Can't draw if dragging finger horizontally about drawableview

[PaNaVTEC]

I'm trying to reproduce, but I can't do it. I'm trying with a Nexus 7, Nexus 6 and an LG G2. I setted the sample to use this configuration. Do you know that dragging with 2 fingers is to move the canvas and dragging with one finger is for painting? I'm trying to play with both configurations and I can't reproduce. Can you show me the Layout XML/activity what are you using? I'm really interested in catch this bug.

Edit: are you drawing with one finger and later using a second one? if you are doing this I can see that the line paints and later disappears from the screen

[Odaym]

Here you will find a small video showing the bug: https://dl.dropboxusercontent.com/u/19390574/drawableView_horizontal.mp4

And here's my XML of that view, this is all a fragment that's sitting in a view pager. The config is set to the drawableView inside the onCreateView() method of the Fragment

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/bookmarkIMG"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" />

    <me.panavtec.drawableview.DrawableView
        android:id="@+id/drawable_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <ProgressBar/>

    <RelativeLayout>

        <TextView/>

        <TextView/>

        <TextView />

        <TextView/>

    </RelativeLayout>

    <ImageButton/>

</RelativeLayout>

[PaNaVTEC]

Ah man! That's the problem you are using a ViewPager so your View Hierarchy is consuming the horizontal event before the view catches it. To solve this, use a custom wrapper for your DrawableView, you can face the same problem if you use a HorizontalScrollView inside a ViewPager or some other component that uses horizontal touches. Here is a solution, make a new class that extends from the DrawableView and override the "dispatchTouchEvent" in this way:

@Override public boolean dispatchTouchEvent(MotionEvent event) {
    if (event.getAction() == MotionEvent.ACTION_MOVE && getParent() != null) {
      getParent().requestDisallowInterceptTouchEvent(true);
    }
    return super.dispatchTouchEvent(event);
  }

And in your fragment XML use your new class. Tell me if it works.

[Odaym]

Makes sense, that's what I noticed too when I just finished recording the video but didn't act upon it. To avoid UX confusion Im not going to try and solve this because this is not the only problem that will arise from having both enabled at the same time (scrolling and drawing). I will make the drawable view in a non-moving way over the view pager and then the view pager can be returned to when the drawing is over, much clearer way.

Thanks for helping so far though :)

[PaNaVTEC]

You're welcome! for any doubts / requests tell me :)