MAINT-3569 FIXED Handle window hide/unhide and minimize/unminimize events on mac.

indra/llwindow/llopenglview-objc.mm

@@ -124,6 +124,14 @@ attributedStringInfo getSegments(NSAttributedString *str)
 {
 	[[NSNotificationCenter defaultCenter] addObserver:self
 											 selector:@selector(windowResized:) name:NSWindowDidResizeNotification
+											   object:[self window]];    
+ 
+    [[NSNotificationCenter defaultCenter] addObserver:self
+											 selector:@selector(windowWillMiniaturize:) name:NSWindowWillMiniaturizeNotification
+											   object:[self window]];
+    
+    [[NSNotificationCenter defaultCenter] addObserver:self
+											 selector:@selector(windowDidDeminiaturize:) name:NSWindowDidDeminiaturizeNotification
 											   object:[self window]];
 }
 
@@ -141,6 +149,16 @@ attributedStringInfo getSegments(NSAttributedString *str)
     }
 }
 
+- (void)windowWillMiniaturize:(NSNotification *)notification;
+{
+    callWindowHide();
+}
+
+- (void)windowDidDeminiaturize:(NSNotification *)notification;
+{
+    callWindowUnhide();
+}
+
 - (void)dealloc
 {
 	[[NSNotificationCenter defaultCenter] removeObserver:self];

indra/llwindow/llwindowmacosx-objc.h

@@ -116,6 +116,8 @@ void callScrollMoved(float delta);
 void callMouseExit();
 void callWindowFocus();
 void callWindowUnfocus();
+void callWindowHide();
+void callWindowUnhide();
 void callDeltaUpdate(float *delta, unsigned int mask);
 void callMiddleMouseDown(float *pos, unsigned int mask);
 void callMiddleMouseUp(float *pos, unsigned int mask);

indra/llwindow/llwindowmacosx.cpp

@@ -349,6 +349,22 @@ void callWindowUnfocus()
 	gWindowImplementation->getCallbacks()->handleFocusLost(gWindowImplementation);
 }
 
+void callWindowHide()
+{	
+	if ( gWindowImplementation && gWindowImplementation->getCallbacks() )
+	{
+		gWindowImplementation->getCallbacks()->handleActivate(gWindowImplementation, false);
+	}
+}
+
+void callWindowUnhide()
+{	
+	if ( gWindowImplementation && gWindowImplementation->getCallbacks() )
+	{
+		gWindowImplementation->getCallbacks()->handleActivate(gWindowImplementation, true);
+	}
+}
+
 void callDeltaUpdate(float *delta, MASK mask)
 {
 	gWindowImplementation->updateMouseDeltas(delta);

indra/newview/llappdelegate-objc.mm

@@ -84,6 +84,16 @@
 	callWindowUnfocus();
 }
 
+- (void) applicationDidHide:(NSNotification *)notification
+{
+	callWindowHide();
+}
+
+- (void) applicationDidUnhide:(NSNotification *)notification
+{
+	callWindowUnhide();
+}
+
 - (NSApplicationDelegateReply) applicationShouldTerminate:(NSApplication *)sender
 {
 	if (!runMainLoop())