Under wxGTK, wxGauge was returning fixed values for height and width.
This meant that the gauge would not center correctly in a sizer,
particularly under GTK+ 3 where the default gauge height is just a few
pixels.
Following this change, wxGauge renders correctly on GTK+ 3 and matches
the reference widget display in the gtk3-widget-factory app.
Note, this change will also result in a slimmer widget on GTK+ 2, but
the gauge height can be forced using wxGauge::SetMinSize() on the older
toolkit.
The gauge presentation is totally theme dependent under GTK+ 3. For
example, the user can have thicker gauges by setting the following in
their ~/.config/gtk-3.0/gtk.css file:
progress, trough {
min-height: 20px;
}
Closes https://github.com/wxWidgets/wxWidgets/pull/1353
7c7c717389