cocoaui: fix became/resigned key handler in DdbSeekBar, PlaylistHeaderView and DdbTabStrip

Author: Oleksiy-Yakovenko

plugins/cocoaui/DdbTabStrip/DdbTabStrip.m

@@ -208,15 +208,17 @@ - (void)setup {
     [NSNotificationCenter.defaultCenter addObserver:self
                                            selector:@selector(windowDidBecomeKey:)
                                                name:NSWindowDidBecomeKeyNotification
-                                             object:self.window];
+                                             object:nil];
     [NSNotificationCenter.defaultCenter addObserver:self
                                            selector:@selector(windowDidBecomeKey:)
                                                name:NSWindowDidResignKeyNotification
-                                             object:self.window];
+                                             object:nil];
 }
 
-- (void)windowDidBecomeKey:(id)sender {
-    self.needsDisplay = YES;
+- (void)windowDidBecomeKey:(NSNotification *)notification {
+    if (notification.object == self.window) {
+        self.needsDisplay = YES;
+    }
 }
 
 - (int)tabWidthForIndex:(int)tab {

plugins/cocoaui/Playlist/PlaylistHeaderView.m

@@ -93,17 +93,19 @@ - (PlaylistHeaderView *)initWithFrame:(NSRect)rect {
     [NSNotificationCenter.defaultCenter addObserver:self
                                            selector:@selector(windowDidBecomeOrResignKey:)
                                                name:NSWindowDidBecomeKeyNotification
-                                             object:self.window];
+                                             object:nil];
     [NSNotificationCenter.defaultCenter addObserver:self
                                            selector:@selector(windowDidBecomeOrResignKey:)
                                                name:NSWindowDidResignKeyNotification
-                                             object:self.window];
+                                             object:nil];
 
     return self;
 }
 
 - (void)windowDidBecomeOrResignKey:(NSNotification *)notification {
-    self.needsDisplay = YES;
+    if (notification.object == self.window) {
+        self.needsDisplay = YES;
+    }
 }
 
 - (void)drawColumnHeader:(DdbListviewCol_t)col inRect:(NSRect)rect {

plugins/cocoaui/widgets/DdbSeekBar.m

@@ -232,6 +232,9 @@ - (void)updateThumbColors {
 }
 
 - (void)becameKey:(NSNotification *)notification {
+    if (notification.object != self.window) {
+        return;
+    }
     [CATransaction begin];
     [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
     self.isKey = YES;
@@ -242,6 +245,9 @@ - (void)becameKey:(NSNotification *)notification {
 }
 
 - (void)resignedKey:(NSNotification *)notification {
+    if (notification.object != self.window) {
+        return;
+    }
     [CATransaction begin];
     [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
     self.isKey = NO;