QGIS API Documentation 3.29.0-Master (694ebda27c)
qgsvectorlayerrenderer.h
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1/***************************************************************************
2 qgsvectorlayerrenderer.h
3 --------------------------------------
4 Date : December 2013
5 Copyright : (C) 2013 by Martin Dobias
6 Email : wonder dot sk at gmail dot com
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
16#ifndef QGSVECTORLAYERRENDERER_H
17#define QGSVECTORLAYERRENDERER_H
18
21class QgsVectorLayer;
23
26
30
31#define SIP_NO_FILE
32
33#include <QList>
34#include <QPainter>
35#include <QElapsedTimer>
36
37typedef QList<int> QgsAttributeList;
38
39#include "qgis_sip.h"
40#include "qgsfields.h" // QgsFields
41#include "qgsfeatureiterator.h"
43#include "qgsfeedback.h"
44#include "qgsfeatureid.h"
45
46#include "qgsmaplayerrenderer.h"
47
50
59{
60 public:
63 QgsFeedback *feedback() const override;
64 bool forceRasterRender() const override;
65
72
73 bool render() override;
74
75 void setLayerRenderingTimeHint( int time ) override;
76
77 private:
78
84 void prepareLabeling( QgsVectorLayer *layer, QSet<QString> &attributeNames );
85 void prepareDiagrams( QgsVectorLayer *layer, QSet<QString> &attributeNames );
86
90 void drawRenderer( QgsFeatureRenderer *renderer, QgsFeatureIterator &fit );
91
95 void drawRendererLevels( QgsFeatureRenderer *renderer, QgsFeatureIterator &fit );
96
98 void stopRenderer( QgsFeatureRenderer *renderer, QgsSingleSymbolRenderer *selRenderer );
99
100
101 bool renderInternal( QgsFeatureRenderer *renderer );
102
103 private:
104
105 std::unique_ptr<QgsFeedback> mFeedback = nullptr;
106
108 QgsVectorLayer *mLayer = nullptr;
109
110 QgsFields mFields; // TODO: use fields from mSource
111
112 QgsFeatureIds mSelectedFeatureIds;
113
114 QString mTemporalFilter;
115
116 std::unique_ptr< QgsVectorLayerFeatureSource > mSource;
117
118 QgsFeatureRenderer *mRenderer = nullptr;
119 std::vector< std::unique_ptr< QgsFeatureRenderer> > mRenderers;
120
121 bool mDrawVertexMarkers;
122 bool mVertexMarkerOnlyForSelection;
124 double mVertexMarkerSize = 2.0;
125
126 QgsWkbTypes::GeometryType mGeometryType;
127
128 QSet<QString> mAttrNames;
129
134 QgsVectorLayerLabelProvider *mLabelProvider = nullptr;
135
140 QgsVectorLayerDiagramProvider *mDiagramProvider = nullptr;
141
142 QPainter::CompositionMode mFeatureBlendMode;
143
144 QgsVectorSimplifyMethod mSimplifyMethod;
145 bool mSimplifyGeometry;
146
147 QList< QgsMapClippingRegion > mClippingRegions;
148 QgsGeometry mClipFilterGeom;
149 bool mApplyClipFilter = false;
150 QgsGeometry mClipFeatureGeom;
151 bool mApplyClipGeometries = false;
152 QgsGeometry mLabelClipFeatureGeom;
153 bool mApplyLabelClipGeometries = false;
154 bool mForceRasterRender = false;
155
156 int mRenderTimeHint = 0;
157 bool mBlockRenderUpdates = false;
158 QElapsedTimer mElapsedTimer;
159
160 bool mNoSetLayerExpressionContext = false;
161
162};
163
164
165#endif // QGSVECTORLAYERRENDERER_H
VertexMarkerType
Editing vertex markers, used for showing vertices during a edit operation.
Definition: qgis.h:931
@ SemiTransparentCircle
Semi-transparent circle marker.
Stores the settings for rendering of all diagrams for a layer.
Evaluates and returns the diagram settings relating to a diagram for a specific feature.
Wrapper for iterator of features from vector data provider or vector layer.
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:45
Container of fields for a vector layer.
Definition: qgsfields.h:45
A geometry is the spatial representation of a feature.
Definition: qgsgeometry.h:164
A map clipping region (in map coordinates and CRS).
Base class for utility classes that encapsulate information necessary for rendering of map layers.
Contains information about the context of a rendering operation.
The QgsVectorLayerDiagramProvider class implements support for diagrams within the labeling engine.
Partial snapshot of vector layer's state (only the members necessary for access to features)
The QgsVectorLayerLabelProvider class implements a label provider for vector layers.
Implementation of threaded rendering for vector layers.
bool forceRasterRender() const override
Returns true if the renderer must be rendered to a raster paint device (e.g.
QgsVectorLayerRenderer(QgsVectorLayer *layer, QgsRenderContext &context)
~QgsVectorLayerRenderer() override
void setLayerRenderingTimeHint(int time) override
Sets approximate render time (in ms) for the layer to render.
bool render() override
Do the rendering (based on data stored in the class).
QgsFeatureRenderer * featureRenderer()
Returns the feature renderer.
QgsFeedback * feedback() const override
Access to feedback object of the layer renderer (may be nullptr)
Represents a vector layer which manages a vector based data sets.
This class contains information how to simplify geometries fetched from a vector layer.
GeometryType
The geometry types are used to group QgsWkbTypes::Type in a coarse way.
Definition: qgswkbtypes.h:141
#define SIP_SKIP
Definition: qgis_sip.h:126
QSet< QgsFeatureId > QgsFeatureIds
Definition: qgsfeatureid.h:37
QList< int > QgsAttributeList