QGIS API Documentation  3.2.0-Bonn (bc43194)
qgsvaluerelationwidgetwrapper.h
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1 /***************************************************************************
2  qgsvaluerelationwidgetwrapper.h
3  --------------------------------------
4  Date : 5.1.2014
5  Copyright : (C) 2014 Matthias Kuhn
6  Email : matthias at opengis dot ch
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 QGSVALUERELATIONWIDGETWRAPPER_H
17 #define QGSVALUERELATIONWIDGETWRAPPER_H
18 
19 #include "qgseditorwidgetwrapper.h"
21 #include "qgis_gui.h"
22 
23 class QTableWidget;
24 class QComboBox;
25 class QLineEdit;
26 
28 
30 
53 {
54  Q_OBJECT
55 
56  public:
57  explicit QgsValueRelationWidgetWrapper( QgsVectorLayer *vl, int fieldIdx, QWidget *editor = nullptr, QWidget *parent = nullptr );
58 
59  QVariant value() const override;
60 
61  void showIndeterminateState() override;
62 
63  void setEnabled( bool enabled ) override;
64 
65  protected:
66  QWidget *createWidget( QWidget *parent ) override;
67  void initWidget( QWidget *editor ) override;
68  bool valid() const override;
69 
70  public slots:
71 
72  void setValue( const QVariant &value ) override;
73 
86  void widgetValueChanged( const QString &attribute, const QVariant &newValue, bool attributeChanged );
87 
96  void setFeature( const QgsFeature &feature ) override;
97 
98 
99  private:
100 
105  int columnCount() const;
106 
108  void populate( );
109 
110  QComboBox *mComboBox = nullptr;
111  QTableWidget *mTableWidget = nullptr;
112  QLineEdit *mLineEdit = nullptr;
113 
115  QgsVectorLayer *mLayer = nullptr;
116 
117  bool mEnabled = true;
118  QString mExpression;
119 
121  friend class TestQgsValueRelationWidgetWrapper;
122 };
123 
124 #endif // QGSVALUERELATIONWIDGETWRAPPER_H
Manages an editor widget Widget and wrapper share the same parent.
void setEnabled(bool enabled) override
Is used to enable or disable the edit functionality of the managed widget.
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Definition: qgsfeature.h:62
QVector< QgsValueRelationFieldFormatter::ValueRelationItem > ValueRelationCache
Wraps a value relation widget.
virtual void showIndeterminateState()
Sets the widget to display in an indeterminate "mixed value" state.
virtual bool valid() const =0
Returns true if the widget has been properly initialized.
void setFeature(const QgsFeature &feature) override
Will be called when the feature changes.
virtual QWidget * createWidget(QWidget *parent)=0
This method should create a new widget with the provided parent.
virtual void initWidget(QWidget *editor)
This method should initialize the editor widget with runtime data.
virtual void setValue(const QVariant &value)=0
Is called, when the value of the widget needs to be changed.
#define SIP_NO_FILE
Definition: qgis_sip.h:23
virtual QVariant value() const =0
Will be used to access the widget&#39;s value.
Represents a vector layer which manages a vector based data sets.