lazarus-ccr/components/mbColorLib/mbColorTree.pas
2016-12-08 23:14:26 +00:00

687 lines
17 KiB
ObjectPascal

unit mbColorTree;
{$IFDEF FPC}
{$MODE DELPHI}
{$ENDIF}
interface
{$I mxs.inc}
uses
{$IFDEF FPC}
LCLIntf, LCLType, LMessages,
{$ELSE}
Windows, Messages,
{$ENDIF}
SysUtils, Classes, Controls, ComCtrls, Graphics,
{$IFDEF DELPHI_7_UP} Themes, {$ENDIF} {$IFDEF DELPHI_6_UP}GraphUtil,{$ENDIF}
ImgList, HTMLColors, RGBHSLUtils, RGBHSVUtils, RGBCMYKUtils, RGBCIEUtils,
Forms;
type
{$IFNDEF DELPHI_6_UP}
TScrollDirection = (sdLeft, sdRight, sdUp, sdDown);
{$ENDIF}
TmbColor = record
name: string;
value: TColor;
end;
TDrawCaptionEvent = procedure (Sender: TObject; AIndex: integer; AFont: TFont; var AText: string; Selected: boolean) of object;
TDrawLabelEvent = procedure (Sender: TObject; AIndex: integer; AFont: TFont; var AText: string) of object;
TGetHintEvent = procedure (AIndex: integer; var AHint: string; var Handled: boolean) of object;
TmbColorTree = class(TCustomTreeView)
private
dummy: TCustomImageList;
FInfo1, FInfo2: string;
FInfoLabel: string;
FDraw: TDrawCaptionEvent;
FDraw1, FDraw2, FDraw3: TDrawLabelEvent;
mx, my: integer;
FGetHint: TGetHintEvent;
FOnStartDrag: TStartDragEvent;
FOnEndDrag: TEndDragEvent;
procedure SetInfo1(Value: string);
procedure SetInfo2(Value: string);
procedure SetInfoLabel(Value: string);
protected
function CanChange(Node: TTreeNode): Boolean; override;
procedure CMHintShow(var Message: TCMHintShow); message CM_HINTSHOW;
procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override;
function CustomDrawItem(Node: TTreeNode; State: TCustomDrawState;
Stage: TCustomDrawStage; var PaintImages: Boolean): Boolean; override;
function IsCustomDrawn(Target: TCustomDrawTarget; Stage: TCustomDrawStage): Boolean; {$IFDEF DELPHI_7_UP}override;{$ENDIF}
procedure DrawColorItem(R: TRect; Selected: boolean; Index: integer; itemText: string; Expanded: boolean); dynamic;
procedure DrawInfoItem(R: TRect; Index: integer); dynamic;
procedure DoArrow(c: TCanvas; dir: TScrollDirection; p: TPoint; sel: boolean);
public
Colors: array of TmbColor;
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure UpdateColors;
procedure AddColor(Name: string; Value: TColor; refresh: boolean = true);
procedure ClearColors;
procedure DeleteColor(Index: integer; refresh: boolean = true);
procedure DeleteColorByName(Name: string; All: boolean);
procedure DeleteColorByValue(Value: TColor; All: boolean);
procedure InsertColor(Index: integer; Name: string; Value: TColor);
function ColorCount: integer;
published
property InfoLabelText: string read FInfoLabel write SetInfoLabel;
property InfoDisplay1: string read FInfo1 write SetInfo1;
property InfoDisplay2: string read FInfo2 write SetInfo2;
property Align;
property Anchors;
property AutoExpand;
{$IFDEF DELPHI}
property BevelEdges;
property BevelInner;
property BevelOuter;
property BevelKind default bkNone;
property BevelWidth;
{$ENDIF}
property BorderStyle;
property BorderWidth;
{$IFDEF DELPHI}
property ChangeDelay;
property Ctl3D;
property ParentCtl3D;
{$ENDIF}
property Constraints;
property Color;
property DragKind;
property DragCursor;
property DragMode;
property Enabled;
property Font;
property Indent;
{$IFDEF DELPHI_7_UP}
property MultiSelect;
property MultiSelectStyle;
{$ENDIF}
property ParentColor default False;
property ParentFont;
property ParentShowHint;
property PopupMenu;
property RightClickSelect;
property ShowHint;
property SortType;
property TabOrder;
property TabStop default True;
property ToolTips;
property Visible;
property OnGetHint: TGetHintEvent read FGetHint write FGetHint;
property OnDrawCaption: TDrawCaptionEvent read FDraw write FDraw;
property OnDrawInfoLabel: TDrawLabelEvent read FDraw1 write FDraw1;
property OnDrawInfoDisplay1: TDrawLabelEvent read FDraw2 write FDraw2;
property OnDrawInfoDisplay2: TDrawLabelEvent read FDraw3 write FDraw3;
{$IFDEF DELPHI_7_UP}
property OnAddition;
property OnCreateNodeClass;
{$ENDIF}
property OnAdvancedCustomDraw;
property OnAdvancedCustomDrawItem;
property OnChange;
property OnChanging;
property OnClick;
property OnCollapsed;
property OnCollapsing;
property OnCompare;
property OnContextPopup;
property OnCustomDraw;
property OnCustomDrawItem;
property OnDblClick;
property OnDeletion;
property OnDragDrop;
property OnDragOver;
property OnEndDock;
property OnEndDrag: TEndDragEvent read FOnEndDrag write FOnEndDrag;
property OnEnter;
property OnExit;
property OnExpanding;
property OnExpanded;
property OnKeyDown;
property OnKeyPress;
property OnKeyUp;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
property OnStartDock;
property OnStartDrag: TStartDragEvent read FOnStartDrag write FOnStartDrag;
property Items;
end;
procedure Register;
implementation
{$IFDEF FPC}
{$R mbColorTree.dcr}
{$ENDIF}
uses
PalUtils;
procedure Register;
begin
RegisterComponents('mbColor Lib', [TmbColorTree]);
end;
//taken from GraphUtil, only for Delphi 5
{$IFNDEF DELPHI_6_UP}
procedure DrawArrow(ACanvas: TCanvas; Direction: TScrollDirection;
Location: TPoint; Size: Integer);
const
ArrowPts: array[TScrollDirection, 0..2] of TPoint =
(((X:1; Y:0), (X:0; Y:1), (X:1; Y:2)),
((X:0; Y:0), (X:1; Y:1), (X:0; Y:2)),
((X:0; Y:1), (X:1; Y:0), (X:2; Y:1)),
((X:0; Y:0), (X:1; Y:1), (X:2; Y:0)));
var
I: Integer;
Pts: array[0..2] of TPoint;
OldWidth: Integer;
OldColor: TColor;
begin
if ACanvas = nil then exit;
OldColor := ACanvas.Brush.Color;
ACanvas.Brush.Color := ACanvas.Pen.Color;
Move(ArrowPts[Direction], Pts, SizeOf(Pts));
for I := 0 to 2 do
Pts[I] := Point(Pts[I].x * Size + Location.X, Pts[I].y * Size + Location.Y);
with ACanvas do
begin
OldWidth := Pen.Width;
Pen.Width := 1;
Polygon(Pts);
Pen.Width := OldWidth;
Brush.Color := OldColor;
end;
end;
{$ENDIF}
{ TmbColorTree }
constructor TmbColorTree.Create(AOwner: TComponent);
begin
inherited;
ControlStyle := ControlStyle + [csDisplayDragImage];
MaxHue := 360;
MaxSat := 255;
MaxLum := 255;
ReadOnly := true;
ShowButtons := false;
ShowLines := false;
ShowRoot := true;
RowSelect := true;
HotTrack := false;
SetLength(Colors, 0);
dummy := TCustomImageList.Create(Self);
dummy.Width := 48;
dummy.Height := 48;
Images := dummy;
FInfoLabel := 'Color Values:';
FInfo1 := 'RGB: %r.%g.%b';
FInfo2 := 'HEX: #%hex';
end;
destructor TmbColorTree.Destroy;
begin
dummy.Free;
inherited;
end;
procedure TmbColorTree.UpdateColors;
var
i: integer;
n: TTreeNode;
begin
Items.Clear;
for i := 0 to Length(Colors) - 1 do
begin
n := Items.Add(TopItem, Colors[i].name);
Items.AddChild(n, '');
end;
end;
function TmbColorTree.CanChange(Node: TTreeNode): Boolean;
begin
Result := Node.HasChildren;
end;
procedure TmbColorTree.MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
r: TRect;
begin
inherited;
if (ssShift in Shift) or (ssCtrl in Shift) then Exit;
if Selected <> nil then
r := Selected.DisplayRect(false)
else
Exit;
if (x > r.Right - 15) and (x < r.Right - 3) and (y > r.Top + 13) and (y < r.Top + 30) then
if (Selected.HasChildren) and PtInRect(r, Point(x, y)) then
begin
if selected.Expanded then
Selected.Collapse(false)
else
Selected.Expand(false);
Invalidate;
end;
end;
procedure TmbColorTree.MouseMove(Shift: TShiftState; X, Y: Integer);
var
r: TRect;
begin
inherited;
mx := x;
my := y;
if GetNodeAt(x, y) <> nil then
r := GetNodeAt(x, y).DisplayRect(false)
else
begin
Cursor := crDefault;
Exit;
end;
if (x > r.Right - 15) and (x < r.Right - 3) and (y > r.Top + 13) and (y < r.Top + 30) then
begin
if (GetNodeAt(x, y).HasChildren) and PtInRect(r, Point(x, y)) then
Cursor := crHandPoint
else
Cursor := crDefault;
end
else
Cursor := crDefault;
end;
function TmbColorTree.CustomDrawItem(Node: TTreeNode; State: TCustomDrawState;
Stage: TCustomDrawStage; var PaintImages: Boolean): Boolean;
begin
Result := true;
if Length(Colors) = 0 then Exit;
if Node.HasChildren then
DrawColorItem(Node.DisplayRect(false), cdsSelected in State, node.Index, node.Text, node.Expanded)
else
DrawInfoItem(Node.DisplayRect(false), node.Parent.Index);
end;
procedure TmbColorTree.DoArrow(c: TCanvas; dir: TScrollDirection; p: TPoint; sel: boolean);
var
b: TBitmap;
begin
b := TBitmap.Create;
try
b.Height := 12;
b.Width := 12;
if Sel then
begin
b.Canvas.Brush.Color := clHighlight;
b.Canvas.Pen.Color := clHighlightText;
end
else
begin
b.Canvas.Brush.Color := clBtnFace;
b.Canvas.Pen.Color := clWindowText;
end;
b.Canvas.FillRect(B.Canvas.ClipRect);
case dir of
sdDown: DrawArrow(b.Canvas, dir, Point(2, 3), 3);
sdRight: DrawArrow(b.Canvas, dir, Point(1, 2), 3);
end;
c.Draw(p.x, p.y, b);
finally
b.Free;
end;
end;
procedure TmbColorTree.DrawColorItem(R: TRect; Selected: boolean; Index: integer; itemText: string; Expanded: boolean);
var
SR, TR: TRect;
begin
with Canvas do
begin
//background
Pen.Color := clWindow;
if Selected then
Brush.Color := clHighlight
else
Brush.Color := clBtnFace;
FillRect(R);
MoveTo(R.Left, R.Bottom - 1);
LineTo(R.Right, R.Bottom - 1);
//swatches
SR := Rect(R.Left + 6, R.Top + 6, R.Left + 42, R.Top + 42);
Brush.Color := Self.Colors[Index].value;
if Selected then
begin
{$IFDEF DELPHI_7_UP}
if ThemeServices.ThemesEnabled then
begin
ThemeServices.DrawElement(Canvas.Handle, ThemeServices.GetElementDetails(teEditTextNormal), SR);
InflateRect(SR, -2, -2);
Brush.Color := Blend(Self.Colors[Index].value, clBlack, 80);
FillRect(SR);
InflateRect(SR, -1, -1);
Brush.Color := Blend(Self.Colors[Index].value, clBlack, 90);
FillRect(SR);
InflateRect(SR, -1, -1);
Brush.Color := Self.Colors[Index].value;
FillRect(SR);
end
else
//windows 9x
begin
{$ENDIF}
Pen.Color := clBackground;
Brush.Color := clWindow;
Rectangle(SR);
InflateRect(SR, -1, -1);
FillRect(SR);
InflateRect(SR, 1, 1);
InflateRect(SR, -2, -2);
Brush.Color := Blend(Self.Colors[Index].value, clBlack, 75);
FillRect(SR);
InflateRect(SR, -1, -1);
Brush.Color := Blend(Self.Colors[Index].value, clBlack, 87);
FillRect(SR);
InflateRect(SR, -1, -1);
Brush.Color := Self.Colors[Index].value;
FillRect(SR);
{$IFDEF DELPHI_7_UP}
end;
{$ENDIF}
end
else
//not selected
begin
//windows XP
{$IFDEF DELPHI_7_UP}
if ThemeServices.ThemesEnabled then
begin
ThemeServices.DrawElement(Canvas.Handle, ThemeServices.GetElementDetails(teEditTextNormal), SR);
InflateRect(SR, -2, -2);
Brush.Color := Self.Colors[Index].value;
FillRect(SR);
end
else
//windows 9x
begin
{$ENDIF}
DrawEdge(Canvas.Handle, SR, BDR_SUNKENOUTER, BF_RECT);
InflateRect(SR, -2, -2);
Brush.Color := Self.Colors[Index].value;
Pen.Color := clBlack;
Rectangle(SR);
InflateRect(SR, -1, -1);
FillRect(SR);
InflateRect(SR, 1, 1);
{$IFDEF DELPHI_7_UP}
end;
{$ENDIF}
end;
//names
Font.Style := [fsBold];
if Selected then
begin
Brush.Color := clHighlightText;
Pen.Color := clHighlightText;
end
else
begin
Brush.Color := clWindowText;
Pen.Color := clWindowText;
end;
TR := Rect(R.Left + 48, R.Top + (48 - TextHeight(itemText)) div 2, R.Right - 15, R.Bottom);
if Assigned(FDraw) then FDraw(Self, Index, Canvas.Font, itemText, Selected);
DrawText(Canvas.Handle, PChar(itemText), Length(itemText), TR, DT_LEFT or DT_NOCLIP or DT_END_ELLIPSIS);
if R.Right > 60 then
begin
if Expanded then
DoArrow(Canvas, sdDown, Point(R.Right - 13, R.Top + 20), selected)
else
DoArrow(Canvas, sdRight, Point(R.Right - 10, R.Top + 18), selected);
end;
end;
end;
procedure TmbColorTree.DrawInfoItem(R: TRect; Index: integer);
var
b: TBitmap;
BR, TR: TRect;
i, fx: integer;
s: string;
begin
b := TBitmap.Create;
try
b.Width := R.Right - R.Left;
b.Height := R.Bottom - R.Top;
BR := b.Canvas.ClipRect;
b.Canvas.Font.Assign(Font);
with b.Canvas do
begin
Brush.Color := Blend(clBtnFace, clWindow, 30);
FillRect(BR);
BR := Rect(BR.Left + 42, BR.Top, BR.Right, BR.Bottom);
Brush.Color := clWindow;
FillRect(BR);
Inc(BR.Left, 6);
Font.Style := [];
Font.Size := 7;
s := FInfoLabel;
TR := Rect(BR.Left, BR.Top + 2, BR.Right, BR.Top + 12);
if Assigned(FDraw1) then FDraw1(Self, Index, Canvas.Font, s);
DrawText(b.Canvas.Handle, PChar(s), Length(s), TR, DT_LEFT or DT_END_ELLIPSIS or DT_NOCLIP);
fX := BR.Left;
for i := 0 to (BR.Right - 2 - BR.Left) div 2 do
begin
Pixels[fX, BR.Top + 4 + TextHeight(s)] := clGray;
fX := fX + 2;
end;
s := FormatHint(FInfo1, Self.Colors[Index].value);
TR := Rect(BR.Left, BR.Top + (BR.Bottom - BR.Top) div 3 + 2, BR.Right, BR.Top + 12);
if Assigned(FDraw2) then FDraw2(Self, Index, Canvas.Font, s);
DrawText(b.Canvas.Handle, PChar(s), Length(s), TR, DT_LEFT or DT_END_ELLIPSIS or DT_NOCLIP);
fX := BR.Left;
for i := 0 to (BR.Right - 2 - BR.Left) div 2 do
begin
Pixels[fX, BR.Top + (BR.Bottom - BR.Top) div 3 + 4 + TextHeight(s)] := clGray;
fX := fX + 2;
end;
s := FormatHint(FInfo2, Self.Colors[Index].value);
TR := Rect(BR.Left, BR.Top + 2*((BR.Bottom - BR.Top) div 3) + 2, BR.Right, BR.Top + 12);
if Assigned(FDraw3) then FDraw3(Self, Index, Canvas.Font, s);
DrawText(b.Canvas.Handle, PChar(s), Length(s), TR, DT_LEFT or DT_END_ELLIPSIS or DT_NOCLIP);
end;
Canvas.Draw(R.Left, R.Top, b);
finally
b.Free;
end;
end;
function TmbColorTree.IsCustomDrawn(Target: TCustomDrawTarget; Stage: TCustomDrawStage): Boolean;
begin
Result := true;
end;
procedure TmbColorTree.SetInfoLabel(Value: string);
begin
if FInfoLabel <> Value then
begin
FInfoLabel := Value;
Invalidate;
end;
end;
procedure TmbColorTree.SetInfo1(Value: string);
begin
if FInfo1 <> Value then
begin
FInfo1 := Value;
Invalidate;
end;
end;
procedure TmbColorTree.SetInfo2(Value: string);
begin
if FInfo2 <> Value then
begin
FInfo2 := Value;
Invalidate;
end;
end;
procedure TmbColorTree.AddColor(Name: string; Value: TColor; refresh: boolean = true);
var
l: integer;
begin
l := Length(Colors);
SetLength(Colors, l + 1);
Colors[l].name := Name;
Colors[l].value := Value;
if refresh then
UpdateColors;
end;
procedure TmbColorTree.ClearColors;
begin
SetLength(Colors, 0);
UpdateColors;
end;
function TmbColorTree.ColorCount: integer;
begin
Result := Length(Colors);
end;
procedure TmbColorTree.DeleteColor(Index: integer; refresh: boolean = true);
var
i: integer;
begin
if Length(Colors) = 0 then
begin
raise Exception.Create('There''s nothing to delete! The length of the array is 0.');
Exit;
end;
if Index > Length(Colors) - 1 then
begin
raise Exception.Create(Format('List index out of bounds (%d)', [Index]));
Exit;
end;
for i := Index to Length(Colors) - 2 do
Colors[i] := Colors[i+1];
SetLength(Colors, Length(Colors) - 1);
if refresh then
UpdateColors;
end;
procedure TmbColorTree.DeleteColorByName(Name: string; All: boolean);
var
i: integer;
begin
for i := Length(Colors) - 1 downto 0 do
if SameText(Colors[i].name, Name) then
begin
DeleteColor(i, false);
if not All then
begin
UpdateColors;
Exit;
end;
end;
UpdateColors;
end;
procedure TmbColorTree.DeleteColorByValue(Value: TColor; All: boolean);
var
i: integer;
begin
for i := Length(Colors) - 1 downto 0 do
if Colors[i].Value = Value then
begin
DeleteColor(i, false);
if not All then
begin
UpdateColors;
Exit;
end;
end;
UpdateColors;
end;
procedure TmbColorTree.InsertColor(Index: integer; Name: string; Value: TColor);
var
i: integer;
begin
if Index > Length(Colors) - 1 then
begin
raise Exception.Create(Format('List index out of bounds (%d)', [Index]));
Exit;
end;
SetLength(Colors, Length(Colors) + 1);
for i := Length(Colors) - 1 downto Index do
Colors[i] := Colors[i-1];
Colors[Index].Name := Name;
Colors[Index].Value := Value;
UpdateColors;
end;
procedure TmbColorTree.CMHintShow(var Message: TCMHintShow);
var
Handled: boolean;
i: integer;
n: TTreeNode;
begin
if PtInRect(ClientRect, Point(mx, my)) and ShowHint and not Dragging then
begin
n := GetNodeAt(mx, my);
if n <> nil then
begin
if not n.HasChildren then
i := n.Parent.Index
else
i := n.Index;
with TCMHintShow(Message) do
if not ShowHint then
Message.Result := 1
else
with HintInfo^ do
begin
Result := 0;
ReshowTimeout := 2000;
HideTimeout := 1000;
Handled := false;
if Assigned(FGetHint) then FGetHint(i, HintStr, Handled);
if Handled then
HintStr := FormatHint(HintStr, Colors[i].Value)
else
HintStr := Colors[i].Name;
end;
end;
end;
inherited;
end;
end.