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bug#19988: 25.0.50; Drag events ending in different frame


From: Eli Zaretskii
Subject: bug#19988: 25.0.50; Drag events ending in different frame
Date: Thu, 05 Mar 2015 19:05:24 +0200

> From: Stefan Monnier <address@hidden>
> Cc: Eli Zaretskii <address@hidden>, address@hidden
> Date: Wed, 04 Mar 2015 17:58:46 -0500
> 
> > How do we include both in a backward-compatible way?
> 
> Good question.  Maybe we can return only one of the two and find a way
> to implement a function that computes the other from the one
> that's returned.

Yes, that would work.

> > When I select a region by dragging Mouse-1 starting at the "selected."
> > above, as soon as the mouse cursor leaves the emacs frame, the region
> > won't grow or shrink anymore until I enter the frame and window again.
> 
> Indeed, sorry.  Dragging keeps working when you drag a mode-line but not
> when you drag a region.  Not sure why.  Looks like a bug to me.

The code looks like it was explicitly programmed to do this.

> Actually, it's more subtle than that: if I move into another frame which
> hides part of the selected window, the drag keeps working (as long as
> I stay within the bounds of the originally selected window, even though
> I don't get to see some of those bounds because they're hidden by
> another frame).

This doesn't happen on my system.  Could be toolkit-specific.

> Oh, and there's yet another subtlety: if, during the drag, you move the
> mouse out of the selected frame, the drag seems to freeze indeed, but if
> you then move your mouse higher/lower than the frame the text gets
> scrolled and the drag does take place (even if you release the mouse
> while it's outside of the originally selected frame/window).

Yes, and that's expected, I think.





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