Refactoring TTaskDialog:

- Change signature of TWSTaskDialog.Execute and related functions/methods so we can set ParentWnd and retrieve RadioRes.
The TLCLTaskDialog now should act the same as the old emulated version (unit LCLTaskDialog).

lcl/include/taskdialog.inc

@@ -221,7 +221,7 @@ var
   TaskDlg: LCLTaskDialog.TTaskDialog;
   DefRB, DefBtn: TModalResult;
   B: TTaskDialogBaseButtonItem;
-  ButtonID: Integer;
+  ButtonID, ARadioRes: Integer;
 const
   TD_BTNMOD: array[TTaskDialogCommonButton] of Integer = (
     mrOk, mrYes, mrNo, mrCancel, mrRetry, mrAbort);
@@ -233,15 +233,14 @@ begin
 
   //temporary show new, then old dialog, both in emulated mode (regardless of Flags)
   LCLTaskDialog.TaskDialogIndirect := nil;
-  ButtonID := TWSTaskDialogClass(WidgetSetClass).Execute(Self);
+  ButtonID := TWSTaskDialogClass(WidgetSetClass).Execute(Self, ParentWnd, ARadioRes);
   FModalResult := ButtonIDToModalResult(ButtonID);
   Result := (ButtonID >= 0);
   debugln(['TWSTaskDialogClass(WidgetSetClass).Execute(Self)=',ButtonID,', Result=',Result]);
   debugln(['New: ButtonID=',ButtonID]);
   debugln(['New: FModalResult=',FModalResult]);
   debugln(['New: VerifyChecked=',tfVerificationFlagChecked in FFlags]);
-  //ToDo: we need to retrieve RadioResult, since we cannot set RadioButton (it's read only)
-
+  debugln(['New: ARadioRes=',ARadioRes]);
   FillChar(TaskDlg, SizeOf(LCLTaskDialog.TTaskDialog), 0);
 
   if RadioButtons.DefaultButton<> nil then
@@ -276,7 +275,7 @@ begin
   debugln(['Old: FModalResult=',FModalResult]);
 
   //ToDo move FirstButtonIndex and FirstRadioButtonIndex to interface section Dialogs unit.
-
+  debugln(['Old: TaskDlg.RadioRes=',TaskDlg.RadioRes]);
   if (TaskDlg.RadioRes>=200) and (TaskDlg.RadioRes-200<RadioButtons.Count) then
     FRadioButton := RadioButtons[TaskDlg.RadioRes-200] as TTaskDialogRadioButtonItem
   else

lcl/interfaces/win32/win32wsdialogs.pp

@@ -161,7 +161,7 @@ type
 
   TWin32WSTaskDialog = class(TWSTaskDialog)
   public
-    class function Execute(const ADlg: TCustomTaskDialog): Integer; override;
+    class function Execute(const ADlg: TCustomTaskDialog; AParentWnd: HWND; out ARadioRes: Integer): Integer; override;
   end;
 
 function OpenFileDialogCallBack(Wnd: HWND; uMsg: UINT; {%H-}wParam: WPARAM;
@@ -1578,10 +1578,10 @@ var
   TaskDialogIndirect: function(AConfig: pointer; Res: PInteger;
     ResRadio: PInteger; VerifyFlag: PBOOL): HRESULT; stdcall;
 
-class function TWin32WSTaskDialog.Execute(const ADlg: TCustomTaskDialog): Integer;
+class function TWin32WSTaskDialog.Execute(const ADlg: TCustomTaskDialog; AParentWnd: HWND; out ARadioRes: Integer): Integer;
 begin
   //writeln('TWin32WSTaskDialog.Execute');
-  Result := inherited Execute(ADlg);
+  Result := inherited Execute(ADlg, AParentWnd, ARadioRes);
 end;
 
 procedure InitTaskDialogIndirect;

lcl/taskdlgemulation.pp

@@ -24,7 +24,6 @@ type
   private
     /// the Task Dialog structure which created the form
     FDlg: TTaskDialog;
-    FRadioRes: Integer;
     FVerifyChecked: Boolean;
     RadioButtonArray: array of TRadioButton;
 
@@ -58,9 +57,8 @@ type
 
     constructor CreateNew(AOwner: TComponent; Num: Integer = 0); override;
 
-    function Execute: Integer;
+    function Execute(AParentWnd: HWND; out ARadioRes: Integer): Integer;
   public
-    property RadioRes: Integer read FRadioRes;
   end;
 
 
@@ -70,7 +68,7 @@ var
   TaskDialog_Translate: TTaskDialogTranslate;
 
 
-function ExecuteLCLTaskDialog(const ADlg: TTaskDialog): Integer;
+function ExecuteLCLTaskDialog(const ADlg: TTaskDialog; AParentWnd: HWND; out ARadioRes: Integer): Integer;
 
 implementation
 
@@ -228,7 +226,7 @@ end;
 
 
 { -------------- }
-function ExecuteLCLTaskDialog(const ADlg: TTaskDialog): Integer;
+function ExecuteLCLTaskDialog(const ADlg: TTaskDialog; AParentWnd: HWND; out ARadioRes: Integer): Integer;
 var
   DlgForm: TLCLTaskDialog;
 begin
@@ -236,7 +234,7 @@ begin
   Result := -1;
   DlgForm := TLCLTaskDialog.CreateNew(ADlg);
   try
-    Result := DlgForm.Execute;
+    Result := DlgForm.Execute(AParentWnd, ARadioRes);
   finally
     FreeAndNil(DlgForm);
   end;
@@ -252,21 +250,19 @@ begin
   KeyPreview := True;
 end;
 
-function TLCLTaskDialog.Execute: Integer;
+function TLCLTaskDialog.Execute(AParentWnd: HWND; out ARadioRes: Integer): Integer;
 var
   mRes, I: Integer;
-  aParent: HWND;
 begin
   debugln(['TLCLTaskDialog.Execute: Assigned(FDlg)=',Assigned(FDlg)]);
   if not Assigned(FDlg) then
     Exit(-1);
   SetupControls;
 
-  aParent := FDlg.ParentWindow;
   //set form parent
-  if (aParent <> 0) then
+  if (AParentWnd <> 0) then
     for I := 0 to Screen.CustomFormCount-1 do
-      if Screen.CustomForms[I].Handle = aParent then
+      if Screen.CustomForms[I].Handle = AParentWnd then
       begin
         PopupParent := Screen.CustomForms[I];
         Break;
@@ -301,10 +297,10 @@ begin
       FDlg.Flags := FDlg.Flags - [tfVerificationFlagChecked]
   end;
 
-  FRadioRes := 0;
+  ARadioRes := 0;
   for i := 0 to high(RadioButtonArray) do
     if RadioButtonArray[i].Checked then
-      FRadioRes := i+FirstRadioButtonIndex;
+      ARadioRes := i+FirstRadioButtonIndex;
 
 
 end;

lcl/widgetset/wsdialogs.pp

@@ -106,7 +106,7 @@ type
   TWSTaskDialogClass = class of TWSTaskDialog;
   TWSTaskDialog  = class(TWSLCLComponent)
   published
-    class function Execute(const ADlg: TCustomTaskDialog): Integer; virtual;
+    class function Execute(const ADlg: TCustomTaskDialog; AParentWnd: HWND; out ARadioRes: Integer): Integer; virtual;
   end;
 
   { WidgetSetRegistration }
@@ -198,10 +198,10 @@ end;
 
 { TWSTaskDialog }
 
-class function TWSTaskDialog.Execute(const ADlg: TCustomTaskDialog): Integer;
+class function TWSTaskDialog.Execute(const ADlg: TCustomTaskDialog; AParentWnd: HWND; out ARadioRes: Integer): Integer;
 begin
   //writeln('TWSTaskDialog.Execute: Assigned(ADlg)=',Assigned(ADlg));
-  Result := ExecuteLCLTaskDialog(TTaskDialog(ADlg));
+  Result := ExecuteLCLTaskDialog(TTaskDialog(ADlg), AParentWnd, ARadiores);
 end;
 
 { WidgetSetRegistration }