view widgets/ProgressDialog.cpp @ 1551:e79731086b0f

Fixes to NoteLayer, particularly to calculation of vertical scale when model unit is not Hz. To avoid inconsistency we now behave as if the unit is always Hz from the point of view of the external API and display, converting at the point where we obtain values from the events themselves. Also various fixes to editing.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2007-2008 QMUL.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#include "ProgressDialog.h"

#include <QProgressDialog>
#include <QApplication>
#include <QTimer>

ProgressDialog::ProgressDialog(QString message,
                               bool cancellable,
                               int timeBeforeShow,
                               QWidget *parent,
                               Qt::WindowModality modality) : 
    m_showTimer(nullptr),
    m_timerElapsed(false),
    m_cancelled(false)
{
    m_dialog = new QProgressDialog(message, cancellable ? tr("Cancel") : nullptr,
                                   0, 100, parent);
    m_dialog->setWindowModality(modality);

    if (timeBeforeShow > 0) {
        m_dialog->hide();
        m_showTimer = new QTimer;
        connect(m_showTimer, SIGNAL(timeout()), this, SLOT(showTimerElapsed()));
        m_showTimer->setSingleShot(true);
        m_showTimer->start(timeBeforeShow);
    } else {
        m_dialog->show();
        m_dialog->raise();
        m_timerElapsed = true;
    }

    if (cancellable) {
        connect(m_dialog, SIGNAL(canceled()), this, SLOT(canceled()));
    }
}

ProgressDialog::~ProgressDialog()
{
    delete m_showTimer;
    delete m_dialog;
}

bool
ProgressDialog::isDefinite() const
{
    return (m_dialog->maximum() > 0);
}

void
ProgressDialog::setDefinite(bool definite)
{
    if (definite) m_dialog->setMaximum(100);
    else m_dialog->setMaximum(0);
}

void
ProgressDialog::setMessage(QString text)
{
    m_dialog->setLabelText(text);
}

void
ProgressDialog::canceled()
{
    m_cancelled = true;
    emit cancelled();
}

bool
ProgressDialog::wasCancelled() const
{
    return m_cancelled;
}

void
ProgressDialog::showTimerElapsed()
{
    m_timerElapsed = true;
    if (m_dialog->value() > 0) {
        emit showing();
        m_dialog->show();
    }
    qApp->processEvents();
}

void
ProgressDialog::setProgress(int percentage)
{
    if (percentage > m_dialog->value()) {
        if (percentage >= 100 && isDefinite()) {
            m_dialog->hide();
        } else if (m_timerElapsed && !m_dialog->isVisible()) {
            emit showing();
            m_dialog->show();
            m_dialog->raise();
        }
        m_dialog->setValue(percentage); // processes event loop when modal
        if (!m_dialog->isModal()) qApp->processEvents();
    }
}