Moving mpv window in a consecutive manner triggers MBTN_LEFT_DBL

[Sneakpeakcss]

Important Information

Provide following Information:

• mpv version: mpv-x86_64-v3-20240104-git-448cb4d
• Windows Version: WIN10 22H2
• Source of the mpv binary: zhongfly
• If known which version of mpv introduced the problem
• GPU model, driver and version: RX570 Adrenalin 23.11.1
• Possible screenshot or video of visual glitches:

mpv.doubleclick.window.drag.mp4

Reproduction steps

• Drag the window for a short distance, release and drag again.

Expected behavior

Second mouse press that falls under input-doubleclick-time shouldn't trigger after the mpv window was moved.

Actual behavior

Second click triggers MBTN_LEFT_DBL after trying to quickly move window in a consecutive manner.

Log file

mpvlog.txt

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In a way this seems like an extension of #13003 (?) @na-na-hi, and is probably the last problematic behaviour when it comes to window dragging issues after #12214, #1921 were fixed.

[na-na-hi]

This issue also exists on X11. From the look at the input handling logic, it should also exist on all other platforms.

This needs to be fixed separately for all platforms to detect whether the window has been moved by dragging, since the input system isn't aware of the global mouse position.

Basically what was said in #7563 (comment) needs to be done, and both this issue and #7563 will be solved.