QGIS API Documentation  3.17.0-Master (df2c9ff931)
qgspointclusterrendererwidget.h
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1 /***************************************************************************
2  qgspointclusterrendererwidget.h
3  -------------------------------
4  begin : February 2016
5  copyright : (C) 2016 by Nyall Dawson
6  email : nyall dot dawson at gmail dot com
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #ifndef QGSPOINTCLUSTERRENDERERWIDGET_H
19 #define QGSPOINTCLUSTERRENDERERWIDGET_H
20 
21 #include "ui_qgspointclusterrendererwidgetbase.h"
22 #include "qgis_sip.h"
23 #include "qgsrendererwidget.h"
25 #include "qgis_gui.h"
26 
28 
36 class GUI_EXPORT QgsPointClusterRendererWidget: public QgsRendererWidget, public QgsExpressionContextGenerator, private Ui::QgsPointClusterRendererWidgetBase
37 {
38  Q_OBJECT
39 
40  public:
41 
49  static QgsRendererWidget *create( QgsVectorLayer *layer, QgsStyle *style, QgsFeatureRenderer *renderer ) SIP_FACTORY;
50 
58 
60 
61  QgsFeatureRenderer *renderer() override;
62  void setContext( const QgsSymbolWidgetContext &context ) override;
63 
65 
66  private:
67  QgsPointClusterRenderer *mRenderer = nullptr;
68 
69  void blockAllSignals( bool block );
70  void setupBlankUi( const QString &layerName );
71 
72  private slots:
73 
74  void mRendererComboBox_currentIndexChanged( int index );
75  void mDistanceSpinBox_valueChanged( double d );
76  void mDistanceUnitWidget_changed();
77  void mRendererSettingsButton_clicked();
78  void centerSymbolChanged();
79  void updateRendererFromWidget();
80 };
81 
82 #endif // QGSPOINTCLUSTERRENDERERWIDGET_H
virtual QgsFeatureRenderer * renderer()=0
Returns pointer to the renderer (no transfer of ownership)
virtual void setContext(const QgsSymbolWidgetContext &context)
Sets the context in which the renderer widget is shown, e.g., the associated map canvas and expressio...
A widget which allows configuration of the properties for a QgsPointClusterRenderer.
Base class for renderer settings widgets.
virtual QgsExpressionContext createExpressionContext() const =0
This method needs to be reimplemented in all classes which implement this interface and return an exp...
Contains settings which reflect the context in which a symbol (or renderer) widget is shown...
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
A renderer that automatically clusters points with the same geographic position.
#define SIP_FACTORY
Definition: qgis_sip.h:76
Abstract interface for generating an expression context.
Represents a vector layer which manages a vector based data sets.