TImgEdit控件上放透明Panel 描述;在TImgEdit控件上放一个TRzPanel,设置TRzPanel为透明.TImgEdit载入tif图象文件后,TRzPanel并没有透明;拖动TImgEdit的滚动条,TRzPanel也没有透明。问题:在TImgEdit控件上放置一个什么样的Panel,可以使这个Panel透明显示TImgEdit控件载入的tif图象。谢谢!!! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 {******************************************************************************}{ @UnitName : uTransPanel,pas }{ @Author : Budded }{ @Description : 透明 Panel }{ @FileVersion : 1.0.0.0 }{ @CreateDate : 2005-08-24 }{ @LastUpdate : Budded, 2005-08-24 }{ @History : Created By Budded, 2005-08-24 10:20 }{******************************************************************************}unit uTransPanel;interfaceuses Windows, Messages, SysUtils, Graphics, Classes, Controls, ExtCtrls, Buttons;type TTransMode = (tmNone, tmSRCCOPY, tmSRCPAINT, tmSRCAND, tmSRCINVERT, tmSRCERASE, tmNOTSRCCOPY, tmNOTSRCERASE, tmMERGECOPY, tmMERGEPAINT, tmPATCOPY, tmPATPAINT, tmPATINVERT, tmDSTINVERT, tmBLACKNESS, tmWHITENESS); TTransPanel = class(TPanel) private { Private declarations } FTransMode: TTransMode; procedure CMCtl3DChanged(var Message: TMessage); message CM_CTL3DCHANGED; procedure WMEraseBkgnd(var Message: TMessage); message WM_ERASEBKGND; procedure WMWindowPosChanging(var Message: TWMWindowPosChanging); message WM_WINDOWPOSCHANGING; function GetTransModeEx: Integer; protected { Protected declarations } Buffer: TBitmap; procedure CreateParams(var Params: TCreateParams); override; procedure Paint; override; procedure Resize; override; public { Public declarations } constructor Create(AOwner: TComponent); override; destructor Destroy(); override; property TransModeEx: Integer read GetTransModeEx; published { Published declarations } property TransMode: TTransMode read FTransMode write FTransMode default tmSRCCOPY; end;procedure Register;implementationprocedure Register;begin RegisterComponents('Budded', [TTransPanel]);end;{ TTransPanel }procedure TTransPanel.CMCtl3DChanged(var Message: TMessage);begin inherited; RecreateWnd;end;constructor TTransPanel.Create(AOwner: TComponent);begin inherited; Buffer := TBitmap.Create; FTransMode := tmSRCCOPY;end;procedure TTransPanel.CreateParams(var Params: TCreateParams);begin inherited; Params.ExStyle := Params.ExStyle + WS_EX_TRANSPARENT;end;destructor TTransPanel.Destroy;begin if Assigned(Buffer) then Buffer.Free; inherited;end;function TTransPanel.GetTransModeEx: Integer;begin Result := 0; case TransMode of //case tmNone: Result := 0; tmSRCCOPY: Result := SRCCOPY; tmSRCPAINT: Result := SRCPAINT; tmSRCAND: Result := SRCAND; tmSRCINVERT: Result := SRCINVERT; tmSRCERASE: Result := SRCERASE; tmNOTSRCCOPY: Result := NOTSRCCOPY; tmNOTSRCERASE: Result := NOTSRCERASE; tmMERGECOPY: Result := MERGECOPY; tmMERGEPAINT: Result := MERGEPAINT; tmPATCOPY: Result := PATCOPY; tmPATPAINT: Result := PATPAINT; tmPATINVERT: Result := PATINVERT; tmDSTINVERT: Result := DSTINVERT; tmBLACKNESS: Result := BLACKNESS; tmWHITENESS: Result := WHITENESS; end; // end caseend;procedure TTransPanel.Paint;var Rect: 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// inherited; Rect := ClientRect;//Rect(0, 0, Width, Height); Buffer.Width := Width; Buffer.Height := Height; Buffer.Canvas.Brush.Style := bsSolid; Buffer.Canvas.Brush.Color := Color; Buffer.Canvas.FillRect(Rect); StretchBlt(Buffer.Canvas.Handle, 0, 0, Width, Height, Canvas.Handle, 0, 0, Width, Height, TransModeEx); if Ctl3D then DrawEdge(Buffer.Canvas.Handle, Rect, BDR_RAISEDINNER, BF_RECT); if BevelOuter <> bvNone then begin AdjustColors(BevelOuter); Frame3D(Buffer.Canvas, Rect, TopColor, BottomColor, BevelWidth); end; if BevelInner <> bvNone then begin AdjustColors(BevelInner); Frame3D(Buffer.Canvas, Rect, TopColor, BottomColor, BevelWidth); end; Buffer.Canvas.Pen.Mode := pmCopy; Buffer.Canvas.Pen.Style := psSolid; Canvas.Draw(0, 0, Buffer);end;procedure TTransPanel.Resize;begin inherited;end;procedure TTransPanel.WMEraseBkgnd(var Message: TMessage);begin Message.Result := 0;end;procedure TTransPanel.WMWindowPosChanging(var Message: TWMWindowPosChanging);begin Invalidate; inherited;end;end.唉,还是好几年前的东西了, 关于自定义控件添加TBitmap变量的问题 此段很简单的代码,但总是报错。 关于ado多线程的问题,请大家帮忙看看 如何屏蔽掉SUIPack 控件所带form的标题栏消息 很多安装程序运行时,有个全屏幕的蓝色或其他色的背景。用installshield如何做? 关于冰河的后继版本的疑惑…… 关于‘/’与div的小问题 想问一下,我把一个程序做完安装程序了,也能使用了,但是在安装目录里面我所有我的程序文件与库文件都原本不动地在安装目录里了,如何办呀 水平考试很快就到了、但脑里一片空白 代码出错 如何以SYSTEM权限运行某个函数? dbgrid的使用问题。。
{ @UnitName : uTransPanel,pas }
{ @Author : Budded }
{ @Description : 透明 Panel }
{ @FileVersion : 1.0.0.0 }
{ @CreateDate : 2005-08-24 }
{ @LastUpdate : Budded, 2005-08-24 }
{ @History : Created By Budded, 2005-08-24 10:20 }
{******************************************************************************}
unit uTransPanel;interfaceuses
Windows, Messages, SysUtils, Graphics, Classes, Controls, ExtCtrls, Buttons;type
TTransMode = (tmNone, tmSRCCOPY, tmSRCPAINT, tmSRCAND, tmSRCINVERT, tmSRCERASE,
tmNOTSRCCOPY, tmNOTSRCERASE, tmMERGECOPY, tmMERGEPAINT,
tmPATCOPY, tmPATPAINT, tmPATINVERT, tmDSTINVERT, tmBLACKNESS, tmWHITENESS); TTransPanel = class(TPanel)
private
{ Private declarations }
FTransMode: TTransMode; procedure CMCtl3DChanged(var Message: TMessage); message CM_CTL3DCHANGED;
procedure WMEraseBkgnd(var Message: TMessage); message WM_ERASEBKGND;
procedure WMWindowPosChanging(var Message: TWMWindowPosChanging); message WM_WINDOWPOSCHANGING;
function GetTransModeEx: Integer;
protected
{ Protected declarations }
Buffer: TBitmap;
procedure CreateParams(var Params: TCreateParams); override;
procedure Paint; override;
procedure Resize; override;
public
{ Public declarations }
constructor Create(AOwner: TComponent); override;
destructor Destroy(); override;
property TransModeEx: Integer read GetTransModeEx;
published
{ Published declarations }
property TransMode: TTransMode read FTransMode write FTransMode default tmSRCCOPY;
end;procedure Register;implementationprocedure Register;
begin
RegisterComponents('Budded', [TTransPanel]);
end;{ TTransPanel }procedure TTransPanel.CMCtl3DChanged(var Message: TMessage);
begin
inherited;
RecreateWnd;
end;constructor TTransPanel.Create(AOwner: TComponent);
begin
inherited;
Buffer := TBitmap.Create;
FTransMode := tmSRCCOPY;
end;procedure TTransPanel.CreateParams(var Params: TCreateParams);
begin
inherited;
Params.ExStyle := Params.ExStyle + WS_EX_TRANSPARENT;
end;destructor TTransPanel.Destroy;
begin
if Assigned(Buffer) then
Buffer.Free;
inherited;
end;function TTransPanel.GetTransModeEx: Integer;
begin
Result := 0;
case TransMode of //case
tmNone: Result := 0;
tmSRCCOPY: Result := SRCCOPY;
tmSRCPAINT: Result := SRCPAINT;
tmSRCAND: Result := SRCAND;
tmSRCINVERT: Result := SRCINVERT;
tmSRCERASE: Result := SRCERASE;
tmNOTSRCCOPY: Result := NOTSRCCOPY;
tmNOTSRCERASE: Result := NOTSRCERASE;
tmMERGECOPY: Result := MERGECOPY;
tmMERGEPAINT: Result := MERGEPAINT;
tmPATCOPY: Result := PATCOPY;
tmPATPAINT: Result := PATPAINT;
tmPATINVERT: Result := PATINVERT;
tmDSTINVERT: Result := DSTINVERT;
tmBLACKNESS: Result := BLACKNESS;
tmWHITENESS: Result := WHITENESS;
end; // end case
end;procedure TTransPanel.Paint;
var
Rect: 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
// inherited; Rect := ClientRect;//Rect(0, 0, Width, Height);
Buffer.Width := Width;
Buffer.Height := Height;
Buffer.Canvas.Brush.Style := bsSolid;
Buffer.Canvas.Brush.Color := Color;
Buffer.Canvas.FillRect(Rect);
StretchBlt(Buffer.Canvas.Handle, 0, 0, Width, Height,
Canvas.Handle, 0, 0, Width, Height, TransModeEx); if Ctl3D then DrawEdge(Buffer.Canvas.Handle, Rect, BDR_RAISEDINNER, BF_RECT); if BevelOuter <> bvNone then
begin
AdjustColors(BevelOuter);
Frame3D(Buffer.Canvas, Rect, TopColor, BottomColor, BevelWidth);
end;
if BevelInner <> bvNone then
begin
AdjustColors(BevelInner);
Frame3D(Buffer.Canvas, Rect, TopColor, BottomColor, BevelWidth);
end; Buffer.Canvas.Pen.Mode := pmCopy;
Buffer.Canvas.Pen.Style := psSolid; Canvas.Draw(0, 0, Buffer);
end;procedure TTransPanel.Resize;
begin
inherited;
end;procedure TTransPanel.WMEraseBkgnd(var Message: TMessage);
begin
Message.Result := 0;
end;procedure TTransPanel.WMWindowPosChanging(var Message: TWMWindowPosChanging);
begin
Invalidate;
inherited;
end;end.
唉,还是好几年前的东西了,