I did a combination..
I've created a subclass of GestureOverlayView as you have suggested, and
then the approach with
dispatchTouchEvent(MotionEvent)<http://developer.android.com/reference/android/view/ViewGroup.html#dispatchTouchEvent%28android.view.MotionEvent%29>didn't
work.
One problem was the big numbers, and the second one was that important
callbacks like *OnGesturePerformedListener* that used for gesture
recognition at the end of the user's motion, were not called at
all...probably because of the Gesture\Touch system, which intercepts one
another :)
The final result was that the subclass also implemented
*OnGestureListener*which has 4 methods:
@Override
public void onGesture(GestureOverlayView overlay, MotionEvent event)
@Override
public void onGestureCancelled(GestureOverlayView overlay, MotionEvent
event)
@Override
public void onGestureEnded(GestureOverlayView overlay, MotionEvent
event)
@Override
public void onGestureStarted(GestureOverlayView overlay, MotionEvent
event)
Then I could control the beginning and the ending of the gesture, and *
OnGesturePerformedListener* did called, and performed it's actions from the
main activity
Quite a shame that there are no documentations to the Gesture\Touch system
On Saturday, August 24, 2013 8:14:53 PM UTC+3, Nobu Games wrote:
>
> You could still try the approach I described by getting rawX and rawY from
> the motion event and match it with the global rect position of the target
> view. Motion event coordinates are usually in a local coordinate system. I
> guess the local coordinate system is the one of the ImageView you start
> your gesture with, hence the too big numbers when you get your
> ACTION_CANCEL on the other view.
>
> On Saturday, August 24, 2013 5:19:04 AM UTC-5, OronS wrote:
>>
>> Little search showed that ACTION_CANCEL is the right value to get from
>> the system, but the (X,Y) values on this event are not proportional to the
>> gesture I made :S
>> Y values are way bigger than expected
>> I did expand the HitRect size, but it's still too big
>>
>> On Friday, August 23, 2013 10:24:03 PM UTC+3, OronS wrote:
>>>
>>> Hi :)
>>> Thanks for your post
>>>
>>> I'm trying to implement specific gesture between images...no drag & drop
>>> The images are inside *GestureOverlayView (because of prediction =
>>> gestureLibrary.recognize()...I don't know how to recognize a gestures which
>>> have curls or shapes)*, and I thought the parent intercepts touch event
>>> automatically (by automatically I mean set the OnTouch listener to the
>>> parent).
>>> Don't you think inheritance is wrongly used in this case??
>>>
>>> Anyway..I used *gestureOverlayView.setOnTouchListener* to intercept
>>> touch events on children, and *
>>> gestureOverlayView.addOnGesturePerformedListener* to check whether the
>>> gesture was recognized, and user's finger passed through both images.
>>>
>>> The problem now is that in *gestureOverlayView.setOnTouchListener,*instead
>>> of ACTION_UP, I get ACTION_CANCEL :S
>>>
>>> I don't know if it should be like that
>>>
>>> On Friday, August 23, 2013 6:17:23 PM UTC+3, Nobu Games wrote:
>>>>
>>>> Is it just gestures or are you trying to implement drag and
>>>> drop<http://developer.android.com/guide/topics/ui/drag-drop.html>(because
>>>> it sounds like that). Either way you could just intercept motion
>>>> events in the parent view group that contains your images and let it
>>>> handle
>>>> your gesture recognition.
>>>>
>>>> So let's say you create a derivative class "L" of your layout that
>>>> contains the image views.
>>>>
>>>> You could override
>>>> dispatchTouchEvent(MotionEvent)<http://developer.android.com/reference/android/view/ViewGroup.html#dispatchTouchEvent%28android.view.MotionEvent%29>of
>>>> L and check for the following motion event states:
>>>>
>>>> *1. Gesture started (ACTION_DOWN)*
>>>> Iterate your list of ImageView children of L and see if the touch event
>>>> point is in one of them. If yes, your gesture starts.
>>>>
>>>> The View class has the method getGlobalVisibleRect(Rect,
>>>> Point)<http://developer.android.com/reference/android/view/View.html#getGlobalVisibleRect(android.graphics.Rect,%20android.graphics.Point)>which
>>>> can be used for checking if your touch event coordinate hits one of
>>>> your image views. It would roughly look like the following (not tested
>>>> since I'm not sure if these methods return locations in screen or window
>>>> coordinate system, you may need to debug it):
>>>>
>>>> *Rect* r = new *Rect*();* *// should be class member you can reuse
>>>>> float x = motionEvent.getRawX();
>>>>> float y = motionEvent.getRawY();
>>>>>
>>>>> *for*(*ImageView* iv : imageViews) {
>>>>> iv.getGlobalVisibleRect(r);
>>>>>
>>>>> *if*(r.contains(x, y)) {
>>>>> // Touch event is inside image view
>>>>> }
>>>>> }
>>>>>
>>>>
>>>> *2. Gesture ongoing (ACTION_MOVE)*
>>>> If you visualize your gesture by drawing some trail or moving around
>>>> the first touched image view then this is the right point to do so. Here
>>>> you can update your view(s).
>>>>
>>>> *3. Gesture finished (ACTION_UP)*
>>>> Here you need to iterate your ImageView children again in order to see
>>>> if the finger has been lifted over another image view. In that case your
>>>> gesture was successful.
>>>>
>>>> *4. Gesture canceled (ACTION_CANCEL)*
>>>> Whatever your gesture is doing should be canceled here.
>>>>
>>>>
>>>> On Friday, August 23, 2013 1:21:59 AM UTC-5, OronS wrote:
>>>>>
>>>>> Hi there [image: :)]
>>>>>
>>>>> I have two ImageViews in my app.
>>>>> I've added a gesture detector (GestureOverlayView), and added gestures
>>>>> to the app by using android's sample, which record gestures and save them
>>>>> to a file, and I then load this file.
>>>>>
>>>>> My Goal is to limit the gestures area.. I want them to start from one
>>>>> ImageView, and end on the other.
>>>>> I didn't find anything on google!! : /
>>>>>
>>>>> I've added OnTouch listener to both images, but I don't know how to
>>>>> detect a gesture coming from the outside of a View.
>>>>>
>>>>> I can detect a gesture starts from one Image ("Down" event), but when
>>>>> my finger goes over the second and then go up, the event triggered is
>>>>> "Cancel" on the first image
>>>>>
>>>>> Please Help
>>>>>
>>>>> Thanks,
>>>>> Oron
>>>>>
>>>>
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