5,388
社区成员
发帖
与我相关
我的任务
分享
//透明Panel
TTransparentPanel=class(TPanel)
protected
procedure Paint; override;
procedure WMEraseBkgnd(var Message: TMessage); message WM_ERASEBKGND;
procedure WMMove(var Message: TWMMove); Message WM_Move;
procedure AlignControls(AControl: TControl; var Rect: TRect); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure CreateParams(var Params: TCreateParams); override;
procedure Invalidate;override;
end;
{ TTransparentPanel }
procedure TTransparentPanel.AlignControls(AControl: TControl; var Rect: TRect);
begin
inherited;
Invalidate;
end;
constructor TTransparentPanel.Create(AOwner: TComponent);
begin
inherited;
ControlStyle := ControlStyle - [csSetCaption];
ControlStyle := ControlStyle - [csOpaque];
end;
procedure TTransparentPanel.CreateParams(var Params: TCreateParams);
begin
inherited;
with Params do
begin
ExStyle := ExStyle or WS_EX_TRANSPARENT;
end;
end;
destructor TTransparentPanel.Destroy;
begin
inherited Destroy;
end;
procedure TTransparentPanel.Invalidate;
var
Rect: TRect;
iLoop: Integer;
begin
if (Parent<>nil) and(Parent.HandleAllocated) then
begin
Rect := BoundsRect;
InvalidateRect(Parent.Handle,@Rect,False);
for iLoop := 0 to ControlCount- 1 do
Controls[iLoop].Invalidate;
end;
end;
procedure TTransparentPanel.Paint;
var
ARect: TRect;
TopColor, BottomColor: TColor;
procedure AdjustColors(Bevel: TPanelBevel);
begin
TopColor := clBtnHighlight;
if Bevel = bvLowered then TopColor := clBtnShadow;
BottomColor := clBtnShadow;
if Bevel = bvLowered then BottomColor := clBtnHighlight;
end;
begin
ARect := GetClientRect;
if BevelOuter <> bvNone then
begin
AdjustColors(BevelOuter);
Frame3D(Canvas, ARect, TopColor, BottomColor, BevelWidth);
end;
Frame3D(Canvas, ARect, Color, Color, BorderWidth);
if BevelInner <> bvNone then
begin
AdjustColors(BevelInner);
Frame3D(Canvas, ARect, TopColor, BottomColor, BevelWidth);
end;
Update;
end;
procedure TTransparentPanel.WMEraseBkgnd(var Message: TMessage);
begin
Message.Result := 1;
end;
procedure TTransparentPanel.WMMove(var Message: TWMMove);
begin
inherited;
Invalidate;
end;