Openseadragon: image coordinate to viewport coordinate.

[sumitkulkarni23]

I am using Openseadragon to view a image of size 15000, 10000. My view size is 800, 600.
I want to draw a rectangle at location 1500, 1200.
I am converting my pixel co-ordinates to view port coordinates using API - imageToViewportRectangle.
But it doesn't work. I tried normalizing my pixel coordinates by deriving factor of 800/15000 and 600/10000 as well. I multiply this factor to 1500, 1200 and pass those to API.

None of the approach works and it returns the same values all the time.
Please suggest if I am missing something.

Thanks & Regards
Sumit

[sumitkulkarni23]

I found the answer the hard way ... the API works (without any normalization) but only when I use it from a button click!
i think I was trying to create the shapes before the viewport is completely getting loaded. Now I am looking for event which will tell me if the viewer and viewport are ready for a conversion.

Should we keep the issue open till we get that answer ? Not sure ...

[avandecreme]

Listening to the open event should be enough.
If not, you can use the new fully-loaded-change event added in #837 but it is only available on the master branch at the moment.

[sumitkulkarni23]

Thanks for the answer....