QGIS API Documentation 3.27.0-Master (a46f227e17)
qgsgeometrylineintersectioncheck.cpp
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1/***************************************************************************
2 qgsgeometrylineintersectioncheck.cpp
3 ---------------------
4 begin : June 2017
5 copyright : (C) 2017 by Sandro Mani / Sourcepole AG
6 email : smani at sourcepole dot ch
7 ***************************************************************************
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 ***************************************************************************/
15
18#include "qgslinestring.h"
19#include "qgsvectorlayer.h"
21
22void QgsGeometryLineIntersectionCheck::collectErrors( const QMap<QString, QgsFeaturePool *> &featurePools, QList<QgsGeometryCheckError *> &errors, QStringList &messages, QgsFeedback *feedback, const LayerFeatureIds &ids ) const
23{
24 Q_UNUSED( messages )
25
26 const QMap<QString, QgsFeatureIds> featureIds = ids.isEmpty() ? allLayerFeatureIds( featurePools ) : ids.toMap();
27 const QgsGeometryCheckerUtils::LayerFeatures layerFeaturesA( featurePools, featureIds, compatibleGeometryTypes(), feedback, mContext, true );
28 QList<QString> layerIds = featureIds.keys();
29 for ( const QgsGeometryCheckerUtils::LayerFeature &layerFeatureA : layerFeaturesA )
30 {
31 // Ensure each pair of layers only gets compared once: remove the current layer from the layerIds, but add it to the layerList for layerFeaturesB
32 layerIds.removeOne( layerFeatureA.layer()->id() );
33
34 const QgsAbstractGeometry *geom = layerFeatureA.geometry().constGet();
35 for ( int iPart = 0, nParts = geom->partCount(); iPart < nParts; ++iPart )
36 {
37 const QgsLineString *line = dynamic_cast<const QgsLineString *>( QgsGeometryCheckerUtils::getGeomPart( geom, iPart ) );
38 if ( !line )
39 {
40 // Should not happen
41 continue;
42 }
43
44 // Check whether the line intersects with any other lines
45 const QgsGeometryCheckerUtils::LayerFeatures layerFeaturesB( featurePools, QList<QString>() << layerFeatureA.layer()->id() << layerIds, line->boundingBox(), {QgsWkbTypes::LineGeometry}, mContext );
46 for ( const QgsGeometryCheckerUtils::LayerFeature &layerFeatureB : layerFeaturesB )
47 {
48 // > : only report intersections within same layer once
49 if ( layerFeatureA.layer()->id() == layerFeatureB.layer()->id() && layerFeatureB.feature().id() > layerFeatureA.feature().id() )
50 {
51 continue;
52 }
53
54 const QgsAbstractGeometry *testGeom = layerFeatureB.geometry().constGet();
55 for ( int jPart = 0, mParts = testGeom->partCount(); jPart < mParts; ++jPart )
56 {
57 // Skip current feature part, only report intersections within same part once
58 if ( layerFeatureB.feature().id() == layerFeatureA.feature().id() && iPart >= jPart )
59 {
60 continue;
61 }
62 const QgsLineString *testLine = dynamic_cast<const QgsLineString *>( QgsGeometryCheckerUtils::getGeomPart( testGeom, jPart ) );
63 if ( !testLine )
64 {
65 continue;
66 }
67 const QList< QgsPoint > intersections = QgsGeometryCheckerUtils::lineIntersections( line, testLine, mContext->tolerance );
68 for ( const QgsPoint &inter : intersections )
69 {
70 errors.append( new QgsGeometryCheckError( this, layerFeatureA, inter, QgsVertexId( iPart ), layerFeatureB.id() ) );
71 }
72 }
73 }
74 }
75 }
76}
77
78void QgsGeometryLineIntersectionCheck::fixError( const QMap<QString, QgsFeaturePool *> &featurePools, QgsGeometryCheckError *error, int method, const QMap<QString, int> & /*mergeAttributeIndices*/, Changes & /*changes*/ ) const
79{
80 Q_UNUSED( featurePools )
81
82 if ( method == NoChange )
83 {
84 error->setFixed( method );
85 }
86 else
87 {
88 error->setFixFailed( tr( "Unknown method" ) );
89 }
90}
91
93{
94 static const QStringList methods = QStringList() << tr( "No action" );
95 return methods;
96}
97
99{
101}
Abstract base class for all geometries.
virtual int partCount() const =0
Returns count of parts contained in the geometry.
QgsRectangle boundingBox() const override
Returns the minimal bounding box for the geometry.
Definition: qgscurve.cpp:238
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:45
const double tolerance
The tolerance to allow for in geometry checks.
This represents an error reported by a geometry check.
void setFixed(int method)
Set the status to fixed and specify the method that has been used to fix the error.
void setFixFailed(const QString &reason)
Set the error status to failed and specify the reason for failure.
QMap< QString, QMap< QgsFeatureId, QList< QgsGeometryCheck::Change > > > Changes
A collection of changes.
const QgsGeometryCheckContext * mContext
CheckType
The type of a check.
@ FeatureNodeCheck
The check controls individual nodes.
QMap< QString, QgsFeatureIds > allLayerFeatureIds(const QMap< QString, QgsFeaturePool * > &featurePools) const
Returns all layers and feature ids.
A layer feature combination to uniquely identify and access a feature in a set of layers.
Contains a set of layers and feature ids in those layers to pass to a geometry check.
static QgsAbstractGeometry * getGeomPart(QgsAbstractGeometry *geom, int partIdx)
static QList< QgsPoint > lineIntersections(const QgsLineString *line1, const QgsLineString *line2, double tol)
void fixError(const QMap< QString, QgsFeaturePool * > &featurePools, QgsGeometryCheckError *error, int method, const QMap< QString, int > &mergeAttributeIndices, Changes &changes) const override
Fixes the error error with the specified method.
QList< QgsWkbTypes::GeometryType > compatibleGeometryTypes() const override
A list of geometry types for which this check can be performed.
static QgsGeometryCheck::CheckType factoryCheckType()
Q_DECL_DEPRECATED QStringList resolutionMethods() const override
Returns a list of descriptions for available resolutions for errors.
void collectErrors(const QMap< QString, QgsFeaturePool * > &featurePools, QList< QgsGeometryCheckError * > &errors, QStringList &messages, QgsFeedback *feedback, const LayerFeatureIds &ids=LayerFeatureIds()) const override
The main worker method.
Line string geometry type, with support for z-dimension and m-values.
Definition: qgslinestring.h:45
Point geometry type, with support for z-dimension and m-values.
Definition: qgspoint.h:49
A list of layers and feature ids for each of these layers.
QMap< QString, QgsFeatureIds > toMap() const
Utility class for identifying a unique vertex within a geometry.
Definition: qgsvertexid.h:31