QGIS API Documentation  3.2.0-Bonn (bc43194)
qgsrelationreferencewidgetwrapper.h
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1 /***************************************************************************
2  qgsrelationreferencewidgetwrapper.h
3  --------------------------------------
4  Date : 20.4.2013
5  Copyright : (C) 2013 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 QGSRELATIONREFERENCEWIDGETWRAPPER_H
17 #define QGSRELATIONREFERENCEWIDGETWRAPPER_H
18 
19 #include "qgseditorwidgetwrapper.h"
20 #include "qgis.h"
21 #include "qgis_gui.h"
22 
24 class QgsMapCanvas;
25 class QgsMessageBar;
26 
44 {
45  Q_OBJECT
46  public:
47 
50  int fieldIdx,
51  QWidget *editor,
52  QgsMapCanvas *canvas,
53  QgsMessageBar *messageBar,
54  QWidget *parent SIP_TRANSFERTHIS = nullptr );
55 
56  QWidget *createWidget( QWidget *parent ) override;
57  void initWidget( QWidget *editor ) override;
58  QVariant value() const override;
59  bool valid() const override;
60  void showIndeterminateState() override;
61 
62  public slots:
63  void setValue( const QVariant &value ) override;
64  void setEnabled( bool enabled ) override;
65 
66  private slots:
67  void foreignKeyChanged( QVariant value );
68 
69  protected:
70 
71  void updateConstraintWidgetStatus() override;
72 
73  private:
74  QgsRelationReferenceWidget *mWidget = nullptr;
75  QgsMapCanvas *mCanvas = nullptr;
76  QgsMessageBar *mMessageBar = nullptr;
77  bool mIndeterminateState;
78 };
79 
80 #endif // QGSRELATIONREFERENCEWIDGETWRAPPER_H
#define SIP_TRANSFERTHIS
Definition: qgis_sip.h:46
Manages an editor widget Widget and wrapper share the same parent.
A bar for displaying non-blocking messages to the user.
Definition: qgsmessagebar.h:45
virtual void updateConstraintWidgetStatus()
This should update the widget with a visual cue if a constraint status changed.
void setEnabled(bool enabled) override
Is used to enable or disable the edit functionality of the managed widget.
Map canvas is a class for displaying all GIS data types on a canvas.
Definition: qgsmapcanvas.h:74
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.
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.
virtual QVariant value() const =0
Will be used to access the widget's value.
Represents a vector layer which manages a vector based data sets.