I call grabPoint inside a loop. The resulting image window keeps moving?

[ctross]

Hey again,

Again, much gratitude for this amazing package.

I use imager in my own package, and I need to grab 4 points off of the same image. I then repeat the process for several images.

There is some weird behavior of the pop-up image window however. The first time the pop-up opens after calling grabPoint, everything is fine. The image opens up centered in the R console. However, for the next three times I need to grab points, the pop-up shows up in random locations. It is really time consuming to have to grab the pop-up window, center it again, then click to grab the point, and then have to repeat this process.

Digging through the code, I follow the grabPoint function, and see that it depends on select() inside the CImg.h file.

I think somewhere in there, it is programmed to move the screen location of each successive interactive window? Is there an option that could be set by imager, so that the window always opens in the same location?

If you could let me know of anyway to make this happen, even if it means I have to build from source, it would be a HUGE help to me!

Thanks in advance!

[ShotaOchi]

I skimmed the source code of CImg.
I don't think CImg does something to change location of pop-up image window.
Maybe the window system of OS does it.
Anyway your interest is not the origin of the change of location of pop-up image window.

I agree it's useful if we can specify location of pop-up image window.
We can move pop-up image window to specified location.
I will implement it within next week.

[ctross]

Fantastic news. Thanks for looking into this, and for adding the location specification. Let me know once you push any changes, and I'll check out the updated version.

Again, much thanks for taking the time to address these feature requests. I am very grateful for the help and for the great software!

[Sade154]

This would be really helpful. On my laptop (windows 10), I can't even see the image to grab (it appears in the windows taskbar but when I click on it, nothing happens and I have to close R.
The command used is: imager::grabRect(imager::boats) (with the latest version of imager, R and Rstudio).
Thank you very much for this very (very very) useful package.