NSImageView double click action

Question

I have some NSImageView in my Mac App where the user can drag'n drop objects like .png or .pdf, to store them into User Shared Defaults, that works fine.

I would now like to set an action for when user double click on these NSImageView, but it seems to be a little bit difficult (I had no trouble for NSTableView, but 'setDoubleAction' is not available for NSImage, and tons of answers (here or with google) concerning NSImageView's actions point to making a NSButton instead of NSImageView, so that doesn't help)

Here is part of my AppDelegate.h:

@interface AppDelegate : NSObject <NSApplicationDelegate>{

    (...)

    @property (assign) IBOutlet NSImageView *iconeStatus;

    (...)

@end

and here is part of my AppDelegate.m:

#import "AppDelegate.h"

@implementation AppDelegate

(...)

@synthesize iconeStatus = _iconeStatus;

(...)

- (void)awakeFromNib {

    (...)

[_iconeStatus setTarget:self];
[_iconeStatus setAction:@selector(doubleClick:)];

    (...)

}

(...)

- (void)doubleClick:(id)object {
        //make sound if that works ...
        [[NSSound soundNamed:@"Basso"] play];

}

But that doesn't work.

Can anyone tell me what's the easiest way to do this ?

Answer 1

You need to subclass NSImageView and add the following method to your subclass's implementation:

- (void)mouseDown:(NSEvent *)theEvent
{
    NSInteger clickCount = [theEvent clickCount];

    if (clickCount > 1) {
        // User at least double clicked in image view
    }
}

Answer 2

Code for Swift 4. Again the NSImageView is subclassed and the mouseDown function is overridden.

class MyImageView: NSImageView {

    override func mouseDown(with event: NSEvent) {
        let clickCount: Int = event.clickCount

        if clickCount > 1 {
            // User at least double clicked in image view
        }
    }

}

Answer 3

Another solution using extension:

extension NSImageView {
    override open func mouseDown(with event: NSEvent) {
        // your code here
    }
}

Although this will add that functionality to every NSImageView, so perhaps that's not what you're looking for.