[FEATURE] allow to specify FEATURE_COUNT for WMS GetFeatureInfo

Author: jef-n

src/providers/wms/qgswmsprovider.cpp

@@ -91,6 +91,7 @@ QgsWmsProvider::QgsWmsProvider( QString const &uri )
     , mErrors( 0 )
     , mUserName( QString::null )
     , mPassword( QString::null )
+    , mFeatureCount( 0 )
 {
   // URL may contain username/password information for a WMS
   // requiring authentication. In this case the URL is prefixed
@@ -162,6 +163,10 @@ void QgsWmsProvider::parseUri( QString uri )
         }
         qSort( mResolutions );
       }
+      else if ( item.startsWith( "featureCount=" ) )
+      {
+        mFeatureCount = item.mid( 13 ).toInt();
+      }
       else if ( item.startsWith( "url=" ) )
       {
         // strip the authentication information from the front of the uri
@@ -2954,6 +2959,11 @@ QStringList QgsWmsProvider::identifyAs( const QgsPoint& point, QString format )
         setQueryItem( requestUrl, "X", QString::number( point.x() ) );
         setQueryItem( requestUrl, "Y", QString::number( point.y() ) );
 
+        if( mFeatureCount > 0 )
+        {
+          setQueryItem( requestUrl, "FEATURE_COUNT", QString::number( mFeatureCount ) );
+        }
+
         // X,Y in WMS 1.1.1; I,J in WMS 1.3.0
         //   requestUrl += QString( "&I=%1&J=%2" ).arg( point.x() ).arg( point.y() );
 

src/providers/wms/qgswmsprovider.h

@@ -959,6 +959,9 @@ class QgsWmsProvider : public QgsRasterDataProvider
     int mTileHeight;
     QVector<double> mResolutions;
 
+    //! FEATURE_COUNT for GetFeatureInfo
+    int mFeatureCount;
+
     //! whether to use hrefs from GetCapabilities (default) or
     // the given base urls for GetMap and GetFeatureInfo
     bool mIgnoreGetMapUrl;

src/providers/wms/qgswmssourceselect.cpp

@@ -71,6 +71,7 @@ QgsWMSSourceSelect::QgsWMSSourceSelect( QWidget * parent, Qt::WFlags fl, bool ma
 
   mTileWidth->setValidator( new QIntValidator( 0, 9999, this ) );
   mTileHeight->setValidator( new QIntValidator( 0, 9999, this ) );
+  mFeatureCount->setValidator( new QIntValidator( 0, 9999, this ) );
 
   mImageFormatGroup = new QButtonGroup;
 
@@ -470,6 +471,13 @@ void QgsWMSSourceSelect::addClicked()
                .arg( item->data( Qt::UserRole + 6 ).toStringList().join( ";" ) );
   }
 
+  if ( mFeatureCount->text().toInt() > 0 )
+  {
+    if( !connArgs.isEmpty() )
+      connArgs += ",";
+    connArgs += QString( "featureCount=%1" ).arg( mFeatureCount->text().toInt() );
+  }
+
   if ( !connArgs.isEmpty() )
   {
     if ( connInfo.startsWith( "username=" ) || connInfo.startsWith( "ignoreUrl=" ) )
@@ -483,10 +491,6 @@ void QgsWMSSourceSelect::addClicked()
   }
   QgsDebugMsg( "crs = " + crs );
 
-  // TODO: do it without QgisApp
-  //QgisApp::instance()->addRasterLayer( connInfo,
-  //                                     leLayerName->text().isEmpty() ? layers.join( "/" ) : leLayerName->text(),
-  //                                     "wms", layers, styles, format, crs );
   emit addRasterLayer( connInfo,
                        leLayerName->text().isEmpty() ? layers.join( "/" ) : leLayerName->text(),
                        "wms", layers, styles, format, crs );

src/ui/qgswmssourceselectbase.ui

@@ -220,7 +220,7 @@
           <item row="0" column="1" colspan="2">
            <widget class="QLineEdit" name="leLayerName"/>
           </item>
-          <item row="2" column="0" colspan="2">
+          <item row="3" column="0" colspan="2">
            <widget class="QLabel" name="labelCoordRefSys">
             <property name="text">
              <string>Coordinate Reference System</string>
@@ -230,7 +230,7 @@
             </property>
            </widget>
           </item>
-          <item row="2" column="2">
+          <item row="3" column="2">
            <widget class="QPushButton" name="btnChangeSpatialRefSys">
             <property name="enabled">
              <bool>false</bool>
@@ -241,20 +241,34 @@
            </widget>
           </item>
           <item row="1" column="1">
-           <widget class="QLineEdit" name="mTileWidth">
-           </widget>
+           <widget class="QLineEdit" name="mTileWidth"/>
           </item>
           <item row="1" column="0">
            <widget class="QLabel" name="label_2">
             <property name="text">
              <string>Tile size</string>
             </property>
+            <property name="buddy">
+             <cstring>mTileWidth</cstring>
+            </property>
            </widget>
           </item>
           <item row="1" column="2">
-           <widget class="QLineEdit" name="mTileHeight">
+           <widget class="QLineEdit" name="mTileHeight"/>
+          </item>
+          <item row="2" column="0" colspan="2">
+           <widget class="QLabel" name="label_3">
+            <property name="text">
+             <string>Feature limit for GetFeatureInfo</string>
+            </property>
+            <property name="buddy">
+             <cstring>mFeatureCount</cstring>
+            </property>
            </widget>
           </item>
+          <item row="2" column="2">
+           <widget class="QLineEdit" name="mFeatureCount"/>
+          </item>
          </layout>
         </widget>
        </item>