qt实现文件浏览器
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
- #ifndef FILEVIEWWIDGET_H
- #define FILEVIEWWIDGET_H
- #include
- #include
- #include
- #include
- #include
- #include
- #include
- #include
- #include
- 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
#ifndef FILEVIEWWIDGET_H
define FILEVIEWWIDGET_H
include
include
include
include
include
include
include
include
include
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
- #include “fileview_widget.h”
- #include
- 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
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
- #pragma once
- #include
- #include “fileview_widget.h”
- int main(int argc, char *argv[])
- {
- QApplication a(argc, argv);
- FileViewWidget win;
- win.show();
- return a.exec();
- }
#pragma once
include
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
- 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. 转载自：http://blog.csdn.net/hk_5788/article/details/42435787