I have an NSView and basically, even when my mouse doesn't leave the defined frame, just moves within it, mouseExited function is called. Is this how is it suppose to be or am I doing something wrong? There are several subviews of this NSView and it's custom and here's the code for it:
- (id)initWithDelegate:(id)del {
if (self = [super init]) {
[del retain];
delegate = del;
}
return self;
}
- (void)dealloc {
[delegate release];
[super dealloc];
}
- (void)viewDidMoveToWindow {
[self addTrackingRect:[self bounds]
owner:self
userData:nil
assumeInside:NO];
}
- (void)mouseEntered:(NSEvent *)theEvent {
[delegate mouseEntered];
}
- (void)mouseExited:(NSEvent *)theEvent {
NSLog(#"mouse exited");
[delegate mouseExited];
}
- (void)mouseDown:(NSEvent *)theEvent {
[delegate mouseDown];
}
- (NSView *)hitTest:(NSPoint)aPoint {
return self;
}
Thanks.
I figuered it out. After adding a tracking area, i was changing the frame of my view so I needed to recalculate the tracking area. Found this method that will automatically be called whenever tracking area needs to be updated:
- (void)updateTrackingAreas {
Just simply recalculate your tracking area here.
Related
I'm trying to catch drag and drop event in nsviewcontroller, but
draggingEntered
is not called .
here is my code :
- (void)viewDidLoad {
[self.view registerForDraggedTypes:[NSArray arrayWithObjects:NSTIFFPboardType, NSFilenamesPboardType, nil]];
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender{
return NSDragOperationCopy;
}
- (BOOL)prepareForDragOperation:(id )sender {
return YES;
}
I have add custom view , but it doesn't get event too :
#implementation MyView
- (instancetype)initWithCoder:(NSCoder *)coder
{
self = [super initWithCoder:coder];
if (self) {
[self registerForDraggedTypes:[NSArray arrayWithObjects: NSColorPboardType, NSFilenamesPboardType, nil]];
}
return self;
}
- (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender {
return NSDragOperationNone;
}
#end
I tried to change the default cursor in my cocoa application. I read about this but the standard approach isn't working for me.
I try to add to my OpenGLView subclass this method:
- (void) resetCursorRects
{
[super resetCursorRects];
NSCursor * myCur = [[NSCursor alloc] initWithImage:[NSImage imageNamed:#"1.png"] hotSpot:NSMakePoint(8,0)];
[self addCursorRect: [self bounds]
cursor: myCur];
NSLog(#"Reset cursor rect!");
}
It`s not working. Why?
There're two ways you can do it. First - the most simple - is to change the cursor while the mouse enters the view and leaves it.
- (void)mouseEntered:(NSEvent *)event
{
[super mouseEntered:event];
[[NSCursor pointingHandCursor] set];
}
- (void)mouseExited:(NSEvent *)event
{
[super mouseExited:event];
[[NSCursor arrowCursor] set];
}
Another way is to create tracking area (i.e. in awakeFromNib-method), and override - (void)cursorUpdate:-method
- (void)createTrackingArea
{
NSTrackingAreaOptions options = NSTrackingInVisibleRect | NSTrackingCursorUpdate;
NSTrackingArea *area = [[NSTrackingArea alloc] initWithRect:self.bounds options:options owner:self userInfo:nil];
[self addTrackingArea:area];
}
- (void)cursorUpdate:(NSEvent *)event
{
[[NSCursor pointingHandCursor] set];
}
For those of you looking for a Swift solution, the syntax is:
override func mouseEntered(with event: NSEvent) {
super.mouseEntered(with: event)
NSCursor.pointingHand.set()
}
I'm working on an application that has a window with a fully sized NSOpenGLView. I'm using [view addCursorRect] and [cursor set] to show a custom cursor, but when I press any key on the keyboard, the cursor resets to the default arrow. I've also tried overriding resetCursorRects and calling invalidateCursorRects when a key is pressed, which results in a flickering cursor.
The cursor switches back to my custom cursor when I click anywhere in the view, so I suppose the keyboard presses somehow unfocus my view. Is there any way to prevent the view from becoming unfocused when I press a key?
You need to remember your cursor settings + when you need to reset call e.g refreshCursor method. Example implementation:
- (void)refreshCursor
{
NSCursor *cursor = nil;
if ([self graphic]) {
cursor = [graphic hoverCursorForPoint:[self mousePosition]];
} else if ([self group]){
cursor = [NSCursor openHandCursor];
}
[self setHoverCursor:cursor];
[self refresh];
}
- (void)updateTrackingAreas
{
[super updateTrackingAreas];
[self removeTrackingArea:[self trackingArea]];
NSTrackingArea *area = [[NSTrackingArea alloc] initWithRect:[self visibleRect]
options:NSTrackingActiveAlways|NSTrackingMouseEnteredAndExited|NSTrackingMouseMoved
owner:self userInfo:nil];
[self setTrackingArea:area];
[self addTrackingArea:[self trackingArea]];
}
- (void)setCursorRects
{
[self discardCursorRects];
if ([self hoverCursor]) {
[self addCursorRect:[self visibleRect] cursor:[self hoverCursor]];
}
}
- (void)setHoverCursor:(NSCursor *)hoverCursor {
if (_hoverCursor != hoverCursor) {
_hoverCursor = hoverCursor;
[self setCursorRects];
}
}
- (void)resetCursorRects {
[super resetCursorRects];
[self setCursorRects];
}
- (void)mouseExited:(NSEvent *)event
{
[[NSCursor currentSystemCursor] set];
}
- (void)mouseEntered:(NSEvent *)event
{
}
- (void)mouseMoved:(NSEvent *)event
{
[self refreshCursor];
}
- (void)keyUp:(NSEvent *)event
{
[self refreshCursor];
}
//allow key events
- (BOOL)acceptsFirstResponder
{
return YES;
}
Yes, It might be a duplicate question of this. But since it didn't get an answer, I will be more specific on the case and code:
I have 3 involved UIViewControllers:
WelcomeView - the first one
TakePhotoViewController - the second one who is delegate of the OverlayviewController
OverlayViewController - custom view for the camera.
Scenario:
User enter WelcomeView and clicks on a button to be transfered with segue to TakeView.
UIImageViewController is being opened to take a photo.
The user clicks on cancel button - didCancelCamera method in TakePhotoViewController is being invoked and he returns to WelcomeView
The user leaves the app.
The user re-opens the app and perform step 1 again.
THE IMAGE PICKER IS NOT BEING OPENED. I COULD TAKE A PHOTO AND IT'S OK - BUT THE USER CAN'T SEE WHAT HE IS TAKING.
OverlayViewController.h
#interface OverlayViewController : BaseViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
#property (nonatomic,weak) id<OverlayViewControllerDelegate> delegate;
#property (nonatomic,retain) UIImagePickerController *imagePickerController;
#end
OverlayViewController.m:
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self) {
self.imagePickerController = [[UIImagePickerController alloc] init];
self.imagePickerController.delegate = self;
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor clearColor];
}
- (IBAction)takePicture:(id)sender {
[self.imagePickerController takePicture];
}
- (IBAction)cancelImagePicker:(id)sender {
[self.delegate didCancelCamera];
}
- (void) setupImagePicker:(UIImagePickerControllerSourceType) sourceType
{
self.imagePickerController.sourceType = sourceType;
if (sourceType == UIImagePickerControllerSourceTypeCamera)
{
self.imagePickerController.showsCameraControls = NO;
if ([[self.imagePickerController.cameraOverlayView subviews] count] ==0)
{
CGRect overlayViewFrame = self.imagePickerController.cameraOverlayView.frame;
CGRect newFrame = CGRectMake(0.0, CGRectGetHeight(overlayViewFrame)-self.view.frame.size.height-10.0, CGRectGetWidth(overlayViewFrame), self.view.frame.size.height + 10.0);
self.view.frame = newFrame;
[self.imagePickerController.cameraOverlayView addSubview:self.view];
}
}
}
- (void)finishAndUpdate
{
[NSThread detachNewThreadSelector:#selector(threadStartAnimating:) toTarget:self withObject:nil];
[self.delegate didFinishWithCamera]; // tell our delegate we are done with the camera
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[self finishAndUpdate];
}
TakePhotoViewController.h
#interface TakePhotoViewController : BaseViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate,OverlayViewControllerDelegate>
#property (nonatomic, retain) OverlayViewController *overlayViewController;
#end
TakePhotoViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
UIStoryboard *sb = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
// Insert the overlay
self.overlayViewController = (OverlayViewController *)[sb instantiateViewControllerWithIdentifier:#"Overlay"];
self.overlayViewController.delegate = self;
}
- (void)viewDidUnload
{
self.overlayViewController = nil;
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (void)openImagePicker {
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
[self showImagePicker:UIImagePickerControllerSourceTypeCamera];
}
else{
[self showImagePicker:UIImagePickerControllerSourceTypePhotoLibrary];
}
}
- (void)viewDidAppear:(BOOL)animated{
if (appDelegate.shouldOpenPicker){
[self openImagePicker];
}
}
- (void)showImagePicker:(UIImagePickerControllerSourceType)sourceType
{
if ([UIImagePickerController isSourceTypeAvailable:sourceType])
{
[self.overlayViewController setupImagePicker:sourceType];
[self presentViewController:self.overlayViewController.imagePickerController animated:YES completion:nil];
}
}
-(void)didCancelCamera{
[[self.overlayViewController.imagePickerController presentingViewController] dismissViewControllerAnimated:NO completion:^ {
[self performSegueWithIdentifier:#"fromTakeToWelcome" sender:self];
}];
}
I found the bug.
The method
-(void)didCancelCamera from TakePhotoViewController is being called when the user clicks on - (IBAction)cancelImagePicker:(id)sender in OverlayViewController.
However, somehow the code in didCancelCamera causes viewDidAppear method of TakePhotoViewController to be invoked again and reopen the image picker.
I have no idea why
[[self.overlayViewController.imagePickerController presentingViewController] dismissViewControllerAnimated:NO completion:^ {
[self performSegueWithIdentifier:#"fromTakeToWelcome" sender:self];
}];
causes the viewDidAppear method of that view (TakePhoto) being recalled again.
Hope that it will help someone
I subclassed a UIButton, and I want to give all instances of my newButton the same background image, among other things. I thought I found the right init method in initWithCoder, but it just gets called for the first newButton. I did a little test by changing the text size to something massive, and only the first newButtons text size was changed.
I can use drawRect:, and it works just fine. But I was told that is not a good method to use.
Does anyone know which method will get called, so that I can make some adjustments?
#implementation LCHButton
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self setDefaults];
}
return self;
}
-(id)init
{
self = [super init];
if (self) {
[self setDefaults];
}
return self;
}
-(id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self) {
[self setDefaults];
}
return self;
}
-(void)setDefaults
{
[self setBackgroundImage:[[UIImage imageNamed:#"submitBtn.png"] stretchableImageWithLeftCapWidth:5 topCapHeight:0] forState:UIControlStateNormal];
self.titleLabel.font = [UIFont fontWithName:#"Museo-500" size:17];
}
#end
This will change only the first button