Qt/ModelView/ComboBoxOfCheckBoxes

demo.cpp

#include <QApplication>
 
#include "main.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MainWindow window;
    window.show();
    return app.exec();
}

main.h

#ifndef MainWindow_H
#define MainWindow_H
 
#include <QMainWindow>
#include <QStandardItemModel>
 
#include "ui_main.h"
 
class MainWindow : public QMainWindow, public Ui::MainWindow
{
Q_OBJECT
 
public:
  MainWindow(QMainWindow *parent = 0);
 
public slots:
 
  //void slot_changed();
  void slot_changed(const QModelIndex&, const QModelIndex&);
 
protected:
  QStandardItemModel* Model;
  QStandardItem* Item1;
  QStandardItem* Item2;
 
  std::vector<QStandardItem*> Items;
};
 
#endif

main.cpp

#include <QtGui>
 
#include <iostream>
 
#include "main.h"
 
MainWindow::MainWindow(QMainWindow* parent) : QMainWindow(parent)
{
  setupUi(this);
  this->Model = new QStandardItemModel;
  this->Item1 = new QStandardItem;
 
  this->Item1->setText("test");
  this->Item1->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
  this->Item1->setData(Qt::Unchecked, Qt::CheckStateRole);
 
  this->Item2 = new QStandardItem;
  this->Item2->setText("test2");
  this->Item2->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
  this->Item2->setData(Qt::Unchecked, Qt::CheckStateRole);
 
  connect(this->Model, SIGNAL(dataChanged ( const QModelIndex&, const QModelIndex&)), this, SLOT(slot_changed(const QModelIndex&, const QModelIndex&)));
 
  this->Model->insertRow(0, this->Item1);
  this->Model->insertRow(1, this->Item2);
 
  this->Items.push_back(this->Item1);
  this->Items.push_back(this->Item2);
 
  this->comboBox->setModel(this->Model);
 
  std::cout << comboBox->model()->rowCount() << " rows after." << std::endl;
}
 
void MainWindow::slot_changed(const QModelIndex& topLeft, const QModelIndex& bottomRight)
{
  //std::cout << "topLeft: " << topLeft.row() << std::endl;
  //std::cout << "bottomRight: " << bottomRight.row() << std::endl;
  std::cout << "Item " << topLeft.row() << " " << std::endl;
  QStandardItem* item = this->Items[topLeft.row()];
  if(item->checkState() == Qt::Unchecked)
    {
    std::cout << "Unchecked!" << std::endl;
    }
  else if(item->checkState() == Qt::Checked)
    {
    std::cout << "Checked!" << std::endl;
    }
 
}

main.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>800</width>
    <height>600</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <widget class="QComboBox" name="comboBox">
    <property name="geometry">
     <rect>
      <x>240</x>
      <y>150</y>
      <width>211</width>
      <height>27</height>
     </rect>
    </property>
    <item>
     <property name="text">
      <string>Item1</string>
     </property>
    </item>
    <item>
     <property name="text">
      <string>Item2</string>
     </property>
    </item>
   </widget>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>800</width>
     <height>25</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

CMakeLists.txt

cmake_minimum_required(VERSION 2.6)
 
PROJECT(ComboBoxOfCheckBoxes)
 
FIND_PACKAGE(Qt4 REQUIRED)
INCLUDE(${QT_USE_FILE})
 
include_directories(${include_directories} ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
 
QT4_WRAP_UI(UISrcs main.ui)
QT4_WRAP_CPP(MOCSrcs main.h)
 
ADD_EXECUTABLE(ComboBoxOfCheckBoxes demo.cpp main.h main.cpp ${MOCSrcs} ${UISrcs})
TARGET_LINK_LIBRARIES(ComboBoxOfCheckBoxes ${QT_LIBRARIES})