#249 Export to Image in Plot Window generates message, "GtkDialog mapped without a transient parent. This is discouraged."

[Allan Macdonald]

Steps to reproduce:
1. Plot using terminal type qt
2. In plot window that pops up, select Export to Image
3. The following message appears in the terminal session running gnuplot, "GtkDialog mapped without a transient parent. This is discouraged."

version: gnuplot 5.2 patchlevel 2
OS:
Ubuntu 18.04.4 LTS
gnome 3.28.2
uname -a
Linux Dell-Ubuntu 4.15.0-88-generic #88-Ubuntu SMP Tue Feb 11 20:11:34 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

The attached gnuplot script demonstrates this error.

[Allan Macdonald]

Bump: this is still happening.

[Ethan Merritt]

Some googling on the warning message suggests that this is a harmless message generated by gnome shell, not anything specific to gnuplot. In any case I cannot reproduce it here. Note that since gnuplot is using the Qt terminal it should be using the Qt toolkit widgets, not the Gtk widgets. This is a hint that a message from GtkDialog is not coming from gnuplot.

[Allan Macdonald]

This seems to be no longer occurring after upgrading to 20.04LTS.