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fd41d31316
git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@8997 c8812cc2-4d05-0410-92ff-de0c093fc19c
75 lines
2.2 KiB
Plaintext
75 lines
2.2 KiB
Plaintext
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/**Describes the result of a snapping operation*/
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struct QgsSnappingResult
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{
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%TypeHeaderCode
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#include <qgssnapper.h>
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%End
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/**The coordinates of the snapping result*/
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QgsPoint snappedVertex;
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/**The vertex index of snappedVertex
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or -1 if no such vertex number (e.g. snap to segment)*/
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int snappedVertexNr;
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/**The layer coordinates of the vertex before snappedVertex*/
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QgsPoint beforeVertex;
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/**The index of the vertex before snappedVertex
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or -1 if no such vertex*/
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int beforeVertexNr;
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/**The layer coordinates of the vertex after snappedVertex*/
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QgsPoint afterVertex;
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/**The index of the vertex after snappedVertex
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or -1 if no such vertex*/
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int afterVertexNr;
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/**Index of the snapped geometry*/
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int snappedAtGeometry;
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/**Layer where the snap occured*/
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const QgsVectorLayer* layer;
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};
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/**A class that allows advanced snapping operations on a set of vector layers*/
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class QgsSnapper
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{
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%TypeHeaderCode
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#include <qgssnapper.h>
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%End
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public:
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/**Snap to vertex, to segment or both*/
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enum SNAP_TO
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{
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SNAP_TO_VERTEX,
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SNAP_TO_SEGMENT,
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//snap to vertex and also to segment if no vertex is within the search tolerance
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SNAP_TO_VERTEX_AND_SEGMENT
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};
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enum SNAP_MODE
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{
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/**Only one snapping result is retured*/
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ONE_RESULT,
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/**Several snapping results which have the same position are returned. This is usefull for topological
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editing*/
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SEVERAL_RESULTS_SAME_POSITION,
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/**All results within the given layer tolerances are returned*/
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ALL_RESULTS_WITHIN_GIVEN_TOLERANCES
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};
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QgsSnapper(QgsMapRenderer* mapRender);
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~QgsSnapper();
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/**Does the snapping operation
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@param startPoint the start point for snapping (in pixel coordinates)
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@param snappingResult the list where the results are inserted (everything in map coordinate system)
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@return 0 in case of success*/
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int snapPoint(const QPoint& startPoint, QList<QgsSnappingResult>& snappingResult, const QList<QgsPoint>& excludeList);
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//setters
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void setLayersToSnap(const QList<QgsVectorLayer*>& layerList);
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void setTolerances(const QList<double>& toleranceList);
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// TODO wrap void setSnapToList(const QList<QgsSnapper::SNAP_TO>& snapToList);
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void setSnapMode(QgsSnapper::SNAP_MODE snapMode);
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};
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