Qt——实现一个简单的获取文件信息的dialog

实现效果

选择文件：

获取文件信息：

实现

1.创建项目

新建一个项目，随便起一个项目名FileInfo，让FileInfo继承自 QDialog类。

2.项目布局

• topLayout使用的是 网格布局（QGridLayout），把 属性 标签以上的所有控件都放入其布局中
• centerLayout使用的是 水平布局 （·QHBoxLayout），把几个多选框放入其布局中
• mainLayout使用的是 垂直布局 (QVBoxLayout)，把 topLayout和 centerLayout以及 最后一个获取文件信息的按钮放入到其布局中

3.代码

fileinfo.h：

#ifndef FILEINFO_H
#define FILEINFO_H

#include <QDialog>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QCheckBox>

class FileInfo : public QDialog
{
    Q_OBJECT

public:
    FileInfo(QWidget *parent = nullptr);
    ~FileInfo();

public slots:
    void slotFile();
    void slotGet();

private:
   QLabel * fileLabel;
   QLineEdit * fileLineEdit;
   QPushButton * fileBtn;

   QLabel * sizeLabel;
   QLineEdit * sizeLineEdit;

   QLabel * createdTimeLabel;
   QLineEdit * createdTimeLineEdit;

   QLabel * lastModifiedLabel;
   QLineEdit * lastModifiedLineEdit;

   QLabel * lastVisitLabel;
   QLineEdit * lastVisitLineEdit;

   QLabel * propertyLabel;
   QCheckBox * isDirCheckBox;
   QCheckBox * isFileCheckBox;
   QCheckBox * isSymbolLinkCheckBox;
   QCheckBox * isHiddenCheckBox;
   QCheckBox * isReadCheckBox;
   QCheckBox * isWritaleCheckBox;
   QCheckBox * isExecutableCheckBox;

   QPushButton * getBtn;
};
#endif // FILEINFO_H

fileinfo.cpp:

#include "fileinfo.h"
#include <QGridLayout>
#include <QFileDialog>
#include <QDateTime>

FileInfo::FileInfo(QWidget *parent)
    : QDialog(parent)
{
    fileLabel = new QLabel(tr("文件名:"));
    fileLineEdit = new QLineEdit;
    fileBtn = new QPushButton(tr("文件"));

    sizeLabel = new QLabel(tr("大小:"));
    sizeLineEdit = new QLineEdit;

    createdTimeLabel = new QLabel(tr("创建时间:"));
    createdTimeLineEdit = new QLineEdit;

    lastModifiedLabel = new QLabel(tr("最后修改时间:"));
    lastModifiedLineEdit = new QLineEdit;

    lastVisitLabel = new QLabel(tr("最后访问时间:"));
    lastVisitLineEdit = new QLineEdit;

    propertyLabel = new QLabel(tr("属性:"));

    isDirCheckBox = new QCheckBox(tr("目录"));
    isFileCheckBox = new QCheckBox(tr("文件"));
    isSymbolLinkCheckBox = new QCheckBox(tr("符号链接"));
    isHiddenCheckBox = new QCheckBox(tr("隐藏"));
    isReadCheckBox = new QCheckBox(tr("读"));
    isWritaleCheckBox = new QCheckBox(tr("写"));
    isExecutableCheckBox = new QCheckBox(tr("执行"));

    getBtn = new QPushButton(tr("获取文件信息"));


    //top
    QGridLayout * topLayout = new QGridLayout;
    topLayout->addWidget(fileLabel,0,0);
    topLayout->addWidget(fileLineEdit,0,1);
    topLayout->addWidget(fileBtn,0,2);

    topLayout->addWidget(sizeLabel,1,0);
    topLayout->addWidget(sizeLineEdit,1,1);

    topLayout->addWidget(createdTimeLabel,2,0);
    topLayout->addWidget(createdTimeLineEdit,2,1);

    topLayout->addWidget(lastModifiedLabel,3,0);
    topLayout->addWidget(lastModifiedLineEdit,3,1);

    topLayout->addWidget(lastVisitLabel,4,0);
    topLayout->addWidget(lastVisitLineEdit,4,1);

    topLayout->addWidget(propertyLabel,5,0);

    //center
    QHBoxLayout * centerLayout = new QHBoxLayout;

    centerLayout->addWidget(isDirCheckBox);
    centerLayout->addWidget(isFileCheckBox);
    centerLayout->addWidget(isSymbolLinkCheckBox);
    centerLayout->addWidget(isHiddenCheckBox);
    centerLayout->addWidget(isReadCheckBox);
    centerLayout->addWidget(isWritaleCheckBox);
    centerLayout->addWidget(isExecutableCheckBox);

    //main
    QVBoxLayout * mainLayout = new QVBoxLayout(this);

    mainLayout->addLayout(topLayout);
    mainLayout->addLayout(centerLayout);
    mainLayout->addWidget(getBtn);

    connect(fileBtn,SIGNAL(clicked()),this,SLOT(slotFile()));
    connect(getBtn,SIGNAL(clicked()),this,SLOT(slotGet()));

}

//获取文件名
void FileInfo::slotFile(){
    QString fileName = QFileDialog::getOpenFileName(this,tr("打 开"),"/","files (*)");
    fileLineEdit->setText(fileName);
}

//通过QFileInfo 获取文件信息
void FileInfo::slotGet(){

    QString fileName = fileLineEdit->text();

    QFileInfo info(fileName);

    qint64 size = info.size();
    QDateTime createdTime = info.created();
    QDateTime lastModified = info.lastModified();
    QDateTime lastVisit = info.lastRead();

    bool isDir = info.isDir();
    bool isFile = info.isFile();
    bool isSymbolLink = info.isSymLink();
    bool isHidden = info.isHidden();
    bool isReadable = info.isReadable();
    bool isWritable = info.isWritable();
    bool isExecutable = info.isExecutable();

    sizeLineEdit->setText(QString::number(size));
    createdTimeLineEdit->setText(createdTime.toString());
    lastModifiedLineEdit->setText(lastModified.toString());
    lastVisitLineEdit->setText(lastVisit.toString());

    isDirCheckBox->setCheckState(isDir ? Qt::Checked : Qt::Unchecked);
    isFileCheckBox->setCheckState(isFile ? Qt::Checked : Qt::Unchecked);
    isSymbolLinkCheckBox->setCheckState(isSymbolLink ? Qt::Checked : Qt::Unchecked);
    isHiddenCheckBox->setCheckState(isHidden ? Qt::Checked : Qt::Unchecked);
    isReadCheckBox->setCheckState(isReadable ? Qt::Checked : Qt::Unchecked);
    isWritaleCheckBox->setCheckState(isWritable ? Qt::Checked : Qt::Unchecked);
    isExecutableCheckBox->setCheckState(isExecutable ? Qt::Checked : Qt::Unchecked);
}

FileInfo::~FileInfo()
{
}

main.cpp:

#include "fileinfo.h"

#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    FileInfo w;
    w.show();
    return a.exec();
}