I set about implementing a type that allows a user to set the window
mask (aka wayland input region, i.e. non-rectangular windows) from QML.
I ended up with a qml Item that works like this:
|Window|
|{
|
| WaylandInputRegion {|
| item: theMenu
|
| }|
| Rectangle {|
| id: theMenu|
| radius:50|
| //etc pp
|
| }
|
|}|
|
|
behind the scenes it uses grabToImage, then QBitMap::fromImage,
QRegion(QBitmap&) and finally window()->handle()->setMask()
I also added a fast path for when item is null to use the
WaylandInputRegion itself as a simple rectangular region.
However, the current implementation has the following issues that I
would appreciate input for:
using an external item as the bitmap source requires us to track changes
in that item including its scene position to correctly reflect that in
the window mask.
I haven't found a way to do that so I rely on explicit calls to
updateRegion() from qml code at known points when animations stop.
Also for items anchored to the windows contentItem, position is invalid
as the contentItem geometry appears to be 0x0, 0,0 for some time after
start.
Florian
--
Florian Hänel
Geschäftsführer
echtzeit.solutions GmbH
Handelsregistergericht München HRB 231056
Ust-ID DE310379807
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