Implement sending wxIconizeEvent in wxOSX.

Translate windowDid{Miniaturize,Deminiaturize} callbacks to calls to
SendIconizeEvent().

Closes #16718.

(this is a backport of 31e1387541 from master)

docs/changes.txt

@@ -639,6 +639,7 @@ wxOSX:
 - Fix wxSearchCtrl appearance under 10.10 (John Roberts).
 - Generate correct events for WXK_NUMPAD_ENTER (John Roberts).
 - Fix handling of WXK_NUMPAD_ENTER in wxTextCtrl (John Roberts).
+- Send wxIconizeEvent when a window is iconized/restore (Rob Krakora).
 - Fix printing all pages non-interactively (John Roberts).
 - Fix custom paper support (tijsv).
 - Return false from wxSound::Create()/IsOk() if the file doesn't exist.

include/wx/osx/nonownedwnd.h

@@ -114,6 +114,8 @@ public:
     virtual void HandleMoved( double timestampsec );
     virtual void HandleResizing( double timestampsec, wxRect* rect );
 
+    void OSXHandleMiniaturize(double WXUNUSED(timestampsec), bool miniaturized);
+
     void WindowWasPainted();
 
     virtual bool Destroy();

include/wx/osx/toplevel.h

@@ -81,6 +81,9 @@ public:
 
     virtual void SetRepresentedFilename(const wxString& filename);
 
+    // do *not* call this to iconize the frame, this is a private function!
+    void OSXSetIconizeState(bool iconic);
+
 protected:
     // common part of all ctors
     void Init();

interface/wx/event.h

@@ -4210,8 +4210,6 @@ public:
 
     An event being sent when the frame is iconized (minimized) or restored.
 
-    Currently only wxMSW and wxGTK generate such events.
-
     @onlyfor{wxmsw,wxgtk}
 
     @beginEventTable{wxIconizeEvent}

src/osx/cocoa/nonownedwnd.mm

@@ -309,6 +309,8 @@ static NSResponder* s_formerFirstResponder = NULL;
 - (void)windowDidResignKey:(NSNotification *)notification;
 - (void)windowDidBecomeKey:(NSNotification *)notification;
 - (void)windowDidMove:(NSNotification *)notification;
+- (void)windowDidMiniaturize:(NSNotification *)notification;
+- (void)windowDidDeminiaturize:(NSNotification *)notification;
 - (BOOL)windowShouldClose:(id)window;
 - (BOOL)windowShouldZoom:(NSWindow *)window toFrame:(NSRect)newFrame;
 
@@ -397,6 +399,28 @@ extern int wxOSXGetIdFromSelector(SEL action );
     [self triggerMenu:_cmd];
 }
 
+- (void)windowDidMiniaturize:(NSNotification *)notification
+{
+    NSWindow* window = (NSWindow*) [notification object];
+    wxNonOwnedWindowCocoaImpl* windowimpl = [window WX_implementation];
+    if ( windowimpl )
+    {
+        if ( wxNonOwnedWindow* wxpeer = windowimpl->GetWXPeer() )
+            wxpeer->OSXHandleMiniaturize(0, [window isMiniaturized]);
+    }
+}
+
+- (void)windowDidDeminiaturize:(NSNotification *)notification
+{
+    NSWindow* window = (NSWindow*) [notification object];
+    wxNonOwnedWindowCocoaImpl* windowimpl = [window WX_implementation];
+    if ( windowimpl )
+    {
+        if ( wxNonOwnedWindow* wxpeer = windowimpl->GetWXPeer() )
+            wxpeer->OSXHandleMiniaturize(0, [window isMiniaturized]);
+    }
+}
+
 - (BOOL)windowShouldClose:(id)nwindow
 {
     wxNonOwnedWindowCocoaImpl* windowimpl = [(NSWindow*) nwindow WX_implementation];

src/osx/nonownedwnd_osx.cpp

@@ -552,4 +552,12 @@ bool wxNonOwnedWindow::DoSetPathShape(const wxGraphicsPath& path)
     return DoSetRegionShape(wxRegion(bmp));
 }
 
+void
+wxNonOwnedWindow::OSXHandleMiniaturize(double WXUNUSED(timestampsec),
+                                       bool miniaturized)
+{
+    if ( wxTopLevelWindowMac* top = (wxTopLevelWindowMac*) MacGetTopLevelWindow() )
+        top->OSXSetIconizeState(miniaturized);
+}
+
 #endif // wxUSE_GRAPHICS_CONTEXT

src/osx/toplevel_osx.cpp

@@ -224,3 +224,12 @@ void wxTopLevelWindowMac::SetRepresentedFilename(const wxString& filename)
 {
     m_nowpeer->SetRepresentedFilename(filename);
 }
+
+void wxTopLevelWindowMac::OSXSetIconizeState(bool iconize)
+{
+    if ( iconize != m_iconized )
+    {
+        m_iconized = iconize;
+        (void)SendIconizeEvent(iconize);
+    }
+}