Hi Nathan, I just noticed the recent addition of UI themes / Night Mapping and
how Qt stylesheets are used to implement it. This is a great idea, but there
are a few things to be careful of. In particular, changing the theme to Night
Mapping is OK, but changing back to 'default' causes QGis to crash, due to the
stylesheet file referenced not existing. And the Style setting in options shows
blank on first use of the new theme. Clicking OK on the Options (and possibly
other actions) causes the WindowsVista (on my computer) style to be use on
subsequent QGIS start. I had recently begun to try using stylesheets to set
things, such as icon size, and have found some issues: + setting an invalid
stylesheet may cause QGIS crash (when setting style after the stylesheet -- not
a common practice, or even setting a defective stylesheet), so don't set
something like 'file:///style.qss' if the file doesn't exist. + setting a
stylesheet on application object hinders recovery of the style name as used in
the Options dialog; probably should track the style as a text value and not
recover from the style object. + using a stylesheet on the application object
to set icon size, for example, seems a better idea to me than to program a
specific set of controls to get the size as is done now. + in spite of Qt docs
noting that setting style after QApplication object creation isn't recommended,
I have done so successfully, except when there is a defective stylesheet
present. + presently, the font and certain other settings applied by stylesheet
are on the main window so only child windows get the styling. The stylesheet
really should be set on the application so all windows of the app get the
styling. + any stylesheet settings applied directly need to be integrated with
any additional settings from a file. I not sure how to do both direct settings
and include a file, too, at the present time. I am not well Internet connected
right now, so it may be a while before I respond to any replies. Steven Mizuno
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