Fixes compilation of bindings, added wrapper for QgsSnapper.

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@7893 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: wonder

python/core/core.sip

@@ -42,6 +42,7 @@
 %Include qgsrenderer.sip
 %Include qgsscalecalculator.sip
 %Include qgssinglesymbolrenderer.sip
+%Include qgssnapper.sip
 %Include qgsspatialindex.sip
 %Include qgsspatialrefsys.sip
 %Include qgssymbol.sip

python/core/qgsgeometry.sip

@@ -301,7 +301,7 @@ class QgsGeometry
     /**
         Returns the squared cartesian distance between the given point
         to the given vertex index*/
-	double sqrDistToVertexAt(QgsPoint& point /In, int atVertex);
+	double sqrDistToVertexAt(QgsPoint& point /In/, int atVertex);
 
 
 	/**

python/core/qgssnapper.sip

@@ -0,0 +1,74 @@
+
+/**Describes the result of a snapping operation*/
+struct QgsSnappingResult
+{
+%TypeHeaderCode
+#include <qgssnapper.h>
+%End
+  
+  /**The coordinates of the snapping result*/
+  QgsPoint snappedVertex;
+  /**The vertex index of snappedVertex 
+   or -1 if no such vertex number (e.g. snap to segment)*/
+  int snappedVertexNr;
+  /**The layer coordinates of the vertex before snappedVertex*/
+  QgsPoint beforeVertex;
+  /**The index of the vertex before snappedVertex
+   or -1 if no such vertex*/
+  int beforeVertexNr;
+  /**The layer coordinates of the vertex after snappedVertex*/
+  QgsPoint afterVertex;
+  /**The index of the vertex after snappedVertex
+   or -1 if no such vertex*/
+  int afterVertexNr;
+  /**Index of the snapped geometry*/
+  int snappedAtGeometry;
+  /**Layer where the snap occured*/
+  const QgsVectorLayer* layer;
+};
+
+
+
+/**A class that allows advanced snapping operations on a set of vector layers*/
+class QgsSnapper
+{
+%TypeHeaderCode
+#include <qgssnapper.h>
+%End
+  
+public:
+  /**Snap to vertex, to segment or both*/
+  enum SNAP_TO
+    {
+      SNAP_TO_VERTEX,
+      SNAP_TO_SEGMENT,
+      //snap to vertex and also to segment if no vertex is within the search tolerance
+      SNAP_TO_VERTEX_AND_SEGMENT
+    };
+  
+  enum SNAP_MODE
+    {
+      /**Only one snapping result is retured*/
+      ONE_RESULT,
+      /**Several snapping results which have the same position are returned. This is usefull for topological
+       editing*/
+      SEVERAL_RESULTS_SAME_POSITION,
+      /**All results within the given layer tolerances are returned*/
+      ALL_RESULTS_WITHIN_GIVEN_TOLERANCES
+    };
+
+  QgsSnapper(QgsMapRender* mapRender);
+  ~QgsSnapper();
+  /**Does the snapping operation
+   @param startPoint the start point for snapping (in pixel coordinates)
+  @param snappingResult the list where the results are inserted (everything in map coordinate system)
+  @return 0 in case of success*/
+  int snapPoint(const QPoint& startPoint, QList<QgsSnappingResult>& snappingResult);
+
+  //setters
+  void setLayersToSnap(const QList<QgsVectorLayer*>& layerList);
+  void setTolerances(const QList<double>& toleranceList);
+  // TODO wrap void setSnapToList(const QList<QgsSnapper::SNAP_TO>& snapToList);
+  void setSnapMode(QgsSnapper::SNAP_MODE snapMode);
+
+};

python/core/qgsvectorlayer.sip

@@ -245,8 +245,9 @@ existing rings, 5 no feature found where ring can be inserted*/
      @param snap_to to segment / to vertex
      @return 0 in case of success
   */
-  int snapWithContext(const QgsPoint& startPoint, double snappingTolerance, QMultiMap<double, QgsSnappingResult>& snappingResults, \
-	      QgsSnapper::SNAP_TO snap_to);
+  // TODO: wrap QMultiMap
+  //int snapWithContext(const QgsPoint& startPoint, double snappingTolerance, QMultiMap<double, QgsSnappingResult>& snappingResults,
+	//      QgsSnapper::SNAP_TO snap_to);
 
   /**
     Commits edited attributes. Depending on the feature id,