QGIS API Documentation 3.37.0-Master (c2d15952569)
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qgsheatmaprendererwidget.h
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1/***************************************************************************
2 qgsheatmaprendererwidget.h
3 --------------------------
4 begin : November 2014
5 copyright : (C) 2014 Nyall Dawson
6 email : nyall dot dawson 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#ifndef QGSHEATMAPRENDERERWIDGET_H
16#define QGSHEATMAPRENDERERWIDGET_H
17
18#include "ui_qgsheatmaprendererwidgetbase.h"
19#include "qgis_sip.h"
20#include "qgsrendererwidget.h"
21#include "qgis_gui.h"
22
23class QMenu;
25
30class GUI_EXPORT QgsHeatmapRendererWidget : public QgsRendererWidget, private Ui::QgsHeatmapRendererWidgetBase, private QgsExpressionContextGenerator
31{
32 Q_OBJECT
33
34 public:
35
42 static QgsRendererWidget *create( QgsVectorLayer *layer, QgsStyle *style, QgsFeatureRenderer *renderer ) SIP_FACTORY;
43
52
53 QgsFeatureRenderer *renderer() override;
54 void setContext( const QgsSymbolWidgetContext &context ) override;
55
56 private:
57 std::unique_ptr< QgsHeatmapRenderer > mRenderer;
58
60
61 private slots:
62
63 void applyColorRamp();
64 void mRadiusUnitWidget_changed();
65 void mRadiusSpinBox_valueChanged( double d );
66 void mMaxSpinBox_valueChanged( double d );
67 void mQualitySlider_valueChanged( int v );
68 void weightExpressionChanged( const QString &expression );
69
70};
71
72
73#endif // QGSHEATMAPRENDERERWIDGET_H
Abstract interface for generating an expression context.
virtual QgsExpressionContext createExpressionContext() const =0
This method needs to be reimplemented in all classes which implement this interface and return an exp...
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
~QgsHeatmapRendererWidget() override
A renderer which draws points as a live heatmap.
Base class for renderer settings widgets.
virtual void setContext(const QgsSymbolWidgetContext &context)
Sets the context in which the renderer widget is shown, e.g., the associated map canvas and expressio...
virtual QgsFeatureRenderer * renderer()=0
Returns pointer to the renderer (no transfer of ownership)
Contains settings which reflect the context in which a symbol (or renderer) widget is shown,...
Represents a vector layer which manages a vector based data sets.
#define SIP_FACTORY
Definition qgis_sip.h:76