Fix an instance where the status bar coordinates are incorrectly tran…

…sformed

This can happen immediately after a project CRS change, as the last
mouse coordinates are incorrectly considered to be in the new
project CRS.

src/app/qgsstatusbarcoordinateswidget.cpp

@@ -374,6 +374,7 @@ void QgsStatusBarCoordinatesWidget::refreshMapCanvas()
 void QgsStatusBarCoordinatesWidget::showMouseCoordinates( const QgsPointXY &p )
 {
   mLastCoordinate = p;
+  mLastCoordinateCrs = mMapCanvas->mapSettings().destinationCrs();
   updateCoordinateDisplay();
 }
 
@@ -431,7 +432,7 @@ void QgsStatusBarCoordinatesWidget::updateCoordinateDisplay()
   if ( mLastCoordinate.isEmpty() )
     mLineEdit->clear();
   else
-    mLineEdit->setText( QgsCoordinateUtils::formatCoordinateForProject( QgsProject::instance(), mLastCoordinate, mMapCanvas->mapSettings().destinationCrs(), static_cast<int>( mMousePrecisionDecimalPlaces ) ) );
+    mLineEdit->setText( QgsCoordinateUtils::formatCoordinateForProject( QgsProject::instance(), mLastCoordinate, mLastCoordinateCrs, static_cast<int>( mMousePrecisionDecimalPlaces ) ) );
 
   ensureCoordinatesVisible();
 }

src/app/qgsstatusbarcoordinateswidget.h

@@ -28,6 +28,7 @@ class QgsMapCanvas;
 
 #include "qgis_app.h"
 #include "qgspointxy.h"
+#include "qgscoordinatereferencesystem.h"
 
 #include <QWidget>
 #include <QElapsedTimer>
@@ -87,6 +88,7 @@ class APP_EXPORT QgsStatusBarCoordinatesWidget : public QWidget
     unsigned int mMousePrecisionDecimalPlaces;
 
     QgsPointXY mLastCoordinate;
+    QgsCoordinateReferenceSystem mLastCoordinateCrs;
 
     bool mIsFirstSizeChange = true;
     QElapsedTimer mLastSizeChangeTimer;