QGIS API Documentation  3.16.0-Hannover (43b64b13f3)
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 
68  explicit QgsValueRelationWidgetWrapper( QgsVectorLayer *layer, int fieldIdx, QWidget *editor = nullptr, QWidget *parent = nullptr );
69 
70  QVariant value() const override;
71 
72  void showIndeterminateState() override;
73 
74  void setEnabled( bool enabled ) override;
75 
76  public slots:
77 
78  void parentFormValueChanged( const QString &attribute, const QVariant &value ) override;
79 
80  protected:
81  QWidget *createWidget( QWidget *parent ) override;
82  void initWidget( QWidget *editor ) override;
83  bool valid() const override;
84 
97  void widgetValueChanged( const QString &attribute, const QVariant &newValue, bool attributeChanged );
98 
107  void setFeature( const QgsFeature &feature ) override;
108 
109  private slots:
110  void emitValueChangedInternal( const QString &value );
111 
112  private:
113  void updateValues( const QVariant &value, const QVariantList & = QVariantList() ) override;
114 
115 
120  int columnCount() const;
121 
123  QVariant::Type fkType() const;
124 
126  void populate( );
127 
128  QComboBox *mComboBox = nullptr;
129  QTableWidget *mTableWidget = nullptr;
130  QLineEdit *mLineEdit = nullptr;
131 
133  QgsVectorLayer *mLayer = nullptr;
134 
135  bool mEnabled = true;
136  QString mExpression;
137 
139  friend class TestQgsValueRelationWidgetWrapper;
140 
141 };
142 
143 #endif // QGSVALUERELATIONWIDGETWRAPPER_H
qgseditorwidgetwrapper.h
QgsWidgetWrapper::initWidget
virtual void initWidget(QWidget *editor)
This method should initialize the editor widget with runtime data.
Definition: qgswidgetwrapper.cpp:106
qgsvaluerelationfieldformatter.h
QgsWidgetWrapper::valid
virtual bool valid() const =0
Returns true if the widget has been properly initialized.
QgsValueRelationWidgetWrapper
Wraps a value relation widget.
Definition: qgsvaluerelationwidgetwrapper.h:53
QgsEditorWidgetWrapper::value
virtual QVariant value() const =0
Will be used to access the widget's value.
QgsEditorWidgetWrapper
Manages an editor widget Widget and wrapper share the same parent.
Definition: qgseditorwidgetwrapper.h:48
QgsEditorWidgetWrapper::parentFormValueChanged
virtual void parentFormValueChanged(const QString &attribute, const QVariant &value)
Is called in embedded form widgets when an attribute value in the parent form has changed.
Definition: qgseditorwidgetwrapper.cpp:99
QgsValueRelationWidgetFactory
Definition: qgsvaluerelationwidgetfactory.h:33
QgsValueRelationFieldFormatter::ValueRelationCache
QVector< QgsValueRelationFieldFormatter::ValueRelationItem > ValueRelationCache
Definition: qgsvaluerelationfieldformatter.h:56
QgsVectorLayer
Represents a vector layer which manages a vector based data sets.
Definition: qgsvectorlayer.h:387
QgsEditorWidgetWrapper::setEnabled
void setEnabled(bool enabled) override
Is used to enable or disable the edit functionality of the managed widget.
Definition: qgseditorwidgetwrapper.cpp:60
SIP_NO_FILE
#define SIP_NO_FILE
Definition: qgis_sip.h:23
QgsFeature
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Definition: qgsfeature.h:56
QgsEditorWidgetWrapper::setFeature
void setFeature(const QgsFeature &feature) override
Will be called when the feature changes.
Definition: qgseditorwidgetwrapper.cpp:69
QgsWidgetWrapper::createWidget
virtual QWidget * createWidget(QWidget *parent)=0
This method should create a new widget with the provided parent.
QgsEditorWidgetWrapper::showIndeterminateState
virtual void showIndeterminateState()
Sets the widget to display in an indeterminate "mixed value" state.
Definition: qgseditorwidgetwrapper.h:155