Initial commit

Lts/Viewer/SituationMap/GeometryModel/geometry_node_visitor.h

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+/**
+**
+** @RDE_HEADER@
+** Node visitor for GeometryModel.
+** $Id$
+** $HeadURL$
+** $Author$
+**
+** -----------------------------------------------------------------------------------------------
+**
+** Hardware-Environment: Intel-PC
+** Software-Environment: Windows 7, Qt 5.4. ArcGIS 10.2.5
+**
+** Language ........: C++ 11
+**
+** -----------------------------------------------------------------------------------------------
+**
+** Author ...........: Jörg Turla, SPD G, Tel. 3132
+**
+** -----------------------------------------------------------------------------------------------
+**
+** Notes .........:
+**
+**   07.07.2016, JT  : First edition for use with Qt5
+**
+** -----------------------------------------------------------------------------------------------
+*/
+
+#pragma once
+
+#include "geometry_model.h"
+
+namespace SituationMap
+{
+
+/**
+  GeometryNopdeVisitor implements visitor pattern to traverse geoemtry model tree. The apply function will be
+  called for each node in geometry model.
+*/
+class GEOMETRYMODEL_EXPORT GeometryNodeVisitor
+{
+public:
+
+  explicit GeometryNodeVisitor(GeometryModel *geoModel);
+  virtual ~GeometryNodeVisitor() = default;
+  GeometryNodeVisitor(const GeometryNodeVisitor &)              = delete;
+
+  /**
+    Traversing the complete geometry model
+  */
+  bool traverse();
+
+  /**
+    Traversing the sub-tree of node. Coming in deepth first.
+  */
+  bool traverse(GeometryModel::Node node);
+
+protected:
+
+  /**
+    For each node the apply function will be called. If apply returns false the traversal is aborted. In
+    other case if return value is true the traversel is continued.
+
+    @param geoModel  Pointer to geometry model
+    @param node      Node of geometry model
+    @param nodeType  Type of node
+    @return          false to abort traversael otherwise true
+  */
+  virtual bool apply(GeometryModel *geoModel, const GeometryModel::Node &node, GeometryModel::PrimitiveType nodeType) = 0;
+
+  GeometryModel *m_geometryModel;
+
+}; // GeometryNodeVisitor
+
+} // namespace SituationMap