A Directory Browser(1)

A Directory Browser

This example program demonstrates how to use a listview and listview items to build a multi-column hierarchical, memory- and CPU-efficient directory browser. It also demonstrates how to use Drag&Drop in a listview.

Header file:

/****************************************************************************** $Id:qt/dirview.h3.0.5edited Oct 12 2001 $**** Copyright (C) 1992-2000 Trolltech AS.All rights reserved.**** This file is part of an example program for Qt.This example** program may be used, distributed and modified without limitation.*******************************************************************************/#ifndef DIRVIEW_H#define DIRVIEW_H#include <qlistview.h>#include <qstring.h>#include <qfile.h>#include <qfileinfo.h>#include <qtimer.h>class QWidget;class QDragEnterEvent;class QDragMoveEvent;class QDragLeaveEvent;class QDropEvent;class FileItem : public QListViewItem{public: FileItem( QListViewItem *parent, const QString &s1, const QString &s2 ): QListViewItem( parent, s1, s2 ), pix( 0 ) {} const QPixmap *pixmap( int i ) const; void setPixmap( QPixmap *p );private: QPixmap *pix;};class Directory : public QListViewItem{public: Directory( QListView * parent, const QString& filename ); Directory( Directory * parent, const QString& filename, const QString &col2 ): QListViewItem( parent, filename, col2 ), pix( 0 ) {} Directory( Directory * parent, const QString& filename ); QString text( int column ) const; QString fullName(); void setOpen( bool ); void setup(); const QPixmap *pixmap( int i ) const; void setPixmap( QPixmap *p );private: QFile f; Directory * p; bool readable; bool showDirsOnly; QPixmap *pix;};class DirectoryView : public QListView{ Q_OBJECTpublic: DirectoryView( QWidget *parent = 0, const char *name = 0, bool sdo = FALSE ); bool showDirsOnly() { return dirsOnly; }public slots: void setDir( const QString & );signals: void folderSelected( const QString & );protected slots: void slotFolderSelected( QListViewItem * ); void openFolder();protected: void contentsDragEnterEvent( QDragEnterEvent *e ); void contentsDragMoveEvent( QDragMoveEvent *e ); void contentsDragLeaveEvent( QDragLeaveEvent *e ); void contentsDropEvent( QDropEvent *e ); void contentsMouseMoveEvent( QMouseEvent *e ); void contentsMousePressEvent( QMouseEvent *e ); void contentsMouseReleaseEvent( QMouseEvent *e );private: QString fullPath(QListViewItem* item); bool dirsOnly; QListViewItem *oldCurrent; QListViewItem *dropItem; QTimer* autoopen_timer; QPoint presspos; bool mousePressed;};#endif