Added Cocoa_canBecomeKeyWindow.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35651 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/cocoa/NSWindow.h

@@ -30,6 +30,8 @@ class wxCocoaNSWindow
 public:
     void AssociateNSWindow(WX_NSWindow cocoaNSWindow);
     void DisassociateNSWindow(WX_NSWindow cocoaNSWindow);
+    virtual bool Cocoa_canBecomeKeyWindow(bool &canBecome)
+    {   return false; }
     virtual bool Cocoa_canBecomeMainWindow(bool &canBecome)
     {   return false; }
     virtual bool CocoaDelegate_windowShouldClose(void) = 0;

src/cocoa/NSWindow.mm

@@ -193,12 +193,22 @@ wxMenuBar* wxCocoaNSWindow::GetAppMenuBar(wxCocoaNSWindow *win)
 {
 }
 
+- (BOOL)canBecomeKeyWindow;
 - (BOOL)canBecomeMainWindow;
 @end // wxPoserNSwindow
 
 WX_IMPLEMENT_POSER(wxPoserNSWindow);
 @implementation wxPoserNSWindow : NSWindow
 
+- (BOOL)canBecomeKeyWindow
+{
+    bool canBecome = false;
+    wxCocoaNSWindow *tlw = wxCocoaNSWindow::GetFromCocoa(self);
+    if(!tlw || !tlw->Cocoa_canBecomeKeyWindow(canBecome))
+        canBecome = [super canBecomeKeyWindow];
+    return canBecome;
+}
+
 - (BOOL)canBecomeMainWindow
 {
     bool canBecome = false;