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TFlatGroupBoxUnit.pas
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TFlatGroupBoxUnit.pas
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unit TFlatGroupBoxUnit;
interface
{$I DFS.inc}
uses
Windows, Messages, SysUtils, Forms, Classes, Graphics, Controls, ExtCtrls, FlatUtilitys;
type
TFlatGroupBox = class(TCustomControl)
private
FTransparent: Boolean;
FUseAdvColors: Boolean;
FAdvColorBorder: TAdvColors;
FBorderColor: TColor;
FBorder: TGroupBoxBorder;
procedure SetAdvColors (Index: Integer; Value: TAdvColors);
procedure SetUseAdvColors (Value: Boolean);
procedure CMEnabledChanged (var Message: TMessage); message CM_ENABLEDCHANGED;
procedure CMTextChanged (var Message: TWmNoParams); message CM_TEXTCHANGED;
procedure SetColors(const Index: Integer; const Value: TColor);
procedure SetBorder(const Value: TGroupBoxBorder);
procedure CMSysColorChange (var Message: TMessage); message CM_SYSCOLORCHANGE;
procedure CMParentColorChanged (var Message: TWMNoParams); message CM_PARENTCOLORCHANGED;
procedure CMDialogChar (var Message: TCMDialogChar); message CM_DIALOGCHAR;
procedure WMSize (var Message: TWMSize); message WM_SIZE;
procedure WMMove (var Message: TWMMove); message WM_MOVE;
procedure SetTransparent (const Value: Boolean);
protected
procedure CalcAdvColors;
procedure Paint; override;
{$IFDEF DFS_COMPILER_4_UP}
procedure SetBiDiMode(Value: TBiDiMode); override;
{$ENDIF}
public
constructor Create (AOwner: TComponent); override;
published
property Transparent: Boolean read FTransparent write SetTransparent default false;
property Align;
property Cursor;
property Caption;
property Font;
property ParentFont;
property Color;
property ParentColor;
property PopupMenu;
property ShowHint;
property ParentShowHint;
property Enabled;
property Visible;
property TabOrder;
property TabStop;
property Hint;
property HelpContext;
property ColorBorder: TColor index 0 read FBorderColor write SetColors default $008396A0;
property Border: TGroupBoxBorder read FBorder write SetBorder default brFull;
property AdvColorBorder: TAdvColors index 0 read FAdvColorBorder write SetAdvColors default 50;
property UseAdvColors: Boolean read FUseAdvColors write SetUseAdvColors default false;
{$IFDEF DFS_COMPILER_4_UP}
property Anchors;
property BiDiMode write SetBidiMode;
property Constraints;
property DragKind;
property DragMode;
property DragCursor;
property ParentBiDiMode;
property DockSite;
property OnEndDock;
property OnStartDock;
property OnDockDrop;
property OnDockOver;
property OnGetSiteInfo;
property OnUnDock;
{$ENDIF}
{$IFDEF DFS_DELPHI_5_UP}
property OnContextPopup;
{$ENDIF}
property OnClick;
property OnDblClick;
property OnDragDrop;
property OnDragOver;
property OnEndDrag;
property OnEnter;
property OnExit;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
property OnStartDrag;
end;
implementation
{ TFlatGroupBox }
constructor TFlatGroupBox.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
ControlStyle := ControlStyle + [csAcceptsControls, csOpaque];
FBorderColor := $008396A0;
FAdvColorBorder := 50;
SetBounds(0, 0, 185, 105);
end;
procedure TFlatGroupBox.Paint;
var
memoryBitmap: TBitmap;
borderRect, textBounds: TRect;
textHeight, textWidth: integer;
Format: UINT;
begin
borderRect := ClientRect;
{$IFDEF DFS_COMPILER_4_UP}
if BidiMode = bdRightToLeft then
Format := DT_TOP or DT_RIGHT or DT_SINGLELINE
else
Format := DT_TOP or DT_LEFT or DT_SINGLELINE;
{$ELSE}
Format := DT_TOP or DT_LEFT or DT_SINGLELINE;
{$ENDIF}
memoryBitmap := TBitmap.Create; // create memory-bitmap to draw flicker-free
try
memoryBitmap.Height := ClientRect.Bottom;
memoryBitmap.Width := ClientRect.Right;
memoryBitmap.Canvas.Font := Self.Font;
textHeight := memoryBitmap.canvas.TextHeight(caption);
textWidth := memoryBitmap.Canvas.TextWidth(caption);
{$IFDEF DFS_COMPILER_4_UP}
if BidiMode = bdRightToLeft then
textBounds := Rect(ClientRect.Right - 10 - textWidth, ClientRect.Top,
ClientRect.Right - 10 , ClientRect.Top + textHeight)
else
textBounds := Rect(ClientRect.Left + 10, ClientRect.Top,
ClientRect.Left + 10 + textWidth,
ClientRect.Top + textHeight);
{$ELSE}
textBounds := Rect(ClientRect.Left + 10, ClientRect.Top,
ClientRect.Left + 10 + textWidth,
ClientRect.Top + textHeight);
{$ENDIF}
textBounds := Rect(ClientRect.Left + 10, ClientRect.Top,
ClientRect.Right - 10,
ClientRect.Top + textHeight);
// Draw Background
if FTransparent then
DrawParentImage(Self, memoryBitmap.Canvas)
else
begin
memoryBitmap.Canvas.Brush.Color := Self.Color;
memoryBitmap.Canvas.FillRect(ClientRect);
end;
// Draw Border
memoryBitmap.Canvas.Pen.Color := FBorderColor;
case FBorder of
brFull:
{$IFDEF DFS_COMPILER_4_UP}
if BidiMode = bdRightToLeft then
memoryBitmap.Canvas.Polyline([Point(ClientRect.Right - 15 - textWidth, ClientRect.top + (textHeight div 2)),
Point(ClientRect.left, ClientRect.top + (textHeight div 2)),
Point(ClientRect.left, ClientRect.bottom-1), Point(ClientRect.right-1, ClientRect.bottom-1),
Point(ClientRect.right-1, ClientRect.top + (textHeight div 2)),
Point(ClientRect.Right - 7 , ClientRect.top + (textHeight div 2))])
else
memoryBitmap.Canvas.Polyline([Point(ClientRect.left + 5, ClientRect.top + (textHeight div 2)),
Point(ClientRect.left, ClientRect.top + (textHeight div 2)),
Point(ClientRect.left, ClientRect.bottom-1), Point(ClientRect.right-1, ClientRect.bottom-1),
Point(ClientRect.right-1, ClientRect.top + (textHeight div 2)),
Point(ClientRect.left + 12 + textWidth, ClientRect.top + (textHeight div 2))]);
{$ELSE}
memoryBitmap.Canvas.Polyline([Point(ClientRect.left + 5, ClientRect.top + (textHeight div 2)),
Point(ClientRect.left, ClientRect.top + (textHeight div 2)),
Point(ClientRect.left, ClientRect.bottom-1), Point(ClientRect.right-1, ClientRect.bottom-1),
Point(ClientRect.right-1, ClientRect.top + (textHeight div 2)),
Point(ClientRect.left + 12 + textWidth, ClientRect.top + (textHeight div 2))]);
{$ENDIF}
brOnlyTopLine:
{$IFDEF DFS_COMPILER_4_UP}
if BidiMode = bdRightToLeft then
begin
memoryBitmap.Canvas.Polyline([Point(ClientRect.right - 5, ClientRect.top + (textHeight div 2)), Point(ClientRect.right, ClientRect.top + (textHeight div 2))]);
memoryBitmap.Canvas.Polyline([Point(ClientRect.left+1, ClientRect.top + (textHeight div 2)), Point(ClientRect.right - 12 - textWidth, ClientRect.top + (textHeight div 2))]);
end
else
begin
memoryBitmap.Canvas.Polyline([Point(ClientRect.left + 5, ClientRect.top + (textHeight div 2)), Point(ClientRect.left, ClientRect.top + (textHeight div 2))]);
memoryBitmap.Canvas.Polyline([Point(ClientRect.right-1, ClientRect.top + (textHeight div 2)), Point(ClientRect.left + 12 + textWidth, ClientRect.top + (textHeight div 2))]);
end;
{$ELSE}
begin
memoryBitmap.Canvas.Polyline([Point(ClientRect.left + 5, ClientRect.top + (textHeight div 2)), Point(ClientRect.left, ClientRect.top + (Canvas.textHeight(caption) div 2))]);
memoryBitmap.Canvas.Polyline([Point(ClientRect.right-1, ClientRect.top + (textHeight div 2)), Point(ClientRect.left + 12 + textWidth, ClientRect.top + (textHeight div 2))]);
end;
{$ENDIF}
end;
// Draw Text
memoryBitmap.Canvas.Brush.Style := bsClear;
if not Enabled then
begin
OffsetRect(textBounds, 1, 1);
memoryBitmap.Canvas.Font.Color := clBtnHighlight;
DrawText(memoryBitmap.Canvas.Handle, PChar(Caption), Length(Caption), textBounds, Format);
OffsetRect(textBounds, -1, -1);
memoryBitmap.Canvas.Font.Color := clBtnShadow;
DrawText(memoryBitmap.Canvas.Handle, PChar(Caption), Length(Caption), textBounds, Format);
end
else
DrawText(memoryBitmap.Canvas.Handle, PChar(Caption), Length(Caption), textBounds, Format);
// Copy memoryBitmap to screen
canvas.CopyRect(ClientRect, memoryBitmap.canvas, ClientRect);
finally
memoryBitmap.free; // delete the bitmap
end;
end;
procedure TFlatGroupBox.CMTextChanged (var Message: TWmNoParams);
begin
inherited;
Invalidate;
end;
procedure TFlatGroupBox.SetColors(const Index: Integer;
const Value: TColor);
begin
case Index of
0: FBorderColor := Value;
end;
Invalidate;
end;
procedure TFlatGroupBox.SetBorder(const Value: TGroupBoxBorder);
begin
FBorder := Value;
Invalidate;
end;
procedure TFlatGroupBox.SetAdvColors(Index: Integer; Value: TAdvColors);
begin
case Index of
0: FAdvColorBorder := Value;
end;
CalcAdvColors;
Invalidate;
end;
procedure TFlatGroupBox.SetUseAdvColors(Value: Boolean);
begin
if Value <> FUseAdvColors then
begin
FUseAdvColors := Value;
ParentColor := Value;
CalcAdvColors;
Invalidate;
end;
end;
procedure TFlatGroupBox.CalcAdvColors;
begin
if FUseAdvColors then
begin
FBorderColor := CalcAdvancedColor(Color, FBorderColor, FAdvColorBorder, darken);
end;
end;
procedure TFlatGroupBox.CMParentColorChanged(var Message: TWMNoParams);
begin
inherited;
if FUseAdvColors then
begin
ParentColor := True;
CalcAdvColors;
end;
Invalidate;
end;
procedure TFlatGroupBox.CMSysColorChange(var Message: TMessage);
begin
if FUseAdvColors then
begin
ParentColor := True;
CalcAdvColors;
end;
Invalidate;
end;
procedure TFlatGroupBox.CMDialogChar(var Message: TCMDialogChar);
begin
with Message do
if IsAccel(Message.CharCode, Caption) and CanFocus then
begin
SetFocus;
Result := 1;
end;
end;
procedure TFlatGroupBox.CMEnabledChanged(var Message: TMessage);
begin
inherited;
Invalidate;
end;
procedure TFlatGroupBox.SetTransparent(const Value: Boolean);
begin
FTransparent := Value;
Invalidate;
end;
procedure TFlatGroupBox.WMMove(var Message: TWMMove);
begin
inherited;
if FTransparent then
Invalidate;
end;
procedure TFlatGroupBox.WMSize(var Message: TWMSize);
begin
inherited;
if FTransparent then
Invalidate;
end;
{$IFDEF DFS_COMPILER_4_UP}
procedure TFlatGroupBox.SetBiDiMode(Value: TBiDiMode);
begin
inherited;
Invalidate;
end;
{$ENDIF}
end.