QGIS API Documentation 3.39.0-Master (bca3cdb6021)
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qgsvectortilebasiclabeling.h
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1/***************************************************************************
2 qgsvectortilebasiclabeling.h
3 --------------------------------------
4 Date : April 2020
5 Copyright : (C) 2020 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 QGSVECTORTILEBASICLABELING_H
17#define QGSVECTORTILEBASICLABELING_H
18
19
21
22
24
32{
33 public:
34
36 void setLabelSettings( const QgsPalLayerSettings &settings ) { mLabelSettings = settings; }
38 QgsPalLayerSettings labelSettings() const { return mLabelSettings; }
39
41 void setStyleName( const QString &name ) { mStyleName = name; }
43 QString styleName() const { return mStyleName; }
44
46 void setLayerName( const QString &name ) { mLayerName = name; }
48 QString layerName() const { return mLayerName; }
49
51 void setGeometryType( Qgis::GeometryType geomType ) { mGeometryType = geomType; }
53 Qgis::GeometryType geometryType() const { return mGeometryType; }
54
56 void setFilterExpression( const QString &expr ) { mExpression = expr; }
58 QString filterExpression() const { return mExpression; }
59
61 void setEnabled( bool enabled ) { mEnabled = enabled; }
63 bool isEnabled() const { return mEnabled; }
64
74 void setMinZoomLevel( int minZoom ) { mMinZoomLevel = minZoom; }
75
85 int minZoomLevel() const { return mMinZoomLevel; }
86
100 void setMaxZoomLevel( int maxZoom ) { mMaxZoomLevel = maxZoom; }
101
115 int maxZoomLevel() const { return mMaxZoomLevel; }
116
117
119 bool isActive( int zoomLevel ) const
120 {
121 return mEnabled && ( mMinZoomLevel == -1 || zoomLevel >= mMinZoomLevel ) && ( mMaxZoomLevel == -1 || zoomLevel <= mMaxZoomLevel );
122 }
123
125 void writeXml( QDomElement &elem, const QgsReadWriteContext &context ) const;
127 void readXml( const QDomElement &elem, const QgsReadWriteContext &context );
128
129 private:
130 QString mStyleName;
131 QString mLayerName;
132 Qgis::GeometryType mGeometryType;
133 bool mEnabled = true;
134 QString mExpression;
135 int mMinZoomLevel = -1;
136 int mMaxZoomLevel = -1;
137
138 QgsPalLayerSettings mLabelSettings;
139};
140
141
151{
152 public:
154
155 QString type() const override;
156 QgsVectorTileLabeling *clone() const override SIP_FACTORY;
157 QgsVectorTileLabelProvider *provider( QgsVectorTileLayer *layer ) const override SIP_SKIP;
158 void writeXml( QDomElement &elem, const QgsReadWriteContext &context ) const override;
159 void readXml( const QDomElement &elem, const QgsReadWriteContext &context ) override;
160
162 void setStyles( const QList<QgsVectorTileBasicLabelingStyle> &styles ) { mStyles = styles; }
164 QList<QgsVectorTileBasicLabelingStyle> styles() const { return mStyles; }
166 void setStyle( int index, const QgsVectorTileBasicLabelingStyle &style ) { mStyles[index] = style; }
168 QgsVectorTileBasicLabelingStyle style( int index ) const { return mStyles[index]; }
169
170 private:
172 QList<QgsVectorTileBasicLabelingStyle> mStyles;
173};
174
175
176#ifndef SIP_RUN
177
185{
186 public:
188 QgsVectorTileBasicLabelProvider( QgsVectorTileLayer *layer, const QList<QgsVectorTileBasicLabelingStyle> &styles );
189
190 QList<QgsAbstractLabelProvider *> subProviders() override;
191 bool prepare( QgsRenderContext &context, QSet<QString> &attributeNames ) override;
192
193 // virtual functions from QgsVectorTileLabelProvider
194 void registerTileFeatures( const QgsVectorTileRendererData &tile, QgsRenderContext &context ) override;
195 QMap<QString, QSet<QString> > usedAttributes( const QgsRenderContext &context, int tileZoom ) const override;
196 QSet< QString > requiredLayers( QgsRenderContext &context, int tileZoom ) const override;
197 void setFields( const QMap<QString, QgsFields> &perLayerFields ) override;
198
199 private:
200 QList<QgsVectorTileBasicLabelingStyle> mStyles;
201
203 QList<QgsVectorLayerLabelProvider *> mSubProviders;
204
205 public:
207 QMap<QString, QgsFields> mPerLayerFields;
208};
209
210#endif
211
212
213#endif // QGSVECTORTILEBASICLABELING_H
GeometryType
The geometry types are used to group Qgis::WkbType in a coarse way.
Definition qgis.h:337
QgsMapLayer * layer() const
Returns the associated layer, or nullptr if no layer is associated with the provider.
Contains settings for how a map layer will be labeled.
The class is used as a container of context for various read/write operations on other objects.
Contains information about the context of a rendering operation.
Implementation class for QgsVectorTileBasicLabeling.
QMap< QString, QgsFields > mPerLayerFields
Names of required fields for each sub-layer (only valid between startRender/stopRender calls)
bool prepare(QgsRenderContext &context, QSet< QString > &attributeNames) override
Prepare for registration of features.
void setFields(const QMap< QString, QgsFields > &perLayerFields) override
Sets fields for each sub-layer.
void registerTileFeatures(const QgsVectorTileRendererData &tile, QgsRenderContext &context) override
Registers label features for given tile to the labeling engine.
QMap< QString, QSet< QString > > usedAttributes(const QgsRenderContext &context, int tileZoom) const override
Returns field names for each sub-layer that are required for labeling.
QSet< QString > requiredLayers(QgsRenderContext &context, int tileZoom) const override
Returns a list of the layers required for labeling.
QList< QgsAbstractLabelProvider * > subProviders() override
Returns list of child providers - useful if the provider needs to put labels into more layers with di...
Configuration of a single style within QgsVectorTileBasicLabeling.
QgsPalLayerSettings labelSettings() const
Returns labeling configuration of this style.
QString layerName() const
Returns name of the sub-layer to render (empty layer means that all layers match)
void setLayerName(const QString &name)
Sets name of the sub-layer to render (empty layer means that all layers match)
QString filterExpression() const
Returns filter expression (empty filter means that all features match)
void setMinZoomLevel(int minZoom)
Sets minimum zoom level index (negative number means no limit).
int maxZoomLevel() const
Returns the maximum zoom level index (negative number means no limit).
void setFilterExpression(const QString &expr)
Sets filter expression (empty filter means that all features match)
int minZoomLevel() const
Returns the minimum zoom level index (negative number means no limit).
void setMaxZoomLevel(int maxZoom)
Sets maximum zoom level index (negative number means no limit).
void setStyleName(const QString &name)
Sets human readable name of this style.
void setGeometryType(Qgis::GeometryType geomType)
Sets type of the geometry that will be used (point / line / polygon)
bool isActive(int zoomLevel) const
Returns whether the style is active at given zoom level (also checks "enabled" flag)
void setLabelSettings(const QgsPalLayerSettings &settings)
Sets labeling configuration of this style.
Qgis::GeometryType geometryType() const
Returns type of the geometry that will be used (point / line / polygon)
void setEnabled(bool enabled)
Sets whether this style is enabled (used for rendering)
QString styleName() const
Returns human readable name of this style.
bool isEnabled() const
Returns whether this style is enabled (used for rendering)
Basic labeling configuration for vector tile layers.
QList< QgsVectorTileBasicLabelingStyle > styles() const
Returns list of styles of the renderer.
void setStyles(const QList< QgsVectorTileBasicLabelingStyle > &styles)
Sets list of styles of the renderer.
void setStyle(int index, const QgsVectorTileBasicLabelingStyle &style)
Updates style definition at the paricular index of the list (the index must be in interval [0,...
QgsVectorTileBasicLabelingStyle style(int index) const
Returns style definition at the particular index.
Internal base class for implementation of label providers for vector tile labeling.
Base class for labeling configuration classes for vector tile layers.
Implements a map layer that is dedicated to rendering of vector tiles.
Contains decoded features of a single vector tile and any other data necessary for rendering of it.
#define SIP_SKIP
Definition qgis_sip.h:126
#define SIP_FACTORY
Definition qgis_sip.h:76