Option to freeze screen while using area select

[stijndcl]

Problem

In some cases it can be desirable to have the background freeze while drawing the area to take the screenshot from. Examples can include things that are moving/animated, something that could (potentially) vanish while you're drawing the area (like a notification that only lasts for a couple of seconds), frames from videos, ...

If the background would freeze up when entering area select mode, you would get a view of the exact screenshot you're going to take while drawing the rectangle, and you could potentially take time to make the area a bit cleaner instead of having to very quickly draw something before it's too late.

Essentially, this takes a snapshot of what your screen looks like when pressing the hotkey (complete screenshot), displays that, and lets you select an area from that instead of from the live background.

Proposal

A setting in the app that can be toggled on/off, off by default so people that are used to the current system don't have to notice the change.

Prior Art (Optional)

• Flameshot's area select
• KDE Spectacle
• Windows 10 snipping tool (win + shift + s)