21 #include "qgis_core.h" 52 QList<QgsVectorLayer *>
layers()
const {
return mLayers; }
54 void setLayers(
const QList<QgsVectorLayer *> &layers );
78 double offset()
const {
return mOffset; }
85 void setOffset(
double offset );
91 void offsetParameters(
int &quadSegments
SIP_OUT,
int &joinStyle SIP_OUT,
double &miterLimit SIP_OUT );
97 void setOffsetParameters(
int quadSegments,
int joinStyle,
double miterLimit );
153 void invalidateGraph();
162 void onLayerDestroyed( QObject *obj );
166 std::unique_ptr< QgsTracerGraph > mGraph;
168 QList<QgsVectorLayer *> mLayers;
179 int mOffsetSegments = 8;
181 int mOffsetJoinStyle = 2;
183 double mOffsetMiterLimit = 5.;
189 int mMaxFeatureCount = 0;
195 bool mHasTopologyProblem =
false;
199 #endif // QGSTRACER_H QList< QgsVectorLayer * > layers() const
Get layers used for tracing.
A rectangle specified with double values.
bool isInitialized() const
Whether the internal data structures have been initialized.
virtual void configure()
Allows derived classes to setup the settings just before the tracer is initialized.
Utility class that construct a planar graph from the input vector layers and provides shortest path s...
A class to represent a 2D point.
QgsCoordinateReferenceSystem destinationCrs() const
Returns the CRS used for tracing.
A geometry is the spatial representation of a feature.
bool hasTopologyProblem() const
Whether there was an error during graph creation due to noding exception, indicating some input data ...
double offset() const
Get offset in map units that should be applied to the traced paths returned from findShortestPath().
int maxFeatureCount() const
Get maximum possible number of features in graph. If the number is exceeded, graph is not created...
Max feature count threshold was reached while reading features.
PathError
Possible errors that may happen when calling findShortestPath()
Simple graph structure for shortest path search.
Contains information about the context in which a coordinate transform is executed.
End point cannot be joined to the graph.
void setMaxFeatureCount(int count)
Get maximum possible number of features in graph. If the number is exceeded, graph is not created...
This class represents a coordinate reference system (CRS).
QgsRectangle extent() const
Get extent to which graph's features will be limited (empty extent means no limit) ...
Represents a vector layer which manages a vector based data sets.
Points are not connected in the graph.
Start point cannot be joined to the graph.