Create boundary for panning the image

[pushpulldecoder]

Create a boundary around the image for panning so that panning stops beyond the image boundary.

[WaAlvis]

I would like to work on this, as my first open source contribution!!

[pushpulldecoder]

Assigned

[pushpulldecoder]

Any progress?

[pushpulldecoder]

Due to no progress, I'm unassigning this issue