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Dear Heyb6,

Thank you for contacting us and your question.

If I understand well, you would like to be able to pinch with 2 fingers, to zoom in and zoom out?

You would also like to be able to scroll a page?

In order to detect pinch gestures, you could use the ScaleGestureDetector.

In particular, you could override the onScale function, and use the scaleFactor to zoomin or zoomout.

Once you have this factor, you can use the "zoom" function of the renderer: https://developer.myscript.com/refguides/interactive-ink/android/2.0/com/myscript/iink/Renderer.html#zoom(float)

You can also refer to the Demo sample we provide, in particular the zoomIn and zoomOut functions of the PartEditor.kt
fun zoomIn() {
editor?.renderer?.zoom(110.0f / 100.0f)
}

fun zoomOut() {
editor?.renderer?.zoom(100.0f / 110.0f)
}

Regarding the scroll, you can refer to the onScroll function of the iink\examples\android\UIReferenceImplementation\src\main\java\com\myscript\iink\uireferenceimplementation\InputController.java file

@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY)
{
if (editor.isScrollAllowed())
{
Point oldOffset = editor.getRenderer().getViewOffset();
Point newOffset = new Point(oldOffset.x + distanceX, oldOffset.y + distanceY);
editor.clampViewOffset(newOffset);
editor.getRenderer().setViewOffset(Math.round(newOffset.x), Math.round(newOffset.y));
renderTarget.invalidate(editor.getRenderer(), EnumSet.allOf(IRenderTarget.LayerType.class));
if(_viewListener != null)
{
_viewListener.showScrollbars();
}
return true;
}
return false;
}

Let us know if this helps.

Best regards,

Olivier

Dear Heyb,

I am not sure to completely understand: did you try using the getPointerCount function of the MotionEvent class?

For example, when 2 fingers  are touching the screen in touch mode, you use the scalefactor to zoom? And when only 1 finger in touchmode, you scroll?

Or I may have missed something?

Best regards,

Olivier

Dear Heyb,

currently, I am not sure to understand the difficulties you are facing. What do you mean by it doesn't work when changing the mode? Which error do you have?

On my side, I updated the InputController.java, which you can find attached.

Playing with it, I was able to zoom in with 2 fingers.

Please note this is a quick sample, and of course shall be reworked. But it can provide with guidelines how to start.

Let me know if this helps.

Best regards,

Olivier

Dear Heyb,

please find the InputController.java file at the following link: https://myscript.filecamp.com/s/7e8p7dDVXKgbtbIc/d

Let me know if it helps.

Best regards,

Olivier