Zooming and panning TextureView

1
votes

I tried many examples of how to zoom and pan Views. All they work with different views, imageViews. However I could not find any solution for panning zoomed TextureView. Is there anyone who implemented that feature?

1
androidzoomingpantextureview
TextureView#setTransform(Matrix transform) – pskink
@pskink It is only for zooming not panning – Shuhrat Akramov
no, it is for everything a Matrix supports – pskink
Yes. It really works like that. Thanks – Shuhrat Akramov

1 Answers

2
votes

In simple views like ImageView in many implementations canvas is used. Instead of canvas in views whose onDraw() method is final use Matrix. Example:

On ImageView: 

 canvas.translate(x, y);
 canvas.scale(mScaleFactor, mScaleFactor);

On TextureView:

 matrix.postTranslate(x, y);
 matrix.postScale(mScaleFactor, mScaleFactor);

Example in github: link