Add Multiple Windows Demo

[Visssarion]

A demo showing all Window classes and their use within the main window.

Preview:

[Visssarion]

Thanks @AThousandShips , your fixes of GDScript style has been commited.

[Visssarion]

Noooooo there is more dialogue that i missed? ;-; Will look into it

[Calinou]

Looks great so far!

I wonder if this demo should be used to showcase tray icons, or whether we should use the existing Operating System Testing demo for that instead.

[Visssarion]

Looks great so far!

I wonder if this demo should be used to showcase tray icons, or whether we should use the existing Operating System Testing demo for that instead.

StatusIndicator is a separate class from OS, so I feel fine with adding it to this demo. Although that feature only working on Windows and MacOS does make it an OS specific thing.

Will make a commit later with adding tray functionality to this demo.

[Visssarion]

Status Indicator Added to Demo

[Visssarion]

9 Commits were squashed into 1

[Visssarion]

Fixed Draggable Window not receiving input when cursor doesn't overlap window.

[aaronfranke]

Looks pretty good! I think this demo is plenty sufficiently complex to justify it being separate from the OS testing demo.

Can you update this to Godot 4.5? It wouldn't be hard for others to do it but we will need to do it eventually.

[Visssarion]

While i was migrating to 4.5 fixed a bug with FIleDialog not opening up

[Visssarion]

Commits squashed! I'm pretty excited! 🎊
Also I committed all the code review changes, squashing the commits deleted that info from the GitHub logs

[aaronfranke]

When I try to drag an embedded subwindow, the rate does not match my cursor speed on my 200% scaled high-DPI screen:

subwindow.mp4

[Visssarion]

When I try to drag an embedded subwindow, the rate does not match my cursor speed on my 200% scaled high-DPI screen:
subwindow.mp4

I honestly am not sure how to fix this problem? It seems that DisplayServer.mouse_get_position() returns an incorrect value for this under hugh-DPI. It also seems that the value is multiplied by scale, starting not from the (0, 0) of the window, but from the beginning of the mouse click. However, its not a variable that is saved in my code, so I am inclined to thing that something weird is happening in DisplayServer.mouse_get_position()

[deralmas]

I think that a better approach would be to use the new-ish Window.start_drag method, which asks the OS to start a drag directly :D

This should take care of everything and is also a requirement for Wayland dragging as it does not support window warping.

[Visssarion]

Done! Did not know that function got added in 4.4

[aaronfranke]

Weird, I think this was working before, but now when I uncheck "Embed Subwindows" on macOS, Godot half-freezes. Somehow I can click on text boxes, but not any other buttons. Also, right-clicking in a text box produces these errors:

I'm using Godot 4.5-stable on macOS.

Also, please update the project to Godot 4.5, there are diffs when opening because the project file says Godot 4.2.