getter for the output crs in QgsExtentGroupBox

Author: Gustry

python/gui/qgsextentgroupbox.sip

@@ -103,9 +103,18 @@ class QgsExtentGroupBox : QgsCollapsibleGroupBox
     QgsRectangle outputExtent() const;
 %Docstring
  Returns the extent shown in the widget - in output CRS coordinates.
+.. seealso:: :py:func:`outputCrs`
  :rtype: QgsRectangle
 %End
 
+    QgsCoordinateReferenceSystem outputCrs() const;
+%Docstring
+ Returns the current output CRS, used in the display.
+.. seealso:: :py:func:`outputExtent`
+.. versionadded:: 3.0
+ :rtype: QgsCoordinateReferenceSystem
+%End
+
     QgsExtentGroupBox::ExtentState extentState() const;
 %Docstring
  Returns the currently selected state for the widget's extent.

src/gui/qgsextentgroupbox.h

@@ -120,9 +120,17 @@ class GUI_EXPORT QgsExtentGroupBox : public QgsCollapsibleGroupBox, private Ui::
 
     /**
      * Returns the extent shown in the widget - in output CRS coordinates.
+     * \see outputCrs
      */
     QgsRectangle outputExtent() const;
 
+    /**
+     * Returns the current output CRS, used in the display.
+     * \see outputExtent
+     * \since QGIS 3.0
+     */
+    QgsCoordinateReferenceSystem outputCrs() const { return mOutputCrs; }
+
     /**
      * Returns the currently selected state for the widget's extent.
      */