[QGIS-Developer] Rotating selected features programmatically

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

def rotateFeature(self):
        """Find the rotate feature action in QGIS toolbar and trigger it so the user can rotate the element.
        """

        # We want to detect when the rotation is complete with a geometryChanged signal so we can commit the changes and
        # end the edit session.
        self.vector_layer.editBuffer().geometryChanged.connect(self.element_layer_rotated)

        # Get all actions so we can search for the mActionRotateFeature action.
        actions = iface.mainWindow().findChildren(QAction)
        action = [x for x in actions if x.objectName()=='mActionRotateFeature'][0]

        expression = '"Element_Nb" = '
        expression = expression + "\'" + f'{self.element_number}' + "\'"
        QgsMessageLog.logMessage(f"expression: {expression}", "StandoffLayers", Qgis.Info)

        processing.run("qgis:selectbyexpression",
                       {'INPUT':self.vector_layer,
                        'EXPRESSION': expression,
                        'METHOD':0
                        }
        )
        # Inititates rotate feature action allowing to select a snap to value.
        action.trigger()

        QgsMessageLog.logMessage(f"Rotate Feature Action Triggered", "ElementPlacementTool", Qgis.Info)

def element_layer_rotated(self):
        """When the rotate action is triggered it seems to ignore the ElementPlacementTool events, so in order to end the edit session
        we need to detect a geometryChanged event after the rotation is complete.
        """
        QgsMessageLog.logMessage(f"Element Layer Rotated: {self.vector_layer.name()}", "ElementPlacementTool", Qgis.Info)

        # Disconnect from the signal so we can just commit the changes.
        self.vector_layer.editBuffer().geometryChanged.disconnect()

        # Save changes and end edit mode
        self.vector_layer.commitChanges()
        self.vector_layer.endEditCommand()
        self.deactivate()

From: Jacky Volpes <jacky.volpes at oslandia.com>
Sent: Thursday, August 1, 2024 8:26 AM
To: Catania, Luke A ERDC-RDE-GRL-VA CIV <Luke.A.Catania at erdc.dren.mil>; 'qgis-developer' <qgis-developer at lists.osgeo.org>
Subject: Re: [QGIS-Developer] Rotating selected features programmatically

Hi Luke,

Please provide a PyQGIS code snippet to reproduce. It will be more convenient to comment and suggest modifications.
Thanks,


--

Jacky Volpes



Ingénieur développeur SIG - Oslandia

Le 26/07/2024 à 22:06, Catania, Luke A ERDC-RDE-GRL-VA CIV via QGIS-Developer a écrit :
I am using the select by expression tool through python to select my features and then I trigger rotation through python I see both selected features rotating, but when I click to end the rotation, it only rotated one of the features and left the other one as is.  If I do this through the QGIS using the selection by expression in the selection toolbar and the rotate in the advanced digitizing tool bar rotating both features works fine.

Any Ideas?

Luke



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