MouseExited called when mouse enter subview

[Naituw]

Every time I move cursor into a TUITableViewCell's subview, TUIView will call cell's mouseExited. but cursor is still in cell. Is there any way to know when cursor exited the cell to another cell. Thanks!

[choco]

Can you post your code please? Right now I can't reproduce your problem. Are you tracking the subview with mouseEntered:onSubview: or you set the delegate to the tableviewcell view?

[Naituw]

Like Twitter for Mac, If I move cursor to a cell , will call cell's mouseEntered: method.Then I move cursor to a profile image , mouseExited: will be called , I don't wanna this happen .

in my TUITableViewCell subclass：

- (void)mouseEntered:(NSEvent *)theEvent{
    [super mouseEntered:theEvent];
    isMouseInside = YES;
}

- (void)mouseExited:(NSEvent *)theEvent{
    [super mouseExited:theEvent];
    isMouseInside = NO;
}

move cursor to profile image will set isMouseInside to NO...

[choco]

Oh I understand...
You could try to use isPointInside inside mouseExited to check if the pointer really exited the tableviewcell like:

if([self pointInside:[self localPointForEvent:theEvent] withEvent:theEvent]) {
    NSLog(@"You're still inside the cell!");
}

But actually I'm not sure if this is the best way!

[Naituw]

Thanks~ I'm coding like this now:

- (void)mouseExited:(NSEvent *)theEvent{
    if (![self eventInside:theEvent]) {
        isMouseInside = NO;
        [TUIView animateWithDuration:0.3 animations:^{
            [self redraw];
        }];
    }
    else{
        // mouse still inside.
    }
}

[choco]

The downside of this solution is that if the mouse exits from the part where is located the scroll knob the appellation will think that the mouse is still inside.....
I think we should find a better way.

[Naituw]

I added below code to avoid this problem, just like most app does :P

- (void)scrollWheel:(NSEvent *)theEvent {
    [super scrollWheel:theEvent];
    isMouseInside = NO;
}

[choco]

Are you sure this solves the problem? Because just tested it and it doesn't work! That method gets called only when you scroll.

[choco]

Only wanted to note that I solved using view:mouseEntered and view:mouseExited. It's more like a hack than a solution but it works pretty well and I think it's the way Twitter for mac uses.

[Naituw]

How did you done this?

in TUIView+Event.m

- (void)mouseExited:(NSEvent *)event
{
  if(self.superview != nil){
    [self.superview mouseExited:event fromSubview:self];
  }
    if(_viewFlags.delegateMouseExited){
        [_viewDelegate view:self mouseExited:event];
    }
}

I have noticed it , but it seems only call in - (void)mouseExited:(NSEvent *)event , and pass cell self to delegate .

[choco]

You just need to create another instance variable isMouseInsideSubview and then use it to check if we are inside a subview setting its value by subclassing the methods

-(void)view:(TUIView *)v mouseEntered:(NSEvent *)event
{
    ismouseinsidesubview=YES;
}

-(void)view:(TUIView *)v mouseExited:(NSEvent *)event
{
    ismouseinsidesubview=NO;
}

and later checking this value inside the mouseExited:(NSEvent *)event and mouseEntered:(NSEvent *)event.

Another way to accomplish the same result is to set the subviews inside the the main cell view userinteractionenabled=NO and then react to the events relative to them by using the point inside method, just like it's done for the scroll knob.

[Naituw]

Thanks~~ I'v done it too~ you can simply move ismouseinsidesubview=YES; to

- (void)mouseEntered:(NSEvent *)event onSubview:(TUIView *)subview{
    if (!_cellFlags.isMouseInSubView) {
        _cellFlags.isMouseInSubView = YES;
    }
    if (!_cellFlags.isMouseInside) {
        _cellFlags.isMouseInside = YES;
        [self updateViewAnimated];
    }
}

that delegate method called in cell's [super mouseEntered:theEvent];

[mrjjwright]

Here is how I handled that in a simple view

    - (void) userIsHovering {
        if (_tracking) {
            [self setControlsHidden:NO];
        }
    }

    - (void) mouseEntered:(NSEvent *)theEvent {
        _tracking = YES;
        [self performSelector:@selector(userIsHovering) withObject:nil afterDelay:0.9];
    }

    - (void) mouseEntered:(NSEvent *)event onSubview:(TUIView *)subview {
        _tracking = YES;
        _trackingSubview = YES;
    }

    -(void) mouseExited:(NSEvent *)event fromSubview:(TUIView *)subview {
        _trackingSubview  = NO;
    }

    - (void) mouseExited:(NSEvent *)theEvent {
        if (!_trackingSubview) {
            _tracking = NO;
        }

        if (!collapsed && !_tracking) {
            [self setControlsHidden:YES];
        }
    }