HiDPI support: keep window's cursor after rescaling.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12275 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

FL/Fl_Window_Driver.H

@@ -152,6 +152,8 @@ public:
   // --- window cursor stuff
   virtual int set_cursor(Fl_Cursor);
   virtual int set_cursor(const Fl_RGB_Image*, int, int);
+  virtual void reuse_cursor(fl_uintptr_t);
+  virtual fl_uintptr_t current_cursor();
 
   // --- window shape stuff
   void shape_pixmap_(Fl_Image* pixmap); // platform-independent, support function

src/Fl_Screen_Driver.cxx

@@ -365,6 +365,7 @@ void Fl_Screen_Driver::rescale_all_windows_from_screen(int screen, float f)
   for (i = count - 1; i >= 0; i--) { // rescale all top-level windows, finishing with front one
     win = win_array[i];
     int oldx = win->x(), oldy = win->y();
+    fl_uintptr_t current = win->driver()->current_cursor();
     win->hide();
     win->driver()->screen_num(screen);
     win->position(oldx*old_f/f, oldy*old_f/f);
@@ -373,6 +374,7 @@ void Fl_Screen_Driver::rescale_all_windows_from_screen(int screen, float f)
       win->size(win->w() * old_f/f, win->h() * old_f/f);
     }
     win->show();
+    win->driver()->reuse_cursor(current);
     win->wait_for_expose();
   }
   delete[] win_array;

src/Fl_Window_Driver.cxx

@@ -239,6 +239,14 @@ int Fl_Window_Driver::set_cursor(const Fl_RGB_Image*, int, int) {
   return 0;
 }
 
+void Fl_Window_Driver::reuse_cursor(fl_uintptr_t) {
+}
+
+fl_uintptr_t Fl_Window_Driver::current_cursor() {
+  return 0;
+}
+
+
 void Fl_Window_Driver::wait_for_expose() {
   if (!shown()) return;
   Fl_X *i = Fl_X::i(pWindow);

src/Fl_win32.cxx

@@ -2294,6 +2294,7 @@ int Fl_WinAPI_Window_Driver::set_cursor(Fl_Cursor c) {
   custom_cursor = 0;
 
   SetCursor(cursor);
+  current_cursor_ = c;
 
   return 1;
 }
@@ -2316,6 +2317,16 @@ int Fl_WinAPI_Window_Driver::set_cursor(const Fl_RGB_Image *image, int hotx, int
   return 1;
 }
 
+void Fl_WinAPI_Window_Driver::reuse_cursor(fl_uintptr_t c) {
+  // calling SetCursor(cursor) does not work, so we call the crossplatform API
+  pWindow->cursor((Fl_Cursor)c);
+}
+
+fl_uintptr_t Fl_WinAPI_Window_Driver::current_cursor() {
+  return (fl_uintptr_t)current_cursor_;
+}
+
+
 ////////////////////////////////////////////////////////////////
 // Implement the virtual functions for the base Fl_Window class:
 

src/Fl_x.cxx

@@ -2420,9 +2420,6 @@ void Fl_X::make_xid(Fl_Window* win, XVisualInfo *visual, Colormap colormap)
     fl_background_pixel = -1;
     mask |= CWBackPixel;
   }
-  // reproduce the window cursor if a window is hidden and then recreated (e.g., rescaled)
-  attr.cursor = Fl_X11_Window_Driver::driver(win)->current_cursor_;
-  mask |= CWCursor;
   float s = 1;
 #if USE_XFT
   //compute adequate screen where to put the window
@@ -2885,6 +2882,7 @@ int Fl_X11_Window_Driver::set_cursor(const Fl_RGB_Image *image, int hotx, int ho
 
   xc = XcursorImageLoadCursor(fl_display, cursor);
   XDefineCursor(fl_display, fl_xid(pWindow), xc);
+  current_cursor_ = xc;
   XFreeCursor(fl_display, xc);
 
   XcursorImageDestroy(cursor);
@@ -2893,6 +2891,13 @@ int Fl_X11_Window_Driver::set_cursor(const Fl_RGB_Image *image, int hotx, int ho
 #endif
 }
 
+void Fl_X11_Window_Driver::reuse_cursor(fl_uintptr_t c)
+{
+  if (c) {
+    XDefineCursor(fl_display, fl_xid(pWindow), (Cursor)c);
+  }
+}
+
 ////////////////////////////////////////////////////////////////
 
 // returns pointer to the filename, or null if name ends with '/'

src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H

@@ -61,6 +61,7 @@ class FL_EXPORT Fl_WinAPI_Window_Driver : public Fl_Window_Driver
     HICON big_icon;
     HICON small_icon;
   };
+  Fl_Cursor current_cursor_;
 private:
   void shape_bitmap_(Fl_Image* b);
   void shape_alpha_(Fl_Image* img, int offset);
@@ -100,6 +101,8 @@ public:
   // --- window cursor stuff
   virtual int set_cursor(Fl_Cursor);
   virtual int set_cursor(const Fl_RGB_Image*, int, int);
+  virtual void reuse_cursor(fl_uintptr_t);
+  virtual fl_uintptr_t current_cursor();
 
   virtual void shape(const Fl_Image* img);
   virtual void icons(const Fl_RGB_Image *icons[], int count);

src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx

@@ -47,6 +47,8 @@ Fl_WinAPI_Window_Driver::Fl_WinAPI_Window_Driver(Fl_Window *win)
 {
   icon_ = new icon_data;
   memset(icon_, 0, sizeof(icon_data));
+  cursor = NULL;
+  current_cursor_ = FL_CURSOR_DEFAULT;
 }
 
 

src/drivers/X11/Fl_X11_Window_Driver.H

@@ -130,6 +130,8 @@ public:
   // --- window cursor stuff
   virtual int set_cursor(Fl_Cursor);
   virtual int set_cursor(const Fl_RGB_Image*, int, int);
+  virtual void reuse_cursor(fl_uintptr_t);
+  virtual fl_uintptr_t current_cursor() {return current_cursor_;}
 
   virtual void shape(const Fl_Image* img);
   virtual void icons(const Fl_RGB_Image *icons[], int count);