[Interest] QtLocation MapPolyLine and MouseArea
maitai at virtual-winds.org
Fri Mar 8 11:29:54 CET 2019
Yes with anchors.fill:parent, Pressed/Released works only if the mouse
is exactly on the line, while hover seems to use the bounding rect of
But anyway with containmentMask: polyline, all is OK and hover occurs
only exactly on the line.
The only thing one could hope for is a possibility to make the mouse
area a bit thicker than the line width, because with thin lines it is
difficult to be exactly on it.
Le 08-03-2019 11:07, Paolo Angelelli a écrit :
> Pressed/released should work as expected, shouldn't it?
> Hovered is a different story though.
> On Thu, 07 Mar 2019 18:32:35 +0100
> maitai <maitai at virtual-winds.org> wrote:
>> 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
>> is that the mouse area does not represent the line, but the polygon
>> by the line. For instance if you have a L shape, entered event and so
>> is triggered when you enter the bounding rectangle of the line, not
>> 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
>> 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?
>> Philippe Lelong
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>> Interest at qt-project.org
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