NSControl flickers on NSView attached to a NSView in full screen mode - objective-c

Question

The setup:
My application has background views that are set into full screen mode using enterFullScreenMode:withOptions:.
To these background views I move a content view as a subview using removeFromSuperview and addSubview:.
Further, there is a preferences view that I add to the content view as described before.
The preferences view comes from a XIB and contains NSControls like checkboxes, circular slides, combo box, ...
The whole setup is much more complicated which makes it very difficult to post code here. Nevertheless, I will add some parts if you request them.
The problem:
When I select any of the controls on the preferences view the elements flicker. That means the checkbox for example disappears and reappears.
I already tried to solve the problem running setNeedsDisplay:, setNeedsLayout or makeKeyAndOrderFront: in the viewDidMoveToSuperview method of the view. Though, nothing helped. What can I do?
Edit 1:
I took a screen capture of the application so you can see what happens.
Edit 2:
Here is the PreferencesViewController.h:
// PreferencesViewController.h
#import <Cocoa/Cocoa.h>
#import "SlideShowModelProtocol.h"
#import "DisplayInfoController.h"
#interface PreferencesViewController : NSViewController {
id<SlideShowModelProtocol> m_localModel;
DisplayInfoController* m_displayInfoController;
}
#property (readonly) id<SlideShowModelProtocol> localModel;
#property (readwrite, assign) IBOutlet DisplayInfoController* displayInfoController;
- (void)moveViewToSuperview:(NSView*)superview;
- (void)showOnView:(NSView*)superview;
- (void)removeViewFromSuperview;
- (BOOL)viewHasSuperview;
- (void)updateModelSettings;
- (IBAction)cancelView:(id)sender;
- (IBAction)confirmView:(id)sender;
#end
... and the implementation PreferencesViewController.m:
// PreferencesViewController.m
#import "PreferencesViewController.h"
#import "ApplicationController.h"
#import "DisplayInfo.h"
#interface PreferencesViewController()
- (void)centerViewOnSuperview;
- (void)loadModel;
#end
#implementation PreferencesViewController
- (id)init {
self = [super initWithNibName:#"PreferencesView" bundle:nil];
if (self != nil) {
m_localModel = nil;
m_displayInfoController = nil; // Assigned in Interface Builder.
}
return self;
}
#synthesize localModel = m_localModel;
#synthesize displayInfoController = m_displayInfoController;
- (void)loadModel {
[self willChangeValueForKey:#"localModel"];
// Retrieve deep copy of the model.
m_localModel = [[[ApplicationController sharedController] model] copyWithZone:nil];
// Reset the table view selection as saved in the model.
NSIndexSet* selectionIndices = [NSIndexSet indexSetWithIndex:[[m_localModel selectedScreenIndex] unsignedIntegerValue]];
[[m_displayInfoController displayInfoTableView] selectRowIndexes:selectionIndices byExtendingSelection:NO];
[self didChangeValueForKey:#"localModel"];
}
/**
Moves and positions the view on the given superview (aka another screen).
#param superview A superview.
*/
- (void)showOnView:(NSView*)superview {
[self moveViewToSuperview:superview];
[self centerViewOnSuperview];
}
/**
Moves the view on the given superview.
#param superview A superview (In full screen mode a background view).
*/
- (void)moveViewToSuperview:(NSView*)superview {
if ([[self view] superview] == superview) {
return;
}
[self loadModel];
[[self view] removeFromSuperview];
[superview addSubview:[self view]];
}
- (void)removeViewFromSuperview {
[[self view] removeFromSuperview];
}
- (void)centerViewOnSuperview {
NSRect superviewFrame = self.view.superview.frame;
NSRect viewFrame = self.view.frame;
float viewFrameWidth = viewFrame.size.width;
float viewFrameHeight = viewFrame.size.height;
float xPos = 0.5f * superviewFrame.size.width - 0.5f * viewFrameWidth;
float yPos = 0.5f * superviewFrame.size.height - 0.5f * viewFrameHeight;
NSRect frame = NSMakeRect(xPos, yPos, viewFrameWidth, viewFrameHeight);
[self.view setFrame:frame];
}
- (BOOL)viewHasSuperview {
return [[self view] superview] != nil;
}
- (void)updateModelSettings {
id<SlideShowModelProtocol> globalModel = [[ApplicationController sharedController] model];
[globalModel setFadeDuration:[m_localModel fadeDuration]];
[globalModel setStayDuration:[m_localModel stayDuration]];
[globalModel setStartWithFirst:[m_localModel startWithFirst]];
[globalModel setSortingMode:[m_localModel sortingMode]];
[globalModel setAnimationIsActive:[m_localModel animationIsActive]];
[globalModel setSelectedScreenIndex:[m_localModel selectedScreenIndex]];
[globalModel setPanAmount:[m_localModel panAmount]];
[globalModel setZoomAmount:[m_localModel zoomAmount]];
[globalModel setZoomFactor:[m_localModel zoomFactor]];
}
#pragma mark -
#pragma mark UserInterface
- (IBAction)cancelView:(id)sender {
[[ApplicationController sharedController] hidePreferencesViewModelSettingsUpdated:NO];
}
- (IBAction)confirmView:(id)sender {
ApplicationController* applicationController = [ApplicationController sharedController];
if ([[applicationController model] isEqualToModel:m_localModel]) {
[self cancelView:sender];
return;
}
[self updateModelSettings];
[applicationController hidePreferencesViewModelSettingsUpdated:YES];
}
#end

Answer 1

As already told in the comments to my post I created a new PreferencesViewTest.xib and added the GUI controls step by step. I also added the bindings, controllers and so on. Everything worked fine - no flickering. Then I assigned RETURN as the key equivalent for the OK button in Interface Builder. I started the application once again to check the behavior .... it flickers! I double checked the phenomenon with the former PreferencesView.xib by removing the key equivalent from the OK button .... it does not flicker! - Crazy shit. But why..?