add delete layer action to PG data items

Author: brushtyler

src/providers/postgres/qgspostgresdataitems.cpp

@@ -8,6 +8,8 @@
 
 #include <QMessageBox>
 
+QGISEXTERN bool deleteLayer( const QString& uri, QString& errCause );
+
 // ---------------------------------------------------------------------------
 QgsPGConnectionItem::QgsPGConnectionItem( QgsDataItem* parent, QString name, QString path )
     : QgsDataCollectionItem( parent, name, path )
@@ -237,6 +239,32 @@ QgsPGLayerItem::~QgsPGLayerItem()
 {
 }
 
+QList<QAction*> QgsPGLayerItem::actions()
+{
+  QList<QAction*> lst;
+
+  QAction* actionDeleteLayer = new QAction( tr( "Delete layer" ), this );
+  connect( actionDeleteLayer, SIGNAL( triggered() ), this, SLOT( deleteLayer() ) );
+  lst.append( actionDeleteLayer );
+
+  return lst;
+}
+
+void QgsPGLayerItem::deleteLayer()
+{
+  QString errCause;
+  bool res = ::deleteLayer( mUri, errCause );
+  if ( !res )
+  {
+    QMessageBox::warning( 0, tr( "Delete layer" ), errCause );
+  }
+  else
+  {
+    QMessageBox::information( 0, tr( "Delete layer" ), tr( "Layer deleted successfully." ) );
+    mParent->refresh();
+  }
+}
+
 QString QgsPGLayerItem::createUri()
 {
   QString pkColName = mLayerProperty.pkCols.size() > 0 ? mLayerProperty.pkCols.at( 0 ) : QString::null;

src/providers/postgres/qgspostgresdataitems.h

@@ -83,6 +83,11 @@ class QgsPGLayerItem : public QgsLayerItem
 
     QString createUri();
 
+    virtual QList<QAction*> actions();
+
+  public slots:
+    void deleteLayer();
+
   private:
     QgsPostgresLayerProperty mLayerProperty;
 };