QGIS API Documentation  3.21.0-Master (5b68dc587e)
qgsqmlwidgetwrapper.h
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1 /***************************************************************************
2  qgsqmlwidgetwrapper.h
3 
4  ---------------------
5  begin : 25.6.2018
6  copyright : (C) 2018 by Matthias Kuhn
7  email : [email protected]
8  ***************************************************************************
9  * *
10  * This program is free software; you can redistribute it and/or modify *
11  * it under the terms of the GNU General Public License as published by *
12  * the Free Software Foundation; either version 2 of the License, or *
13  * (at your option) any later version. *
14  * *
15  ***************************************************************************/
16 #ifndef QGSQMLWIDGETWRAPPER_H
17 #define QGSQMLWIDGETWRAPPER_H
18 
19 #include "qgswidgetwrapper.h"
20 #include "qgis_sip.h"
21 #include "qgis_gui.h"
22 #include <QtQuickWidgets/QQuickWidget>
23 
29 class GUI_EXPORT QgsQmlWidgetWrapper : public QgsWidgetWrapper
30 {
31  Q_OBJECT
32 
33  public:
34 
42  QgsQmlWidgetWrapper( QgsVectorLayer *layer, QWidget *editor, QWidget *parent );
43 
44  bool valid() const override;
45 
46  QWidget *createWidget( QWidget *parent ) override;
47 
48  void initWidget( QWidget *editor ) override;
49 
51  void reinitWidget();
52 
54  void setQmlCode( const QString &qmlCode );
55 
56  public slots:
57  void setFeature( const QgsFeature &feature ) override;
58 
59  private slots:
61  void setQmlContext();
62 
63  private:
64  QTemporaryFile mQmlFile;
65  QQuickWidget *mWidget = nullptr;
66  QgsFeature mFeature;
67 };
68 
69 
70 #ifndef SIP_RUN
72 
78 class QmlExpression : public QObject
79 {
80  Q_OBJECT
81 
82  public:
84  void setExpressionContext( const QgsExpressionContext &context );
85 
87  Q_INVOKABLE QVariant evaluate( const QString &expression ) const;
88 
89  private:
90  QgsExpressionContext mExpressionContext;
91 };
93 #endif //SIP_RUN
94 
95 #endif // QGSQMLWIDGETWRAPPER_H
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition: qgsfeature.h:56
Wraps a QQuickWidget to display QML code.
Represents a vector layer which manages a vector based data sets.
Manages an editor widget Widget and wrapper share the same parent.
virtual void setFeature(const QgsFeature &feature)=0
Is called when the value of the widget needs to be changed.
virtual bool valid() const =0
Returns true if the widget has been properly initialized.
virtual void initWidget(QWidget *editor)
This method should initialize the editor widget with runtime data.
virtual QWidget * createWidget(QWidget *parent)=0
This method should create a new widget with the provided parent.