Some applications have "nested windows". E.g. Virtualbox, freerdp/vinagre, vnc etc. In these cases it would be nice if alt+drag behaviour did move the "nested" window.
I propose that xfwm4 gets more settings, to allow, setting some processes as "blacklisted" for the alt+drag behaviour. Then virtualbox/vinagre can be blacklisted to allow passing through the alt+drag events through to the nested child windows.
One implementation of this feature for win32 can be seen at https://stefansundin.github.io/altdrag/ .
xfwm4 doesn't have per-client configuration, this is something fvwm/fvwm2 was doing like 20+ years ago and not something I would want to add in xfwm4.
OK. I agree that maintaining per-client settings is a hassle and some extra complexity, even if it's the user's own responsibility.
Do you think there is any other way to achieve this kind of behavior without needing per-client configuration?
Maybe some kind of x11 window hint? or an environment variable for the target process? or a workaround - allow e.g. shift+meta+alt-drag is transformed into alt-drag on the target window? did this kind of feature ever work with MDI-style applications? (was such a thing ever popular on x11?)
Yes, best would be to have some sort of property from the client. But I am not sure this is something that would be widely accepted...
GNOME would probably benefit from the same, as it uses similar modifier+click shortcuts for manipulating windows.
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