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qgsclassificationwidgetwrapper.cpp
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1 /***************************************************************************
2  qgsclassificationwidgetwrapper.cpp
3  --------------------------------------
4  Date : 5.1.2014
5  Copyright : (C) 2014 Matthias Kuhn
6  Email : matthias dot kuhn at gmx 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 
21 QgsClassificationWidgetWrapper::QgsClassificationWidgetWrapper( QgsVectorLayer* vl, int fieldIdx, QWidget* editor, QWidget* parent )
22  : QgsEditorWidgetWrapper( vl, fieldIdx, editor, parent )
23 {
24 }
25 
27 {
28  return mComboBox->itemData( mComboBox->currentIndex() );
29 }
30 
32 {
33  return new QComboBox( parent );
34 }
35 
37 {
38  mComboBox = qobject_cast<QComboBox*>( editor );
39 
40  if ( mComboBox )
41  {
42  const QgsCategorizedSymbolRendererV2 *csr = dynamic_cast<const QgsCategorizedSymbolRendererV2 *>( layer()->rendererV2() );
43  if ( csr )
44  {
45  const QgsCategoryList categories = csr->categories();
46  for ( int i = 0; i < categories.size(); i++ )
47  {
48  QString label = categories[i].label();
49  QString value = categories[i].value().toString();
50  if ( label.isEmpty() )
51  label = value;
52 
53  mComboBox->addItem( label, value );
54  }
55  }
56 
57  connect( mComboBox, SIGNAL( currentIndexChanged( int ) ), this, SLOT( valueChanged() ) );
58  }
59 }
60 
61 void QgsClassificationWidgetWrapper::setValue( const QVariant& value )
62 {
63  mComboBox->setCurrentIndex( mComboBox->findData( value ) );
64 }
QgsFeatureRendererV2 * rendererV2()
Return renderer V2.
const QgsCategoryList & categories() const
void valueChanged()
Will call the value() method to determine the emitted value.
Manages an editor widget Widget and wrapper share the same parent.
QgsVectorLayer * layer()
Access the QgsVectorLayer, you are working on.
QList< QgsRendererCategoryV2 > QgsCategoryList
QgsClassificationWidgetWrapper(QgsVectorLayer *vl, int fieldIdx, QWidget *editor=0, QWidget *parent=0)
void initWidget(QWidget *editor)
This method should initialize the editor widget with runtime data.
QVariant value()
Will be used to access the widget's value.
QWidget * createWidget(QWidget *parent)
This method should create a new widget with the provided parent.
Represents a vector layer which manages a vector based data sets.