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/***************************************************************************
FileProgress.h - progress window for loading/saving files
-------------------
begin : Mar 11 2001
copyright : (C) 2001 by Thomas Eschenbacher
email : Thomas Eschenbacher <thomas.eschenbacher@gmx.de>
***************************************************************************/
/***************************************************************************
* *
* 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 FILE_PROGRESS_H
#define FILE_PROGRESS_H
#include "config.h"
#include "libkwave_export.h"
#include <QtGlobal>
#include <QDialog>
#include <QElapsedTimer>
#include <QLabel>
#include <QUrl>
#include "libkwave/Sample.h"
class QCloseEvent;
class QGridLayout;
class QProgressBar;
class QResizeEvent;
namespace Kwave
{
class LIBKWAVE_EXPORT FileProgress: public QDialog
{
Q_OBJECT
public:
/**
* Constructor
* @param parent the parent widget
* @param url the URL of the file
* @param size the size of the file in bytes
* @param samples the number of samples
* @param rate sample rate in samples per second
* @param bits number of bits per sample
* @param tracks number of tracks
*/
FileProgress(QWidget *parent,
const QUrl &url, quint64 size,
sample_index_t samples, double rate, unsigned int bits,
unsigned int tracks);
/** Destructor */
~FileProgress() override {}
/**
* Returns true if the dialog is unusable or the user
* has pressed the "cancel" button.
*/
inline bool isCanceled() { return m_canceled; }
signals:
/**
* Emitted when the user has pressed the Cancel button and
* has confirmed with "Yes".
*/
void canceled();
public slots:
/**
* Advances the progress to a given position within the file.
* @param percent position within the file, in percent
*/
void setValue(qreal percent);
/**
* Like setValue, but takes position in bytes as argument
* @param pos position within the file, in bytes [0...m_size-1]
*/
void setBytePosition(quint64 pos);
/**
* Updates the length information, needed in stream mode.
* @param samples total number of samples, must be divided through
* the number of tracks for getting the real length
*/
void setLength(quint64 samples);
protected slots:
/**
* Connected to the "cancel" button to set the "m_canceled"
* flag if the user wants to abort.
*/
void cancel();
protected:
/**
* Fits again the URL label on resize events.
* @see fitUrlLabel()
*/
void resizeEvent(QResizeEvent *) override;
/**
* Called if the window is to be closed.
*/
void closeEvent(QCloseEvent *e) override;
/**
* Fits the URL text into the available area, with
* shortening it if necessary.
*/
void fitUrlLabel();
/**
* Adds a label to an info field. Used within the constructor.
* @param layout the QGridLayout with the labels
* @param text the content of the label, localized
* @param row the row within the layout [0...rows-1]
* @param column the column within the layout [0...columns-1]
* @return the label if successful, 0 if failed
* @internal
*/
QLabel *addInfoLabel(QGridLayout *layout, const QString text,
int row, int column);
/**
* Updates the statistics of the transferred bytes and
* transfer rate.
* @param rate transfer rate in kilobytes per seconds
* @param rest remaining time in seconds
* @param pos position in the file
* @internal
*/
void updateStatistics(double rate, double rest, quint64 pos);
protected:
/** url of the file */
QUrl m_url;
/** size of the file [Bytes] */
quint64 m_size;
/** label with the url, shortened when too long */
QLabel *m_lbl_url;
/** label with length info, changes in streaming mode */
QLabel *m_lbl_length;
/** progress bar */
QProgressBar *m_progress;
/** label with transfer statistics */
QLabel *m_stat_transfer;
/** label with progress statistics */
QLabel *m_stat_bytes;
/** start time, set on initialization of this dialog */
QElapsedTimer m_time;
/** true if the dialog is unusable or canceled by the user */
bool m_canceled;
/** last displayed percent value */
int m_last_percent;
/** number of bits per sample */
unsigned int m_bits_per_sample;
/** number of samples per second, used for output */
double m_sample_rate;
/** number of tracks */
unsigned int m_tracks;
};
}
#endif /* FILE_PROGRESS_H */
//***************************************************************************
//***************************************************************************
|
