optionally add save vector file to canvas (fix #4598)

Author: jef-n

src/app/ogr/qgsvectorlayersaveasdialog.cpp

@@ -167,3 +167,8 @@ bool QgsVectorLayerSaveAsDialog::skipAttributeCreation() const
 {
   return mSkipAttributeCreation->isChecked();
 }
+
+bool QgsVectorLayerSaveAsDialog::addToCanvas() const
+{
+  return mAddToCanvas->isChecked();
+}

src/app/ogr/qgsvectorlayersaveasdialog.h

@@ -40,6 +40,7 @@ class QgsVectorLayerSaveAsDialog : public QDialog, private Ui::QgsVectorLayerSav
     QStringList layerOptions() const;
     long crs() const;
     bool skipAttributeCreation() const;
+    bool addToCanvas() const;
 
   private slots:
     void on_mFormatComboBox_currentIndexChanged( int idx );

src/app/qgisapp.cpp

@@ -3471,6 +3471,10 @@ void QgisApp::saveAsVectorFileGeneral( bool saveOnlySelection )
 
     if ( error == QgsVectorFileWriter::NoError )
     {
+      if ( dialog->addToCanvas() )
+      {
+        addVectorLayers( QStringList( vectorFilename ), encoding, "file" );
+      }
       QMessageBox::information( 0, tr( "Saving done" ), tr( "Export to vector file has been completed" ) );
     }
     else

src/ui/qgsvectorlayersaveasdialogbase.ui

@@ -143,6 +143,13 @@
         </property>
        </widget>
       </item>
+      <item row="3" column="0" colspan="2">
+       <widget class="QCheckBox" name="mAddToCanvas">
+        <property name="text">
+         <string>Add save file to map</string>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>