Hi,
Sorry to come again with this stuff, but I am really puzzled.
I am wondering why I have a constant 9 pixels shift between
QCursor.pos().x()
and
mouseEvent.pos().x() + self.canvas.pos().x() +
self.iface.mainWindow().pos().x()
Can someone explain this to me?
Also I am still looking for a smart way to perform a snap with the
QgsMapTool...
Do you think it could be easily added as an option?
Thanks a lot,
Denis
On 02/06/2012 04:28 PM, Denis Rouzaud wrote:
Hi Nathan,
Thanks for your reply.
I am a little bit confused as I do not really know how to set the
mouse position. I have a solution, but it is not giving the same
experience as when you create a new feature in a layer:
I use the canvasMoveEvent, I get the point in pixels in the canvas using
result,snappingResults =
QgsMapCanvasSnapper(self.canvas).snapToBackgroundLayers(pixPoint,[])
The best I could do is calculating the difference in pixels:
self.transform = self.canvas.getCoordinateTransform()
snappedPoint = QgsPoint(snappingResults[0].snappedVertex)
startPoint =
self.transform.toMapCoordinates(pixPoint.x(),pixPoint.y())
dx =
(snappedPoint.x()-startPoint.x())/self.transform.mapUnitsPerPixel()
dy =
(snappedPoint.y()-startPoint.y())/self.transform.mapUnitsPerPixel()
And then setting the cursor by applying this difference:
qcur = QCursor.pos()
QCursor().setPos(qcur.x()+dx,qcur.y()-dy)
I am quite sure there is a smarter way, but I cannot find it!
Also the problem is that the mouse is oscillating using this method.
The only reason I can give is that canvasMoveEvent is sent again
before the previously called method has returning, could it be true?
I am a little bit lost in this. I would really appreciate your help!
Thanks again,
Denis
On 02/03/2012 07:37 AM, Nathan Woodrow wrote:
Hey Denis,
The QCursor setPos
<http://developer.qt.nokia.com/doc/qt-4.8/qcursor.html#setPos>methods
are static so you shouldn't need to get access to the instance to
move the cursor position.
*
*
*- Nathan
*
On Fri, Feb 3, 2012 at 4:07 PM, Denis Rouzaud
<[email protected] <mailto:[email protected]>> wrote:
Is there anyway to access the QCursor within QgsMapToolEmitPoint.
I see there is a mCursor, but it's protected.
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