webbrowser 与Dbgrid不兼容 |
尚未結案
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zhuangquanmin
一般會員 發表:5 回覆:6 積分:2 註冊:2005-04-13 發送簡訊給我 |
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wameng
版主 發表:31 回覆:1336 積分:1188 註冊:2004-09-16 發送簡訊給我 |
會出現這個原因,主要是 TWebBrowser 的Bug 。
他多重繼承了TWinControl 卻不處理 TControl 類的 Focus。
導致 DBGrid 在判斷自己是否為 Focused 狀態出了問題。 瞭解了原因後,要解決就容易許多。
1. 修改 DBGrid 越過檢查 AcquireFocus
2. 在DocumentComplete事件重新確認Focus的處理。
procedure TForm1.WebBrowser1DocumentComplete(Sender: TObject;
const pDisp: IDispatch; var URL: OleVariant);
begin
WebBrowser1.SetFocus;
end;
使用這個方法,或需有時仍會。主要是時機的不同。 參考 ~~~~~~~~~~~
難得聰明,常常糊塗。
~~~~~~~~~~~
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zhuangquanmin
一般會員 發表:5 回覆:6 積分:2 註冊:2005-04-13 發送簡訊給我 |
谢谢大哥,我已经参照以下代码,重写一个新的控件解决了这个问题,但不知还有没有更好的办法。这段代码对跟我遇到同样问题的人有帮助。
unit FixedDBGrid; interface uses
Winprocs,wintypes, Messages, SysUtils, Classes, Graphics,
Controls, Forms, Dialogs, Grids, DBGrids; type
TFixedDBGrid = class(TDBGrid)
private
{ Private declarations }
protected
{ Protected declarations }
public
{ Public declarations }
procedure WMRButtonDown(var Message: TWMRButtonDown); message
WM_RBUTTONDOWN;
procedure WMLButtonDown(var Message: TWMLButtonDown); message
WM_LBUTTONDOWN;
published
{ Published declarations }
end; procedure Register; implementation procedure TFixedDBGrid.WMRButtonDown(var Message: TWMRButtonDown);
begin
winprocs.SetFocus(handle); {remember that winprocs in Delphi 1 only!}
inherited;
end;
procedure TFixedDBGrid.WMLButtonDown(var Message: TWMLButtonDown);
begin
winprocs.SetFocus(handle); {remember that winprocs in Delphi 1 only!}
inherited;
end;
procedure Register;
begin
RegisterComponents('Samples', [TFixedDBGrid]);
end; end.
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pcernet
初階會員 發表:69 回覆:113 積分:41 註冊:2002-11-29 發送簡訊給我 |
這個問題板上已經有兩篇以上的文章了!
但好像都沒有人提出完整可行的源碼! unit FixedDBGrid; interface uses
Winprocs,wintypes, Messages, SysUtils, Classes, Graphics,
Controls, Forms, Dialogs, Grids, DBGrids; type
TFixedDBGrid = class(TDBGrid)
private
{ Private declarations }
protected
{ Protected declarations }
public
{ Public declarations }
procedure WMRButtonDown(var Message: TWMRButtonDown); message
WM_RBUTTONDOWN;
procedure WMLButtonDown(var Message: TWMLButtonDown); message
WM_LBUTTONDOWN;
published
{ Published declarations }
end; procedure Register; implementation procedure TFixedDBGrid.WMRButtonDown(var Message: TWMRButtonDown);
begin
winprocs.SetFocus(handle); {remember that winprocs in Delphi 1 only!}
inherited;
end;
procedure TFixedDBGrid.WMLButtonDown(var Message: TWMLButtonDown);
begin
winprocs.SetFocus(handle); {remember that winprocs in Delphi 1 only!}
inherited;
end;
procedure Register;
begin
RegisterComponents('Samples', [TFixedDBGrid]);
end; end. 僅供參考!
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pcernet
初階會員 發表:69 回覆:113 積分:41 註冊:2002-11-29 發送簡訊給我 |
unit FixedDBGrid; interface uses
Winprocs,wintypes, Messages, SysUtils, Classes, Graphics,
Controls, Forms, Dialogs, Grids, DBGrids; type
TFixedDBGrid = class(TDBGrid)
private
{ Private declarations }
protected
{ Protected declarations }
public
{ Public declarations }
procedure WMRButtonDown(var Message: TWMRButtonDown); message
WM_RBUTTONDOWN;
procedure WMLButtonDown(var Message: TWMLButtonDown); message
WM_LBUTTONDOWN;
published
{ Published declarations }
end; procedure Register; implementation procedure TFixedDBGrid.WMRButtonDown(var Message: TWMRButtonDown);
begin
winprocs.SetFocus(handle); {remember that winprocs in Delphi 1 only!}
inherited;
end;
procedure TFixedDBGrid.WMLButtonDown(var Message: TWMLButtonDown);
begin
winprocs.SetFocus(handle); {remember that winprocs in Delphi 1 only!}
inherited;
end;
procedure Register;
begin
RegisterComponents('Samples', [TFixedDBGrid]);
end; end. 將上面源碼存成.pas,安裝Component。
加入元件之後,程式是將控件註冊在Samples,在Samples找到FixedDBGrid直接當成DBGrid使用即可! 應該可以,再不行的話建議用ExpressQuantumGrid.Suite控件,保證可以,但是編譯之後,執行檔大了三倍。
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