http://www.drbob42.com/activex/debugx.htm有一篇文章,教你怎样调试ACTIVEXFORM。
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To Azz1():ActiveForm的onDestroy事件在控件内部是不会触发的,在ActiveForm有这样一段代码:
TActiveFormX = class(TActiveForm, IActiveFormX)
private
{ Private declarations }
FEvents: IActiveFormXEvents;
procedure ActivateEvent(Sender: TObject);
procedure ClickEvent(Sender: TObject);
procedure CreateEvent(Sender: TObject);
procedure DblClickEvent(Sender: TObject);
procedure DeactivateEvent(Sender: TObject);
procedure DestroyEvent(Sender: TObject);
procedure KeyPressEvent(Sender: TObject; var Key: Char);
procedure PaintEvent(Sender: TObject);
protected
……procedure TActiveFormX.Initialize;
begin
inherited Initialize;
OnActivate := ActivateEvent;
OnClick := ClickEvent;
OnCreate := CreateEvent;
OnDblClick := DblClickEvent;
OnDeactivate := DeactivateEvent;
OnDestroy := DestroyEvent;
OnKeyPress := KeyPressEvent;
OnPaint := PaintEvent;
end;
注意: ActiveForm的事件OnDestroy 已被赋值,当Destroy发生时,会执行DestroyEvent中
的代码,即会触发脚本中的OnDestroy事件,具体一点就是,如果你在脚本中写了调用的ActiveForm的OnDestroy事件,则它会执行。如果你想在OnDestroy中做自己的处理工作,可如下处理:
procedure TActiveFormX.DestroyEvent(Sender: TObject);
begin
//这里加入自定义处理过程
if FEvents <> nil then FEvents.OnDestroy;
//或这里加入自定义处理过程
end;
或重载ActiveForm的析构方法。
BeforeDestruction是可以的
如果你重载了ActiveForm的析构方法,那么,当重新装载页面或刷新页面(相当页重新装载)时,IE会释放ActiveForm,ActiveForm必然会调用析构方法,如果析构方法不调用,岂不是造成内存泄露:)。不知你的调用是如何进行的,有兴趣的话可以交流一下。
为了让ActiveForm在重新装载页面或刷新页面时调用我的代码,我试了好多,
包括 FormClose, Destructor, DeInitialize, 都不成,只有BeforeDestructionDelphi5
如下程序,Destrutor中的方法可以执行:
unit ActiveFormImpl1;interfaceuses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ActiveX, AxCtrls, ActiveFormProj1_TLB, StdVcl;type
TActiveFormX = class(TActiveForm, IActiveFormX)
private
{ Private declarations }
FEvents: IActiveFormXEvents;
procedure ActivateEvent(Sender: TObject);
procedure ClickEvent(Sender: TObject);
procedure CreateEvent(Sender: TObject);
procedure DblClickEvent(Sender: TObject);
procedure DeactivateEvent(Sender: TObject);
procedure DestroyEvent(Sender: TObject);
procedure KeyPressEvent(Sender: TObject; var Key: Char);
procedure PaintEvent(Sender: TObject);
protected
{ Protected declarations }
procedure DefinePropertyPages(DefinePropertyPage: TDefinePropertyPage); override;
procedure EventSinkChanged(const EventSink: IUnknown); override;
function Get_Active: WordBool; safecall;
function Get_AutoScroll: WordBool; safecall;
function Get_AutoSize: WordBool; safecall;
function Get_AxBorderStyle: TxActiveFormBorderStyle; safecall;
function Get_Caption: WideString; safecall;
function Get_Color: OLE_COLOR; safecall;
function Get_Cursor: Smallint; safecall;
function Get_DoubleBuffered: WordBool; safecall;
function Get_DropTarget: WordBool; safecall;
function Get_Enabled: WordBool; safecall;
function Get_Font: IFontDisp; safecall;
function Get_HelpFile: WideString; safecall;
function Get_KeyPreview: WordBool; safecall;
function Get_PixelsPerInch: Integer; safecall;
function Get_PrintScale: TxPrintScale; safecall;
function Get_Scaled: WordBool; safecall;
function Get_Visible: WordBool; safecall;
function Get_VisibleDockClientCount: Integer; safecall;
procedure _Set_Font(const Value: IFontDisp); safecall;
procedure Set_AutoScroll(Value: WordBool); safecall;
procedure Set_AutoSize(Value: WordBool); safecall;
procedure Set_AxBorderStyle(Value: TxActiveFormBorderStyle); safecall;
procedure Set_Caption(const Value: WideString); safecall;
procedure Set_Color(Value: OLE_COLOR); safecall;
procedure Set_Cursor(Value: Smallint); safecall;
procedure Set_DoubleBuffered(Value: WordBool); safecall;
procedure Set_DropTarget(Value: WordBool); safecall;
procedure Set_Enabled(Value: WordBool); safecall;
procedure Set_Font(var Value: IFontDisp); safecall;
procedure Set_HelpFile(const Value: WideString); safecall;
procedure Set_KeyPreview(Value: WordBool); safecall;
procedure Set_PixelsPerInch(Value: Integer); safecall;
procedure Set_PrintScale(Value: TxPrintScale); safecall;
procedure Set_Scaled(Value: WordBool); safecall;
procedure Set_Visible(Value: WordBool); safecall;
public
{ Public declarations }
procedure Initialize; override;
destructor Destroy();override;
end;implementationuses ComObj, ComServ;{$R *.DFM}{ TActiveFormX }procedure TActiveFormX.DefinePropertyPages(DefinePropertyPage: TDefinePropertyPage);
begin
{ Define property pages here. Property pages are defined by calling
DefinePropertyPage with the class id of the page. For example,
DefinePropertyPage(Class_ActiveFormXPage); }
end;procedure TActiveFormX.EventSinkChanged(const EventSink: IUnknown);
begin
FEvents := EventSink as IActiveFormXEvents;
end;procedure TActiveFormX.Initialize;
begin
inherited Initialize;
OnActivate := ActivateEvent;
OnClick := ClickEvent;
OnCreate := CreateEvent;
OnDblClick := DblClickEvent;
OnDeactivate := DeactivateEvent;
OnDestroy := DestroyEvent;
OnKeyPress := KeyPressEvent;
OnPaint := PaintEvent;
end;function TActiveFormX.Get_Active: WordBool;
begin
Result := Active;
end;function TActiveFormX.Get_AutoScroll: WordBool;
begin
Result := AutoScroll;
end;function TActiveFormX.Get_AutoSize: WordBool;
begin
Result := AutoSize;
end;function TActiveFormX.Get_AxBorderStyle: TxActiveFormBorderStyle;
begin
Result := Ord(AxBorderStyle);
end;function TActiveFormX.Get_Caption: WideString;
begin
Result := WideString(Caption);
end;function TActiveFormX.Get_Color: OLE_COLOR;
begin
Result := OLE_COLOR(Color);
end;function TActiveFormX.Get_Cursor: Smallint;
begin
Result := Smallint(Cursor);
end;function TActiveFormX.Get_DoubleBuffered: WordBool;
begin
Result := DoubleBuffered;
end;function TActiveFormX.Get_DropTarget: WordBool;
begin
Result := DropTarget;
end;function TActiveFormX.Get_Enabled: WordBool;
begin
Result := Enabled;
end;function TActiveFormX.Get_Font: IFontDisp;
begin
GetOleFont(Font, Result);
end;function TActiveFormX.Get_HelpFile: WideString;
begin
Result := WideString(HelpFile);
end;function TActiveFormX.Get_KeyPreview: WordBool;
begin
Result := KeyPreview;
end;function TActiveFormX.Get_PixelsPerInch: Integer;
begin
Result := PixelsPerInch;
end;function TActiveFormX.Get_PrintScale: TxPrintScale;
begin
Result := Ord(PrintScale);
end;function TActiveFormX.Get_Scaled: WordBool;
begin
Result := Scaled;
end;function TActiveFormX.Get_Visible: WordBool;
begin
Result := Visible;
end;function TActiveFormX.Get_VisibleDockClientCount: Integer;
begin
Result := VisibleDockClientCount;
end;procedure TActiveFormX._Set_Font(const Value: IFontDisp);
begin
SetOleFont(Font, Value);
end;procedure TActiveFormX.ActivateEvent(Sender: TObject);
begin
if FEvents <> nil then FEvents.OnActivate;
end;procedure TActiveFormX.ClickEvent(Sender: TObject);
begin
if FEvents <> nil then FEvents.OnClick;
end;procedure TActiveFormX.CreateEvent(Sender: TObject);
begin
if FEvents <> nil then FEvents.OnCreate;
end;procedure TActiveFormX.DblClickEvent(Sender: TObject);
begin
if FEvents <> nil then FEvents.OnDblClick;
end;procedure TActiveFormX.DeactivateEvent(Sender: TObject);
begin
if FEvents <> nil then FEvents.OnDeactivate;
end;procedure TActiveFormX.DestroyEvent(Sender: TObject);
begin
if FEvents <> nil then FEvents.OnDestroy;
end;procedure TActiveFormX.KeyPressEvent(Sender: TObject; var Key: Char);
var
TempKey: Smallint;
begin
TempKey := Smallint(Key);
if FEvents <> nil then FEvents.OnKeyPress(TempKey);
Key := Char(TempKey);
end;procedure TActiveFormX.PaintEvent(Sender: TObject);
begin
if FEvents <> nil then FEvents.OnPaint;
end;procedure TActiveFormX.Set_AutoScroll(Value: WordBool);
begin
AutoScroll := Value;
end;procedure TActiveFormX.Set_AutoSize(Value: WordBool);
begin
AutoSize := Value;
end;procedure TActiveFormX.Set_AxBorderStyle(Value: TxActiveFormBorderStyle);
begin
AxBorderStyle := TActiveFormBorderStyle(Value);
end;procedure TActiveFormX.Set_Caption(const Value: WideString);
begin
Caption := TCaption(Value);
end;procedure TActiveFormX.Set_Color(Value: OLE_COLOR);
begin
Color := TColor(Value);
end;procedure TActiveFormX.Set_Cursor(Value: Smallint);
begin
Cursor := TCursor(Value);
end;procedure TActiveFormX.Set_DoubleBuffered(Value: WordBool);
begin
DoubleBuffered := Value;
end;procedure TActiveFormX.Set_DropTarget(Value: WordBool);
begin
DropTarget := Value;
end;procedure TActiveFormX.Set_Enabled(Value: WordBool);
begin
Enabled := Value;
end;procedure TActiveFormX.Set_Font(var Value: IFontDisp);
begin
SetOleFont(Font, Value);
end;procedure TActiveFormX.Set_HelpFile(const Value: WideString);
begin
HelpFile := String(Value);
end;procedure TActiveFormX.Set_KeyPreview(Value: WordBool);
begin
KeyPreview := Value;
end;procedure TActiveFormX.Set_PixelsPerInch(Value: Integer);
begin
PixelsPerInch := Value;
end;procedure TActiveFormX.Set_PrintScale(Value: TxPrintScale);
begin
PrintScale := TPrintScale(Value);
end;procedure TActiveFormX.Set_Scaled(Value: WordBool);
begin
Scaled := Value;
end;procedure TActiveFormX.Set_Visible(Value: WordBool);
begin
Visible := Value;
end;destructor TActiveFormX.Destroy;
begin
inherited;
showmessage('I am Destroy');
end;initialization
TActiveFormFactory.Create(
ComServer,
TActiveFormControl,
TActiveFormX,
Class_ActiveFormX,
1,
'',
OLEMISC_SIMPLEFRAME or OLEMISC_ACTSLIKELABEL,
tmApartment);
end.