B4J Question How to Zoom an ImageView in ScrollPane Following the Mouse Cursor

[xulihang]

Here is the expected behavior.
Before zoom:

After zoom:

I am trying to do this by adjusting the HPosition and VPosition of the ScrollPane by calculating the coordinates in percentage of the mouse cursor in the ImageView. but it is a bit jumpy. Sample project attached.

 

[PaulMeuris]

There is a very good alternative: ZoomImageView
Using the scroll wheel will zoom in or out at the location of the cursor on the image.

    ZoomImageView1.ImageView.SetBitmap(fx.LoadImage(File.DirAssets,"angelfish.jpg"))

 

[xulihang]

ZoomImageView works great but it is directly updating the ImageView's top and left, not suitable for my case using scrollpane.