view widgets/ProgressDialog.cpp @ 561:aced8ec09bc8

* Complete the overhaul of CSV file import; now you can pick the purpose for
  each column in the file, and SV should do the rest.  The most significant
  practical improvement here is that we can now handle files in which time
  and duration do not necessarily appear in known columns.

/* -*- 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) : 
    m_showTimer(0),
    m_timerElapsed(false),
    m_cancelled(false)
{
    m_dialog = new QProgressDialog(message, cancellable ? tr("Cancel") : 0,
                                   0, 100, parent);
    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()) {

        m_dialog->setValue(percentage);

        if (percentage >= 100 && isDefinite()) {
            m_dialog->hide();
        } else if (m_timerElapsed && !m_dialog->isVisible()) {
            emit showing();
            m_dialog->show();
            m_dialog->raise();
        }

        qApp->processEvents();
    }
}