How to disable Click through to a NSView behind another NSView

Question

I have two NSViews on top of each other. One NSView presents a table with rows. On clicking a row another view is shown on top of that view.

Now the problem is when I click on an area on the second view where there is a row on the underneath NSView then it gets clicked. How can I stop that?

Thanks

score 15 · Answer 1 · answered May 12 '16 at 15:57

15

On your top level view, implement mouseDown: in that view and do not call nextResponder or do anything in it.

- (void)mouseDown:(NSEvent *)theEvent{
    //Do nothing to not propagate the click event to descendant views   
}

I have the exact same scenario as the OP and this is working for me as intended. Credit to the answer I found here that led me to this.

answered May 12 '16 at 15:57

zic10

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4

This works, but I've noticed the mouse cursor still changes to show whatever action (edit text, click button, etc.) is behind the top `NSView`. Is there a way to totally block the interaction? – Clifton Labrum Mar 23 '20 at 20:32
Did you find a solution? – Starwave Feb 12 '21 at 20:29

score 1 · Answer 2 · edited Apr 18 '22 at 20:49

1

Subclass and implement acceptsFirstMouse in the view, returning YES. Also, set acceptsTouchEvents to YES in that view.

import Cocoa
class UnView: NSView{
    override func acceptsFirstMouse(for event: NSEvent?) -> Bool {
        return false
    }
    override var allowedTouchTypes: NSTouch.TouchTypeMask {
        get { return [] }
        set { }
    }
}

edited Apr 18 '22 at 20:49

Fattie

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answered Jan 06 '16 at 15:15

Peter DeWeese

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Peter DeWeese · Accepted Answer · 2012-07-14T01:53:07.453

-9

You can enable touch and mouse events in the top view when it is presented:

topView.acceptsTouchEvents = YES;
topView.acceptsFirstMouse = YES;

Edit: the comment is correct that acceptsFirstMouse isn't a property, and must be updated in a subclass.

edited Jul 14 '12 at 01:53

answered Jul 13 '12 at 18:33

Peter DeWeese

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I just tried that and it didn't work. I couldn't find acceptsFirstMouse property on NSView. – Leo Jul 13 '12 at 18:40
2

@PeterDeWeese, it seems you have to subclass and return YES in `acceptsFirstMouse` because it isn't a property of NSView. – CodaFi Jul 13 '12 at 19:10
Got no idea about this chaps but I solved my problem by changing the design. Thanks – Leo Jul 13 '12 at 20:06
5

@Leo, why did you accept the answer if it didn't work? – Kelly Bennett Apr 24 '14 at 18:34
Probably because accepting answers gives points to both guys ;) – Etan Jan 06 '16 at 15:12
1

I'll delete my answer to reduce confusion.... Actually I can't because it is accepted. I did add a second one. Feel free to flesh out. – Peter DeWeese Jan 06 '16 at 15:16

How to disable Click through to a NSView behind another NSView

3 Answers3