lcl: remove workarounds to recursive LM_CHANGE calls, since it was fixed fixed in rev 27050 #8d7d250608 and 27051:

- don't toggle TRadioButton siblings state since this is done by widgetset;  
 - remove FLastCheckedOnChange; 
 - call OnChange only if State was really changed by widgetset 
 - Dont set Checked property in Click
Part of 0017139 and 0017104

git-svn-id: trunk@27053 -

lcl/include/buttoncontrol.inc

@@ -47,19 +47,12 @@ end;
 
 procedure TButtonControl.DoOnChange;
 begin
-  if Checked = FLastCheckedOnChange then Exit;
-  FLastCheckedOnChange := Checked;
+
   if [csLoading, csDestroying, csDesigning] * ComponentState <> [] then Exit;
   EditingDone;
   if Assigned(OnChange) then OnChange(Self);
 end;
 
-procedure TButtonControl.Loaded;
-begin
-  inherited Loaded;
-  fLastCheckedOnChange:=Checked;
-end;
-
 procedure TButtonControl.CMWantSpecialKey(var Message: TLMessage);
 begin
   // button controls dont want any special keys

lcl/include/customcheckbox.inc

@@ -53,13 +53,8 @@ begin
 end;
 
 procedure TCustomCheckBox.DoChange(var Msg);
-var
-  NewState: TCheckBoxState;
 begin
-  NewState := RetrieveState;
-  if FState = NewState then exit;
-  FState := NewState;
-  // emulate delphi OnClick behaviour
+  FState := RetrieveState;
   DoClickOnChange;
 end;
 
@@ -154,8 +149,10 @@ begin
     if Assigned(Action) and (Action is TCustomAction) then
       TCustomAction(Action).Checked := FState = cbChecked;
     ApplyChanges;
-    DoOnChange;
-    if not ClicksDisabled then
+    //some widgetsets (gtk*) does not allow to uncheck a radio button
+    //only call OnChange if effectivelly changed
+    FState := RetrieveState;
+    if FState <> OldState then
       DoClickOnChange;
   end;
 end;
@@ -249,7 +246,11 @@ end;
 
 procedure TCustomCheckBox.DoClickOnChange;
 begin
-  inherited Click;
+  // emulate delphi OnClick behaviour (click will call OnChange)
+  if not ClicksDisabled then
+    inherited Click
+  else
+    DoOnChange;
 end;
 
 function TCustomCheckBox.DialogChar(var Message: TLMKey): boolean;

lcl/include/radiobutton.inc

@@ -71,44 +71,14 @@ begin
   AdjustSize;
 end;
 
-procedure TRadioButton.ApplyChanges;
-begin
-  inherited ApplyChanges;
-  DoApplyChanges;
-end;
-
-procedure TRadioButton.SetChecked(Value: Boolean);
-begin
-  inherited SetChecked(Value);
-  TabStop := Value;
-end;
-
-procedure TRadioButton.DoChange(var Msg);
-begin
-  inherited DoChange(Msg);
-  DoApplyChanges;
-end;
-
-procedure TRadioButton.DoApplyChanges;
-var
-  i: Integer;
-  Sibling: TControl;
-begin
-  if not (csLoading in ComponentState) and (Parent <> nil) and (FState = cbChecked) then
-  begin
-    for i := 0 to Parent.ControlCount - 1 do
-    begin
-      Sibling := Parent.Controls[i];
-      if (Sibling is TRadioButton) and (Sibling <> Self) then
-        TRadioButton(Sibling).Checked := False;
-    end;
-  end;
-end;
-
 procedure TRadioButton.DoClickOnChange;
 begin
-  if State = cbChecked then
-    inherited DoClickOnChange;
+  TabStop := FState = cbChecked;
+  //inherited calls DoOnChange
+  if FState = cbChecked then
+    inherited DoClickOnChange
+  else
+    DoOnChange;
 end;
 
 procedure TRadioButton.CreateParams(var Params: TCreateParams);
@@ -125,12 +95,6 @@ begin
   RegisterRadioButton;
 end;
 
-procedure TRadioButton.Click;
-begin
-  Checked := True;
-  inherited Click;
-end;
-
 function TRadioButton.DialogChar(var Message: TLMKey): boolean;
 begin
   if IsAccel(Message.CharCode, Caption) and CanFocus then

lcl/stdctrls.pp

@@ -1041,13 +1041,11 @@ type
     function IsCheckedStored: boolean;
     procedure WMDefaultClicked(var Message: TLMessage); message LM_CLICKED;
   protected
-    FLastCheckedOnChange: boolean;
     class procedure WSRegisterClass; override;
     function GetChecked: Boolean; virtual;
     procedure SetChecked(Value: Boolean); virtual;
     procedure DoOnChange; virtual;
     procedure Click; override;
-    procedure Loaded; override;
     procedure CMWantSpecialKey(var Message: TLMessage); message CM_WANTSPECIALKEY;
   protected
     property Checked: Boolean read GetChecked write SetChecked stored IsCheckedStored default False;
@@ -1317,13 +1315,8 @@ type
   TRadioButton = class(TCustomCheckBox)
   protected
     class procedure WSRegisterClass; override;
-    procedure Click; override;
     function DialogChar(var Message: TLMKey): boolean; override;
     procedure RealSetText(const Value: TCaption); override;
-    procedure ApplyChanges; override;
-    procedure SetChecked(Value: Boolean); override;
-    procedure DoChange(var Msg); message LM_CHANGED;
-    procedure DoApplyChanges;
     procedure DoClickOnChange; override;
     procedure CreateParams(var Params: TCreateParams); override;
   public