QT小练习

头文件:mainwindow.h

 

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

#include <QFileDialog>

#include <QFileInfo>

#include <QDateTime>

#include <QString>

namespace Ui {

class MainWindow;

}

class MainWindow : public QMainWindow

{

    Q_OBJECT

public:

    explicit MainWindow(QWidget *parent = 0);

    ~MainWindow();

private:

    Ui::MainWindow *ui;

private slots:

    void openFileSlot();

};

#endif // MAINWINDOW_H

main.cpp:

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

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    QObject::connect(ui->openFileButton,SIGNAL(clicked()),this,SLOT(openFileSlot()));
}
MainWindow::~MainWindow()
{
    delete ui;
}
void MainWindow::openFileSlot()
{
   QString  fileName=QFileDialog::getOpenFileName(this, tr("Open File"),
                                                  "/home");
   QFileInfo   info(fileName);
   ui->fileSizelineEdit->setText(QString::number(info.size()));
   QDateTime create=info.created();
   ui->createTimelineEdit->setText(create.toString("yyyy-MM-dd"));
   QDateTime lastRead=info.lastRead();
   ui->lastReadlineEdit->setText(lastRead.toString("yyyy-MM-dd"));
   if(info.isDir())
       ui->isDir->setText(QString::fromLocal8Bit("是"));
   else
       ui->isDir->setText(QString::fromLocal8Bit("不是"));
}