QT-模态对话框

mainwidow.h:

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

class MainWindow : public QMainWindow

{

    Q_OBJECT

public:

    MainWindow(QWidget *parent = 0);

    ~MainWindow();

private slots:

    void setting();

private:

    QAction *setAction;

};

#endif // MAINWINDOW_H

mainwindow.cpp:

#include "mainwindow.h"

#include<QMenuBar>

#include<QToolBar>

#include<QStatusBar>

#include<QAction>

#include "mydialog.h"

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

{

setAction = new QAction(QIcon(":open.jpg"),tr("选项"),this);

setAction->setStatusTip(tr("环境设定"));

connect(setAction,&QAction::triggered,this,&MainWindow::setting);

QMenu *tool=menuBar()->addMenu(tr("工具"));

tool->addAction(setAction);

QToolBar *toolbar=addToolBar(tr("工具"));

toolbar->addAction(setAction);

QStatusBar *status = statusBar();

status->addAction(setAction);

resize(300,200);

}

MainWindow::~MainWindow()

{

}

void MainWindow::setting()

{

myDialog *dialog= new myDialog(this);

dialog->show();

}