mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
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711 lines
23 KiB
PHP
711 lines
23 KiB
PHP
{%MainUnit win32int.pp}
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{
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*****************************************************************************
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* *
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* This file is part of the Lazarus Component Library (LCL) *
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* *
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* See the file COPYING.modifiedLGPL, included in this distribution, *
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* for details about the copyright. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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*****************************************************************************
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}
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{$IFOPT C-}
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// Uncomment for local trace
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// {$C+}
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// {$DEFINE ASSERT_IS_ON}
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{$ENDIF}
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.Create
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Params: None
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Returns: Nothing
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Constructor for the class.
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------------------------------------------------------------------------------}
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Constructor TWin32WidgetSet.Create;
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Begin
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Inherited Create;
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FTimerData := TList.Create;
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FMetrics.cbSize := SizeOf(FMetrics);
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FMetricsFailed := not Windows.SystemParametersInfo(SPI_GETNONCLIENTMETRICS,
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SizeOf(FMetrics), @FMetrics, 0);
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if FMetricsFailed then
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begin
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FMetrics.iMenuHeight := GetSystemMetrics(SM_CYMENU);
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end;
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OnClipBoardRequest := nil;
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Pointer(InitCommonControlsEx) := GetProcAddress(GetModuleHandle('comctl32.dll'), 'InitCommonControlsEx');
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End;
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.Destroy
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Params: None
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Returns: Nothing
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Destructor for the class.
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------------------------------------------------------------------------------}
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Destructor TWin32WidgetSet.Destroy;
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var
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n: integer;
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TimerInfo : PWin32TimerInfo;
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Begin
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Assert(False, 'Trace:TWin32WidgetSet is being destroyed');
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n := FTimerData.Count;
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if (n > 0) then
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begin
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DebugLn(Format('[TWin32WidgetSet.Destroy] WARNING: There are %d TimerInfo structures left, I''ll free them' ,[n]));
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while (n > 0) do
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begin
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dec(n);
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TimerInfo := PWin32Timerinfo(FTimerData[n]);
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Dispose(TimerInfo);
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FTimerData.Delete(n);
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end;
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end;
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if FStockNullBrush <> 0 then
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begin
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DeleteObject(FStockNullBrush);
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DeleteObject(FStockBlackBrush);
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DeleteObject(FStockLtGrayBrush);
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DeleteObject(FStockGrayBrush);
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DeleteObject(FStockDkGrayBrush);
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DeleteObject(FStockWhiteBrush);
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end;
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if FStatusFont <> 0 then
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begin
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Windows.DeleteObject(FStatusFont);
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Windows.DeleteObject(FMessageFont);
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end;
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FTimerData.Free;
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if FAppHandle <> 0 then
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DestroyWindow(FAppHandle);
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Windows.UnregisterClass(@ClsName, System.HInstance);
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inherited Destroy;
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End;
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.AppInit
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Params: None
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Returns: Nothing
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Initialize Windows
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------------------------------------------------------------------------------}
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procedure TWin32WidgetSet.AppInit(var ScreenInfo: TScreenInfo);
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var
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ICC: TINITCOMMONCONTROLSEX;
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LogBrush: TLOGBRUSH;
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SysMenu: HMENU;
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Handle: HWND;
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DC: HDC;
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begin
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Assert(False, 'Trace:Win32Object.Init - Start');
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if not WinRegister then
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begin
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Assert(False, 'Trace:Win32Object.Init - Register Failed');
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DebugLn('Trace:Win32Object.Init - Register Failed');
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Exit;
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end;
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//Init stock objects;
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LogBrush.lbStyle := BS_NULL;
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FStockNullBrush := CreateBrushIndirect(LogBrush);
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LogBrush.lbStyle := BS_SOLID;
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LogBrush.lbColor := $000000;
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FStockBlackBrush := CreateBrushIndirect(LogBrush);
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LogBrush.lbColor := $C0C0C0;
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FStockLtGrayBrush := CreateBrushIndirect(LogBrush);
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LogBrush.lbColor := $808080;
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FStockGrayBrush := CreateBrushIndirect(LogBrush);
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LogBrush.lbColor := $404040;
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FStockDkGrayBrush := CreateBrushIndirect(LogBrush);
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LogBrush.lbColor := $FFFFFF;
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FStockWhiteBrush := CreateBrushIndirect(LogBrush);
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if FMetricsFailed then
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begin
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FStatusFont := Windows.GetStockObject(DEFAULT_GUI_FONT);
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FMessageFont := Windows.GetStockObject(DEFAULT_GUI_FONT);
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end else begin
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FStatusFont := Windows.CreateFontIndirect(@FMetrics.lfStatusFont);
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FMessageFont := Windows.CreateFontIndirect(@FMetrics.lfMessageFont);
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end;
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//TODO: Remove when the WS interface is implemented
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// Common controls only need to be initialized when used
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// So they are initialized in the CreateHandle for common controls
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InitCommonControls;
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ICC.dwSize := SizeOf(TINITCOMMONCONTROLSEX);
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ICC.dwICC := ICC_DATE_CLASSES;
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if InitCommonControlsEx <> nil then
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InitCommonControlsEx(@ICC);
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// Create parent of all windows, `button on taskbar'
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FAppHandle := CreateWindow(@ClsName, PChar(Application.Title), WS_POPUP or
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WS_CLIPSIBLINGS or WS_SYSMENU or WS_MINIMIZEBOX,
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0, {Windows.GetSystemMetrics(SM_CXSCREEN) div 2,}
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0, {Windows.GetSystemMetrics(SM_CYSCREEN) div 2,}
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0, 0, HWND(nil), HMENU(nil), HInstance, nil);
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AllocWindowInfo(FAppHandle);
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// set nice main icon
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Windows.SendMessage(FAppHandle, WM_SETICON, ICON_BIG,
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LParam(Windows.LoadIcon(MainInstance, 'MAINICON')));
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// remove useless menuitems from sysmenu
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SysMenu := Windows.GetSystemMenu(FAppHandle, False);
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Windows.DeleteMenu(SysMenu, SC_MAXIMIZE, MF_BYCOMMAND);
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Windows.DeleteMenu(SysMenu, SC_SIZE, MF_BYCOMMAND);
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Windows.DeleteMenu(SysMenu, SC_MOVE, MF_BYCOMMAND);
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// initialize ScreenInfo
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Handle := GetDesktopWindow;
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DC := Windows.GetDC(Handle);
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ScreenInfo.PixelsPerInchX := GetDeviceCaps(DC, LOGPIXELSX);
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ScreenInfo.PixelsPerInchY := GetDeviceCaps(DC, LOGPIXELSY);
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ScreenInfo.ColorDepth := GetDeviceCaps(DC, BITSPIXEL);
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ReleaseDC(Handle, DC);
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// Thread.Synchronize support
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WakeMainThread := @HandleWakeMainThread;
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Assert(False, 'Trace:Win32Object.Init - Exit');
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end;
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.AppMinimize
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Params: None
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Returns: Nothing
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Minimizes the whole application to the taskbar
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------------------------------------------------------------------------------}
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procedure TWin32WidgetSet.AppMinimize;
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begin
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Windows.SendMessage(FAppHandle, WM_SYSCOMMAND, SC_MINIMIZE, 0);
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end;
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.AppRestore
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Params: None
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Returns: Nothing
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Restore minimized whole application from taskbar
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------------------------------------------------------------------------------}
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procedure TWin32WidgetSet.AppRestore;
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begin
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Windows.SendMessage(FAppHandle, WM_SYSCOMMAND, SC_RESTORE, 0);
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end;
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.AppBringToFront
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Params: None
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Returns: Nothing
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Brings the entire application on top of all other non-topmost programs
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------------------------------------------------------------------------------}
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procedure TWin32WidgetSet.AppBringToFront;
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begin
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Windows.SetForegroundWindow(FAppHandle);
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end;
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procedure TWin32WidgetSet.SetDesigning(AComponent: TComponent);
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begin
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//if Data<>nil then EnableWindow((AComponent As TWinControl).Handle, boolean(Data^));
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end;
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.SetCallback
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Params: Msg - message for which to set a callback
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Sender - object to which callback will be sent
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Returns: nothing
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Applies a Message to the sender
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------------------------------------------------------------------------------}
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Procedure TWin32WidgetSet.SetCallback(Msg: LongInt; Sender: TObject);
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Var
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Window: HWnd;
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Begin
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Assert(False, 'Trace:TWin32WidgetSet.SetCallback - Start');
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Assert(False, Format('Trace:TWin32WidgetSet.SetCallback - Class Name --> %S', [Sender.ClassName]));
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Assert(False, Format('Trace:TWin32WidgetSet.SetCallback - Message Name --> %S', [GetMessageName(Msg)]));
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If Sender Is TControlCanvas Then
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Window := TControlCanvas(Sender).Handle
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Else If Sender Is TCustomForm Then
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Window := TCustomForm(Sender).Handle
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Else
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Window := TWinControl(Sender).Handle;
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if Window=0 then exit;
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Assert(False, 'Trace:TWin32WidgetSet.SetCallback - Exit');
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End;
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.RemoveCallbacks
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Params: Sender - object from which to remove callbacks
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Returns: nothing
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Removes Call Back Signals from the sender
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------------------------------------------------------------------------------}
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Procedure TWin32WidgetSet.RemoveCallbacks(Sender: TObject);
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Var
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Window: HWnd;
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Begin
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If Sender Is TControlCanvas Then
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Window := TControlCanvas(Sender).Handle
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Else If Sender Is TCustomForm Then
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Window := TCustomForm(Sender).Handle
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Else
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Window := (Sender as TWinControl).Handle;
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if Window=0 then exit;
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End;
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function TWin32WidgetSet.InitHintFont(HintFont: TObject): Boolean;
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begin
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TFont(HintFont).Name := FMetrics.lfStatusFont.lfFaceName;
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TFont(HintFont).Style := [];
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TFont(HintFont).Height := FMetrics.lfStatusFont.lfHeight;
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TFont(HintFont).Color := clInfoText;
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TFont(HintFont).Pitch := fpDefault;
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Result := true;
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end;
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.AppProcessMessages
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Params: None
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Returns: Nothing
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Handle all pending messages
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------------------------------------------------------------------------------}
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procedure TWin32WidgetSet.AppProcessMessages;
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var
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AMessage: TMsg;
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AccelTable: HACCEL;
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retVal, index: dword;
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pHandles: Windows.LPHANDLE;
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begin
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repeat
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{$ifdef DEBUG_ASYNCEVENTS}
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if Length(FWaitHandles) > 0 then
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DebugLn('[ProcessMessages] WaitHandleCount=', IntToStr(FWaitHandleCount),
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', WaitHandle[0]=', IntToHex(FWaitHandles[0], 8));
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{$endif}
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pHandles := nil;
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if FWaitHandleCount > 0 then
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pHandles := @FWaitHandles[0];
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retVal := Windows.MsgWaitForMultipleObjects(FWaitHandleCount,
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pHandles, false, 0, QS_ALLINPUT);
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if (WAIT_OBJECT_0 <= retVal) and (retVal < WAIT_OBJECT_0 + FWaitHandleCount) then
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begin
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index := retVal-WAIT_OBJECT_0;
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FWaitHandlers[index].OnEvent(FWaitHandlers[index].UserData, 0);
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end else
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if retVal = WAIT_OBJECT_0 + FWaitHandleCount then
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begin
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while PeekMessage(AMessage, HWnd(Nil), 0, 0,PM_REMOVE) do
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begin
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AccelTable := GetWindowInfo(AMessage.HWnd)^.Accel;
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if (AccelTable = HACCEL(nil))
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or (TranslateAccelerator(AMessage.HWnd, AccelTable, @AMessage) = 0) then
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begin
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TranslateMessage(@AMessage);
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DispatchMessage(@AMessage);
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end;
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end;
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end else
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if retVal = WAIT_TIMEOUT then
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begin
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// check for pending to-be synchronized methods
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CheckSynchronize;
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CheckPipeEvents;
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break;
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end else
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if retVal = $FFFFFFFF then
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begin
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DebugLn('[TWin32WidgetSet.AppProcessMessages] MsgWaitForMultipleObjects returned: ', IntToStr(GetLastError));
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break;
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end;
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until false;
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End;
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procedure TWin32WidgetSet.CheckPipeEvents;
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var
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lHandler: PPipeEventInfo;
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lBytesAvail: dword;
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SomethingChanged: Boolean;
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ChangedCount:integer;
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begin
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lHandler := FWaitPipeHandlers;
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ChangedCount:=0;
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while (lHandler <> nil) and (ChangedCount<10) do
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begin
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SomethingChanged:=true;
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if Windows.PeekNamedPipe(lHandler^.Handle, nil, 0, nil, @lBytesAvail, nil) then
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begin
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if lBytesAvail <> 0 then
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lHandler^.OnEvent(lHandler^.UserData, [prDataAvailable])
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else
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SomethingChanged := false;
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end else
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lHandler^.OnEvent(lHandler^.UserData, [prBroken]);
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if SomethingChanged then
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lHandler := FWaitPipeHandlers
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else begin
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lHandler := lHandler^.Next;
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ChangedCount := 0;
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end;
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inc(ChangedCount);
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end;
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end;
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.AppWaitMessage
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Params: None
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Returns: Nothing
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Passes execution control to Windows
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------------------------------------------------------------------------------}
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procedure TWin32WidgetSet.AppWaitMessage;
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var
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timeout: dword;
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pHandles: Windows.LPHANDLE;
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begin
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RedrawMenus;
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Assert(False, 'Trace:TWin32WidgetSet.WaitMessage - Start');
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if FWaitPipeHandlers <> nil then
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timeout := 100
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else
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timeout := INFINITE;
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pHandles := nil;
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if FWaitHandleCount > 0 then
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pHandles := @FWaitHandles[0];
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Windows.MsgWaitForMultipleObjects(FWaitHandleCount, pHandles,
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false, timeout, QS_ALLINPUT);
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Assert(False,'Trace:Leave wait message');
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End;
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.AppTerminate
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Params: None
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Returns: Nothing
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Tells Windows to halt and destroy
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------------------------------------------------------------------------------}
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Procedure TWin32WidgetSet.AppTerminate;
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Begin
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Assert(False, 'Trace:TWin32WidgetSet.AppTerminate - Start');
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End;
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procedure TWin32WidgetSet.AppSetTitle(const ATitle: string);
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begin
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{$ifdef WindowsUnicodeSupport}
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if UnicodeEnabledOS
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then Windows.SetWindowTextW(FAppHandle, PWideChar(Utf8Decode(ATitle)))
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else Windows.SetWindowText(FAppHandle, PChar(Utf8ToAnsi(ATitle)));
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{$else}
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Windows.SetWindowText(FAppHandle, PChar(ATitle));
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{$endif}
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end;
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function TWin32WidgetSet.LCLPlatform: TLCLPlatform;
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begin
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Result:= lpWin32;
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end;
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{------------------------------------------------------------------------------
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Function: CreateTimer
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Params: Interval:
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TimerFunc: Callback
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Returns: a Timer id (use this ID to destroy timer)
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Design: A timer which calls TimerCallBackProc, is created.
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The TimerCallBackProc calls the TimerFunc.
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------------------------------------------------------------------------------}
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function TWin32WidgetSet.CreateTimer(Interval: integer; TimerFunc: TFNTimerProc) : THandle;
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var
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TimerInfo: PWin32TimerInfo;
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begin
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Assert(False,'Trace:Create Timer: ' + IntToStr(Interval));
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Result := 0;
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if (Interval > 0) and (TimerFunc <> nil) then begin
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New(TimerInfo);
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TimerInfo^.TimerFunc := TimerFunc;
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TimerInfo^.TimerID := Windows.SetTimer(0, 0, Interval, @TimerCallBackProc);
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if TimerInfo^.TimerID=0 then
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dispose(TimerInfo)
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else begin
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FTimerData.Add(TimerInfo);
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Result := TimerInfo^.TimerID;
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end;
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end;
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Assert(False,'Trace:Result: ' + IntToStr(result));
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end;
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{------------------------------------------------------------------------------
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Function: DestroyTimer
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Params: TimerHandle
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Returns:
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------------------------------------------------------------------------------}
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function TWin32WidgetSet.DestroyTimer(TimerHandle: THandle) : boolean;
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var
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n : integer;
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TimerInfo : PWin32Timerinfo;
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begin
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Result:= false;
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Assert(False,'Trace:removing timer: '+ IntToStr(TimerHandle));
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n := FTimerData.Count;
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while (n>0) do begin
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dec(n);
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TimerInfo := FTimerData[n];
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if (TimerInfo^.TimerID=UINT(TimerHandle)) then
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begin
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Result := Boolean(Windows.KillTimer(0, UINT(TimerHandle)));
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FTimerData.Delete(n);
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Dispose(TimerInfo);
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end;
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end;
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Assert(False,'Trace:Destroy timer Result: '+ BOOL_RESULT[result]);
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end;
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procedure TWin32WidgetSet.HandleWakeMainThread(Sender: TObject);
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begin
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// wake up GUI thread by sending a message to it
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Windows.PostMessage(AppHandle, WM_NULL, 0, 0);
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end;
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procedure TWin32WidgetSet.AttachMenuToWindow(AMenuObject: TComponent);
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var
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AMenu: TMenu;
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AWinControl: TWinControl;
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begin
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AMenu := AMenuObject as TMenu;
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if AMenu is TMainMenu then
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begin
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AWinControl := TWinControl(AMenu.Owner);
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Windows.SetMenu(AWinControl.Handle, AMenu.Handle);
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//Set the right order menu after attach the menu
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SetMenuFlag(AMenu.Handle, MFT_RIGHTORDER or MFT_RIGHTJUSTIFY, AMenu.IsRightToLeft);
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AddToChangedMenus(AWinControl.Handle);
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end;
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end;
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{ Private methods (in no significant order) }
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{------------------------------------------------------------------------------
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Method: TWin32WidgetSet.WinRegister
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Params: None
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Returns: If the window was successfully regitered
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Registers the main window class
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------------------------------------------------------------------------------}
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Function TWin32WidgetSet.WinRegister: Boolean;
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Var
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WindowClass: WndClass;
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WindowClassW: WndClassW;
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Begin
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Assert(False, 'Trace:WinRegister - Start');
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if UnicodeEnabledOS
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then begin
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with WindowClassW do
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begin
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Style := CS_DBLCLKS{CS_HRedraw or CS_VRedraw};
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LPFnWndProc := @WindowProc;
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CbClsExtra := 0;
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CbWndExtra := 0;
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hInstance := System.HInstance;
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hIcon := Windows.LoadIcon(MainInstance, 'MAINICON');
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if hIcon = 0 then
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hIcon := Windows.LoadIcon(0, IDI_APPLICATION);
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hCursor := Windows.LoadCursor(0, IDC_ARROW);
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hbrBackground := 0; {GetSysColorBrush(Color_BtnFace);}
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LPSzMenuName := Nil;
|
|
LPSzClassName := PWideChar(WideString(ClsName));
|
|
end;
|
|
Result := Windows.RegisterClassW(@WindowClassW) <> 0;
|
|
end
|
|
else begin
|
|
with WindowClass do
|
|
begin
|
|
Style := CS_DBLCLKS{CS_HRedraw or CS_VRedraw};
|
|
LPFnWndProc := @WindowProc;
|
|
CbClsExtra := 0;
|
|
CbWndExtra := 0;
|
|
hInstance := System.HInstance;
|
|
hIcon := Windows.LoadIcon(MainInstance, 'MAINICON');
|
|
if hIcon = 0 then
|
|
hIcon := Windows.LoadIcon(0, IDI_APPLICATION);
|
|
hCursor := Windows.LoadCursor(0, IDC_ARROW);
|
|
hbrBackground := 0; {GetSysColorBrush(Color_BtnFace);}
|
|
LPSzMenuName := Nil;
|
|
LPSzClassName := @ClsName;
|
|
end;
|
|
Result := Windows.RegisterClass(@WindowClass) <> 0;
|
|
end;
|
|
Assert(False, 'Trace:WinRegister - Exit');
|
|
End;
|
|
|
|
{------------------------------------------------------------------------------
|
|
Method: TWin32WidgetSet.NormalizeIconName
|
|
Params: IconName - The name of the icon to normalize
|
|
Returns: Nothing
|
|
|
|
Adjusts an icon name to the proper format
|
|
------------------------------------------------------------------------------}
|
|
Procedure TWin32WidgetSet.NormalizeIconName(Var IconName: String);
|
|
Var
|
|
IcoLen: Integer;
|
|
Begin
|
|
DoDirSeparators(IconName);
|
|
IcoLen := Pos('.xmp', LowerCase(IconName));
|
|
If IcoLen <> 0 Then
|
|
Begin
|
|
Delete(IconName, IcoLen, Length('.xpm'));
|
|
Insert('.ico', IconName, Length(IconName));
|
|
End
|
|
End;
|
|
|
|
Procedure TWin32WidgetSet.NormalizeIconName(Var IconName: PChar);
|
|
Var
|
|
Str: String;
|
|
Begin
|
|
Str := String(IconName);
|
|
NormalizeIconName(Str);
|
|
IconName := StrToPChar(Str);
|
|
End;
|
|
|
|
function TWin32WidgetSet.CreateThemeServices: TThemeServices;
|
|
begin
|
|
Result := TWin32ThemeServices.Create;
|
|
end;
|
|
|
|
{------------------------------------------------------------------------------
|
|
Function: TWin32WidgetSet.CreateComponent
|
|
Params: Sender - object for which to create visual representation
|
|
Returns: nothing
|
|
|
|
Tells Windows to create a control
|
|
------------------------------------------------------------------------------}
|
|
function TWin32WidgetSet.CreateComponent(Sender: TObject): THandle;
|
|
begin
|
|
DebugLn('WARNING: TWin32WidgetSet.CreateComponent is deprecated, should not be reachable!!');
|
|
Result := 0;
|
|
end;
|
|
|
|
{------------------------------------------------------------------------------
|
|
Method: TWin32WidgetSet.AssignSelf
|
|
Params: Window - The window to assign
|
|
Data - The data to assign to the window
|
|
Returns: Nothing
|
|
|
|
Assigns data to a window
|
|
------------------------------------------------------------------------------}
|
|
procedure TWin32WidgetSet.AssignSelf(Window: HWnd; Data: Pointer);
|
|
begin
|
|
Assert(False, 'Trace:[TWin32WidgetSet.AssignSelf] Trying to code it. It''s probably wrong.');
|
|
end;
|
|
|
|
{------------------------------------------------------------------------------
|
|
Method: TWin32WidgetSet.ShowHide
|
|
Params: Sender - The sending object
|
|
Returns: Nothing
|
|
|
|
Shows or hides a control
|
|
------------------------------------------------------------------------------}
|
|
Procedure TWin32WidgetSet.ShowHide(Sender: TObject);
|
|
Var
|
|
Handle: HWND;
|
|
ParentPanel: HWND;
|
|
Flags: dword;
|
|
Begin
|
|
If (TControl(Sender).FCompStyle = csPage) or (TControl(Sender).FCompStyle = csToolButton) then exit;
|
|
Handle := ObjectToHWND(Sender);
|
|
ParentPanel := GetWindowInfo(Handle)^.ParentPanel;
|
|
if ParentPanel <> 0 then
|
|
Handle := ParentPanel;
|
|
If TControl(Sender).HandleObjectShouldBeVisible Then
|
|
Begin
|
|
Assert(False, 'Trace: [TWin32WidgetSet.ShowHide] Showing the window');
|
|
if TControl(Sender).FCompStyle = csHintWindow then
|
|
begin
|
|
Windows.SetWindowPos(Handle, HWND_TOPMOST, 0, 0, 0, 0, SWP_SHOWWINDOW or SWP_NOMOVE or SWP_NOSIZE or SWP_NOACTIVATE or SWP_NOOWNERZORDER);
|
|
end else begin
|
|
Flags := SW_SHOW;
|
|
if TControl(Sender) is TCustomForm then
|
|
case TCustomForm(Sender).WindowState of
|
|
wsMaximized: Flags := SW_SHOWMAXIMIZED;
|
|
wsMinimized: Flags := SW_SHOWMINIMIZED;
|
|
end;
|
|
Windows.ShowWindow(Handle, Flags);
|
|
{ ShowWindow does not send WM_SHOWWINDOW when creating overlapped maximized window }
|
|
{ TODO: multiple WM_SHOWWINDOW when maximizing after initial show? }
|
|
if Flags = SW_SHOWMAXIMIZED then
|
|
Windows.SendMessage(Handle, WM_SHOWWINDOW, 1, 0);
|
|
end;
|
|
If (Sender Is TCustomForm) Then
|
|
SetClassLong(Handle, GCL_HICON, LONG(TCustomForm(Sender).GetIconHandle));
|
|
End
|
|
Else
|
|
Begin
|
|
Assert(False, 'TRACE: [TWin32WidgetSet.ShowHide] Hiding the window');
|
|
ShowWindow(Handle, SW_HIDE);
|
|
End;
|
|
End;
|
|
|
|
{------------------------------------------------------------------------------
|
|
Method: TWin32WidgetSet.DCReDraw
|
|
Params: CanvasHandle - HDC to redraw
|
|
Returns: Nothing
|
|
|
|
Redraws (the window of) a canvas
|
|
------------------------------------------------------------------------------}
|
|
procedure TWin32WidgetSet.DCRedraw(CanvasHandle: HDC);
|
|
begin
|
|
// TODO: implement me!
|
|
Assert(False, 'TRACE:[TWin32WidgetSet.ReDraw] Redrawing...');
|
|
Assert(False, 'TRACE:Invalidating the window');
|
|
Assert(False, 'TRACE:Updating the window');
|
|
Assert(False, 'TRACE:[TWin32WidgetSet.ReDraw] Finished redrawing');
|
|
end;
|
|
|
|
{------------------------------------------------------------------------------
|
|
Method: TWin32WidgetSet.SetPixel
|
|
Params: Canvas - canvas to set color on
|
|
X, Y - position
|
|
AColor - new color for specified position
|
|
Returns: nothing
|
|
|
|
Set the color of the specified pixel on the canvas
|
|
------------------------------------------------------------------------------}
|
|
procedure TWin32WidgetSet.DCSetPixel(CanvasHandle: HDC; X, Y: integer; AColor: TGraphicsColor);
|
|
begin
|
|
Windows.SetPixel(CanvasHandle, X, Y, AColor);
|
|
end;
|
|
|
|
{------------------------------------------------------------------------------
|
|
Method: TWin32WidgetSet.GetPixel
|
|
Params: Canvas - canvas to get color from
|
|
X, Y - position
|
|
Returns: Color at specified point
|
|
|
|
Get the color of the specified pixel on the canvas
|
|
-----------------------------------------------------------------------------}
|
|
function TWin32WidgetSet.DCGetPixel(CanvasHandle: HDC; X, Y: integer): TGraphicsColor;
|
|
begin
|
|
Result := Windows.GetPixel(CanvasHandle, X, Y);
|
|
end;
|
|
|
|
{$IFDEF ASSERT_IS_ON}
|
|
{$UNDEF ASSERT_IS_ON}
|
|
{$C-}
|
|
{$ENDIF}
|