ENH: read display settings from descriptor

Code/Common/mvdDatasetDescriptor.cxx

@@ -205,33 +205,39 @@ DatasetDescriptor
 
   // TODO: Generalize code section.
   if( imageSettings!=NULL )
-  {
-  VectorImageModel::Settings* settings =
-    static_cast< VectorImageModel::Settings* >( imageSettings );
-
-  // Access settings group element.
-  QDomElement settingsElt(
-    imageInfoElt.firstChildElement( TAG_NAMES[ ELEMENT_SETTINGS_GROUP ] )
-  );
-  // TODO: Manage XML structure errors.
-  assert( !settingsElt.isNull() );
+    {
+    VectorImageModel::Settings* settings =
+      static_cast< VectorImageModel::Settings* >( imageSettings );
 
-  // RGB
-  QDomElement rgbElt(
-    settingsElt.firstChildElement( TAG_NAMES[ ELEMENT_RGB_CHANNELS  ] )
-  );
-  // TODO: Manage XML structure errors.
-  assert( !rgbElt.isNull() );
-  // TODO: Get RGB channels from XML element.
+    // Access settings group element.
+    QDomElement settingsElt(
+      imageInfoElt.firstChildElement( TAG_NAMES[ ELEMENT_SETTINGS_GROUP ] )
+    );
+    // TODO: Manage XML structure errors.
+    assert( !settingsElt.isNull() );
 
-  // Dynamics
-  QDomElement dynamicsElt(
-    settingsElt.firstChildElement( TAG_NAMES[ ELEMENT_DYNAMICS_PARAMETERS ] )
-  );
-  // TODO: Manage XML structure errors.
-  assert( !dynamicsElt.isNull() );
-  // TODO: Get dynamics parameters from XML element.
-  }
+    // RGB
+    QDomElement rgbElt(
+      settingsElt.firstChildElement( TAG_NAMES[ ELEMENT_RGB_CHANNELS  ] )
+    );
+    // TODO: Manage XML structure errors.
+    assert( !rgbElt.isNull() );
+    VectorImageModel::Settings::ChannelVector rgb;
+    ExtractVectorFromNode( rgb, rgbElt );
+    assert( rgb.size() == 3 );
+    settings->SetRgbChannels( rgb );
+
+    // Dynamics
+    QDomElement dynamicsElt(
+      settingsElt.firstChildElement( TAG_NAMES[ ELEMENT_DYNAMICS_PARAMETERS ] )
+    );
+    // TODO: Manage XML structure errors.
+    assert( !dynamicsElt.isNull() );
+    ParametersType dynamics;
+    ExtractArrayFromNode( dynamics, dynamicsElt );
+    assert( dynamics.GetSize() == 6 );
+    settings->SetDynamicsParams( dynamics );
+    }
 }
 
 /*******************************************************************************/

Code/Common/mvdDatasetDescriptor.h

@@ -45,6 +45,7 @@
 
 //
 // Monteverdi includes (sorted by alphabetic order)
+#include "mvdTypes.h"
 #include "mvdAbstractModel.h"
 
 
@@ -179,9 +180,27 @@ private:
   template< typename TInputIterator >
   inline
   QDomElement CreateContainerNode( const TInputIterator& first,
-				   const TInputIterator& last,
+                                   const TInputIterator& last,
                                    const QString& tagName );
 
+  /**
+   * \brief Deserialize a std::vector from a QDomElement
+   */
+  template< typename T >
+  inline
+  static
+  void ExtractVectorFromNode( std::vector<T>& vector,
+                              QDomElement& tagName );
+  
+  /**
+   * \brief Deserialize a itk::Array from a QDomElement
+   */
+  template< typename T >
+  inline
+  static
+  void ExtractArrayFromNode( itk::Array<T>& array,
+                             QDomElement& tagName );
+  
   /**
    */
   void Read( const QString& filename );
@@ -308,6 +327,58 @@ DatasetDescriptor
   return vectorElement;
 }
 
+template< typename T >
+inline
+void
+DatasetDescriptor
+::ExtractVectorFromNode( std::vector<T>& vector,
+                         QDomElement& element )
+{
+  QDomNode node = element.firstChild();
+  // TODO: Manage XML structure errors.
+  assert( !node.isNull() );
+  assert( node.isText() );
+  
+  QDomText textNode = node.toText();
+  assert( !textNode.isNull() );
+
+  QString data = textNode.data();
+  QStringList stringList = data.split(" ");
+  
+  vector.resize(stringList.size());
+  for (size_t i = 0; i < stringList.size(); ++i)
+    {
+      QVariant v = stringList[i];
+      vector[i] = v.value<T>();
+    }
+}
+
+template< typename T >
+inline
+void
+DatasetDescriptor
+::ExtractArrayFromNode( itk::Array<T>& array,
+                        QDomElement& element )
+{
+  QDomNode node = element.firstChild();
+  // TODO: Manage XML structure errors.
+  assert( !node.isNull() );
+  assert( node.isText() );
+  
+  QDomText textNode = node.toText();
+  assert( !textNode.isNull() );
+  
+  QString data = textNode.data();
+  QStringList stringList = data.split(" ");
+  
+  array.SetSize(stringList.size());
+  for (size_t i = 0; i < stringList.size(); ++i)
+  {
+    QVariant v = stringList[i];
+    array[i] = v.value<T>();
+  }
+}
+
 } // end namespace 'mvd'
 
 #endif // __mvdDatasetDescriptor_h