More general control over application window on Desktop.

[brunoga]

Support for setting windows to fullscreen and setting the geometry of a (running) window has been added which is great. But it seems there is still not a lot of control from a developer perspective over an app window so some things I would like to do seem either not possible or very complicated (but maybe I am missing something). Here is a description of what I want to do:

1 - My app has a main window that would basically be used to display a video feed.
2 - I would like for this window to have a fixed size (1280x720, which is the video size) and be non-resizable. It should ideally always start centered on the screen.
3 - The window should not have any of the default widgets (like the nav bar) added to it.
4 - The content should match the window size so no scrollbar is expected.
5 - I want to be able to go in and out of fullscreen at will.

I think the main difficulty I have is with 2. I can only set the geometry/position of a running window so there might be some jank (for now, I am hacking it to resize the window with a goroutine that has to wait for some time before using SetGeometry) where the Window starts and then is resized. I think this is mostly because Core gives preference to the saved window state and although I thing this is a good idea, I think this behavior should be possible to override.

Thoughts?

[kkoreilly]

@brunoga Thank you for asking about this. We can add a SetSaveGeometry(false) function on Stage to allow you to disable the saved window geometry.

For your other points, everything should be easily possible in the current system. Some pointers in case they are helpful:

For 2, you can call SetResizable(false) on the Stage to disable window resizing. You can use s.Min on your video widget Styler to set the size, and then you can do s.Padding.Zero() on your b.Scene Styler to get rid of the default padding.
For 3, there are no more default widgets with the latest version, and you can remove the padding as mentioned.
For 4, there should be no scrollbar rendered with the aforementioned settings.
For 5, you can update fullscreen status using b.Scene.SetFullscreen.

Everything you want to do should be possible after I add the SetSaveGeometry function soon. Please let me know if you have any other questions or issues; I can give clearer code samples if necessary, and I will add website documentation for these things soon.