QGIS API Documentation 3.27.0-Master (a46f227e17)
qgsgeometrydanglecheck.cpp
Go to the documentation of this file.
1/***************************************************************************
2 qgsgeometrydanglecheck.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 QgsGeometryDangleCheck::collectErrors( const QMap<QString, QgsFeaturePool *> &featurePools, QList<QgsGeometryCheckError *> &errors, QStringList &messages, QgsFeedback *feedback, const LayerFeatureIds &ids ) const
23{
24 Q_UNUSED( messages )
25 const QMap<QString, QgsFeatureIds> featureIds = ids.isEmpty() ? allLayerFeatureIds( featurePools ) : ids.toMap();
26 const QgsGeometryCheckerUtils::LayerFeatures layerFeatures( featurePools, featureIds, compatibleGeometryTypes(), feedback, mContext );
27 for ( const QgsGeometryCheckerUtils::LayerFeature &layerFeature : layerFeatures )
28 {
29 const QgsAbstractGeometry *geom = layerFeature.geometry().constGet();
30 for ( int iPart = 0, nParts = geom->partCount(); iPart < nParts; ++iPart )
31 {
32 const QgsLineString *line = dynamic_cast<const QgsLineString *>( QgsGeometryCheckerUtils::getGeomPart( geom, iPart ) );
33 if ( !line )
34 {
35 // Should not happen
36 continue;
37 }
38 // Check that start and end node lie on a line
39 const int nVerts = geom->vertexCount( iPart, 0 );
40 const QgsPoint &p1 = geom->vertexAt( QgsVertexId( iPart, 0, 0 ) );
41 const QgsPoint &p2 = geom->vertexAt( QgsVertexId( iPart, 0, nVerts - 1 ) );
42
43 bool p1touches = QgsGeometryCheckerUtils::pointOnLine( p1, line, mContext->tolerance, true );
44 bool p2touches = QgsGeometryCheckerUtils::pointOnLine( p2, line, mContext->tolerance, true );
45
46 if ( p1touches && p2touches )
47 {
48 // Both endpoints lie on line itself
49 continue;
50 }
51
52 // Check whether endpoints line on another line in the layer
53 const QgsGeometryCheckerUtils::LayerFeatures checkFeatures( featurePools, QList<QString>() << layerFeature.layer()->id(), line->boundingBox(), {QgsWkbTypes::LineGeometry}, mContext );
54 for ( const QgsGeometryCheckerUtils::LayerFeature &checkFeature : checkFeatures )
55 {
56 const QgsAbstractGeometry *testGeom = checkFeature.geometry().constGet();
57 for ( int jPart = 0, mParts = testGeom->partCount(); jPart < mParts; ++jPart )
58 {
59 if ( checkFeature.feature().id() == layerFeature.feature().id() && iPart == jPart )
60 {
61 // Skip current feature part, it was already checked above
62 continue;
63 }
64 const QgsLineString *testLine = dynamic_cast<const QgsLineString *>( QgsGeometryCheckerUtils::getGeomPart( testGeom, jPart ) );
65 if ( !testLine )
66 {
67 continue;
68 }
69 p1touches = p1touches || QgsGeometryCheckerUtils::pointOnLine( p1, testLine, mContext->tolerance );
70 p2touches = p2touches || QgsGeometryCheckerUtils::pointOnLine( p2, testLine, mContext->tolerance );
71 if ( p1touches && p2touches )
72 {
73 break;
74 }
75 }
76 if ( p1touches && p2touches )
77 {
78 break;
79 }
80 }
81 if ( p1touches && p2touches )
82 {
83 continue;
84 }
85 if ( !p1touches )
86 {
87 errors.append( new QgsGeometryCheckError( this, layerFeature, p1, QgsVertexId( iPart, 0, 0 ) ) );
88 }
89 if ( !p2touches )
90 {
91 errors.append( new QgsGeometryCheckError( this, layerFeature, p2, QgsVertexId( iPart, 0, nVerts - 1 ) ) );
92 }
93 }
94 }
95}
96
97void QgsGeometryDangleCheck::fixError( const QMap<QString, QgsFeaturePool *> &featurePools, QgsGeometryCheckError *error, int method, const QMap<QString, int> & /*mergeAttributeIndices*/, Changes & /*changes*/ ) const
98{
99 Q_UNUSED( featurePools )
100
101 if ( method == NoChange )
102 {
103 error->setFixed( method );
104 }
105 else
106 {
107 error->setFixFailed( tr( "Unknown method" ) );
108 }
109}
110
112{
113 static const QStringList methods = QStringList() << tr( "No action" );
114 return methods;
115}
116
118{
120}
Abstract base class for all geometries.
virtual int vertexCount(int part=0, int ring=0) const =0
Returns the number of vertices of which this geometry is built.
virtual QgsPoint vertexAt(QgsVertexId id) const =0
Returns the point corresponding to a specified vertex id.
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 bool pointOnLine(const QgsPoint &p, const QgsLineString *line, double tol, bool excludeExtremities=false)
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