PageControl元件如何透通？ |
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答題得分者是：hagar
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Clarinet
高階會員   發表：9 回覆：97 積分：126 註冊：2002-05-08 發送簡訊給我 |
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hagar
版主  發表：143 回覆：4056 積分：4445 註冊：2002-04-14 發送簡訊給我 |
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Clarinet
高階會員 發表：9 回覆：97 積分：126 註冊：2002-05-08 發送簡訊給我 |
引言: http://delphi.ktop.com.tw/topic.php?TOPIC_ID=28788 http://delphi.ktop.com.tw/topic.php?TOPIC_ID=28827 --- --<-<-<@感謝hagar大大的回覆！十分感謝！< > 不過，這些不是我要的結果< >，因為它們都是透通至DeskTop！ 我的需求是希望能達到如TLabel、TSpeedButton的Transparent的效果！ 我目前的解決方法是在每個TabSheet上都放一個TImage元件，然後，用複製的方法，複製Main Form上的底圖的相對位置，來做到類似透通的樣子！ 而PageControl自已本身已有Canvas屬性，所以就直接用相同的方法來達到！ 不過，pagecontrol卻有一個小麻煩，就是當有其他的程式、Form或messageDlg之類的檔在其前頭時，pagecontrol並不會重畫。 所以，就又用了另一個覺得不好的解決方法。就是放一個TTimer元件，每秒鐘重畫pagecontrol.Canvas，來達到！ 上面這個方法雖然解決了我的需求，但覺得並不是一個很好的方法！
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GPS（全球衛星定位系統） http://www.allgps.com |
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hagar
版主 發表：143 回覆：4056 積分：4445 註冊：2002-04-14 發送簡訊給我 |
參考: http://www.experts-exchange.com/Programming/Programming_Languages/Delphi/Q_10262786.html
example1
unit Unit1; interface uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, OleCtrls,ComCtrls; type
TForm1 = class(TForm)
Button1: TButton;
PageControl1: TPageControl;
TabSheet1: TTabSheet;
TabSheet2: TTabSheet;
TabSheet3: TTabSheet;
TabSheet4: TTabSheet;
RadioButton1: TRadioButton; //component on tabsheet1
RadioButton2: TRadioButton; //component on tabsheet1
CheckBox1: TCheckBox; //component on tabsheet2
CheckBox2: TCheckBox; //component on tabsheet2
Memo1: TMemo; //component on tabsheet3
DateTimePicker1: TDateTimePicker; //component on tabsheet4
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end; var
Form1: TForm1;
Background: TBitmap;
implementation {$R *.DFM} procedure TForm1.Button1Click(Sender: TObject);
begin
close
end; Function TabWndProc( wnd: HWND; msg: Cardinal;
wparam: WPARAM; lparam: LPARAM ): Integer; stdcall;
var
canvas: TCanvas;
x, y: Integer;
r: TRect;
OldTabWndProc: Pointer;
begin
If Msg = WM_ERASEBKGND Then Begin
// tile window background with bitmap
Result := 1;
GetClientRect( wnd, r );
canvas:= TCanvas.Create;
try
canvas.handle := HDC( wparam );
y := 0;
While y < r.Bottom Do Begin
x:= 0;
While x < r.right Do Begin
canvas.Draw( x, y, Background );
Inc( x, Background.Width );
End;
Inc( y, Background.Height );
End;
finally
canvas.handle := 0;
canvas.free;
end;
End
Else Begin
// pass message to old window proc
OldTabWndProc := Pointer( GetWindowLong( wnd, GWL_USERDATA )); Result := CallWindowProc( OldTabWndProc, wnd, msg, wparam, lparam );
End;
end; procedure TForm1.FormCreate(Sender: TObject);
var
i: integer;
begin
Background := TBitmap.Create;
// could load bitmap from a resource here
Background.Loadfromfile('C:\WINDOWS\KUGELN.BMP'); // subclass the tabsheets, store old window proc in GWL_USERDATA // field of window structure
For i:= 0 to pagecontrol1.PageCount-1 do
SetWindowLong( pagecontrol1.Pages[i].handle, GWL_USERDATA,
SetWindowLong(pagecontrol1.Pages[i].handle,
GWL_WNDPROC, Integer(@TabWndProc)));
end; procedure TForm1.FormDestroy(Sender: TObject);
begin
Background.Free;
end; end.
example2
unit Unit1; interface uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, OleCtrls,ComCtrls; type
TForm1 = class(TForm)
Button1: TButton;
PageControl1: TPageControl;
TabSheet1: TTabSheet;
TabSheet2: TTabSheet;
TabSheet3: TTabSheet;
TabSheet4: TTabSheet;
RadioButton1: TRadioButton; //component on tabsheet1
RadioButton2: TRadioButton; //component on tabsheet1
CheckBox1: TCheckBox; //component on tabsheet2
CheckBox2: TCheckBox; //component on tabsheet2
Memo1: TMemo; //component on tabsheet3
DateTimePicker1: TDateTimePicker; //component on tabsheet4
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure PageControl1DrawTab(Control: TCustomTabControl;
TabIndex: Integer; const Rect: TRect; Active: Boolean);
private
{ Private declarations }
FOldPageCOntrolWndProc: TWndMethod;
procedure PageControlWndProc( Var Msg: TMessage );
public
{ Public declarations }
end; var
Form1: TForm1;
Background: TBitmap;
implementation {$R *.DFM} procedure TForm1.Button1Click(Sender: TObject);
begin
close
end; Function TabWndProc( wnd: HWND; msg: Cardinal;
wparam: WPARAM; lparam: LPARAM ): Integer; stdcall;
var
canvas: TCanvas;
x, y: Integer;
r: TRect;
OldTabWndProc: Pointer;
begin
If Msg = WM_ERASEBKGND Then Begin
// tile window background with bitmap
Result := 1;
GetClientRect( wnd, r );
canvas:= TCanvas.Create;
try
canvas.handle := HDC( wparam );
y := 0;
While y < r.Bottom Do Begin
x:= 0;
While x < r.right Do Begin
canvas.Draw( x, y, Background );
Inc( x, Background.Width );
End;
Inc( y, Background.Height );
End;
finally
canvas.handle := 0;
canvas.free;
end;
End
Else Begin
// pass message to old window proc
OldTabWndProc := Pointer( GetWindowLong( wnd, GWL_USERDATA )); Result := CallWindowProc( OldTabWndProc, wnd, msg, wparam, lparam );
End;
end; procedure TForm1.FormCreate(Sender: TObject);
var
i: integer;
begin
Background := TBitmap.Create;
// could load bitmap from a resource here
Background.Loadfromfile('C:\WINDOWS\KUGELN.BMP'); // subclass the tabsheets, store old window proc in GWL_USERDATA // field of window structure
For i:= 0 to pagecontrol1.PageCount-1 do
SetWindowLong( pagecontrol1.Pages[i].handle, GWL_USERDATA,
SetWindowLong(pagecontrol1.Pages[i].handle,
GWL_WNDPROC, Integer(@TabWndProc)));
FoldPageControlWndProc := Pagecontrol1.WindowProc;
Pagecontrol1.WindowProc := PageControlWndProc;
end; procedure TForm1.FormDestroy(Sender: TObject);
begin
Background.Free;
end; procedure TForm1.PageControlWndProc(var Msg: TMessage);
var
canvas: TCanvas;
x, y: Integer;
r: TRect;
begin
If msg.Msg = WM_ERASEBKGND Then Begin
msg.Result := 1;
r:= pagecontrol1.clientrect;
canvas:= TCanvas.Create;
try
canvas.handle := HDC(msg.wparam);
y := 0;
While y < r.Bottom Do Begin
x:= 0;
While x < r.right Do Begin
canvas.Draw( x, y, Background );
Inc( x, Background.Width );
End;
Inc( y, Background.Height );
End;
finally
canvas.handle := 0;
canvas.free;
end;
End
Else
FOldPageControlWndProc( Msg );
end; procedure TForm1.PageControl1DrawTab(Control: TCustomTabControl; TabIndex: Integer; const Rect: TRect; Active: Boolean);
begin
If Active Then
Control.Canvas.Font.Style := [fsBold]
Else
Control.Canvas.Font.Style := [];
Control.Canvas.Font.Color := clWhite;
SetBKMode( control.canvas.handle, TRANSPARENT );
Control.Canvas.TextOut( rect.left 2, rect.top 2,
(Control As
TPageControl).Pages[TabIndex].Caption );
end; end.
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歡迎光臨 KTop 研究院--<-<-<@ 發表人 - hagar 於 2003/08/17 08:39:48
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Clarinet
高階會員 發表：9 回覆：97 積分：126 註冊：2002-05-08 發送簡訊給我 |
引言: 參考: http://www.experts-exchange.com/Programming/Programming_Languages/Delphi/Q_10262786.html --- 歡迎光臨 KTop 研究院--<-<-<@ 發表人 - hagar 於 2003/08/17 08:39:48再次感謝hagar大大的回應！ 測試了一下，好像可以達到小弟的要求！只要再稍為修改一下其相對位置！ 在TabSheet方面可省下我之前的解決方法，就是每個TabSheet都要放一個TImage來解決，此範例可不用！ 但在PageControl方面一樣有同樣的問題，就是有其他的MessageDlg或Form在其上方時，會造成畫面被覆蓋的情形，無法自動重繪其原來的，而造成類似殘影的畫面！ 感謝hagar大大提供的另一種解決方法！十分感謝！
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GPS（全球衛星定位系統） http://www.allgps.com |
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GrandRURU
站務副站長 發表：240 回覆：1680 積分：1874 註冊：2005-06-21 發送簡訊給我 |
容我做一下筆記先，轉成c++的語法大概會像是……
[code cpp] //unit1.cpp //--------------------------------------------------------------------------- #include #pragma hdrstop #include "Unit1.h" //--------------------------------------------------------------------------- #pragma package(smart_init) #pragma resource "*.dfm" TForm1 *Form1; //--------------------------------------------------------------------------- __fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) { } //--------------------------------------------------------------------------- void __fastcall TForm1::Button1Click(TObject *Sender) { Close(); } //--------------------------------------------------------------------------- Graphics::TBitmap *bmp; LONG OldTabWndProc; int x,y; TRect r; int Result; LRESULT CALLBACK TabWndProc(HWND wnd, Cardinal msg, WPARAM wparam, LPARAM lparam) { if(msg == WM_ERASEBKGND){ Result = 1; GetClientRect(wnd, &r); TCanvas *canvas = new TCanvas(); try{ canvas->Handle = (HDC) wparam; y=0; while (y while(x x =bmp->Width; } y =bmp->Height; } } __finally{ canvas->Handle = 0; canvas->Free(); } } else{ OldTabWndProc = GetWindowLong(wnd, GWL_USERDATA); Result = CallWindowProc(FARPROC(OldTabWndProc), wnd, msg, wparam, lparam); } return Result; } //--------------------------------------------------------------------------- void __fastcall TForm1::FormCreate(TObject *Sender) { bmp =new Graphics::TBitmap; // could load bitmap from a resource here bmp->LoadFromFile("C:\\untitled.bmp"); // subclass the tabsheets, store old window proc in GWL_USERDATA // field of window structure for(int i=0; i { SetWindowLong(PageControl1->Pages[i]->Handle, GWL_USERDATA, SetWindowLong(PageControl1->Pages[i]->Handle, GWL_WNDPROC,(int)TabWndProc)); } } //--------------------------------------------------------------------------- void __fastcall TForm1::FormDestroy(TObject *Sender) { bmp->Free(); } //--------------------------------------------------------------------------- [/code] [code cpp] //unit.h //--------------------------------------------------------------------------- #ifndef Unit1H #define Unit1H //--------------------------------------------------------------------------- #include #include #include #include #include #include <Forms.hpp><br />#include #include #include #include #include #include #include #include #include #include //--------------------------------------------------------------------------- class TForm1 : public TForm { __published: // IDE-managed Components TPageControl *PageControl1; TTabSheet *TabSheet1; TTabSheet *TabSheet2; TTabSheet *TabSheet3; TTabSheet *TabSheet4; TButton *Button1; TButton *Button3; TEdit *Edit1; TLabel *Label1; void __fastcall Button1Click(TObject *Sender); void __fastcall FormCreate(TObject *Sender); void __fastcall FormDestroy(TObject *Sender); private: // User declarations public: // User declarations __fastcall TForm1(TComponent* Owner); }; //--------------------------------------------------------------------------- extern PACKAGE TForm1 *Form1; //--------------------------------------------------------------------------- #endif [/code] |
發表時間：2003-08-06 22:53:09
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系統時間：2024-04-25 2:13:18
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