfo.bmWidth then
ARect.Left := BitmapInfo.bmWidth;
if ARect.Right > BitmapInfo.bmWidth then
ARect.Right := BitmapInfo.bmWidth;
// copy bitmap
AllocAndCopy(BitmapInfo, SrcBitmap, ARect, NewRawImage.Data, NewRawImage.DataSize);
// check mask
if SrcMaskBitmap <> 0 then
begin
Result := Windows.GetObject(SrcMaskBitmap, SizeOf(BitmapInfo), @BitmapInfo) > 0;
if not Result then exit;
AllocAndCopy(BitmapInfo, SrcMaskBitmap, ARect, NewRawImage.Mask, NewRawImage.MaskSize);
NewRawImage.Description.AlphaSeparate := true;
end;
end;
function TWin32WidgetSet.CreateBitmapFromRawImage(const RawImage: TRawImage;
var Bitmap, MaskBitmap: HBitmap; AlwaysCreateMask: boolean): boolean;
var
BitmapInfo: TBitmapInfo;
hScreenDC: HDC;
begin
FillChar(BitmapInfo, SizeOf(BitmapInfo), 0);
BitmapInfo.bmiHeader.biSize := SizeOf(BitmapInfo.bmiHeader);
BitmapInfo.bmiHeader.biWidth := RawImage.Description.Width;
BitmapInfo.bmiHeader.biHeight := -RawImage.Description.Height;
BitmapInfo.bmiHeader.biPlanes := 1;
BitmapInfo.bmiHeader.biBitCount := RawImage.Description.BitsPerPixel;
BitmapInfo.bmiHeader.biCompression := BI_RGB;
{BitmapInfo.bmiHeader.biSizeImage := 0;}
hScreenDC := Windows.GetDC(0);
MaskBitmap := 0;
Bitmap := Windows.CreateDIBitmap(hScreenDC, Windows.TBitmapInfoHeader(BitmapInfo.bmiHeader), CBM_INIT, RawImage.Data,
Windows.TBitmapInfo(BitmapInfo), DIB_RGB_COLORS);
Result := Bitmap <> 0;
if Result then
begin
if (AlwaysCreateMask or (not RawImageMaskIsEmpty(@RawImage,true))) then
begin
if RawImage.Description.AlphaSeparate then
begin
MaskBitmap := Windows.CreateBitmap(RawImage.Description.Width,
RawImage.Description.Height, 1, 1, RawImage.Mask);
Result := Result and (MaskBitmap <> 0);
end;
end;
end;
Windows.ReleaseDC(0, hScreenDC);
end;
function TWin32WidgetSet.CreateDIBSection(DC: HDC; const p2: tagBitmapInfo; p3: UINT;
var p4: Pointer; p5: THandle; p6: DWORD): HBITMAP;
begin
Result := Windows.CreateDIBSection(DC, Windows.PBitmapInfo(@p2)^, p3, p4, p5, p6)
end;
{------------------------------------------------------------------------------
Method: GetFocus
Params: none
Returns: The handle of the window with focus
The GetFocus function retrieves the handle of the window that has the focus.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetFocus: HWND;
Begin
Result := Windows.GetFocus;
End;
{------------------------------------------------------------------------------
Method: GetKeyState
Params: NVirtKey - The requested key
Returns: If the Function succeeds, the return value specifies the status of
the given virtual key. If the high-order bit is 1, the key is down;
otherwise, it is up. If the low-order bit is 1, the key is toggled.
The GetKeyState Function retrieves the status of the specified virtual key.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetKeyState(nVirtKey: Integer): Smallint;
Begin
Result := Windows.GetKeyState(nVirtKey);
End;
{------------------------------------------------------------------------------
Method: GetObject
Params: GDIObj - handle to graphics object of interest
BufSize - size of buffer for object information
Buf - pointer to buffer for object information
Returns: the number of bytes stored into the buffer
Gets information about a specified graphics object.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetObject(GDIObj: HGDIOBJ; BufSize: Integer; Buf: Pointer): Integer;
Begin
Assert(False, 'Trace:[TWin32WidgetSet.GetObject]');
Result := Windows.GetObject(GDIObj, BufSize, Buf);
End;
{------------------------------------------------------------------------------
Method: GetParent
Params: Handle - handle of child window
Returns: the handle of the parent window
Retrieves the handle of the specified child window's parent window.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetParent(Handle: HWND): HWND;
Begin
Result := Windows.GetParent(Handle);
End;
{------------------------------------------------------------------------------
Method: GetProp
Params: Handle - handle of window
Str - string
Returns: the associated data
Retrieves a pointer to data from the property list of the given window.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetProp(Handle: HWND; Str: PChar): Pointer;
Begin
Result := Pointer(Windows.GetProp(Handle, Str));
End;
{------------------------------------------------------------------------------
Method: GetROP2
Params: DC - Handle of the device context
Returns: 0 if unsuccessful, the current Foreground Mixing Mode if successul
Retrieves the current Foreground Mixing Mode in the given device context
------------------------------------------------------------------------------}
function TWin32WidgetSet.GetROP2(DC: HDC): Integer;
begin
Result := Windows.GetROP2(DC);
end;
{------------------------------------------------------------------------------
Method: GetScrollInfo
Params: Handle - handle of window with scroll bar
BarFlag - scroll bar flag
ScrollInfo - record for scroll parameters
Returns: If the function retrieved any values.
Retrieves the parameters of a scroll bar.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetScrollInfo(Handle: HWND; BarFlag: Integer; var ScrollInfo: TScrollInfo): Boolean;
Begin
ScrollInfo.cbSize:=sizeof(ScrollInfo);
Assert(False, 'Trace:TODO: [TWin32WidgetSet.GetScrollInfo]');
Result := Boolean(Windows.GetScrollInfo(Handle, BarFlag, @ScrollInfo));
End;
{------------------------------------------------------------------------------
Method: GetStockObject
Params: Value - type of stock object
Returns: a value identifying the logical object requested
Retrieves a handle to one of the predefined stock objects.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetStockObject(Value: Integer): LongInt;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.GetStockObject] %d ', [Value]));
Result := Windows.GetStockObject(Value);
Assert(False, Format('Trace:< [TWin32WidgetSet.GetStockObject] %d --> 0x%x', [Value, Result]));
End;
{------------------------------------------------------------------------------
Method: GetSysColor
Params: NIndex - display element whose color is to be retrieved
Returns: RGB value
Retrieves the current color of the specified display element.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetSysColor(NIndex: Integer): DWORD;
Begin
if NIndex = COLOR_FORM then
NIndex := COLOR_BTNFACE;
Result := Windows.GetSysColor(nIndex);
End;
{------------------------------------------------------------------------------
Method: GetSystemMetrics
Params: NIndex - system metric to retrieve
Returns: the requested system metric
Retrieves various system metrics.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetSystemMetrics(NIndex: Integer): Integer;
Begin
Assert(False, Format('Trace:[TWin32WidgetSet.GetSystemMetrics] %s', [IntToStr(NIndex)]));
Result := Windows.GetSystemMetrics(NIndex);
Assert(False, Format('Trace:[TWin32WidgetSet.GetSystemMetrics] %s --> 0x%S (%s)', [IntToStr(NIndex), IntToHex(Result, 8), IntToStr(Result)]));
End;
Function TWin32WidgetSet.GetTextColor(DC: HDC): TColorRef;
Begin
Result := Windows.GetTextColor(DC);
End;
{------------------------------------------------------------------------------
Method: GetTextExtentPoint
Params: DC - handle of device context
Str - text string
Count - number of characters in string
Size - TSize record in which the dimensions of the string are to be
returned
Returns: If the function succeeded
Computes the width and height of the specified string of text.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetTextExtentPoint(DC: HDC; Str: PChar; Count: Integer; Var Size: TSize): Boolean;
Begin
Assert(False, 'Trace:[TWin32WidgetSet.GetTextExtentPoint] - Start');
Result := Boolean(Windows.GetTextExtentPoint32(DC, Str, Count, @Size));
Assert(False, 'Trace:[TWin32WidgetSet.GetTextExtentPoint] - Exit');
End;
{------------------------------------------------------------------------------
Method: GetTextMetrics
Params: DC - handle of device context
TM - text metrics record
Returns: If the function succeeds
Fills the specified buffer with the metrics for the currently selected font.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetTextMetrics(DC: HDC; Var TM: TTextMetric): Boolean;
Begin
Assert(False, Format('Trace:> TODO FINISH[TWin32WidgetSet.GetTextMetrics] DC: 0x%x', [DC]));
Result := Boolean(Windows.GetTextMetrics(DC, @TM));
Assert(False, Format('Trace:< TODO FINISH[TWin32WidgetSet.GetTextMetrics] DC: 0x%x', [DC]));
End;
{------------------------------------------------------------------------------
Method: GetWindowLong
Params: Handle - handle of window
Int - value to retrieve
Returns: the requested 32-bit value
Retrieves information about the specified window.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetWindowLong(Handle: HWND; Int: Integer): PtrInt;
Begin
//TODO:Started but not finished
Assert(False, Format('Trace:> [TWin32WidgetSet.GETWINDOWLONG] HWND: 0x%x, int: 0x%x (%d)', [Handle, int, int]));
Result := Windows.GetWindowLong(Handle, int);
Assert(False, Format('Trace:< [TWin32WidgetSet.GETWINDOWLONG] HWND: 0x%x, int: 0x%x (%d) --> 0x%x (%d)', [Handle, int, int, Result, Result]));
End;
{------------------------------------------------------------------------------
Method: GetWindowOrgEx
Params: DC - handle of device context
P - record receiving the window origin
Returns: 0 if the function fails; non-zero integer otherwise
Retrieves the x-coordinates and y-coordinates of the window origin for the
specified device context.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetWindowOrgEx(DC: HDC; P: PPoint): Integer;
Begin
Result := Integer(Windows.GetWindowOrgEx(DC, LPPoint(P)));
End;
{------------------------------------------------------------------------------
Method: GetWindowRect
Params: Handle - handle of window
Rect - record for window coordinates
Returns: if the function succeeds, the return value is nonzero; if the
function fails, the return value is zero
Retrieves the dimensions of the bounding rectangle of the specified window.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetWindowRect(Handle: HWND; Var Rect: TRect): Integer;
Begin
Result := Integer(Windows.GetWindowRect(Handle, @Rect));
End;
{------------------------------------------------------------------------------
Function: GetWindowRelativePosition
Params: Handle : HWND;
Returns: true on success
returns the current widget Left, Top, relative to the client origin of its
parent
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetWindowRelativePosition(Handle : HWND;
var Left, Top:integer): boolean;
var
LeftTop:TPoint;
R: TRect;
ParentHandle: THandle;
WindowInfo: PWindowInfo;
begin
Result:=false;
WindowInfo := GetWindowInfo(Handle);
if (WindowInfo^.WinControl is TCustomSpinEdit) then
Handle := Windows.SendMessage(Handle, UDM_GETBUDDY, 0, 0);
if not Windows.GetWindowRect(Handle,@R) then exit;
LeftTop.X:=R.Left;
LeftTop.Y:=R.Top;
ParentHandle:=Windows.GetParent(Handle);
if ParentHandle<>0 then
begin
if not Windows.ScreenToClient(ParentHandle,@LeftTop) then exit;
if not GetLCLClientBoundsOffset(ParentHandle, R) then
exit;
dec(LeftTop.X, R.Left);
dec(LeftTop.Y, R.Top);
end;
Left:=LeftTop.X;
Top:=LeftTop.Y;
Result:=true;
end;
{------------------------------------------------------------------------------
Function: GetWindowSize
Params: Handle : hwnd;
Returns: true on success
Returns the current widget Width and Height
------------------------------------------------------------------------------}
Function TWin32WidgetSet.GetWindowSize(Handle : hwnd;
var Width, Height: integer): boolean;
var
WP: WINDOWPLACEMENT;
R: TRect;
Style, ExStyle: LongInt;
WindowInfo: PWindowInfo;
procedure AdjustForBuddySize;
var
BuddyWidth, BuddyHeight: integer;
begin
GetWindowSize(Windows.SendMessage(Handle, UDM_GETBUDDY, 0, 0), BuddyWidth, BuddyHeight);
Inc(Width, BuddyWidth);
end;
begin
WP.length := SizeOf(WP);
Result := Boolean(Windows.GetWindowPlacement(Handle, WP));
if (WP.showCmd=SW_MAXIMIZE) then begin
// if the form is maximized, you can't use the normal size
Result := Boolean(Windows.GetWindowRect(Handle,@R));
with R Do
begin
Width := Right - Left;
Height := Bottom - Top;
end;
end
else
with WP.rcNormalPosition do
begin
Width := Right - Left;
Height := Bottom - Top;
end;
// convert top level lcl window coordinaties to win32 coord
Style := Windows.GetWindowLong(Handle, GWL_STYLE);
ExStyle := Windows.GetWindowLong(Handle, GWL_EXSTYLE);
if (Style and WS_THICKFRAME) <> 0 then
begin
// thick, sizing border
// add twice, top+bottom border
Dec(Width, 2*Windows.GetSystemMetrics(SM_CXSIZEFRAME));
Dec(Height, 2*Windows.GetSystemMetrics(SM_CYSIZEFRAME));
end else
if (Style and WS_BORDER) <> 0 then
begin
// thin, non-sizing border
Dec(Width, 2*Windows.GetSystemMetrics(SM_CXFIXEDFRAME));
Dec(Height, 2*Windows.GetSystemMetrics(SM_CYFIXEDFRAME));
end;
if (Style and WS_CAPTION) <> 0 then
if (ExStyle and WS_EX_TOOLWINDOW) <> 0 then
Dec(Height, Windows.GetSystemMetrics(SM_CYSMCAPTION))
else
Dec(Height, Windows.GetSystemMetrics(SM_CYCAPTION));
WindowInfo := GetWindowInfo(Handle);
if (WindowInfo^.WinControl is TCustomSpinEdit) then
AdjustForBuddySize;
end;
{------------------------------------------------------------------------------
Method: HideCaret
Params: HWnd - handle to the window with the caret
Returns: Whether the window owns the caret
Removes the caret from the screen.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.HideCaret(HWnd: HWND): Boolean;
Begin
Assert(False, Format('Trace: [TWin32WidgetSet.HideCaret] HWND: 0x%x', [HWnd]));
Result := Boolean(Windows.HideCaret(hWnd));
End;
{------------------------------------------------------------------------------
Method: InvalidateRect
Params: AHandle - handle of window with changed update region
Rect - address of rectangle coordinates
BErase - specifies whether the background is to be erased
Returns: if the function succeeds
Adds a rectangle to the specified window's update region.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.InvalidateRect(aHandle: HWND; Rect: PRect; BErase: Boolean): Boolean;
Var
Flags: UINT;
ORect: TRect;
Begin
// Result := Windows.InvalidateRect(aHandle, Windows.RECT(Rect^), bErase);
Flags := RDW_INVALIDATE or RDW_ALLCHILDREN;
if BErase then
Flags := Flags or RDW_ERASE;
GetLCLClientBoundsOffset(aHandle, ORect);
OffsetRect(Rect^, ORect.Left, ORect.Top);
Result := Boolean(Windows.RedrawWindow(aHandle, Windows.RECT(Rect^), 0, Flags));
End;
{------------------------------------------------------------------------------
Function: IntersectClipRect
Params: dc, Left, Top, Right, Bottom
Returns: Integer
Shrinks the clipping region in the device context dc to a region of all
intersecting points between the boundary defined by Left, Top, Right,
Bottom , and the Current clipping region.
The result can be one of the following constants
Error
NullRegion
SimpleRegion
ComplexRegion
------------------------------------------------------------------------------}
function TWin32WidgetSet.IntersectClipRect(dc: hdc;
Left, Top, Right, Bottom: Integer): Integer;
begin
Result := Windows.IntersectClipRect(DC, Left, Top, Right, Bottom);
end;
{------------------------------------------------------------------------------
Method: IsWindowEnabled
Params: handle - window handle
Returns: true if window is enabled, false otherwise
------------------------------------------------------------------------------}
function TWin32WidgetSet.IsWindowEnabled(handle: HWND): boolean;
begin
Result := Boolean(Windows.IsWindowEnabled(handle));
end;
{------------------------------------------------------------------------------
Method: IsWindowVisible
Params: handle - window handle
Returns: true if window is visible, false otherwise
------------------------------------------------------------------------------}
function TWin32WidgetSet.IsWindowVisible(handle: HWND): boolean;
begin
Result := Boolean(Windows.IsWindowVisible(handle));
end;
{------------------------------------------------------------------------------
Method: LineTo
Params: DC - device context handle
X - x-coordinate of line's ending point
Y - y-coordinate of line's ending point
Returns: if the function succeeds
Draws a line from the current position up to, but not including, the specified point.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.LineTo(DC: HDC; X, Y: Integer): Boolean;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.LineTo] DC:0x%x, X:%d, Y:%d', [DC, X, Y]));
Result := Boolean(Windows.LineTo(DC, X, Y));
Assert(False, Format('Trace:< [TWin32WidgetSet.LineTo] DC:0x%x, X:%d, Y:%d', [DC, X, Y]));
End;
{------------------------------------------------------------------------------
Method: MaskBlt
Params: DestDC - The destination device context
X, Y - The left/top corner of the destination rectangle
Width, Height - The size of the destination rectangle
SrcDC - The source device context
XSrc, YSrc - The left/top corner of the source rectangle
Mask - The handle of a monochrome bitmap
XMask, YMask - The left/top corner of the mask rectangle
Rop - The raster operation to be performed
Returns: True if succesful
The MaskBlt Function copies a bitmap from a source context into a destination
context using the specified mask and raster operation.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.MaskBlt(DestDC: HDC; X, Y, Width, Height: Integer; SrcDC: HDC; XSrc, YSrc: Integer; Mask: HBITMAP; XMask, YMask: Integer; Rop: DWORD): Boolean;
Begin
Result := Boolean(Windows.MaskBlt(DestDC, X, Y, Width, Height, SrcDC, XSrc, YSrc, Mask, XMask, YMask, Rop));
End;
Function TWin32WidgetSet.MaskBlt(DestDC: HDC; X, Y, Width, Height: Integer; SrcDC: HDC; XSrc, YSrc: Integer; Mask: HBITMAP; XMask, YMask: Integer): Boolean;
begin
Result := StretchMaskBlt(DestDC, X, Y, Width, Height, SrcDC, XSrc, YSrc, Width, Height, Mask, XMask, YMask, SRCCOPY);
end;
{------------------------------------------------------------------------------
Method: MessageBox
Params: HWnd - The handle of parent window
LPText - text in message box
LPCaption - title of message box
UType - style of message box
Returns: 0 if not successful (out of memory), otherwise one of the defined
values:
IDABORT
IDCANCEL
IDIGNORE
IDNO
IDOK
IDRETRY
IDYES
The MessageBox function displays a modal dialog, with text and caption defined,
and includes buttons.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.MessageBox(HWnd: HWND; LPText, LPCaption: PChar; UType: Cardinal): Integer;
Begin
Result := Windows.MessageBox(HWnd, LPText, LPCaption, UType);
End;
{------------------------------------------------------------------------------
Method: MoveToEx
Params: DC - handle of device context
X - x-coordinate of new current position
Y - x-coordinate of new current position
OldPoint - address of old current position
Returns: If the function succeeds.
Updates the current position to the specified point.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.MoveToEx(DC: HDC; X, Y: Integer; OldPoint: PPoint): Boolean;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.MoveToEx] DC:0x%x, X:%d, Y:%d', [DC, X, Y]));
Result := Boolean(Windows.MoveToEx(DC, X, Y, LPPOINT(OldPoint)));
Assert(False, Format('Trace:< [TWin32WidgetSet.MoveToEx] DC:0x%x, X:%d, Y:%d', [DC, X, Y]));
End;
{------------------------------------------------------------------------------
Method: PeekMessage
Params: LPMsg - Where it should put the message
Handle - Handle of the window (thread)
WMsgFilterMin - Lowest MSG to grab
WMsgFilterMax - Highest MSG to grab
WRemoveMsg - Should message be pulled out of the queue
Returns: Boolean if an event was there
Checks a thread message queue for a message.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.PeekMessage(Var LPMsg: TMsg; Handle: HWND; WMsgFilterMin, WMsgFilterMax, WRemoveMsg: UINT): Boolean;
Begin
Result := Boolean(Windows.PeekMessage(@LPMsg, Handle, WMsgFilterMin, WMsgFilterMax, WRemoveMsg));
End;
{------------------------------------------------------------------------------
Method: PolyBezier
Params: DC, Points, NumPts, Filled, Continous
Returns: Boolean
Use Polybezier to draw cubic B<>zier curves. The first curve is drawn from the
first point to the fourth point with the second and third points being the
control points. If the Continuous flag is TRUE then each subsequent curve
requires three more points, using the end-point of the previous Curve as its
starting point, the first and second points being used as its control points,
and the third point its end-point. If the continous flag is set to FALSE,
then each subsequent Curve requires 4 additional points, which are used
excatly as in the first curve. Any additonal points which do not add up to
a full bezier(4 for Continuous, 3 otherwise) are ingored. There must be at
least 4 points for an drawing to occur. If the Filled Flag is set to TRUE
then the resulting Poly-B<>zier will be drawn as a Polygon.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.PolyBezier(DC: HDC; Points: PPoint; NumPts: Integer;
Filled, Continuous: Boolean): Boolean;
Begin
If Filled or (not Continuous) then
Result := Inherited PolyBezier(DC,Points,NumPts, Filled, Continuous)
else
Result := Boolean(Windows.PolyBezier(DC, LPPOINT(Points)^, NumPts));
End;
{------------------------------------------------------------------------------
Method: Polygon
Params: DC - handle to device context
Points - pointer to polygon's vertices
NumPts - count of polygon's vertices
Winding
Returns: If the function succeeds
Use Polygon to draw a closed, many-sided shape on the canvas, using the value
of Pen. After drawing the complete shape, Polygon fills the shape using the
value of Brush.
The Points parameter is an array of points that give the vertices of the
polygon.
Winding determines how the polygon is filled.
When Winding is True, Polygon
fills the shape using the Winding fill algorithm. When Winding is False,
Polygon uses the even-odd (alternative) fill algorithm.
NumPts indicates the number of points to use.
The first point is always connected to the last point.
To draw a polygon on the canvas, without filling it, use the Polyline method,
specifying the first point a second time at the end.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.Polygon(DC: HDC; Points: PPoint; NumPts: Integer; Winding: Boolean): Boolean;
var
PFMode : Longint;
Begin
Assert(False, Format('Trace:TWin32WidgetSet.Polygon --> DC: 0x%X, Number of points: %D, Use winding fill: %S', [DC, NumPts, BOOL_RESULT[Winding]]));
If Winding then
PFMode := SetPolyFillMode(DC, Windows.WINDING)
else
PFMode := SetPolyFillMode(DC, Windows.ALTERNATE);
Result := Boolean(Windows.Polygon(DC, LPPOINT(Points)^, NumPts));
SetPolyFillMode(DC, PFMode);
End;
{------------------------------------------------------------------------------
Method: Polyline
Params: DC - handle of device context
Points - address of array containing endpoints
NumPts - number of points in the array
Returns: If the function succeeds
Draws a series of line segments by connecting the points in the specified
array.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.Polyline(DC: HDC; Points: PPoint; NumPts: Integer): Boolean;
Begin
Result := Boolean(Windows.Polyline(DC, LPPOINT(Points)^, NumPts));
End;
{------------------------------------------------------------------------------
Method: PostMessage
Params: Handle - handle of destination window
Msg - message to post
WParam - first message parameter
LParam - second message parameter
Returns: True if succesful
The PostMessage Function places (posts) a message in the message queue and
then returns without waiting.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.PostMessage(Handle: HWND; Msg: Cardinal; WParam: WParam; LParam: LParam): Boolean;
Begin
Result := Boolean(Windows.PostMessage(Handle, Msg, WParam, LParam));
End;
{------------------------------------------------------------------------------
Method: RadialArc
Params: DC,x,y,width,height,sx,sy,ex,ey
Returns: Nothing
Use RadialArc to draw an elliptically curved line with the current Pen. The
values sx,sy, and ex,ey represent the starting and ending radial-points
between which the Arc is drawn.
------------------------------------------------------------------------------}
function TWin32WidgetSet.RadialArc(DC: HDC; x,y,width,height,sx,sy,ex,ey : Integer): Boolean;
Begin
Result := Boolean(Windows.Arc(DC, X, Y, X+Width, Y+Height, SX, SY, EX, EY));
End;
{------------------------------------------------------------------------------
Method: RadialChord
Params: DC,x,y,width,height,sx,sy,ex,ey
Returns: Nothing
Use RadialChord to draw a filled Chord-shape on the canvas. The values sx,sy,
and ex,ey represent the starting and ending radial-points between which
the bounding-Arc is drawn.
------------------------------------------------------------------------------}
function TWin32WidgetSet.RadialChord(DC: HDC; x,y,width,height,sx,sy,ex,ey : Integer): Boolean;
Begin
Result := Boolean(Windows.Chord(DC, X, Y, X+Width, Y+Height, SX, SY, EX, EY));
End;
{------------------------------------------------------------------------------
Method: RadialPie
Params: DC,x,y,width,height,sx,sy,ex,ey
Returns: Nothing
Use RadialPie to draw a filled Pie-shaped Wedge on the canvas. The values
sx,sy, and ex,ey represent the starting and ending radial-points between which
the bounding-Arc is drawn.
------------------------------------------------------------------------------}
function TWin32WidgetSet.RadialPie(DC: HDC; x,y,width,height,sx,sy,ex,ey : Integer): Boolean;
Begin
Result := Boolean(Windows.Pie(DC, X, Y, X+Width, Y+Height, SX, SY, EX, EY));
End;
{------------------------------------------------------------------------------
Method: RealizePalette
Params: DC - handle of device context
Returns: number of entries in the logical palette mapped to the system
palette
Maps palette entries from the current logical palette to the system palette.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.RealizePalette(DC: HDC): Cardinal;
Begin
Assert(False, 'Trace:TODO: [TWin32WidgetSet.RealizePalette]');
//TODO: Implement this;
Result := Windows.RealizePalette(DC);
End;
{------------------------------------------------------------------------------
Method: Rectangle
Params: DC - handle of device context
X1 - x-coordinate of bounding rectangle's upper-left corner
Y1 - y-coordinate of bounding rectangle's upper-left corner
X2 - x-coordinate of bounding rectangle's lower-right corner
Y2 - y-coordinate of bounding rectangle's lower-right corner
Returns: If the function succeeds
The Rectangle function draws a rectangle. The rectangle is outlined by using
the current pen and filled by using the current brush.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.Rectangle(DC: HDC; X1, Y1, X2, Y2: Integer): Boolean;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.Rectangle] DC:0x%x, X1:%d, Y1:%d, X2:%d, Y2:%d', [DC, X1, Y1, X2, Y2]));
Result := Boolean(Windows.Rectangle(DC, X1, Y1, X2+1, Y2+1));
Assert(False, Format('Trace:< [TWin32WidgetSet.Rectangle] DC:0x%x, X1:%d, Y1:%d, X2:%d, Y2:%d', [DC, X1, Y1, X2, Y2]));
End;
function TWin32WidgetSet.RectVisible(dc : hdc; const ARect: TRect) : Boolean;
begin
Result := Boolean(Windows.RectVisible(DC, LPRECT(@ARect)^));
end;
{------------------------------------------------------------------------------
Function: RemoveProp
Params: Handle: Handle of the object
Str: Name of the property to remove
Returns: The handle of the property (0=failure)
------------------------------------------------------------------------------}
function TWin32WidgetSet.RemoveProp(Handle: hwnd; Str: PChar): THandle;
begin
Result := Windows.RemoveProp(Handle, Str);
end;
{------------------------------------------------------------------------------
Method: ReleaseCapture
Params: none
Returns: True if succesful
The ReleaseCapture Function releases the mouse capture from a window
and restores normal mouse input processing.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ReleaseCapture: Boolean;
Begin
Result := Boolean(Windows.ReleaseCapture);
End;
{------------------------------------------------------------------------------
Method: ReleaseDC
Params: HWnd - handle of window
DC - handle of device context
Returns: 1 if the device context was released or 0 if it wasn't
Releases a device context (DC), freeing it for use by other applications.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ReleaseDC(Window: HWND; DC: HDC): Integer;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.ReleaseDC] DC:0x%x', [DC]));
Result := Windows.ReleaseDC(Window, DC);
Assert(False, Format('Trace:< [TWin32WidgetSet.ReleaseDC] DC:0x%x', [DC]));
End;
Function TWin32WidgetSet.ReleaseDesignerDC(Window: HWND; DC: HDC): Integer;
var
OverlayWindow: HWND;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.ReleaseDC] DC:0x%x', [DC]));
OverlayWindow := GetWindowInfo(Window)^.Overlay;
if OverlayWindow <> HWND(nil) then
Result := Windows.ReleaseDC(OverlayWindow, DC);
Assert(False, Format('Trace:< [TWin32WidgetSet.ReleaseDC] DC:0x%x', [DC]));
End;
{------------------------------------------------------------------------------
Method: RestoreDC
Params: DC - handle of device context
SavedDC - state to be restored
Returns: if the function succeeds
Restores a device context (DC) to the specified state.
-------------------------------------------------------------------------------}
Function TWin32WidgetSet.RestoreDC(DC: HDC; SavedDC: Integer): Boolean;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.RestoreDC] DC:0x%x, SavedDC: %d', [DC, SavedDC]));
Result := Boolean(Windows.RestoreDC(DC, SavedDC));
Assert(False, Format('Trace:< [TWin32WidgetSet.RestoreDC] DC:0x%x, Saved: %d --> %s', [Integer(DC), SavedDC, BOOL_TEXT[Result]]));
End;
{------------------------------------------------------------------------------
Method: SaveDC
Params: DC - a DC to save
Returns: 0 if the functions fails otherwise a positive integer identifing
the saved DC
The SaveDC function saves the current state of the specified device
context (DC) by copying its elements to a context stack.
-------------------------------------------------------------------------------}
Function TWin32WidgetSet.SaveDC(DC: HDC): Integer;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.SaveDC] 0x%x', [Integer(DC)]));
Result := Windows.SaveDC(DC);
Assert(False, Format('Trace:< [TWin32WidgetSet.SaveDC] 0x%x --> %d', [Integer(DC), Result]));
End;
{------------------------------------------------------------------------------
Method: ScreenToClient
Params: Handle - window handle for source coordinates
P - record containing coordinates
Returns: if the function succeeds, the return value is nonzero; if the
function fails, the return value is zero
Converts the screen coordinates of a specified point on the screen to client
coordinates.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ScreenToClient(Handle: HWND; Var P: TPoint): Integer;
Begin
Result := Integer(Windows.ScreenToClient(Handle, @P));
End;
{------------------------------------------------------------------------------
Method: ScrollWindowEx
Params: HWnd - handle of window to scroll
DX - horizontal amount to scroll
DY - vertical amount to scroll
PRcScroll - pointer to scroll rectangle
PRcClip - pointer to clip rectangle
HRgnUpdate - handle of update region
PRcUpdate - pointer to update rectangle
Flags - scrolling flags
Returns: True if succesfull
The ScrollWindowEx function scrolls the content of the specified window's
client area
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ScrollWindowEx(HWnd: HWND; DX, DY: Integer; PRcScroll, PRcClip: PRect; HRgnUpdate: HRGN; PRcUpdate: PRect; Flags: UINT): Boolean;
Begin
Result := Windows.ScrollWindowEx(HWnd, DX, DY, Windows.RECT(PRcScroll^), Windows.RECT(PRcClip^), HRgnUpdate, LPRECT(PRcUpdate), Flags) <> ERROR;
End;
{------------------------------------------------------------------------------
Function: SelectClipRGN
Params: DC, RGN
Returns: longint
Sets the DeviceContext's ClipRegion. The Return value
is the new clip regions type, or ERROR.
The result can be one of the following constants
Error
NullRegion
SimpleRegion
ComplexRegion
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SelectClipRGN(DC : hDC; RGN : HRGN) : Longint;
begin
Result := Windows.SelectClipRGN(DC, RGN);
end;
{------------------------------------------------------------------------------
Method: SelectObject
Params: DC - handle of device context
GDIObj - handle of object
Returns: he handle of the object being replaced
Selects an object into the specified device context.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SelectObject(DC: HDC; GDIObj: HGDIOBJ): HGDIOBJ;
Begin
//TODO: Finish this;
Assert(False, Format('Trace:> [TWin32WidgetSet.SelectObject] DC: 0x%x', [DC]));
Result := Windows.SelectObject(DC, GDIObj);
Assert(False, Format('Trace:< [TWin32WidgetSet.SelectObject] DC: 0x%x --> 0x%x', [DC, Result]));
End;
{------------------------------------------------------------------------------
Method: SelectPalette
Params: DC - handle of device context
Palette - handle of logical color palette
ForceBackground - whether the logical palette is forced to be a
background palette
Returns: the device context's previous logical palette
Selects the specified logical palette into a device context.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SelectPalette(DC: HDC; Palette: HPALETTE; ForceBackground: Boolean): HPALETTE;
Begin
Assert(False, 'Trace:TODO: [TWin32WidgetSet.SelectPalette]');
//TODO: Implement this;
Result := Windows.SelectPalette(DC, Palette, ForceBackground);
End;
{------------------------------------------------------------------------------
Method: SendMessage
Params: HandleWnd - handle of destination window
Msg - message to send
WParam - first message parameter
LParam - second message parameter
Returns: the result of the message processing
The SendMessage function sends the specified message to a window or windows.
The function calls the window procedure for the specified window and does
not return until the window procedure has processed the message.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SendMessage(HandleWnd: HWND; Msg: Cardinal; WParam: WParam; LParam: LParam): LResult;
Begin
Result := Windows.SendMessage(HandleWnd, Msg, WParam, LParam);
End;
{------------------------------------------------------------------------------
Method: SetActiveWindow
Params: Window - Window to focus
Returns: Old active window
Sets focus to the specified window, if the current process is on top
------------------------------------------------------------------------------}
function TWin32WidgetSet.SetActiveWindow(Window: HWND): HWND;
begin
Result := Windows.SetActiveWindow(Window);
end;
{------------------------------------------------------------------------------
Method: SetBkColor
Params: DC - Device context to change the text background color
Color - background color value
Returns: Old Background color
Sets the current background color to the specified color value.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetBKColor(DC: HDC; Color: TColorRef): TColorRef;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.SetBKColor] DC: 0x%x Color: %8x', [Integer(DC), Color]));
Result := Windows.SetBkColor(DC, Windows.COLORREF(ColorToRGB(Color)));
Assert(False, Format('Trace:< [TWin32WidgetSet.SetBKColor] DC: 0x%x Color: %8x --> %8x', [Integer(DC), Color, Result]));
End;
{------------------------------------------------------------------------------
Method: SetBkMode
Params: DC - handle of device context
BkMode - flag specifying background mode
Returns: the previous background mode
Sets the background mix mode of the specified device context.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetBkMode(DC: HDC; BkMode: Integer): Integer;
Begin
// Your code here
Result := Windows.SetBkMode(DC, BkMode);
End;
{------------------------------------------------------------------------------
Method: SetCapture
Params: Value - Handle of window to capture
Returns: the handle of the window that had previously captured the mouse
Sets the mouse capture to the specified window.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetCapture(Value: HWND): HWND;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.SetCapture] 0x%x', [Value]));
Result := Windows.SetCapture(Value);
Assert(False, Format('Trace:< [TWin32WidgetSet.SetCapture] 0x%x --> 0x%x', [Value, Result]));
End;
{------------------------------------------------------------------------------
Method: SetCaretPos
Params: new position x, y
Returns: true on success
Moves the caret to the specified coordinates.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetCaretPos(X, Y: Integer): Boolean;
Begin
Result := Boolean(Windows.SetCaretPos(X, Y));
End;
{------------------------------------------------------------------------------
Method: SetCaretPosEx
Params: Handle - handle of window
X - horizontal mouse coordinate
Y - vertical mouse coordinate
Returns: true on success
Moves the caret to the specified coordinates in the specified window.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetCaretPosEx(Handle: HWND; X, Y: Integer): Boolean;
Begin
Result := ShowCaret(Handle) And SetCaretPos(X, Y);
End;
{------------------------------------------------------------------------------
Method: SetCaretRespondToFocus
Params: Handle - Handle of a TWinControl
ShowHideOnFocus - true = caret is hidden on focus lost
Returns: true on success
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetCaretRespondToFocus(Handle: HWND; ShowHideOnFocus: Boolean): Boolean;
Begin
If ShowHideOnFocus Then
Result := ShowCaret(Handle)
Else
Result := HideCaret(Handle)
End;
{------------------------------------------------------------------------------
Function: SetCursorPos
Params: X:
Y:
Returns:
------------------------------------------------------------------------------}
function TWin32WidgetSet.SetCursorPos(X, Y: Integer): Boolean;
begin
Result := False;
Windows.SetCursorPos(X, Y);
Result := True;
end;
{------------------------------------------------------------------------------
Method: SetFocus
Params: HWnd - Handle of new focus window
Returns: The old focus window
The SetFocus function sets the keyboard focus to the specified window
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetFocus(HWnd: HWND): HWND;
Begin
Result := Windows.SetFocus(HWnd);
End;
{------------------------------------------------------------------------------
Method: SetProp
Params: Handle - handle of window
Str - string
Data - pointer to data
Returns: Whether the string and data were successfully added to the property
list.
Adds a new entry or changes an existing entry in the property list of the
specified window.
NOTE: LCLLinux has no RemoveProp function but Windows API requires all set
properties to be removed, so I'm keeping a list of windows with properties
for a properties-enumeration function that's called when the program is quit.
MWE: that is not really needed anymore since the RemoveProp is now implemented
------------------------------------------------------------------------------}
function TWin32WidgetSet.SetProp(Handle: HWND; Str: PChar; Data: Pointer): Boolean;
begin
Assert(False, 'Trace:TWin32WidgetSet.SetProp - Start');
Result := Boolean(Windows.SetProp(Handle, Str, Windows.HANDLE(Data)));
Assert(False, Format('Trace:TWin32WidgetSet.SetProp --> Window handle: 0x%X, Propery to set: %S, Data to set: 0x%P, Property was successfully set: %S', [Handle, String(Str), Data, BOOL_RESULT[Result]]));
End;
{------------------------------------------------------------------------------
Method: SetROP2
Params: DC - Device Context
Mode - Foreground mixing mode
Returns: 0 if unsuccessful or the old Mode if successful
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetROP2(DC: HDC; Mode: Integer): Integer;
begin
result := Windows.SetROP2(DC, Mode);
end;
{------------------------------------------------------------------------------
Method: SetScrollInfo
Params: Handle - handle of window with scroll bar
SBStyle - scroll bar flag
ScrollInfo - record with scroll parameters
BRedraw - is the scroll bar is redrawn?
Returns: The old position value
Sets the parameters of a scroll bar.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetScrollInfo(Handle: HWND; SBStyle: Integer; ScrollInfo: TScrollInfo; BRedraw: Boolean): Integer;
Begin
// Assert(False, 'Trace:[TWin32WidgetSet.SetScrollInfo]');
//With ScrollInfo Do
// Assert(False, Format('Trace:> [TWin32WidgetSet.SetScrollInfo] Mask:0x%x, Min:%d, Max:%d, Page:%d, Pos:%d', [FMask, NMin, NMax, NPage, NPos]));
ScrollInfo.cbSize:=sizeof(ScrollInfo);
Result := Windows.SetScrollInfo(Handle, SBStyle, @ScrollInfo, BRedraw);
With ScrollInfo Do
Assert(False, Format('Trace:> [TWin32WidgetSet.SetScrollInfo] --> %d', [Result]));
End;
{------------------------------------------------------------------------------
Method: SetSysColors
Params: CElements - the number of elements
LPAElements - array with element numbers
LPARGBValues - array with colors
Returns: 0 if unsuccesful
The SetSysColors function sets the colors for one or more display elements.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetSysColors(CElements: Integer; Const LPAElements; Const LPARGBValues): Boolean;
Begin
Result := Boolean(Windows.SetSysColors(CElements, PInteger(@LPAElements)^, LPColorRef(@LPARGBValues)^));
End;
{------------------------------------------------------------------------------
Method: SetTextCharacterExtra
Params: _HDC - handle of device context
NCharExtra - extra-space value
Returns: the previous intercharacter spacing
Sets the intercharacter spacing.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetTextCharacterExtra(_HDC: HDC; NCharExtra: Integer): Integer;
Begin
// Your code here
Result := Windows.SetTextCharacterExtra(_HDC, NCharExtra);
End;
{------------------------------------------------------------------------------
Method: SetTextColor
Params: DC - Identifies the device context.
Color - Specifies the color of the text.
Returns: The previous color if succesful, CLR_INVALID otherwise
The SetTextColor function sets the text color for the specified device
context to the specified color.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetTextColor(DC: HDC; Color: TColorRef): TColorRef;
Begin
Assert(False, Format('Trace:> [TWin32WidgetSet.SetTextColor] DC: 0x%x Color: %8x', [Integer(DC), Color]));
Result := Windows.SetTextColor(DC, Windows.COLORREF(ColorToRGB(Color)));
Assert(False, Format('Trace:< [TWin32WidgetSet.SetTextColor] DC: 0x%x Color: %8x --> %8x', [Integer(DC), Color, Result]));
End;
{------------------------------------------------------------------------------
Procedure: SetWindowLong
Params: Handle - handle of window
Idx - value to set
NewLong - new value
Returns: Nothing
Changes an attribute of the specified window.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetWindowLong(Handle: HWND; Idx: Integer; NewLong: PtrInt): PtrInt;
Begin
//TODO: Finish this;
Assert(False, Format('Trace:> [TWin32WidgetSet.SETWINDOWLONG] HWND: 0x%x, Idx: 0x%x(%d), Value: 0x%x(%d)', [Handle, Idx, Idx, NewLong, NewLong]));
Result := Windows.SetWindowLong(Handle, Idx, NewLong);
Assert(False, Format('Trace:< [TWin32WidgetSet.SETWINDOWLONG] HWND: 0x%x, Idx: 0x%x(%d), Value: 0x%x(%d) --> 0x%x(%d)', [Handle, Idx, Idx, NewLong, NewLong, Result, Result]));
End;
{------------------------------------------------------------------------------
Method: SetWindowOrgEx
Params: DC - handle of device context
NewX - new x-coordinate of window origin
NewY - new y-coordinate of window origin
Point - record receiving original origin
Returns: Whether the call was successful
Sets the window origin of the device context by using the specified coordinates.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetWindowOrgEx(DC: HDC; NewX, NewY: Integer;
OldPoint: PPoint): Boolean;
Begin
Result := Boolean(Windows.SetWindowOrgEx(DC, NewX, NewY, LPPoint(OldPoint)));
End;
{------------------------------------------------------------------------------
Method: SetWindowPos
Params: HWnd - handle of window
HWndInsertAfter - placement-order handle
X - horizontal position
Y - vertical position
CX - width
CY - height
UFlags - window-positioning flags
Returns: If the function succeeds
Changes the size, position, and Z order of a child, pop-up, or top-level
window.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.SetWindowPos(HWnd: HWND; HWndInsertAfter: HWND; X, Y, CX, CY: Integer; UFlags: UINT): Boolean;
var
Style, ExStyle: Integer;
OldRect, OldClientRect: Windows.RECT;
Begin
//writeln('[TWin32WidgetSet.SetWindowPos] Top=',HWndInsertAfter=HWND_TOP);
Style := Windows.GetWindowLong(HWnd, GWL_STYLE);
ExStyle := Windows.GetWindowLong(HWnd, GWL_EXSTYLE);
Windows.GetWindowRect(HWnd, @OldRect);
Windows.GetClientRect(HWnd, @OldClientRect);
if (Style and WS_BORDER) <> 0 then
begin
// convert top level lcl window coordinaties to win32 coord
// add twice, top+bottom border
Inc(CX, 2*Windows.GetSystemMetrics(SM_CXSIZEFRAME));
Inc(CY, 2*Windows.GetSystemMetrics(SM_CYSIZEFRAME));
end;
if (Style and WS_CAPTION) <> 0 then
if (ExStyle and WS_EX_TOOLWINDOW) <> 0 then
Inc(CY, Windows.GetSystemMetrics(SM_CYSMCAPTION))
else
Inc(CY, Windows.GetSystemMetrics(SM_CYCAPTION));
Result := Boolean(Windows.SetWindowPos(HWnd, HWndInsertAfter, X, Y, CX, CY, UFlags));
End;
{------------------------------------------------------------------------------
Method: ShowCaret
Params: HWnd - handle of window with caret
Returns: if the function succeeds
Makes the caret visible on the screen at the caret's current position.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ShowCaret(HWnd: HWND): Boolean;
Begin
//writeln('[TWin32WidgetSet.ShowCaret] A');
Assert(False, Format('Trace:> [TWin32WidgetSet.ShowCaret] HWND: 0x%x', [HWnd]));
Result := Boolean(Windows.ShowCaret(HWnd));
Assert(False, Format('Trace:< [TWin32WidgetSet.ShowCaret] HWND: 0x%x --> %s', [HWnd, BOOL_TEXT[Result]]));
End;
{------------------------------------------------------------------------------
Method: ShowScrollBar
Params: Handle - handle of window with scroll bar
WBar - scroll bar flag
BShow - is the scroll bar visible?
Returns: If the function succeeds
Shows or hides the specified scroll bar.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ShowScrollBar(Handle: HWND; WBar: Integer; BShow: Boolean): Boolean;
Begin
Assert(False, 'Trace:[TWin32WidgetSet.ShowScrollBar]');
Result := Boolean(Windows.ShowScrollBar(Handle, WBar, BShow));
End;
{------------------------------------------------------------------------------
Method: ShowWindow
Params: hWnd - Window handle
nCmdShow - (SW_SHOWNORMAL, SW_MINIMIZE, SW_SHOWMAXIMIZED)
Returns: If the function succeeds
------------------------------------------------------------------------------}
Function TWin32WidgetSet.ShowWindow(hWnd: HWND; nCmdShow: Integer): Boolean;
begin
Result := Boolean(Windows.ShowWindow(hWnd, nCmdShow));
end;
{------------------------------------------------------------------------------
Method: StretchBlt
Params: DestDC - The destination device context
X, Y - The left/top corner of the destination rectangle
Width, Height - The size of the destination rectangle
SrcDC - The source device context
XSrc, YSrc - The left/top corner of the source rectangle
SrcWidth, SrcHeight - The size of the source rectangle
Rop - The raster operation to be performed
Returns: True if succesful
The StretchBlt function copies a bitmap from a source rectangle into a
destination rectangle using the specified raster operation. If needed it
resizes the bitmap to fit the dimensions of the destination rectangle.
Sizing is done according to the stretching mode currently set in the
destination device context.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.StretchBlt(DestDC: HDC; X, Y, Width, Height: Integer; SrcDC: HDC; XSrc, YSrc, SrcWidth, SrcHeight: Integer; Rop: Cardinal): Boolean;
Begin
Assert(True, Format('Trace:> [TWin32WidgetSet.StretchBlt] DestDC:0x%x; X:%d, Y:%d, Width:%d, Height:%d; SrcDC:0x%x; XSrc:%d, YSrc:%d, SrcWidth:%d, SrcHeight:%d; Rop:0x%x', [DestDC, X, Y, Width, Height, SrcDC, XSrc, YSrc, SrcWidth, SrcHeight, Rop]));
Result := Boolean(Windows.StretchBlt(DestDc, X, Y, Width, Height, SrcDC, XSrc, YSrc, SrcWidth, SrcHeight, Rop));
Assert(True, Format('Trace:< [TWin32WidgetSet.StretchBlt] DestDC:0x%x --> %s', [DestDC, BOOL_TEXT[Result]]));
End;
{------------------------------------------------------------------------------
Method: StretchMaskBlt
Params: DestDC: The destination devicecontext
X, Y: The left/top corner of the destination rectangle
Width, Height: The size of the destination rectangle
SrcDC: The source devicecontext
XSrc, YSrc: The left/top corner of the source rectangle
SrcWidth, SrcHeight: The size of the source rectangle
Mask: The handle of a monochrome bitmap
XMask, YMask: The left/top corner of the mask rectangle
Rop: The raster operation to be performed
Returns: True if succesful
The StretchMaskBlt function copies a bitmap from a source rectangle into a
destination rectangle using the specified mask and raster operations. If
needed it resizes the bitmap to fit the dimensions of the destination
rectangle. Sizing is done according to the stretching mode currently set in
the destination device context.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.StretchMaskBlt(DestDC: HDC; X, Y, Width, Height: Integer; SrcDC: HDC; XSrc, YSrc, SrcWidth, SrcHeight: Integer; Mask: HBITMAP; XMask, YMask: Integer; Rop: DWORD): Boolean;
Var
MaskDC: HDC;
SaveObj: HGDIOBJ;
PrevTextColor, PrevBkColor: COLORREF;
Begin
if Mask = 0 then
begin
if (Width = SrcWidth) and (Height = SrcHeight) then
begin
Result := BitBlt(DestDC, X, Y, Width, Height, SrcDC, XSrc, YSrc, SRCCOPY);
end else begin
Result := StretchBlt(DestDC, X, Y, Width, Height, SrcDC, XSrc, YSrc, SrcWidth, SrcHeight, SRCCOPY);
end;
end else begin
MaskDC := CreateCompatibleDC(0);
SaveObj := SelectObject(MaskDC, Mask);
PrevTextColor := Windows.SetTextColor(DestDC, RGB(255,255,255));
PrevBkColor := Windows.SetBkColor(DestDC, RGB(0,0,0));
if (Width = SrcWidth) and (Height = SrcHeight) then
begin
Windows.BitBlt(DestDC, X, Y, Width, Height, SrcDC, XSrc, YSrc, SRCINVERT);
Windows.BitBlt(DestDC, X, Y, Width, Height, MaskDC, XSrc, YSrc, SRCAND);
Windows.BitBlt(DestDC, X, Y, Width, Height, SrcDC, XSrc, YSrc, SRCINVERT);
end else begin
Windows.StretchBlt(DestDC, X, Y, Width, Height, SrcDC, XSrc, YSrc, SrcWidth, SrcHeight, SRCINVERT);
Windows.StretchBlt(DestDC, X, Y, Width, Height, MaskDC, XSrc, YSrc, SrcWidth, SrcHeight, SRCAND);
Windows.StretchBlt(DestDC, X, Y, Width, Height, SrcDC, XSrc, YSrc, SrcWidth, SrcHeight, SRCINVERT);
end;
Windows.SetTextColor(DestDC, PrevTextColor);
Windows.SetBkColor(DestDC, PrevBkColor);
SelectObject(MaskDC, SaveObj);
DeleteDC(MaskDC);
end;
Result := true;
end;
{------------------------------------------------------------------------------
Method: TextOut
Params: DC - handle of device context
X - x-coordinate of starting position
Y - y-coordinate of starting position
Str - string
Count - number of characters in string
Returns: If the function succeeds
Writes a character string at the specified location, using the currently
selected font.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.TextOut(DC: HDC; X, Y: Integer; Str: PChar; Count: Integer): Boolean;
Begin
Result := Boolean(Windows.TextOut(DC, X, Y, Str, Count));
End;
{------------------------------------------------------------------------------
Method: WindowFromPoint
Params: Point: Specifies the x and y Coords
Returns: The handle of the window.
Retrieves the handle of the window that contains the specified point.
------------------------------------------------------------------------------}
Function TWin32WidgetSet.WindowFromPoint(Point: TPoint): HWND;
Var
ProcessID: DWORD;
Begin
Result := Windows.WindowFromPoint(Windows.POINT(Point));
// check if window created by this process
Windows.GetWindowThreadProcessId(Result, @ProcessID);
if ProcessID <> Windows.GetCurrentProcessID then
Result := 0;
End;
{We interprete CritSection as a pointer to a LPCRITICAL_SECTION structure}
Procedure TWin32WidgetSet.InitializeCriticalSection(var CritSection: TCriticalSection);
var
Crit : LPCRITICAL_SECTION;
begin
{ An OS Compatible TCriticalSection needs to be defined}
If CritSection <> 0 then
DeleteCriticalSection(CritSection);
New(Crit);
Windows.InitializeCriticalSection(Crit);
CritSection := TCriticalSection(Crit);
end;
Procedure TWin32WidgetSet.EnterCriticalSection(var CritSection: TCriticalSection);
begin
{ An OS Compatible TCriticalSection needs to be defined}
Windows.EnterCriticalSection(LPCRITICAL_SECTION(CritSection));
end;
Procedure TWin32WidgetSet.LeaveCriticalSection(var CritSection: TCriticalSection);
begin
{ An OS Compatible TCriticalSection needs to be defined}
Windows.LeaveCriticalSection(LPCRITICAL_SECTION(CritSection));
end;
Procedure TWin32WidgetSet.DeleteCriticalSection(var CritSection: TCriticalSection);
begin
{ An OS Compatible TCriticalSection needs to be defined}
if CritSection<>0 then
begin
Windows.DeleteCriticalSection(LPCRITICAL_SECTION(CritSection));
Try
Dispose(LPCRITICAL_SECTION(CritSection));
finally
CritSection := 0;
end;
end;
end;
//##apiwiz##eps## // Do not remove
{$IFDEF ASSERT_IS_ON}
{$UNDEF ASSERT_IS_ON}
{$C-}
{$ENDIF}
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