QGIS API Documentation 3.27.0-Master (95e00c50d2)
qgsgeometrydegeneratepolygoncheck.cpp
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1/***************************************************************************
2 qgsgeometrydegeneratepolygoncheck.cpp
3 ---------------------
4 begin : September 2015
5 copyright : (C) 2014 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 "qgsfeaturepool.h"
20
21
22void QgsGeometryDegeneratePolygonCheck::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 layerFeatures( featurePools, featureIds, compatibleGeometryTypes(), feedback, mContext );
28 for ( const QgsGeometryCheckerUtils::LayerFeature &layerFeature : layerFeatures )
29 {
30 const QgsAbstractGeometry *geom = layerFeature.geometry().constGet();
31 for ( int iPart = 0, nParts = geom->partCount(); iPart < nParts; ++iPart )
32 {
33 for ( int iRing = 0, nRings = geom->ringCount( iPart ); iRing < nRings; ++iRing )
34 {
35 if ( QgsGeometryCheckerUtils::polyLineSize( geom, iPart, iRing ) < 3 )
36 {
37 const QgsVertexId vidx( iPart, iRing );
38 errors.append( new QgsGeometryCheckError( this, layerFeature, geom->vertexAt( vidx ), vidx ) );
39 }
40 }
41 }
42 }
43}
44
45void QgsGeometryDegeneratePolygonCheck::fixError( const QMap<QString, QgsFeaturePool *> &featurePools, QgsGeometryCheckError *error, int method, const QMap<QString, int> & /*mergeAttributeIndices*/, Changes &changes ) const
46{
47 QgsFeaturePool *featurePool = featurePools[ error->layerId() ];
48 QgsFeature feature;
49 if ( !featurePool->getFeature( error->featureId(), feature ) )
50 {
51 error->setObsolete();
52 return;
53 }
54 const QgsGeometry featureGeometry = feature.geometry();
55 const QgsAbstractGeometry *geom = featureGeometry.constGet();
56 const QgsVertexId vidx = error->vidx();
57
58 // Check if ring still exists
59 if ( !vidx.isValid( geom ) )
60 {
61 error->setObsolete();
62 return;
63 }
64
65 // Check if error still applies
66 if ( QgsGeometryCheckerUtils::polyLineSize( geom, vidx.part, vidx.ring ) >= 3 )
67 {
68 error->setObsolete();
69 return;
70 }
71
72 // Fix error
73 if ( method == NoChange )
74 {
75 error->setFixed( method );
76 }
77 else if ( method == DeleteRing )
78 {
79 deleteFeatureGeometryRing( featurePools, error->layerId(), feature, vidx.part, vidx.ring, changes );
80 error->setFixed( method );
81 }
82 else
83 {
84 error->setFixFailed( tr( "Unknown method" ) );
85 }
86}
87
89{
90 static const QStringList methods = QStringList() << tr( "Delete feature" ) << tr( "No action" );
91 return methods;
92}
93
95{
97}
Abstract base class for all geometries.
virtual int ringCount(int part=0) const =0
Returns the number of rings 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.
A feature pool is based on a vector layer and caches features.
bool getFeature(QgsFeatureId id, QgsFeature &feature)
Retrieves the feature with the specified id into feature.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition: qgsfeature.h:56
QgsGeometry geometry
Definition: qgsfeature.h:67
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:45
This represents an error reported by a geometry check.
const QgsVertexId & vidx() const
The id of the affected vertex.
QgsFeatureId featureId() const
The id of the feature on which this error has been detected.
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.
void setObsolete()
Set the error status to obsolete.
const QString & layerId() const
The id of the layer on which this error has been detected.
QMap< QString, QMap< QgsFeatureId, QList< QgsGeometryCheck::Change > > > Changes
A collection of changes.
void deleteFeatureGeometryRing(const QMap< QString, QgsFeaturePool * > &featurePools, const QString &layerId, QgsFeature &feature, int partIdx, int ringIdx, Changes &changes) const
Deletes a ring in a feature geometry.
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 int polyLineSize(const QgsAbstractGeometry *geom, int iPart, int iRing, bool *isClosed=nullptr)
Returns the number of points in a polyline, accounting for duplicate start and end point if the polyl...
void collectErrors(const QMap< QString, QgsFeaturePool * > &featurePools, QList< QgsGeometryCheckError * > &errors, QStringList &messages, QgsFeedback *feedback, const LayerFeatureIds &ids=LayerFeatureIds()) const override
The main worker method.
Q_DECL_DEPRECATED QStringList resolutionMethods() const override
Returns a list of descriptions for available resolutions for errors.
static QgsGeometryCheck::CheckType factoryCheckType()
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.
A geometry is the spatial representation of a feature.
Definition: qgsgeometry.h:164
const QgsAbstractGeometry * constGet() const SIP_HOLDGIL
Returns a non-modifiable (const) reference to the underlying abstract geometry primitive.
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
int part
Part number.
Definition: qgsvertexid.h:89
int ring
Ring number.
Definition: qgsvertexid.h:92
bool isValid() const SIP_HOLDGIL
Returns true if the vertex id is valid.
Definition: qgsvertexid.h:46