使用预定义模型QDirModel＋Treeview的例子

使用预定义模型QDirModel的例子



使用预定义模型QDirModel的例子

Main.cpp

Cpp代码

#include <QApplication>



#include "directoryviewer.h"



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

{

QApplication app(argc, argv);

DirectoryViewer directoryViewer;

directoryViewer.show();

return app.exec();

}



directoryviewer.h



Cpp代码

#ifndef DIRECTORYVIEWER_H

#define DIRECTORYVIEWER_H



#include <QDialog>



class QDialogButtonBox;

class QDirModel;

class QTreeView;



class DirectoryViewer : public QDialog

{

Q_OBJECT



public:

DirectoryViewer(QWidget *parent = 0);



private slots:

void createDirectory();

void remove();



private:

QTreeView *treeView;

QDirModel *model;

QDialogButtonBox *buttonBox;

};



#endif



directoryviewer.cpp



Cpp代码

#include <QtGui>



#include "directoryviewer.h"



DirectoryViewer::DirectoryViewer(QWidget *parent)

: QDialog(parent)

{

//创建一个目录模型

model = new QDirModel;

//可编辑

model->setReadOnly(false);

//初始排序属性 目录在前，然后文件

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



treeView = new QTreeView;

treeView->setModel(model);

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

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

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

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



//当前目录的模型索引

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

//如果需要就打开它的父对象一直到根节点，并且调用scrollTo()滚动倒当前项，确保它是可见的

treeView->expand(index);

treeView->scrollTo(index);

//确保第一列足够宽，可以显示它所有的条目。

treeView->resizeColumnToContents(0);



buttonBox = new QDialogButtonBox(Qt::Horizontal);

QPushButton *mkdirButton = buttonBox->addButton(

tr("&Create Directory..."), QDialogButtonBox::ActionRole);

QPushButton *removeButton = buttonBox->addButton(tr("&Remove"),

QDialogButtonBox::ActionRole);

buttonBox->addButton(tr("&Quit"), QDialogButtonBox::AcceptRole);



connect(mkdirButton, SIGNAL(clicked()),

this, SLOT(createDirectory()));

connect(removeButton, SIGNAL(clicked()), this, SLOT(remove()));

connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));



QVBoxLayout *mainLayout = new QVBoxLayout;

mainLayout->addWidget(treeView);

mainLayout->addWidget(buttonBox);

setLayout(mainLayout);



setWindowTitle(tr("Directory Viewer"));

}



void DirectoryViewer::createDirectory()

{

//获取当前目录 模型索引

QModelIndex index = treeView->currentIndex();

if (!index.isValid())

return;

//获取创建目录名

QString dirName = QInputDialog::getText(this,

tr("Create Directory"),

tr("Directory name"));

//创建子目录 mkdir(模型索引，目录名)

if (!dirName.isEmpty()) {

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

QMessageBox::information(this, tr("Create Directory"),

tr("Failed to create the directory"));

}

}



void DirectoryViewer::remove()

{

QModelIndex index = treeView->currentIndex();

if (!index.isValid())

return;



//删除目录 rmdir(模型索引)

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)));

}