Delete all callbacks from a widget, when it will be destroyed

ChangeLog

@@ -1,3 +1,6 @@
+2016-07-30  Markus Gans  <guru.mail@muenster.de>
+	* Delete all callbacks from a widget, when it will be destroyed
+
 2016-07-28  Markus Gans  <guru.mail@muenster.de>
 	* Improvements for the window focus
 

src/fwidget.cpp

@@ -103,8 +103,8 @@ FWidget::FWidget (FWidget* parent)
 //----------------------------------------------------------------------
 FWidget::~FWidget()  // destructor
 {
+  delCallbacks();
   processDestroy();
-
   FApplication::removeQueuedEvent(this);
 
   if ( this == getClickedWidget() )
@@ -1121,6 +1121,14 @@ void FWidget::delCallback (FWidget* cb_instance)
   }
 }
 
+//----------------------------------------------------------------------
+inline void FWidget::delCallbacks()
+{
+  // delete all callbacks from this widget
+  memberCallbackObjects.clear();  // member function pointer
+  callbackObjects.clear();        // function pointer
+}
+
 //----------------------------------------------------------------------
 void FWidget::emitCallback (FString emit_signal)
 {

src/fwidget.h

@@ -352,6 +352,7 @@ class FWidget : public FObject, public FTerm
                                 , void* = null );
    void             delCallback (FCallback);
    void             delCallback (FWidget*);
+   void             delCallbacks();
    void             emitCallback (FString);
 
    void             addAccelerator (int);