QGIS API Documentation 3.27.0-Master (0a97e3138f)
qgsclassificationwidgetwrapper.cpp
Go to the documentation of this file.
1/***************************************************************************
2 qgsclassificationwidgetwrapper.cpp
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
17
19#include "qgsvectorlayer.h"
20
21QgsClassificationWidgetWrapper::QgsClassificationWidgetWrapper( QgsVectorLayer *layer, int fieldIdx, QWidget *editor, QWidget *parent )
22 : QgsEditorWidgetWrapper( layer, fieldIdx, editor, parent )
23
24{
25}
26
28{
29 return mComboBox->currentData();
30}
31
33{
34 whileBlocking( mComboBox )->setCurrentIndex( -1 );
35}
36
38{
39 return new QComboBox( parent );
40}
41
43{
44 mComboBox = qobject_cast<QComboBox *>( editor );
45
46 if ( mComboBox )
47 {
48 const QgsCategorizedSymbolRenderer *csr = dynamic_cast<const QgsCategorizedSymbolRenderer *>( layer()->renderer() );
49 if ( csr )
50 {
51 const QgsCategoryList categories = csr->categories();
52 for ( int i = 0; i < categories.size(); i++ )
53 {
54 QString label = categories[i].label();
55 const QString value = categories[i].value().toString();
56 if ( label.isEmpty() )
57 label = value;
58
59 mComboBox->addItem( label, value );
60 }
61 }
62
63 connect( mComboBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ),
64 this, static_cast<void ( QgsEditorWidgetWrapper::* )()>( &QgsEditorWidgetWrapper::emitValueChanged ) );
65 }
66}
67
69{
70 return mComboBox;
71}
72
73void QgsClassificationWidgetWrapper::updateValues( const QVariant &value, const QVariantList & )
74{
75 mComboBox->setCurrentIndex( mComboBox->findData( value ) );
76}
const QgsCategoryList & categories() const
Returns a list of all categories recognized by the renderer.
QWidget * createWidget(QWidget *parent) override
This method should create a new widget with the provided parent.
void initWidget(QWidget *editor) override
This method should initialize the editor widget with runtime data.
bool valid() const override
Returns true if the widget has been properly initialized.
QVariant value() const override
Will be used to access the widget's value.
void showIndeterminateState() override
Sets the widget to display in an indeterminate "mixed value" state.
QgsClassificationWidgetWrapper(QgsVectorLayer *layer, int fieldIdx, QWidget *editor=nullptr, QWidget *parent=nullptr)
Constructor for QgsClassificationWidgetWrapper.
Manages an editor widget Widget and wrapper share the same parent.
void emitValueChanged()
Will call the value() method to determine the emitted value.
Represents a vector layer which manages a vector based data sets.
QgsFeatureRenderer * renderer()
Returns the feature renderer used for rendering the features in the layer in 2D map views.
QgsVectorLayer * layer() const
Returns the vector layer associated with the widget.
QgsSignalBlocker< Object > whileBlocking(Object *object)
Temporarily blocks signals from a QObject while calling a single method from the object.
Definition: qgis.h:2330
QList< QgsRendererCategory > QgsCategoryList