[QGIS-Developer] Detect a Map Canvas Mouse Event

[Catania, Luke A ERDC-RDE-GRL-VA CIV]

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-bounces at 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 at 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-bounces at lists.osgeo.org<mailto:qgis-developer-bounces at 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 at lists.osgeo.org<mailto:qgis-developer at 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?
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