NEWT/OSX: Proper impl. of NEWT's focus management (fixes NEWT/AWT focus behavior/tests)

- Old code was just requesting the focus and made the window upfront
  and notifying a gained focus to WindowImpl. (hack)

- Using proper requestFocus impl. issuing focusAction() and utilizing native
  focus gained/lost messages. This distinguish between 'makeKey' and 'orderFront'.
  Also requesting and accepting (view) first responder role, which is a precursor
  to proper gained/lost focus handling on OSX.

- NEWTCanvasAWT: Adding 'steal AWT focus':
   +++
   void requestFocus() {
     super.requestFocus(); // AWT
     < steal AWT focus >
     NEWTChild.requestFocus()
   }
   +++
   Helps make the focus traversal between NEWT/AWT more reliable.
   Happend on OSX that AWT (NewtCanvasAWT instance) didn't release the focus
   after NEWT child gained the same.
   We are not able to use the 'focusAction()' here (disabled in this code path)
   due to AWT-EDT blocking and recursive focus changes. The latter is also
   intendend to request the AWT focus first ..

- AWT/NEWT focus test 01 passes on OSX

1 files changed, 43 insertions, 0 deletions

diff --git a/src/newt/native/NewtMacWindow.m b/src/newt/native/NewtMacWindow.m
index d4e2c2b6d..bb7fddb60 100644
--- a/src/newt/native/NewtMacWindow.m
+++ b/src/newt/native/NewtMacWindow.m
@@ -213,6 +213,11 @@ static jmethodID windowDestroyNotifyID = NULL;
     [super viewDidUnhide];
 }
 
+- (BOOL)acceptsFirstResponder 
+{
+    return YES;
+}
+
 @end
 
 @implementation NewtMacWindow
@@ -742,8 +747,33 @@ static jint mods2JavaMods(NSUInteger mods)
     [pool release];
 }
 
+- (BOOL) becomeFirstResponder
+{
+    DBG_PRINT( "*************** becomeFirstResponder\n");
+    return [super becomeFirstResponder];
+}
+
+- (BOOL) resignFirstResponder
+{
+    DBG_PRINT( "*************** resignFirstResponder\n");
+    return [super resignFirstResponder];
+}
+
+- (void) becomeKeyWindow
+{
+    DBG_PRINT( "*************** becomeKeyWindow\n");
+    [super becomeKeyWindow];
+}
+
 - (void) windowDidBecomeKey: (NSNotification *) notification
 {
+    DBG_PRINT( "*************** windowDidBecomeKey\n");
+    [self sendFocusGained];
+}
+
+- (void) sendFocusGained
+{
+    DBG_PRINT( "sendFocusGained\n");
     NSView* nsview = [self contentView];
     if( ! [nsview isMemberOfClass:[NewtView class]] ) {
         return;
@@ -769,8 +799,21 @@ static jint mods2JavaMods(NSUInteger mods)
     }
 }
 
+- (void) resignKeyWindow
+{
+    DBG_PRINT( "*************** becomeKeyWindow\n");
+    [super becomeKeyWindow];
+}
+
 - (void) windowDidResignKey: (NSNotification *) notification
 {
+    DBG_PRINT( "*************** windowDidResignKey\n");
+    [self sendFocusLost];
+}
+
+- (void) sendFocusLost
+{
+    DBG_PRINT( "sendFocusLost\n");
     NSView* nsview = [self contentView];
     if( ! [nsview isMemberOfClass:[NewtView class]] ) {
         return;