#2240 Zoombox doesn't appear with wxterm under GTK3

[Scott Talbert]

When using gnuplot-wx 5.2.8 build with GTK3, the zoombox doesn't seem to be drawn. Steps to reproduce:

1. Run gnuplot-wx
2. plot sin(x)
3. Right drag on window
4. Box doesn't appear

This might be because wxINVERT is not supported under wxGTK3. See:
https://github.com/wxWidgets/wxWidgets/blob/master/interface/wx/dc.h#L1517

[Ethan Merritt]

How annoying.
Well there's already a work-around in the code for use with Mac+Cocoa+wx2.9.
We can use it for gtk3 also.

[Scott Talbert]

I tested with 0d93b4c5c3a365d5278d7d930634b7ecc1c36cc0 on a gtk3 build. Unfortunately, it doesn't seem to resolve the problem.

[Ethan Merritt]

I was able to reproduce the problem with a gtk3 build here, and confirmed the fix.
The machine used for testing has
libwx_gtk3u_core-3.0.so.0
libwebkit2gtk-4.0.so.37 (not sure this is relevant)

Do you have a different version?

[Scott Talbert]

Okay, my bad. I completely failed to apply the patch properly. Sorry about that.

Now that I've done so, the zoom box is now visible when using X11, but unfortunately not when using Wayland.

[Ethan Merritt]

Wayland issues are way outside my area of knowledge.