provide imageview single touch callback

[ghost]

when user just touch the imageview with single finger provide the callback as onClickListener()

[eddiemuc]

I see that there is already a PR for this issue since a year. Any progress on this?

[eddiemuc]

As a workaround I registered an own TouchListener to the imageview container (overriding the one registered by Loupe). This Listener forwards all events to Loupe, but it also uses a second GestureDetector instance to detect single taps.

A crude workaround though. I really hope this PR gets merged through.

My code (sorry, it is Java...)

            final Loupe loupe = new Loupe(binding.imageFull, binding.imageviewViewroot);
            loupe.setOnViewTranslateListener(new Loupe.OnViewTranslateListener() {
                @Override
                public void onStart(@NonNull final ImageView imageView) {
                    //empty on purpose
                }

                @Override
                public void onViewTranslate(@NonNull final ImageView imageView, final  float v) {
                    //empty on purpose
                }

                @Override
                public void onDismiss(@NonNull final ImageView imageView) {
                    //close detail view on "fling down"
                    finish();
                }

                @Override
                public void onRestore(@NonNull final ImageView imageView) {
                    //empty on purpose
                }
            });

            //Loupe is unable to detect single clicks (see https://github.com/igreenwood/loupe/issues/25)
            //As a workaround we register a second GestureDetector on top of the one installed by Loupe to detect single taps
            //Workaround START
            final GestureDetector singleTapDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
                @Override
                public boolean onSingleTapConfirmed(final MotionEvent e) {
                    //Logic to happen on single tap:
                    inverseFullImageView(binding);
                    return true;
                }
            });
            //Registering an own touch listener overrides the TouchListener registered by Loupe
            binding.imageviewViewroot.setOnTouchListener((v, event) -> {
                //perform singleTap detection
                singleTapDetector.onTouchEvent(event);
                //pass through event to Loupe so it handles all other gestures correctly
                return loupe.onTouch(v, event);
            });
            //Workaround END