(C++) QComboBox example 1: use of QStringListModel

QComboBox example 1: use of QStringListModel is an example of how to set a QComboBox its model with a QStringListModel.

Technical facts

Application type(s)

Desktop application

Operating system(s) or programming environment(s)

Lubuntu 13.04 (raring)

IDE(s):

Qt Creator 2.7.0

Project type:

GUI application

C++ standard:

C++98

Compiler(s):

G++ 4.7.3

Libraries used:

Qt: version 4.8.4 (32 bit)
STL: GNU ISO C++ Library, version 4.7.3

Qt project file: CppQComboBoxExample1.pro


#-------------------------------------------------


#


# Project created by QtCreator 2013-05-21T13:27:44


#


#-------------------------------------------------





QT       += core gui





TARGET = CppQComboBoxExample1


TEMPLATE = app








SOURCES += main.cpp\


        qtdialog.cpp





HEADERS  += qtdialog.h





FORMS    += qtdialog.ui

main.cpp


#include <QtGui/QApplication>


#include "qtdialog.h"





int main(int argc, char *argv[])


{


  QApplication a(argc, argv);


  QtDialog w;


  w.show();


  


  return a.exec();


}

qtdialog.h


#ifndef QTDIALOG_H


#define QTDIALOG_H





#include <QDialog>





namespace Ui {


  class QtDialog;


}





class QtDialog : public QDialog


{


  Q_OBJECT


  


public:


  explicit QtDialog(QWidget *parent = 0);


  ~QtDialog();


  


private slots:


  void on_pushButton_clicked();





private:


  Ui::QtDialog *ui;


};





#endif // QTDIALOG_H

qtdialog.cpp


#include "qtdialog.h"





#include <QStringListModel>


#include "ui_qtdialog.h"





QtDialog::QtDialog(QWidget *parent) :


  QDialog(parent),


  ui(new Ui::QtDialog)


{


  ui->setupUi(this);


  ui->pushButton->click();


}





QtDialog::~QtDialog()


{


  delete ui;


}





void QtDialog::on_pushButton_clicked()


{


  QStringList strings;


  if ((std::rand() >> 4) % 2) strings.append("A");


  if ((std::rand() >> 4) % 2) strings.append("B");


  if ((std::rand() >> 4) % 2) strings.append("C");


  if ((std::rand() >> 4) % 2) strings.append("D");





  QStringListModel * const model = new QStringListModel(strings);


  ui->comboBox_1->setModel(model);


  ui->comboBox_2->setModel(model);


  ui->comboBox_3->setModel(model);


  ui->comboBox_4->setModel(model);


}

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