Actually propagate setAcceptsMouseMovedEvents to XSelectInput()

X11Display already has the code to drop mouse moved events in case
the window does not want them; but we weren't getting the events in
the first place because they were filtered out on the server side.

Fixes, among other things, NSMenu not reacting to clicks properly,
because it was assuming the clicked item was not the selected one
as it could not see the mouse hovering over it.

AppKit/NSWindow.m

@@ -976,6 +976,7 @@ NSString * const NSWindowDidAnimateNotification=@"NSWindowDidAnimateNotification
 
 -(void)setAcceptsMouseMovedEvents:(BOOL)flag {
    _acceptsMouseMovedEvents=flag;
+   [_platformWindow syncDelegateProperties];
 }
 
 -(void)setExcludedFromWindowsMenu:(BOOL)value {

AppKit/X11.backend/X11Window.m

@@ -95,8 +95,7 @@
                               (_visualInfo==NULL)?CopyFromParent:_visualInfo->visual,
                               xattr_mask, &xattr);
 
-   XSelectInput(_display, _window, ExposureMask | KeyPressMask | KeyReleaseMask | StructureNotifyMask |
-    ButtonPressMask | ButtonReleaseMask | ButtonMotionMask | VisibilityChangeMask | FocusChangeMask | SubstructureRedirectMask );
+   [self syncDelegateProperties];
 
    Atom atm=XInternAtom(_display, "WM_DELETE_WINDOW", False);
    XSetWMProtocols(_display, _window, &atm , 1);
@@ -157,12 +156,27 @@
 
 -(void)setDelegate:delegate {
    _delegate=delegate;
+   [self syncDelegateProperties];
 }
 
 -delegate {
    return _delegate;
 }
 
+- (void) syncDelegateProperties {
+    long mask = KeyPressMask | KeyReleaseMask |
+        ExposureMask | StructureNotifyMask |
+        ButtonPressMask | ButtonReleaseMask | ButtonMotionMask |
+        VisibilityChangeMask | FocusChangeMask | SubstructureRedirectMask;
+
+    if ([_delegate acceptsMouseMovedEvents]) {
+        mask |= PointerMotionMask;
+    }
+    XSelectInput(_display, _window, mask);
+
+    // TODO: background color
+}
+
 -(void) invalidate {
     // This is essentially dealloc; we release our contexts
     // and windows, but unlike dealloc, this method can be called

CoreGraphics/CGWindow.m

@@ -23,6 +23,10 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
    O2InvalidAbstractInvocation();
 }
 
+- (void) syncDelegateProperties {
+  O2InvalidAbstractInvocation();
+}
+
 
 -(O2Context *)cgContext {
    O2InvalidAbstractInvocation();

CoreGraphics/include/CoreGraphics/CGWindow.h

@@ -25,6 +25,7 @@ typedef enum {
 - delegate;
 
 - (void)invalidate;
+- (void)syncDelegateProperties;
 
 - (O2Context *)cgContext;