Offline editing plugin: add option to filter editable remote layers using capabilities

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@14560 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mwalker

src/plugins/offline_editing/offline_editing_plugin_gui.cpp

@@ -21,6 +21,8 @@
 #include <qgscontexthelp.h>
 #include <qgsmaplayer.h>
 #include <qgsmaplayerregistry.h>
+#include <qgsvectordataprovider.h>
+#include <qgsvectorlayer.h>
 
 #include <QFileDialog>
 #include <QMessageBox>
@@ -39,15 +41,7 @@ QgsOfflineEditingPluginGui::QgsOfflineEditingPluginGui( QWidget* parent /*= 0*/,
   mOfflineDbFile = "offline.sqlite";
   ui_offlineDataPath->setText( QDir( mOfflineDataPath ).absoluteFilePath( mOfflineDbFile ) );
 
-  QMap<QString, QgsMapLayer*> mapLayers = QgsMapLayerRegistry::instance()->mapLayers();
-  for ( QMap<QString, QgsMapLayer*>::iterator layer_it = mapLayers.begin() ; layer_it != mapLayers.end(); ++layer_it )
-  {
-    if ( layer_it.value()->type() == QgsMapLayer::VectorLayer )
-    {
-      QListWidgetItem* item = new QListWidgetItem( layer_it.value()->name(), ui_layerList );
-      item->setData( Qt::UserRole, QVariant( layer_it.key() ) );
-    }
-  }
+  updateLayerList( checkboxShowEditableLayers->checkState() == Qt::Checked );
 }
 
 QgsOfflineEditingPluginGui::~QgsOfflineEditingPluginGui()
@@ -69,6 +63,36 @@ QStringList& QgsOfflineEditingPluginGui::selectedLayerIds()
   return mSelectedLayerIds;
 }
 
+void QgsOfflineEditingPluginGui::updateLayerList( bool filterEditableLayers )
+{
+  ui_layerList->clear();
+
+  QMap<QString, QgsMapLayer*> mapLayers = QgsMapLayerRegistry::instance()->mapLayers();
+  for ( QMap<QString, QgsMapLayer*>::iterator layer_it = mapLayers.begin() ; layer_it != mapLayers.end(); ++layer_it )
+  {
+    if ( layer_it.value()->type() == QgsMapLayer::VectorLayer )
+    {
+      QgsVectorLayer* layer = qobject_cast<QgsVectorLayer*>( layer_it.value() );
+
+      bool showLayer = true;
+      if ( filterEditableLayers )
+      {
+          int cap = layer->dataProvider()->capabilities();
+          showLayer = ( cap & QgsVectorDataProvider::AddFeatures ) &&
+                      ( cap & QgsVectorDataProvider::DeleteFeatures ) &&
+                      ( cap & QgsVectorDataProvider::ChangeAttributeValues ) &&
+                      ( cap & QgsVectorDataProvider::AddAttributes ) &&
+                      ( cap & QgsVectorDataProvider::ChangeGeometries );
+      }
+      if ( showLayer )
+      {
+          QListWidgetItem* item = new QListWidgetItem( layer->name(), ui_layerList );
+          item->setData( Qt::UserRole, QVariant( layer_it.key() ) );
+      }
+    }
+  }
+}
+
 void QgsOfflineEditingPluginGui::on_butBrowse_clicked()
 {
   QString fileName = QFileDialog::getSaveFileName( this,
@@ -85,6 +109,11 @@ void QgsOfflineEditingPluginGui::on_butBrowse_clicked()
   }
 }
 
+void QgsOfflineEditingPluginGui::on_checkboxShowEditableLayers_stateChanged( int state )
+{
+    updateLayerList( checkboxShowEditableLayers->checkState() == Qt::Checked );
+}
+
 void QgsOfflineEditingPluginGui::on_buttonBox_accepted()
 {
   if ( QFile( QDir( mOfflineDataPath ).absoluteFilePath( mOfflineDbFile ) ).exists() )

src/plugins/offline_editing/offline_editing_plugin_gui.h

@@ -35,13 +35,16 @@ class QgsOfflineEditingPluginGui : public QDialog, private Ui::QgsOfflineEditing
     QStringList& selectedLayerIds();
 
   private:
+    void updateLayerList( bool filterEditableLayers );
+
     static const int context_id = 0;
     QString mOfflineDataPath;
     QString mOfflineDbFile;
     QStringList mSelectedLayerIds;
 
   private slots:
     void on_butBrowse_clicked();
+    void on_checkboxShowEditableLayers_stateChanged( int state );
     void on_buttonBox_accepted();
     void on_buttonBox_rejected();
     void on_buttonBox_helpRequested();

src/plugins/offline_editing/offline_editing_plugin_guibase.ui

@@ -63,14 +63,28 @@
     </layout>
    </item>
    <item>
-    <widget class="QDialogButtonBox" name="buttonBox">
-     <property name="orientation">
-      <enum>Qt::Horizontal</enum>
-     </property>
-     <property name="standardButtons">
-      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
-     </property>
-    </widget>
+    <layout class="QHBoxLayout" name="horizontalLayout_2">
+     <item>
+      <widget class="QCheckBox" name="checkboxShowEditableLayers">
+       <property name="text">
+        <string>Show only editable layers</string>
+       </property>
+       <property name="checked">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QDialogButtonBox" name="buttonBox">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="standardButtons">
+        <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+       </property>
+      </widget>
+     </item>
+    </layout>
    </item>
   </layout>
  </widget>