QT 4-6 下拉列表

dialog.h   :

#ifndef DIALOG_H

#define DIALOG_H

#include <QDialog>

#include<QComboBox>

class Dialog : public QDialog

{

    Q_OBJECT

public:

    Dialog(QWidget *parent = 0);

    ~Dialog();

public slots:

    void onChanged(int index);

private:

    QComboBox *comBox;

};

#endif // DIALOG_H

dialog.cpp

#include "dialog.h"

#include<QMessageBox>

Dialog::Dialog(QWidget *parent)

    : QDialog(parent)

{

    comBox =new QComboBox(this);

    comBox->setGeometry(20,20,100,30);

    QIcon icon1(":/ftp.ico");

    comBox->addItem(icon1,"ftp");

    QIcon icon2("/WWW.ico");

    comBox->addItem("WWW");

    comBox->setItemIcon(1,icon2);

    connect(comBox,SIGNAL(currentIndexChanged(int)),this,SLOT(onChanged(int)));

    this->resize(400,300);

    this->setWindowTitle("QComboBox");

   }

Dialog::~Dialog()

{

}

void Dialog::onChanged(int index)

{

    QMessageBox::warning(this,"消息",comBox->itemText(index),QMessageBox::Ok);

}

main.cpp:

#include "dialog.h"

#include <QApplication>

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

{

    QApplication a(argc, argv);

    Dialog w;

    w.show();

    return a.exec();

}