RFC: New KWin effect for notifications

[Martin Graesslin]

On Thursday, November 26, 2015 7:17:54 PM CET Marco Martin wrote:
> in brief the problem is:
> * there is a window at a given position, like 10,10
> * we want to move it to like 10, 20
> * the movement has to "look" animated.
> 
> now, if i understood correctly, actual animation of the window position
> should be avoided, so would need after the window position is changed, for
> kwin to keep rendering it at the old position and then animate it still
> translated to the actual final position?
> 
> what would kwin need to do to do this third point in the best/smootest way
> possible? (note this would be utterly useful for plasma tooltips as well)

It's not really difficult. We need an effect which gets hinted that on 
position change there should be a transition. For that probably one new X 
property/Wayland protocol is needed which gets evaluated when the window 
moves.

Cheers
Martin
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