In order to get all focus set events, store field in editor and catch

becomeFirstResponder there

See #14269.

(this is a backport of cea11b5 from master)

include/wx/osx/cocoa/private.h

@@ -324,8 +324,10 @@ public:
     @interface wxNSTextFieldEditor : NSTextView
     {
         NSEvent* lastKeyDownEvent;
+        NSTextField* textField;
     }
 
+    - (void) setTextField:(NSTextField*) field;
     @end
 
     @interface wxNSTextField : NSTextField wxOSX_10_6_AND_LATER(<NSTextFieldDelegate>)

src/osx/cocoa/nonownedwnd.mm

@@ -507,6 +507,7 @@ extern int wxOSXGetIdFromSelector(SEL action );
         {
             editor = [[wxNSTextFieldEditor alloc] init];
             [editor setFieldEditor:YES];
+            [editor setTextField:tf];
             [tf setFieldEditor:editor];
             [editor release];
         }
@@ -520,6 +521,7 @@ extern int wxOSXGetIdFromSelector(SEL action );
         {
             editor = [[wxNSTextFieldEditor alloc] init];
             [editor setFieldEditor:YES];
+            [editor setTextField:cb];
             [cb setFieldEditor:editor];
             [editor release];
         }

src/osx/cocoa/textctrl.mm

@@ -298,6 +298,29 @@ NSView* wxMacEditHelper::ms_viewCurrentlyEdited = nil;
     [super insertText:str];
 }
 
+- (BOOL) resignFirstResponder
+{
+    return [super resignFirstResponder];
+}
+
+- (BOOL) becomeFirstResponder
+{
+    // we need the stored text field, as at this point the delegate is not yet set
+    wxWidgetCocoaImpl* impl = (wxWidgetCocoaImpl* ) wxWidgetImpl::FindFromWXWidget( (WXWidget) textField );
+
+    BOOL r = [super becomeFirstResponder];
+    if ( impl != NULL && r )
+        impl->DoNotifyFocusSet();
+    
+    return r;
+}
+
+- (void) setTextField:(NSTextField*) field
+{
+    textField = field;
+}
+
+
 @end
 
 @implementation wxNSTextView