And indeed that was it!
In the MapPolyLine's MouseArea I just replaced "anchor.fill: parent"
with "containmentMask: polyline" and (luckily I think) it works without
any further calculations.
Thanks a lot for the tip.
Philippe.
Le 08-03-2019 08:18, maitai a écrit :
Thanks Shawn, that looks the best approach, I 'll give it a try.
Le 07-03-2019 20:29, Shawn Rutledge a écrit :
On 7 Mar 2019, at 18:32, maitai <mai...@virtual-winds.org> wrote:
Hi,
I need to trigger various actions whenever a MapPolyLine is hovered
or pressed, such as displaying a tooltip, a menu, etc.
I have put a MouseArea on it with anchors.fills: parent, but the
problem is that the mouse area does not represent the line, but the
polygon made by the line. For instance if you have a L shape, entered
event and so on is triggered when you enter the bounding rectangle of
the line, not when you hover over the line itself.
On a QGraphicsScene we had the shape() protected method for that
kinds of case, for instance with a QPainterPathStroker to give some
thickness to the line's "mousearea".
I will probably end with a custom property that will carry the pixel
distance between the line segments and the mouse coordinates, but
this is going to be heavy to compute (I have potentially hundreds of
complicated lines on the map).
Is there a better way or even better a standard way to do that?
Check out containmentMask: that’s how you can redefine the behavior of
MouseArea’s contains() method in QML.
You could use HoverHandler and/or TapHandler though, and then perhaps
set containmentMask on the polyline itself if behavior is still not
what you want (I haven’t tried it with MapPolyLine myself, only with
QtQuick.Shapes).
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