Форум: "Начинающим";
Текущий архив: 2013.03.22;
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ВнизКак избавится от мерцания? Найти похожие ветки
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Jimmy (2012-04-06 14:46) [0]Подскажите как избавиться от мерцания при нажатии на следующую кнопку? Заранее спасибо!
unit DiDSuperButton;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, Buttons, ExtCtrls;
type
TDrawButtonEvent = procedure(Control: TWinControl; Rect: TRect; State: TOwnerDrawState) of object;
TDiDSuperButton = class(TButton)
private
FCanvas: TCanvas;
IsFocused: Boolean;
FColorMouse:TColor;
FLight :Boolean;
FOnDrawButton: TDrawButtonEvent;
protected
procedure CreateParams(var Params: TCreateParams); override;
procedure SetButtonStyle(ADefault: Boolean); override;
procedure CMEnabledChanged(var Message: TMessage); message CM_ENABLEDCHANGED;
procedure CMFontChanged(var Message: TMessage); message CM_FONTCHANGED;
procedure CNMeasureItem(var Message: TWMMeasureItem); message CN_MEASUREITEM;
procedure CNDrawItem(var Message: TWMDrawItem); message CN_DRAWITEM;
procedure WMLButtonDown (var Message: TWMLButtonDown); message WM_LBUTTONDOWN;
procedure WMLButtonUp (var Message: TWMLButtonUp); message WM_LBUTTONUP;
// procedure WMLPaint (var Message: TWMPaint); message WM_PAINT;
// procedure WMLEraseBKGND (var Message: TWMERASEBKGND); message WM_ERASEBKGND;
procedure DrawButton(Rect: TRect; State: UINT);
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
property Canvas: TCanvas read FCanvas;
published
property OnDrawButton: TDrawButtonEvent read FOnDrawButton write FOnDrawButton;
property Color;
property ColorMouse:TColor read FColorMouse write FColorMouse;
property Light :Boolean read FLight write FLight;
end;
procedure Register;
implementation
{------------------------------------------------------------------------------}
procedure Register;
begin
RegisterComponents("DiD", [TDiDSuperButton]);
end;
{------------------------------------------------------------------------------}
constructor TDiDSuperButton.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FCanvas := TCanvas.Create;
ControlStyle := ControlStyle + [csOpaque];
end;
{------------------------------------------------------------------------------}
destructor TDiDSuperButton.Destroy;
begin
inherited Destroy;
FCanvas.Free;
end;
{------------------------------------------------------------------------------}
procedure TDiDSuperButton.CreateParams(var Params: TCreateParams);
begin
inherited CreateParams(Params);
with Params do Style := Style or BS_OWNERDRAW;
end;
{------------------------------------------------------------------------------}
procedure TDiDSuperButton.SetButtonStyle(ADefault: Boolean);
begin
if ADefault <> IsFocused then
begin
IsFocused := ADefault;
Refresh;
end;
end;
{------------------------------------------------------------------------------}
procedure TDiDSuperButton.CNMeasureItem(var Message: TWMMeasureItem);
begin
with Message.MeasureItemStruct^ do
begin
itemWidth := Width;
itemHeight := Height;
end;
end;
{------------------------------------------------------------------------------}
procedure TDiDSuperButton.CNDrawItem(var Message: TWMDrawItem);
var
SaveIndex: Integer;
begin
with Message.DrawItemStruct^ do
begin
SaveIndex := SaveDC(hDC);
FCanvas.Lock;
try
FCanvas.Handle := hDC;
FCanvas.Font := Font;
FCanvas.Brush := Brush;
DrawButton(rcItem, itemState);
finally
FCanvas.Handle := 0;
FCanvas.Unlock;
RestoreDC(hDC, SaveIndex);
end;
end;
Message.Result := 1;
end;
{------------------------------------------------------------------------------}
procedure TDiDSuperButton.CMEnabledChanged(var Message: TMessage);
begin
inherited;
Invalidate;
end;
{------------------------------------------------------------------------------}
procedure TDiDSuperButton.CMFontChanged(var Message: TMessage);
begin
inherited;
Invalidate;
end;
{------------------------------------------------------------------------------}
procedure TDiDSuperButton.WMLButtonDown(var Message: TWMLButtonDown);
begin
inherited;
Invalidate;
end;
{------------------------------------------------------------------------------}
procedure TDiDSuperButton.WMLButtonUp(var Message: TWMLButtonUp);
begin
inherited;
Invalidate;
end;
{------------------------------------------------------------------------------}
{procedure TDiDSuperButton.WMLPaint(var Message: TWMPaint);
begin
//
end;
{------------------------------------------------------------------------------}
{procedure TDiDSuperButton.WMLERASEBKGND(var Message: TWMERASEBKGND);
begin
//
end;
{------------------------------------------------------------------------------}
procedure TDiDSuperButton.DrawButton(Rect: TRect; State: UINT);
var
IsDown: Boolean;
TB:TBitmap;
TR1:TRect;
begin
IsDown := State and ODS_SELECTED <> 0;
TB:=TBitmap.Create;
TB.Width :=Rect.Right -Rect.Left;
TB.Height:=Rect.Bottom-Rect.Top;
TB.Transparent:=True;
TR1.Left:=0; TR1.Right:=Rect.Right; TR1.Top:=0; TR1.Bottom:=Rect.Bottom;
TB.Canvas.CopyRect(TR1,FCanvas,TR1);
//Тут будет хитрый рисунок. Пока просто прямоугольник...
TB.Canvas.RoundRect(0,0,Width,Height-1,7,7);
if IsDown=False then FCanvas.Draw(0,0,TB) else FCanvas.Draw(1,1,TB);
//BitBlt(FCanvas.Handle, Rect.Left, Rect.Top, Rect.Right, Rect.Bottom,
// TB.Canvas.Handle, 0, 0, SrcCopy);
TB.Free;
end;
{------------------------------------------------------------------------------}
end.
← →
Jimmy (2012-04-06 15:23) [1]Вроде помогло одновременно три вещи:
DoubleBuffered := true;
ControlState := ControlState + [csOpaque];
procedure WMEraseBkgnd(var Message: TWmEraseBkgnd); message WM_ERASEBKGND;
begin
Message.Result := 1;
end;
Из ветки
http://delphimaster.net/view/5-1173025943/
Всем спасибо!
Страницы: 1 вся ветка
Форум: "Начинающим";
Текущий архив: 2013.03.22;
Скачать: [xml.tar.bz2];
Память: 0.47 MB
Время: 0.064 c