Looking for something like

canvas.xyCoordinates.connect( self.canvasMoveEvent )

but that's from a 7 year old post so looks like xyCoordinates is not in QGIS 3.x


From: QGIS-Developer <qgis-developer-boun...@lists.osgeo.org> On Behalf Of 
Catania, Luke A ERDC-RDE-GRL-VA CIV via QGIS-Developer
Sent: Wednesday, April 5, 2023 11:53 AM
To: qgis-developer@lists.osgeo.org
Subject: Re: [QGIS-Developer] Detect a Map Canvas Mouse Event

I found


QgsMapToolEmitPoint , QgsMapTool and canvas.setMapTool(...)


So I declared my class as AoiSizeValidator(QgsMapToolEmitPoint)



But gave that a try and it gets me x,y, initially but when I select an add 
layer from the qgis edit menu, I guess it sets a new map tool so mine gets 
overridden.  So looks like I need a different approach to get xy from the map 
canvas.


From: QGIS-Developer 
<qgis-developer-boun...@lists.osgeo.org<mailto:qgis-developer-boun...@lists.osgeo.org>>
 On Behalf Of Catania, Luke A ERDC-RDE-GRL-VA CIV via QGIS-Developer
Sent: Wednesday, April 5, 2023 11:27 AM
To: qgis-developer@lists.osgeo.org<mailto:qgis-developer@lists.osgeo.org>
Subject: [QGIS-Developer] Detect a Map Canvas Mouse Event

Trying to get a map canvas event when canvas is clicked and mouse is dragged.  
I have code that creates an empty layer, but I use the QGIS edit menu to add 
the actually layer.  I want to be able to track the mouse movement so I can 
calculated the area of the feature being drawn in real time so I can make sure 
the area is within a defined range.

Is there an event I can connect to so I can run my custom code when the even 
occurs?
_______________________________________________
QGIS-Developer mailing list
QGIS-Developer@lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer

Reply via email to