QGIS API Documentation  2.11.0-Master
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Properties Friends Macros Groups Pages
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 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 
22  : QgsEditorWidgetWrapper( vl, fieldIdx, editor, parent )
23  , mComboBox( NULL )
24 {
25 }
26 
28 {
29  return mComboBox->itemData( mComboBox->currentIndex() );
30 }
31 
33 {
34  return new QComboBox( parent );
35 }
36 
38 {
39  mComboBox = qobject_cast<QComboBox*>( editor );
40 
41  if ( mComboBox )
42  {
43  const QgsCategorizedSymbolRendererV2 *csr = dynamic_cast<const QgsCategorizedSymbolRendererV2 *>( layer()->rendererV2() );
44  if ( csr )
45  {
46  const QgsCategoryList categories = csr->categories();
47  for ( int i = 0; i < categories.size(); i++ )
48  {
49  QString label = categories[i].label();
50  QString value = categories[i].value().toString();
51  if ( label.isEmpty() )
52  label = value;
53 
54  mComboBox->addItem( label, value );
55  }
56  }
57 
58  connect( mComboBox, SIGNAL( currentIndexChanged( int ) ), this, SLOT( valueChanged() ) );
59  }
60 }
61 
63 {
64  return mComboBox;
65 }
66 
68 {
69  mComboBox->setCurrentIndex( mComboBox->findData( value ) );
70 }
QgsFeatureRendererV2 * rendererV2()
Return renderer V2.
const QgsCategoryList & categories() const
void valueChanged()
Will call the value() method to determine the emitted value.
QWidget * createWidget(QWidget *parent) override
This method should create a new widget with the provided parent.
Manages an editor widget Widget and wrapper share the same parent.
QgsVectorLayer * layer()
Access the QgsVectorLayer, you are working on.
int size() const
T value(int i) const
void initWidget(QWidget *editor) override
This method should initialize the editor widget with runtime data.
void addItem(const QString &text, const QVariant &userData)
QgsClassificationWidgetWrapper(QgsVectorLayer *vl, int fieldIdx, QWidget *editor=0, QWidget *parent=0)
bool isEmpty() const
QVariant value() override
Will be used to access the widget's value.
QVariant itemData(int index, int role) const
bool valid() override
Return true if the widget has been properly initialized.
int findData(const QVariant &data, int role, QFlags< Qt::MatchFlag > flags) const
void setValue(const QVariant &value) override
bool connect(const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
Represents a vector layer which manages a vector based data sets.