Add drag and drop for QLR files. Fix #10005

Author: NathanW2

src/app/qgisapp.cpp

@@ -2462,10 +2462,10 @@ void QgisApp::addLayerDefinition()
   if ( path.isEmpty() )
     return;
 
-  QList<QgsMapLayer*> layers = QgsMapLayer::fromLayerDefinitionFile( path );
-  QgsMapLayerRegistry::instance()->addMapLayers( layers );
+  openLayerDefinition( path );
 }
 
+
 /**
   This method prompts the user for a list of vector file names  with a dialog.
   */
@@ -3806,6 +3806,12 @@ void QgisApp::dxfExport()
   }
 }
 
+void QgisApp::openLayerDefinition( const QString & path )
+{
+  QList<QgsMapLayer*> layers = QgsMapLayer::fromLayerDefinitionFile( path );
+  QgsMapLayerRegistry::instance()->addMapLayers( layers );
+}
+
 // Open the project file corresponding to the
 // path at the given index in mRecentProjectPaths
 void QgisApp::openProject( QAction *action )
@@ -3914,6 +3920,10 @@ void QgisApp::openFile( const QString & fileName )
     QgsDebugMsg( "Opening project " + fileName );
     openProject( fileName );
   }
+  else if ( fi.completeSuffix() == "qlr" )
+  {
+    openLayerDefinition( fileName );
+  }
   else
   {
     QgsDebugMsg( "Adding " + fileName + " to the map canvas" );

src/app/qgisapp.h

@@ -164,6 +164,8 @@ class APP_EXPORT QgisApp : public QMainWindow, private Ui::MainWindow
       Used to process a commandline argument, FileOpen or Drop event.
       */
     void openProject( const QString & fileName );
+
+    void openLayerDefinition( const QString & filename );
     /** opens a qgis project file
       @returns false if unable to open the project
       */