Chris@378: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@378: 
Chris@378: /*
Chris@378:     Sonic Visualiser
Chris@378:     An audio file viewer and annotation editor.
Chris@378:     Centre for Digital Music, Queen Mary, University of London.
Chris@378:     This file copyright 2007-2008 QMUL.
Chris@378:     
Chris@378:     This program is free software; you can redistribute it and/or
Chris@378:     modify it under the terms of the GNU General Public License as
Chris@378:     published by the Free Software Foundation; either version 2 of the
Chris@378:     License, or (at your option) any later version.  See the file
Chris@378:     COPYING included with this distribution for more information.
Chris@378: */
Chris@378: 
Chris@378: #include "ProgressDialog.h"
Chris@378: 
Chris@378: #include <QProgressDialog>
Chris@378: #include <QApplication>
Chris@378: #include <QTimer>
Chris@378: 
dev@1268: ProgressDialog::ProgressDialog(QString message,
dev@1268:                                bool cancellable,
dev@1268:                                int timeBeforeShow,
dev@1268:                                QWidget *parent,
dev@1268:                                Qt::WindowModality modality) : 
Chris@378:     m_showTimer(0),
Chris@410:     m_timerElapsed(false),
Chris@410:     m_cancelled(false)
Chris@378: {
Chris@378:     m_dialog = new QProgressDialog(message, cancellable ? tr("Cancel") : 0,
Chris@378:                                    0, 100, parent);
dev@1267:     m_dialog->setWindowModality(modality);
dev@1267: 
Chris@378:     if (timeBeforeShow > 0) {
Chris@378:         m_dialog->hide();
Chris@378:         m_showTimer = new QTimer;
Chris@378:         connect(m_showTimer, SIGNAL(timeout()), this, SLOT(showTimerElapsed()));
Chris@378:         m_showTimer->setSingleShot(true);
Chris@378:         m_showTimer->start(timeBeforeShow);
Chris@378:     } else {
Chris@378:         m_dialog->show();
Chris@378:         m_dialog->raise();
Chris@378:         m_timerElapsed = true;
Chris@378:     }
Chris@378: 
Chris@378:     if (cancellable) {
Chris@410:         connect(m_dialog, SIGNAL(canceled()), this, SLOT(canceled()));
Chris@378:     }
Chris@378: }
Chris@378: 
Chris@378: ProgressDialog::~ProgressDialog()
Chris@378: {
Chris@378:     delete m_showTimer;
Chris@378:     delete m_dialog;
Chris@378: }
Chris@378: 
Chris@410: bool
Chris@410: ProgressDialog::isDefinite() const
Chris@410: {
Chris@410:     return (m_dialog->maximum() > 0);
Chris@410: }
Chris@410: 
Chris@410: void
Chris@410: ProgressDialog::setDefinite(bool definite)
Chris@410: {
Chris@410:     if (definite) m_dialog->setMaximum(100);
Chris@410:     else m_dialog->setMaximum(0);
Chris@410: }
Chris@410: 
Chris@378: void
Chris@378: ProgressDialog::setMessage(QString text)
Chris@378: {
Chris@378:     m_dialog->setLabelText(text);
Chris@378: }
Chris@378: 
Chris@378: void
Chris@410: ProgressDialog::canceled()
Chris@410: {
Chris@410:     m_cancelled = true;
Chris@410:     emit cancelled();
Chris@410: }
Chris@410: 
Chris@410: bool
Chris@410: ProgressDialog::wasCancelled() const
Chris@410: {
Chris@410:     return m_cancelled;
Chris@410: }
Chris@410: 
Chris@410: void
Chris@378: ProgressDialog::showTimerElapsed()
Chris@378: {
Chris@378:     m_timerElapsed = true;
Chris@378:     if (m_dialog->value() > 0) {
Chris@410:         emit showing();
Chris@378:         m_dialog->show();
Chris@378:     }
Chris@378:     qApp->processEvents();
Chris@378: }
Chris@378: 
Chris@378: void
Chris@378: ProgressDialog::setProgress(int percentage)
Chris@378: {
Chris@378:     if (percentage > m_dialog->value()) {
Chris@410:         if (percentage >= 100 && isDefinite()) {
Chris@378:             m_dialog->hide();
Chris@378:         } else if (m_timerElapsed && !m_dialog->isVisible()) {
Chris@410:             emit showing();
Chris@378:             m_dialog->show();
Chris@378:             m_dialog->raise();
Chris@378:         }
dev@1267:         m_dialog->setValue(percentage); // processes event loop when modal
dev@1267:         if (!m_dialog->isModal()) qApp->processEvents();
Chris@378:     }
dev@1267: }