HiDPI support: keep window's icons after rescaling

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12276 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

FL/Fl_Window_Driver.H

@@ -162,6 +162,7 @@ public:
 
   // --- window icon stuff
   virtual void icons(const Fl_RGB_Image *icons[], int count) {}
+  virtual void reuse_icons() {}
   virtual const void *icon() const {return NULL;}
   virtual void icon(const void * ic) {}
   virtual void free_icons() {}

src/Fl_Screen_Driver.cxx

@@ -375,6 +375,7 @@ void Fl_Screen_Driver::rescale_all_windows_from_screen(int screen, float f)
     }
     win->show();
     win->driver()->reuse_cursor(current);
+    win->driver()->reuse_icons();
     win->wait_for_expose();
   }
   delete[] win_array;

src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H

@@ -109,6 +109,7 @@ public:
   virtual const void *icon() const;
   virtual void icon(const void * ic);
   virtual void free_icons();
+  virtual void reuse_icons();
   void set_icons(); // driver-internal support function
   // this one is implemented in Fl_win32.cxx
   virtual void capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right);

src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx

@@ -347,6 +347,11 @@ void Fl_WinAPI_Window_Driver::icons(const Fl_RGB_Image *icons[], int count) {
       icon_->icons[i] = (Fl_RGB_Image*)((Fl_RGB_Image*)icons[i])->copy();
   }
   
+  reuse_icons();
+}
+
+void Fl_WinAPI_Window_Driver::reuse_icons()
+{
   if (Fl_X::i(pWindow))
     set_icons();
 }
@@ -443,7 +448,7 @@ void Fl_WinAPI_Window_Driver::hide() {
   if (hide_common()) return;
   
   // make sure any custom icons get freed
-  icons(NULL, 0);
+//  icons(NULL, 0); // free_icons() is called by the Fl_Window destructor
   // this little trick keeps the current clipboard alive, even if we are about
   // to destroy the window that owns the selection.
   if (GetClipboardOwner()==ip->xid)

src/drivers/X11/Fl_X11_Window_Driver.H

@@ -135,6 +135,7 @@ public:
 
   virtual void shape(const Fl_Image* img);
   virtual void icons(const Fl_RGB_Image *icons[], int count);
+  virtual void reuse_icons();
   virtual const void *icon() const;
   virtual void icon(const void * ic);
   virtual void free_icons();

src/drivers/X11/Fl_X11_Window_Driver.cxx

@@ -356,6 +356,11 @@ void Fl_X11_Window_Driver::icons(const Fl_RGB_Image *icons[], int count) {
       icon_->icons[i] = (Fl_RGB_Image*)((Fl_RGB_Image*)icons[i])->copy();
   }
   
+  reuse_icons();
+}
+
+void Fl_X11_Window_Driver::reuse_icons()
+{
   if (Fl_X::i(pWindow))
     set_icons();
 }