QT做一个硬盘目录视图QTreeView，QDirModel





首先，我们来看一个很有用的model：QDirModel。这个model允许我们在view中显示操作系统的目录结构，

当然我们肯定要用到QTreeView。这次让我们先来看看运行结果：

首先，我们要建立一个QT的项目，然后呢点击项目属性，添加新文件，选择c++ Class，点击Choose输入一个类名，

接着在.h文件里面添加要用到的类

#ifndefMYTREEVIEW_H

#define MYTREEVIEW_H

#include <QWidget>

#include <QDirModel>

#include <QTreeView>

#include <QMainWindow>

class MyTreeView :public QWidget

{

        Q_OBJECT

public:

        MyTreeView();//构造

private:

        QDirModel *model;//定义模型变量

        QTreeView *treeView;//定义树视图

private slots:

        void mkdir();

        void rm();

};

#endif // MYTREEVIEW_H

接着就在.cpp文件里面去写代码了：

#include"mytreeview.h"

#include <QTreeView>

#include <QHeaderView>

#include <QHBoxLayout>//布局类

#include <QString>//文本类

#include <QPushButton>

#include <QInputDialog>

#include <QMessageBox>//

MyTreeView::MyTreeView()

{

        model = new QDirModel;//模型

        model->setReadOnly(false);//设置为只读

        model->setSorting(QDir::DirsFirst | QDir::IgnoreCase | QDir::Name);//排序

        treeView = new QTreeView;//

        treeView->setModel(model);

        treeView->header()->setStretchLastSection(true);

        treeView->header()->setSortIndicator(0, Qt::AscendingOrder);

        treeView->header()->setSortIndicatorShown(true);

       // treeView->header()->setClickable(true);

        QModelIndex index = model->index(QDir::currentPath());

        treeView->expand(index);

        treeView->scrollTo(index);

        treeView->resizeColumnToContents(0);

        QHBoxLayout *btnLayout = new QHBoxLayout;

        QPushButton *createBtn = new QPushButton(tr("Create Directory..."));

        QPushButton *delBtn = new QPushButton(tr("Remove"));

        btnLayout->addWidget(createBtn);

        btnLayout->addWidget(delBtn);

        QVBoxLayout *mainLayout = new QVBoxLayout(this);

        mainLayout->addWidget(treeView);

        mainLayout->addLayout(btnLayout);

        this->setLayout(mainLayout);

        connect(createBtn, SIGNAL(clicked()), this, SLOT(mkdir()));

        connect(delBtn, SIGNAL(clicked()), this, SLOT(rm()));

}

void MyTreeView::mkdir()

{

        QModelIndex index = treeView->currentIndex();

        if (!index.isValid()) {

                return;

        }

        QString dirName = QInputDialog::getText(this,tr("Create Directory"),tr("Directory name"));

        if (!dirName.isEmpty()) {

                if (!model->mkdir(index, dirName).isValid()) {

                        QMessageBox::information(this, tr("Create Directory"),  tr("Failed to create the directory"));

                }

        }

}

void MyTreeView::rm()

{

        QModelIndex index = treeView->currentIndex();

        if (!index.isValid()) {

                return;

        }

        bool ok;

        if (model->fileInfo(index).isDir()) {

                ok = model->rmdir(index);

        } else {

                ok = model->remove(index);

        }

        if (!ok) {

                QMessageBox::information(this, tr("Remove"),tr("Failed to remove %1").arg(model->fileName(index)));

        }

}

然后在，main.cpp文件里面   

MyTreeViewb;

    b.show();

就可以了