QT中的文件浏览

#ifndef FILEVIEWR_H
#define FILEVIEWR_H

#include <QtGui>
#include "ui_fileviewr.h"

class FileViewr : public QDialog
{
	Q_OBJECT

public:
	FileViewr(QWidget *parent = 0, Qt::WFlags flags = 0);
	~FileViewr();

private:
	Ui::FileViewrClass ui;

	QLineEdit *LineEditDir;
	QListWidget *ListWidaetFile;
	
	void showFileInfoList(QFileInfoList list);
private slots:
		void slotShow(QDir dir);
		void slotShowDir(QListWidgetItem *item);

};

#endif // FILEVIEWR_H

#include "fileviewr.h"

FileViewr::FileViewr(QWidget *parent, Qt::WFlags flags)
	: QDialog(parent, flags)
{
	ui.setupUi(this);
	setWindowTitle(tr("File views"));

	LineEditDir=new QLineEdit();
	LineEditDir->setText("/");

	ListWidaetFile=new QListWidget();

	QVBoxLayout *layout=new QVBoxLayout(this);
	layout->addWidget(LineEditDir);
	layout->addWidget(ListWidaetFile);

	connect(LineEditDir,SIGNAL(returnPressed()),this,SLOT(slotShow()));
	connect(ListWidaetFile,SIGNAL(itemDoubleClicked(QListWidgetItem *)),this,SLOT(slotShowDir(QListWidgetItem *)));

	QString root="/";
	QDir rootDir(root);

	QStringList string;
	string<<"*";
	QFileInfoList list=rootDir.entryInfoList(string);
	showFileInfoList(list);

}

FileViewr::~FileViewr()
{

}

/*
 * slotShow 负责显示dir目录下的所有文件
 **/
void FileViewr::slotShow(QDir dir){
	QStringList string;
	string <<"*";
	QFileInfoList list=dir.entryInfoList (string,QDir::AllEntries,QDir::DirsFirst);
	showFileInfoList(list);
}

void FileViewr::slotShowDir(QListWidgetItem *item){

	QString str=item->text();
	QDir dir;
	dir.setPath(LineEditDir->text());
	dir.cd(str);
	LineEditDir->setText(dir.absolutePath());
	slotShow(dir);
}

void FileViewr::showFileInfoList(QFileInfoList list){
	ListWidaetFile->clear();

	 for(unsigned int i=0;i<list.count();i++){
		QFileInfo temFileinfo=list.at(i);
		if(temFileinfo.isDir()){
			QIcon icon(":/images/dir.png");
			QString fileName=temFileinfo.fileName();
			QListWidgetItem *tmp=new QListWidgetItem(icon,fileName);
			ListWidaetFile->addItem(tmp);
		}else{
			QIcon icon(":/images/file.png");
			QString fileName=temFileinfo.fileName();
			QListWidgetItem *tmp=new QListWidgetItem(icon,fileName);
			ListWidaetFile->addItem(tmp);
		}
	}
}

#include "fileviewr.h"
#include <QtGui/QApplication>

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	FileViewr *w=new FileViewr;
	w->show();

	
	return a.exec();
}