qt实现文件浏览器
2018-03-02 11:02
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Windows的资源管理器，大家很熟悉吧，可以放回上一级，查找到下一级………Qt中QDir
类可以实现显示文件系统目录的效果。
笔者的机器环境：Windows8.1
看代码~~
fileview_widget.h
[cpp] view plain copy print?#ifndef FILEVIEWWIDGET_H
#define FILEVIEWWIDGET_H
#include <QWidget>
#include <QDir>
#include <QListWidgetItem>
#include <QFileInfoList>
#include <QListWidget>
#include <QLineEdit>
#include <QVBoxLayout>
#include <QIcon>
#include <QStringList>
class FileViewWidget : public QWidget
{
Q_OBJECT
public:
FileViewWidget(QWidget *parent=0);
//—用双击浏览器中显示的目录进入下一级，或者返回上一级目录。
void showFileInfoList(QFileInfoList list);
public slots:
//–显示当前目录下的所有文件
void slotShow(QDir dir);
//—-根据选择显示下一级目录下的文件，
void slotDirShow(QListWidgetItem *Item);
private:
QLineEdit *fileLineEdit;
QListWidget *fileListWidget;
Q
4000
VBoxLayout *vLayout;
QFileInfoList list;
};
#endif //FILEVIEWWIDGET_H
{
Q_OBJECT
public:
FileViewWidget(QWidget *parent=0);
private:
QLineEdit *fileLineEdit;
QListWidget *fileListWidget;
QVBoxLayout *vLayout;
QFileInfoList list;
};
#include<QTextCodec>
FileViewWidget::FileViewWidget(QWidget *parent/*=0*/) :QWidget(parent)
{
//—–实例化对象
fileLineEdit = new QLineEdit(“/”, this);
fileListWidget = new QListWidget(this);
//—布局
vLayout = new QVBoxLayout(this);
vLayout->addWidget(fileLineEdit);
vLayout->addWidget(fileListWidget);
//–设置对应信号与槽
connect(fileLineEdit, SIGNAL(returnPressed()),
this, SLOT(slotDirShow(QDir)));
connect(fileListWidget, SIGNAL(itemDoubleClicked(QListWidgetItem *)),
this, SLOT(slotDirShow(QListWidgetItem*)));
QString rootStr = ”/”;
QDir rootDir(rootStr);
QStringList stringlist;
stringlist << ”*”;
list = rootDir.entryInfoList(stringlist);
showFileInfoList(list);
//—显示布局
setLayout(vLayout);
//—-设置窗口属性
setWindowTitle(”File View”);
}
//–显示当前目录下的所有文件
void FileViewWidget::slotShow(QDir dir)
{
QStringList stringList;
stringList << ”*”;
QFileInfoList InfoList = dir.entryInfoList(stringList, QDir :: AllEntries, QDir :: DirsFirst);
showFileInfoList(InfoList);
}
//—用双击浏览器中显示的目录进入下一级，或者返回上一级目录。
void FileViewWidget::showFileInfoList(QFileInfoList list)
{
//–清空列表控件
fileListWidget->clear();
//—-取出所有项，按照目录，文件方式添加到控件内
for (unsigned int i = 0; i < list.count(); i++)
{
QFileInfo tmpFileInfo = list.at(i);
if (tmpFileInfo.isDir())
{
QIcon icon(”dir.png”);
QString fileName = tmpFileInfo.fileName();
QListWidgetItem*tmpListWidgetItem = new QListWidgetItem(icon, fileName);
fileListWidget->addItem(tmpListWidgetItem);
}
else
{
QIcon icon(”file.png”);
QString fileName = tmpFileInfo.fileName();
QListWidgetItem*tmpListWidgetItem = new QListWidgetItem(icon, fileName);
fileListWidget->addItem(tmpListWidgetItem);
}
}
}
//—-根据用户的选择显示下一级目录下的文件，
void FileViewWidget::slotDirShow(QListWidgetItem *Item)
{
//—-保存下一级目录名
QString string = Item->text();
QDir dir;
//—-设置路径为当前目录路径
dir.setPath(fileLineEdit->text());
//—–重新设置路径
dir.cd(string);
//—-更新当前显示路径， 这里获取的是绝对路径
fileLineEdit->setText(dir.absolutePath());
//—显示当前文件目录下的所有文件
slotShow(dir);
}
{
//-----实例化对象
fileLineEdit = new QLineEdit("/", this);
fileListWidget = new QListWidget(this);
}
//–显示当前目录下的所有文件
void FileViewWidget::slotShow(QDir dir)
{
QStringList stringList;
stringList << “*”;
QFileInfoList InfoList = dir.entryInfoList(stringList, QDir :: AllEntries, QDir :: DirsFirst);
showFileInfoList(InfoList);
}
//—用双击浏览器中显示的目录进入下一级，或者返回上一级目录。
void FileViewWidget::showFileInfoList(QFileInfoList list)
{
//–清空列表控件
fileListWidget->clear();
}
//—-根据用户的选择显示下一级目录下的文件，
void FileViewWidget::slotDirShow(QListWidgetItem *Item)
{
//—-保存下一级目录名
QString string = Item->text();
QDir dir;
//—-设置路径为当前目录路径
dir.setPath(fileLineEdit->text());
//—–重新设置路径
dir.cd(string);
//—-更新当前显示路径， 这里获取的是绝对路径
fileLineEdit->setText(dir.absolutePath());
//—显示当前文件目录下的所有文件
slotShow(dir);
}
main.cpp
[cpp] view plain copy print?#pragma once
#include <QtWidgets/QApplication>
#include “fileview_widget.h”
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
FileViewWidget win; win.show(); return a.exec();}
{
QApplication a(argc, argv);
}
下面是运行结果
这里笔者列出关于QDir::Filter 的过滤方式，信息来源：assistant
[plain] view plain copy print?Constant Value Description
QDir::Dirs 0x001 List directories that match the filters.
QDir::AllDirs 0x400 List all directories; i.e. don’t apply the filters to directory names.
QDir::Files 0x002 List files.
QDir::Drives 0x004 List disk drives (ignored under Unix).
QDir::NoSymLinks 0x008 Do not list symbolic links (ignored by operating systems that don’t support symbolic links).
QDir::NoDotAndDotDot NoDot | NoDotDot Do not list the special entries ”.” and ”..”.
QDir::NoDot 0x2000 Do not list the special entry ”.”.
QDir::NoDotDot 0x4000 Do not list the special entry ”..”.
QDir::AllEntries Dirs | Files | Drives List directories, files, drives and symlinks (this does not list broken symlinks unless you specify System).
QDir::Readable 0x010 List files for which the application has read access. The Readable value needs to be combined with Dirs or Files.
QDir::Writable 0x020 List files for which the application has write access. The Writable value needs to be combined with Dirs or Files.
QDir::Executable 0x040 List files for which the application has execute access. The Executable value needs to be combined with Dirs or Files.
QDir::Modified 0x080 Only list files that have been modified (ignored on Unix).
QDir::Hidden 0x100 List hidden files (on Unix, files starting with a ”.”).
QDir::System 0x200 List system files (on Unix, FIFOs, sockets and device files are included; on Windows, .lnk files are included)
QDir::CaseSensitive 0x800 The filter should be case sensitive.
转载自：http://blog.csdn.net/hk_5788/article/details/42435787
类可以实现显示文件系统目录的效果。
笔者的机器环境：Windows8.1
看代码~~
fileview_widget.h
[cpp] view plain copy print?#ifndef FILEVIEWWIDGET_H
#define FILEVIEWWIDGET_H
#include <QWidget>
#include <QDir>
#include <QListWidgetItem>
#include <QFileInfoList>
#include <QListWidget>
#include <QLineEdit>
#include <QVBoxLayout>
#include <QIcon>
#include <QStringList>
class FileViewWidget : public QWidget
{
Q_OBJECT
public:
FileViewWidget(QWidget *parent=0);
//—用双击浏览器中显示的目录进入下一级，或者返回上一级目录。
void showFileInfoList(QFileInfoList list);
public slots:
//–显示当前目录下的所有文件
void slotShow(QDir dir);
//—-根据选择显示下一级目录下的文件，
void slotDirShow(QListWidgetItem *Item);
private:
QLineEdit *fileLineEdit;
QListWidget *fileListWidget;
Q
4000
VBoxLayout *vLayout;
QFileInfoList list;
};
#endif //FILEVIEWWIDGET_H
#ifndef FILEVIEWWIDGET_H
define FILEVIEWWIDGET_H
include <QWidget>
include <QDir>
include <QListWidgetItem>
include <QFileInfoList>
include <QListWidget>
include <QLineEdit>
include <QVBoxLayout>
include <QIcon>
include <QStringList>
class FileViewWidget : public QWidget{
Q_OBJECT
public:
FileViewWidget(QWidget *parent=0);
//---用双击浏览器中显示的目录进入下一级，或者返回上一级目录。 void showFileInfoList(QFileInfoList list); public slots: //--显示当前目录下的所有文件 void slotShow(QDir dir); //----根据选择显示下一级目录下的文件， void slotDirShow(QListWidgetItem *Item);
private:
QLineEdit *fileLineEdit;
QListWidget *fileListWidget;
QVBoxLayout *vLayout;
QFileInfoList list;
};
endif //FILEVIEWWIDGET_H fileview_widget.cpp
[cpp] view plain copy print?#include “fileview_widget.h”#include<QTextCodec>
FileViewWidget::FileViewWidget(QWidget *parent/*=0*/) :QWidget(parent)
{
//—–实例化对象
fileLineEdit = new QLineEdit(“/”, this);
fileListWidget = new QListWidget(this);
//—布局
vLayout = new QVBoxLayout(this);
vLayout->addWidget(fileLineEdit);
vLayout->addWidget(fileListWidget);
//–设置对应信号与槽
connect(fileLineEdit, SIGNAL(returnPressed()),
this, SLOT(slotDirShow(QDir)));
connect(fileListWidget, SIGNAL(itemDoubleClicked(QListWidgetItem *)),
this, SLOT(slotDirShow(QListWidgetItem*)));
QString rootStr = ”/”;
QDir rootDir(rootStr);
QStringList stringlist;
stringlist << ”*”;
list = rootDir.entryInfoList(stringlist);
showFileInfoList(list);
//—显示布局
setLayout(vLayout);
//—-设置窗口属性
setWindowTitle(”File View”);
}
//–显示当前目录下的所有文件
void FileViewWidget::slotShow(QDir dir)
{
QStringList stringList;
stringList << ”*”;
QFileInfoList InfoList = dir.entryInfoList(stringList, QDir :: AllEntries, QDir :: DirsFirst);
showFileInfoList(InfoList);
}
//—用双击浏览器中显示的目录进入下一级，或者返回上一级目录。
void FileViewWidget::showFileInfoList(QFileInfoList list)
{
//–清空列表控件
fileListWidget->clear();
//—-取出所有项，按照目录，文件方式添加到控件内
for (unsigned int i = 0; i < list.count(); i++)
{
QFileInfo tmpFileInfo = list.at(i);
if (tmpFileInfo.isDir())
{
QIcon icon(”dir.png”);
QString fileName = tmpFileInfo.fileName();
QListWidgetItem*tmpListWidgetItem = new QListWidgetItem(icon, fileName);
fileListWidget->addItem(tmpListWidgetItem);
}
else
{
QIcon icon(”file.png”);
QString fileName = tmpFileInfo.fileName();
QListWidgetItem*tmpListWidgetItem = new QListWidgetItem(icon, fileName);
fileListWidget->addItem(tmpListWidgetItem);
}
}
}
//—-根据用户的选择显示下一级目录下的文件，
void FileViewWidget::slotDirShow(QListWidgetItem *Item)
{
//—-保存下一级目录名
QString string = Item->text();
QDir dir;
//—-设置路径为当前目录路径
dir.setPath(fileLineEdit->text());
//—–重新设置路径
dir.cd(string);
//—-更新当前显示路径， 这里获取的是绝对路径
fileLineEdit->setText(dir.absolutePath());
//—显示当前文件目录下的所有文件
slotShow(dir);
}
#include "fileview_widget.h"
include<QTextCodec>
FileViewWidget::FileViewWidget(QWidget parent/=0*/) :QWidget(parent){
//-----实例化对象
fileLineEdit = new QLineEdit("/", this);
fileListWidget = new QListWidget(this);
//---布局
vLayout = new QVBoxLayout(this);
vLayout->addWidget(fileLineEdit);
vLayout->addWidget(fileListWidget);
//--设置对应信号与槽
connect(fileLineEdit, SIGNAL(returnPressed()),
this, SLOT(slotDirShow(QDir)));
connect(fileListWidget, SIGNAL(itemDoubleClicked(QListWidgetItem *)),
this, SLOT(slotDirShow(QListWidgetItem*)));
QString rootStr = "/";
QDir rootDir(rootStr);
QStringList stringlist;
stringlist << "*";
list = rootDir.entryInfoList(stringlist);
showFileInfoList(list);
//---显示布局
setLayout(vLayout);
//----设置窗口属性
setWindowTitle("File View");}
//–显示当前目录下的所有文件
void FileViewWidget::slotShow(QDir dir)
{
QStringList stringList;
stringList << “*”;
QFileInfoList InfoList = dir.entryInfoList(stringList, QDir :: AllEntries, QDir :: DirsFirst);
showFileInfoList(InfoList);
}
//—用双击浏览器中显示的目录进入下一级，或者返回上一级目录。
void FileViewWidget::showFileInfoList(QFileInfoList list)
{
//–清空列表控件
fileListWidget->clear();
//----取出所有项，按照目录，文件方式添加到控件内
for (unsigned int i = 0; i < list.count(); i++)
{
QFileInfo tmpFileInfo = list.at(i);
if (tmpFileInfo.isDir())
{
QIcon icon("dir.png");
QString fileName = tmpFileInfo.fileName();
QListWidgetItem*tmpListWidgetItem = new QListWidgetItem(icon, fileName);
fileListWidget->addItem(tmpListWidgetItem);
}
else
{
QIcon icon("file.png");
QString fileName = tmpFileInfo.fileName();
QListWidgetItem*tmpListWidgetItem = new QListWidgetItem(icon, fileName);
fileListWidget->addItem(tmpListWidgetItem);
}
}}
//—-根据用户的选择显示下一级目录下的文件，
void FileViewWidget::slotDirShow(QListWidgetItem *Item)
{
//—-保存下一级目录名
QString string = Item->text();
QDir dir;
//—-设置路径为当前目录路径
dir.setPath(fileLineEdit->text());
//—–重新设置路径
dir.cd(string);
//—-更新当前显示路径， 这里获取的是绝对路径
fileLineEdit->setText(dir.absolutePath());
//—显示当前文件目录下的所有文件
slotShow(dir);
}
main.cpp
[cpp] view plain copy print?#pragma once
#include <QtWidgets/QApplication>
#include “fileview_widget.h”
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
FileViewWidget win; win.show(); return a.exec();}
#pragma once
include <QtWidgets/QApplication>
include “fileview_widget.h”
int main(int argc, char *argv[]){
QApplication a(argc, argv);
FileViewWidget win; win.show(); return a.exec();
}
下面是运行结果
这里笔者列出关于QDir::Filter 的过滤方式，信息来源：assistant
[plain] view plain copy print?Constant Value Description
QDir::Dirs 0x001 List directories that match the filters.
QDir::AllDirs 0x400 List all directories; i.e. don’t apply the filters to directory names.
QDir::Files 0x002 List files.
QDir::Drives 0x004 List disk drives (ignored under Unix).
QDir::NoSymLinks 0x008 Do not list symbolic links (ignored by operating systems that don’t support symbolic links).
QDir::NoDotAndDotDot NoDot | NoDotDot Do not list the special entries ”.” and ”..”.
QDir::NoDot 0x2000 Do not list the special entry ”.”.
QDir::NoDotDot 0x4000 Do not list the special entry ”..”.
QDir::AllEntries Dirs | Files | Drives List directories, files, drives and symlinks (this does not list broken symlinks unless you specify System).
QDir::Readable 0x010 List files for which the application has read access. The Readable value needs to be combined with Dirs or Files.
QDir::Writable 0x020 List files for which the application has write access. The Writable value needs to be combined with Dirs or Files.
QDir::Executable 0x040 List files for which the application has execute access. The Executable value needs to be combined with Dirs or Files.
QDir::Modified 0x080 Only list files that have been modified (ignored on Unix).
QDir::Hidden 0x100 List hidden files (on Unix, files starting with a ”.”).
QDir::System 0x200 List system files (on Unix, FIFOs, sockets and device files are included; on Windows, .lnk files are included)
QDir::CaseSensitive 0x800 The filter should be case sensitive.
Constant Value Description QDir::Dirs 0x001 List directories that match the filters. QDir::AllDirs 0x400 List all directories; i.e. don't apply the filters to directory names. QDir::Files 0x002 List files. QDir::Drives 0x004 List disk drives (ignored under Unix). QDir::NoSymLinks 0x008 Do not list symbolic links (ignored by operating systems that don't support symbolic links). QDir::NoDotAndDotDot NoDot | NoDotDot Do not list the special entries "." and "..". QDir::NoDot 0x2000 Do not list the special entry ".". QDir::NoDotDot 0x4000 Do not list the special entry "..". QDir::AllEntries Dirs | Files | Drives List directories, files, drives and symlinks (this does not list broken symlinks unless you specify System). QDir::Readable 0x010 List files for which the application has read access. The Readable value needs to be combined with Dirs or Files. QDir::Writable 0x020 List files for which the application has write access. The Writable value needs to be combined with Dirs or Files. QDir::Executable 0x040 List files for which the application has execute access. The Executable value needs to be combined with Dirs or Files. QDir::Modified 0x080 Only list files that have been modified (ignored on Unix). QDir::Hidden 0x100 List hidden files (on Unix, files starting with a "."). QDir::System 0x200 List system files (on Unix, FIFOs, sockets and device files are included; on Windows, .lnk files are included) QDir::CaseSensitive 0x800 The filter should be case sensitive.
</div>
转载自：http://blog.csdn.net/hk_5788/article/details/42435787
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