krcalcspacedialog.h

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/***************************************************************************
                          krcalcspacedialog.h  -  description
                             -------------------
    begin                : Fri Jan 2 2004
    copyright            : (C) 2004 by Shie Erlich & Rafi Yanai
    e-mail               : [e-mail]
    web site             : http://krusader.sourceforge.net
 ---------------------------------------------------------------------------
  Description
 ***************************************************************************

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                                                     H e a d e r    F i l e

 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef KRCALCSPACEDIALOG_H
#define KRCALCSPACEDIALOG_H

/* --=={ Patch by Heiner <[e-mail]> }==-- */

// KDE Includes
#include <kdialogbase.h>
#include <kio/jobclasses.h>
// Qt Includes
#include <qthread.h>
// Krusader Includes
#include "../VFS/vfs.h"
#include "krdetailedviewitem.h"
class ListPanel;
class KrView;


/* Dialog calculating showing the number of files and directories and its total size
   in a dialog. If wanted, the dialog appears after 3 seconds of calculation, to
   avoid a short appearence if the result was found quickly. Computes teh result in
   a different thread.
 */
class KrCalcSpaceDialog : public KDialogBase{
	Q_OBJECT
	/* Thread which does the actual calculation. Deletes itself, if no longer
	   needed. Creator must call finished(), if the thread is no longer needed.
	*/
	class CalcThread : public QThread{
		KIO::filesize_t m_totalSize, m_currentSize;
		unsigned long m_totalFiles;
		unsigned long m_totalDirs;
		const QStringList m_items;
		vfs * m_files;
		KrView *m_view;
		KrCalcSpaceDialog * m_parent;
		QMutex m_synchronizeUsageAccess;
		bool m_threadInUse; // true: caller needs the thread
		bool m_stop;
		void cleanUp(); // Deletes this, if possible
	public:
		KIO::filesize_t getTotalSize() const {return m_totalSize + m_currentSize;} // the result
		unsigned long getTotalFiles() const {return m_totalFiles;} // the result
		unsigned long getTotalDirs() const {return m_totalDirs;} // the result
		const QStringList & getItems() const {return m_items;} // list of directories to calculate
		CalcThread(KrCalcSpaceDialog * parent, ListPanel * panel, const QStringList & items);
		void deleteInstance(); // thread is no longer needed.
		void run(); // start calculation
		void stop(); // stop it. Thread continues until vfs_calcSpace returns
	} * m_thread;
	friend class CalcThread;
	class QTimer * m_pollTimer;
	QLabel * m_label;
	bool m_autoClose; // true: wait 3 sec. before showing the dialog. Close it, when done
	bool m_canceled; // true: cancel was pressed
	int m_timerCounter; // internal counter. The timer runs faster as the rehresh (see comment there)
	void calculationFinished(); // called if the calulation is done
	void showResult(); // show the current result in teh dialog
	static void setDirSize(KrDetailedViewItem * viewItem, KIO::filesize_t size) {viewItem->setSize(size);}
protected slots:
	void timer(); // poll timer was fired
	void slotCancel(); // cancel was pressed
public:
	// autoclose: wait 3 sec. before showing the dialog. Close it, when done
	KrCalcSpaceDialog(QWidget *parent, ListPanel * panel, const QStringList & items, bool autoclose);
	~KrCalcSpaceDialog();
	KIO::filesize_t getTotalSize() const {return m_thread->getTotalSize();} // the result
	unsigned long getTotalFiles() const {return m_thread->getTotalFiles();} // the result
	unsigned long getTotalDirs() const {return m_thread->getTotalDirs();} // the result
	bool wasCanceled() const {return m_canceled;} // cancel was pressed; result is probably wrong
public slots:
	void exec(); // start calculation
};
/* End of patch by Heiner <[e-mail]> */

#endif