Add create/remove methods to raster provider baseclass

Author: mhugent

src/core/qgsrasterdataprovider.cpp

@@ -185,6 +185,16 @@ QString QgsRasterDataProvider::capabilitiesString() const
     abilitiesList += tr( "Build Pyramids" );
   }
 
+  if ( abilities & QgsRasterDataProvider::Create )
+  {
+    abilitiesList += tr( "Create Datasources" );
+  }
+
+  if ( abilities & QgsRasterDataProvider::Remove )
+  {
+    abilitiesList += tr( "Remove Datasources" );
+  }
+
   QgsDebugMsg( "Capability: " + abilitiesList.join( ", " ) );
 
   return abilitiesList.join( ", " );

src/core/qgsrasterdataprovider.h

@@ -64,7 +64,9 @@ class CORE_EXPORT QgsRasterDataProvider : public QgsDataProvider, public QgsRast
       EstimatedMinimumMaximum = 1 << 3,
       BuildPyramids =           1 << 4,
       Histogram =               1 << 5,
-      Size =                    1 << 6  // has fixed source type
+      Size =                    1 << 6,  // has fixed source type
+      Create =                  1 << 7, //create new datasets
+      Remove =                  1 << 8 //delete datasets
     };
 
     // This is modified copy of GDALColorInterp
@@ -433,6 +435,24 @@ class CORE_EXPORT QgsRasterDataProvider : public QgsDataProvider, public QgsRast
     /** Current time stamp of data source */
     virtual QDateTime dataTimestamp() const { return QDateTime(); }
 
+    /** Creates a new dataset with mDataSourceURI
+        @return true in case of success*/
+    virtual bool create( const QString& format, int nBands,
+                         QgsRasterDataProvider::DataType type, int width, int height, double* geoTransform,
+                         const QgsCoordinateReferenceSystem& crs /*e.v. color table*/ )
+    {
+      Q_UNUSED( format );
+      Q_UNUSED( nBands );
+      Q_UNUSED( type );
+      Q_UNUSED( width );
+      Q_UNUSED( height );
+      Q_UNUSED( geoTransform );
+      Q_UNUSED( crs ); return false;
+    }
+
+    /** Remove dataset*/
+    virtual bool remove() { return false; }
+
   signals:
     /** Emit a signal to notify of the progress event.
       * Emited theProgress is in percents (0.0-100.0) */