derivate or use directly an instance of:
http://qgis.org/api/classQgsMapToolEmitPoint.html
every mapTool has methods to convert pixel coordinates in map (OTF) or
layer coordinates.
or
if you want to piggyback qgis editing, attach the editing signal of
the QgsVectorLayer or that of the QgsVector
Hi all,
I'm writing a plugin and i would like to get the first (starting point) vertex
of a line vector feature during editing.
The steps are:
1) enable a line vector to be editable
2)click on add feature button
3)When i click on mapcanvas to draw my first point, i would like to get the
point an
