- Implement Fl_Window::wait_for_expose() for Mac OS:

The -[NSWindow makeKeyAndOrderFront:] message used to make the window appear on the screen,
but, starting with 10.10 (approximately), this changed, and it became necessary to query for events
for a new window to appear on the screen. With 10.11 two event messages are needed.
The solution is therefore to implement Fl_Window::wait_for_expose().

- Calling NSDisableScreenUpdates()()/NSEnableScreenUpdates() before and after window updates
greatly accelerates multi-window update operations.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10826 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

FL/mac.H

@@ -208,6 +208,7 @@ public:
   static Fl_Fontdesc* calc_fl_fonts(void); // computes the fl_fonts global variable
   static int dnd(int use_selection); // call Fl_X::dnd(1) to support text dragging
   static int calc_mac_os_version(void); // computes the fl_mac_os_version global variable
+  static void do_wait_for_expose();
 private:
 #if FLTK_ABI_VERSION >= 10304
   CGRect* subRect_;           // makes sure subwindow remains inside its parent window

src/Fl_Window.cxx

@@ -462,9 +462,13 @@ void Fl_Window::free_icons() {
 
 void Fl_Window::wait_for_expose() {
   if (!shown()) return;
+#ifdef __APPLE__
+  Fl_X::do_wait_for_expose();
+#else
   while (!i || i->wait_for_expose) {
     Fl::wait();
   }
+#endif
 }
 
 //

src/Fl_cocoa.mm

@@ -779,7 +779,9 @@ int fl_wait( double time )
     // the idle function may turn off idle, we can then wait:
     if (Fl::idle) time_to_wait = 0.0;
   }
+  NSDisableScreenUpdates(); // 10.3 Makes updates to all windows appear as a single event
   Fl::flush();
+  NSEnableScreenUpdates(); // 10.3
   if (Fl::idle && !in_idle) // 'idle' may have been set within flush()
     time_to_wait = 0.0;
   double retval = fl_wait(time_to_wait);
@@ -3047,10 +3049,6 @@ static void set_subwindow_frame(Fl_Window *w) { // maps a subwindow at its corre
     x->changed_resolution(false);
 #endif
     [cw makeKeyAndOrderFront:nil];
-    if (fl_mac_os_version >= 101100) { // these two messages seem necessary to make the window appear on screen
-      [NSApp nextEventMatchingMask:NSAnyEventMask untilDate:nil inMode:NSDefaultRunLoopMode dequeue:NO];
-      [NSApp nextEventMatchingMask:NSAnyEventMask untilDate:nil inMode:NSDefaultRunLoopMode dequeue:NO];
-    }
   }
 
   if (!w->parent()) {
@@ -3087,6 +3085,13 @@ static void set_subwindow_frame(Fl_Window *w) { // maps a subwindow at its corre
   }
 }
 
+void Fl_X::do_wait_for_expose()
+{ // this will make freshly created windows appear on the screen
+  [NSApp nextEventMatchingMask:NSAnyEventMask untilDate:nil inMode:NSDefaultRunLoopMode dequeue:NO];
+  if (fl_mac_os_version >= 101100) { // this extra message seems necessary with 10.11
+    [NSApp nextEventMatchingMask:NSAnyEventMask untilDate:nil inMode:NSDefaultRunLoopMode dequeue:NO];
+  }
+}
 
 /*
  * returns pointer to the filename, or null if name ends with ':'
@@ -3340,7 +3345,7 @@ to YES and calls handleUpdateEvent() that calls Fl_X::flush(). Fl_X::flush() set
 void Fl_X::q_release_context(Fl_X *x) {
   if (x && x->gc!=fl_gc) return;
   if (!fl_gc) return;
-  CGContextRestoreGState(fl_gc); // KEEP IT: matches the CGContextSaveGState of make_current
+  CGContextRestoreGState(fl_gc); // match the CGContextSaveGState's of make_current
   CGContextRestoreGState(fl_gc);
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
   Fl_X::set_high_resolution(false);