WFS: add support (#4164)

Author: wonder-sk

src/providers/wfs/qgswfsdataitems.cpp

@@ -0,0 +1,125 @@
+#include "qgswfsdataitems.h"
+
+#include "qgswfsprovider.h"
+#include "qgswfsconnection.h"
+#include "qgswfssourceselect.h"
+
+#include <QSettings>
+#include <QCoreApplication>
+
+
+QgsWFSLayerItem::QgsWFSLayerItem( QgsDataItem* parent, QString connName, QString name, QString title )
+    : QgsLayerItem( parent, title, parent->path() + "/" + name, QString(), QgsLayerItem::Vector, "WFS" )
+{
+  mUri = QgsWFSConnection( connName ).uriGetFeature( name );
+  mPopulated = true;
+}
+
+QgsWFSLayerItem::~QgsWFSLayerItem()
+{
+}
+
+////
+
+QgsWFSConnectionItem::QgsWFSConnectionItem( QgsDataItem* parent, QString name, QString path )
+    : QgsDataCollectionItem( parent, name, path ), mName( name ), mConn( NULL )
+{
+}
+
+QgsWFSConnectionItem::~QgsWFSConnectionItem()
+{
+}
+
+QVector<QgsDataItem*> QgsWFSConnectionItem::createChildren()
+{
+  mGotCapabilities = false;
+  mConn = new QgsWFSConnection( mName, this );
+  connect( mConn, SIGNAL( gotCapabilities() ), this, SLOT( gotCapabilities() ) );
+
+  mConn->requestCapabilities();
+
+  while ( !mGotCapabilities )
+  {
+    QCoreApplication::processEvents( QEventLoop::ExcludeUserInputEvents );
+  }
+
+  QVector<QgsDataItem*> layers;
+  if ( mConn->errorCode() == QgsWFSConnection::NoError )
+  {
+    QgsWFSConnection::GetCapabilities caps = mConn->capabilities();
+    foreach( const QgsWFSConnection::FeatureType& featureType, caps.featureTypes )
+    {
+      QgsWFSLayerItem* layer = new QgsWFSLayerItem( this, mName, featureType.name, featureType.title );
+      layers.append( layer );
+    }
+  }
+  else
+  {
+    // TODO: return an "error" item
+  }
+
+  mConn->deleteLater();
+  mConn = NULL;
+
+  return layers;
+}
+
+void QgsWFSConnectionItem::gotCapabilities()
+{
+  mGotCapabilities = true;
+}
+
+//////
+
+
+QgsWFSRootItem::QgsWFSRootItem( QgsDataItem* parent, QString name, QString path )
+    : QgsDataCollectionItem( parent, name, path )
+{
+  mIcon = QIcon( getThemePixmap( "mIconWms.png" ) );
+
+  populate();
+}
+
+QgsWFSRootItem::~QgsWFSRootItem()
+{
+}
+
+QVector<QgsDataItem*> QgsWFSRootItem::createChildren()
+{
+  QVector<QgsDataItem*> connections;
+  QSettings settings;
+
+  settings.beginGroup( "/Qgis/connections-wfs" );
+  foreach( QString connName,  settings.childGroups() )
+  {
+    QgsDataItem * conn = new QgsWFSConnectionItem( this, connName, mPath + "/" + connName );
+    connections.append( conn );
+  }
+  return connections;
+}
+
+QWidget * QgsWFSRootItem::paramWidget()
+{
+  QgsWFSSourceSelect *select = new QgsWFSSourceSelect( 0, 0 );
+  connect( select, SIGNAL( connectionsChanged() ), this, SLOT( connectionsChanged() ) );
+  return select;
+}
+
+void QgsWFSRootItem::connectionsChanged()
+{
+  refresh();
+}
+
+
+QGISEXTERN int dataCapabilities()
+{
+  return  QgsDataProvider::Net;
+}
+
+QGISEXTERN QgsDataItem * dataItem( QString thePath, QgsDataItem* parentItem )
+{
+  Q_UNUSED( thePath );
+
+  return new QgsWFSRootItem( parentItem, "WFS", "wfs:" );
+}
+

src/providers/wfs/qgswfsdataitems.h

@@ -0,0 +1,53 @@
+#ifndef QGSWFSDATAITEMS_H
+#define QGSWFSDATAITEMS_H
+
+#include "qgsdataitem.h"
+
+class QgsWFSRootItem : public QgsDataCollectionItem
+{
+    Q_OBJECT
+  public:
+    QgsWFSRootItem( QgsDataItem* parent, QString name, QString path );
+    ~QgsWFSRootItem();
+
+    QVector<QgsDataItem*> createChildren();
+
+    virtual QWidget * paramWidget();
+
+  public slots:
+    void connectionsChanged();
+};
+
+class QgsWFSConnection;
+
+class QgsWFSConnectionItem : public QgsDataCollectionItem
+{
+    Q_OBJECT
+  public:
+    QgsWFSConnectionItem( QgsDataItem* parent, QString name, QString path );
+    ~QgsWFSConnectionItem();
+
+    QVector<QgsDataItem*> createChildren();
+    //virtual bool equal( const QgsDataItem *other );
+
+  private slots:
+    void gotCapabilities();
+
+  private:
+    QString mName;
+
+    QgsWFSConnection* mConn;
+    bool mGotCapabilities;
+};
+
+
+class QgsWFSLayerItem : public QgsLayerItem
+{
+  public:
+    QgsWFSLayerItem( QgsDataItem* parent, QString connName, QString name, QString title );
+    ~QgsWFSLayerItem();
+
+};
+
+
+#endif // QGSWFSDATAITEMS_H

src/providers/wfs/qgswfssourceselect.cpp

@@ -201,6 +201,7 @@ void QgsWFSSourceSelect::addEntryToServerList()
   if ( nc.exec() )
   {
     populateConnectionList();
+    emit connectionsChanged();
   }
 }
 
@@ -212,6 +213,7 @@ void QgsWFSSourceSelect::modifyEntryOfServerList()
   if ( nc.exec() )
   {
     populateConnectionList();
+    emit connectionsChanged();
   }
 }
 
@@ -224,6 +226,7 @@ void QgsWFSSourceSelect::deleteEntryOfServerList()
   {
     QgsWFSConnection::deleteConnection( cmbConnections->currentText() );
     cmbConnections->removeItem( cmbConnections->currentIndex() );
+    emit connectionsChanged();
   }
 }
 
@@ -346,4 +349,5 @@ void QgsWFSSourceSelect::on_btnLoad_clicked()
   QgsManageConnectionsDialog dlg( this, QgsManageConnectionsDialog::Import, QgsManageConnectionsDialog::WFS, fileName );
   dlg.exec();
   populateConnectionList();
+  emit connectionsChanged();
 }

src/providers/wfs/qgswfssourceselect.h

@@ -35,6 +35,7 @@ class QgsWFSSourceSelect: public QDialog, private Ui::QgsWFSSourceSelectBase
 
   signals:
     void addWfsLayer( QString uri, QString typeName );
+    void connectionsChanged();
 
   private:
     QgsWFSSourceSelect(); //default constructor is forbidden