[OSX] ensure window state is obeyed.

native/Avalonia.Native/src/OSX/AvnWindow.mm

@@ -199,6 +199,8 @@
     [self backingScaleFactor];
 }
 
+
+
 - (void)windowWillClose:(NSNotification *)notification
 {
     _closed = true;
@@ -380,6 +382,11 @@
 
         if(cparent != nullptr)
         {
+            if(!cparent->IsShown())
+            {
+                return;
+            }
+
             if(cparent->WindowState() == Maximized)
             {
                 cparent->SetWindowState(Normal);

native/Avalonia.Native/src/OSX/WindowBaseImpl.h

@@ -60,6 +60,8 @@ BEGIN_INTERFACE_MAP()
 
     virtual HRESULT Show(bool activate, bool isDialog) override;
 
+    virtual bool IsShown ();
+
     virtual bool ShouldTakeFocusOnShow();
 
     virtual HRESULT Hide() override;

native/Avalonia.Native/src/OSX/WindowBaseImpl.mm

@@ -116,6 +116,11 @@ HRESULT WindowBaseImpl::Show(bool activate, bool isDialog) {
     }
 }
 
+bool WindowBaseImpl::IsShown ()
+{
+    return _shown;
+}
+
 bool WindowBaseImpl::ShouldTakeFocusOnShow() {
     return true;
 }
@@ -567,7 +572,6 @@ void WindowBaseImpl::InitialiseNSWindow() {
         [Window setContentMaxSize:lastMaxSize];
 
         [Window setOpaque:false];
-
         [Window center];
 
         if (lastMenu != nullptr) {

native/Avalonia.Native/src/OSX/WindowImpl.mm

@@ -430,6 +430,9 @@ HRESULT WindowImpl::SetWindowState(AvnWindowState state) {
     START_COM_CALL;
 
     @autoreleasepool {
+        auto currentState = _actualWindowState;
+        _lastWindowState = state;
+
         if (Window == nullptr) {
             return S_OK;
         }
@@ -440,9 +443,6 @@ HRESULT WindowImpl::SetWindowState(AvnWindowState state) {
 
         _inSetWindowState = true;
 
-        auto currentState = _actualWindowState;
-        _lastWindowState = state;
-
         if (currentState == Normal) {
             _preZoomSize = [Window frame];
         }