MythUI has problems with windows that are hidden

[paulh]

The best place to see this is the new Setup Wizard using any theme that is using the default theme version of the wizard (currently all the official themes I believe). Click next a couple of times an then previous to return to the previous page in the wizard. The result is a blank screen. You can still blindly operate the widgets on the screen you just can't see any of them. It's as though the background has been drawn over the top of them.

Something else to note is you only see this if the window is a full screen window, reduce the size of the window by a pixel then the background doesn't get drawn and everything then works as expected.

[stuartm]

Show/Hide? weren't really intended for use with windows, but the problem here seems to be that Show() is called too late in the destructors so it's not a mythui bug. The code even acknowledges that the pointers to m_generalScreen and m_audioScreen might not be valid at that stage otherwise there would be no need for the null pointer checks.

If it was me I'd get rid of those show/hide calls completely but Robert tells me that would spoil his theme. Anyway, I didn't write this, it's not a mythui bug and so I'm unassigning it from myself.

[Github]

Implement a Close() in setup wizard, and show previous windows there.

Refs #9938.

Branch: master Changeset: c4b12f62af5614b00a8b5035ac8592203711c001

[paulh]

Definitely not fixed.

This is fun lets all do it again. Beirdo your turn.

[paulh]

Use the screen stack rather than manually showing/hiding screens

[Github]

Setup Wizard: Fix the blank screens when moving back in the wizard.

Fixes #9938.

Branch: master Changeset: ae288e2a1c411d1d671298f627fa763016db8223