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

/*
    Rosegarden
    A MIDI and audio sequencer and musical notation editor.
 
    This program is Copyright 2000-2008
        Guillaume Laurent   <glaurent@telegraph-road.org>,
        Chris Cannam        <cannam@all-day-breakfast.com>,
        Richard Bown        <richard.bown@ferventsoftware.com>
 
    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
    Bown to claim authorship of this work have been asserted.
 
    Other copyrights also apply to some parts of this work.  Please
    see the AUTHORS file and individual file headers for details.
 
    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 "TimeSignatureDialog.h"
#include <kapplication.h>

#include <klocale.h>
#include "document/ConfigGroups.h"
#include "base/Composition.h"
#include "base/NotationTypes.h"
#include "gui/widgets/TimeWidget.h"
#include "gui/widgets/BigArrowButton.h"
#include <kconfig.h>
#include <kdialogbase.h>
#include <tqbuttongroup.h>
#include <tqcheckbox.h>
#include <tqfont.h>
#include <tqgroupbox.h>
#include <tqhbox.h>
#include <tqlabel.h>
#include <tqobject.h>
#include <tqradiobutton.h>
#include <tqstring.h>
#include <tqvbox.h>
#include <tqwidget.h>


namespace Rosegarden
{

TimeSignatureDialog::TimeSignatureDialog(TQWidget *parent,
        Composition *composition,
        timeT insertionTime,
        TimeSignature sig,
        bool timeEditable,
        TQString explanatoryText) :
        KDialogBase(parent, 0, true, i18n("Time Signature"), Ok | Cancel | Help),
        m_composition(composition),
        m_timeSignature(sig),
        m_time(insertionTime),
        m_numLabel(0),
        m_denomLabel(0),
        m_explanatoryLabel(0),
        m_commonTimeButton(0),
        m_hideSignatureButton(0),
        m_normalizeRestsButton(0),
        m_asGivenButton(0),
        m_startOfBarButton(0),
        m_timeEditor(0)
{
    static TQFont *timeSigFont = 0;

    if (timeSigFont == 0) {
        timeSigFont = new TQFont("new century schoolbook", 8, TQFont::Bold);
        timeSigFont->setPixelSize(20);
    }

    TQVBox *vbox = makeVBoxMainWidget();
    TQGroupBox *groupBox = new QGroupBox
                          (1, Horizontal, i18n("Time signature"), vbox);
    TQHBox *numBox = new TQHBox(groupBox);
    TQHBox *denomBox = new TQHBox(groupBox);

    TQLabel *explanatoryLabel = 0;
    if (explanatoryText) {
        explanatoryLabel = new TQLabel(explanatoryText, groupBox);
    }

    BigArrowButton *numDown = new BigArrowButton(numBox, Qt::LeftArrow);
    BigArrowButton *denomDown = new BigArrowButton(denomBox, Qt::LeftArrow);

    m_numLabel = new QLabel
                 (TQString("%1").arg(m_timeSignature.getNumerator()), numBox);
    m_denomLabel = new QLabel
                   (TQString("%1").arg(m_timeSignature.getDenominator()), denomBox);

    m_numLabel->setAlignment(AlignHCenter | AlignVCenter);
    m_denomLabel->setAlignment(AlignHCenter | AlignVCenter);

    m_numLabel->setFont(*timeSigFont);
    m_denomLabel->setFont(*timeSigFont);

    BigArrowButton *numUp = new BigArrowButton(numBox, Qt::RightArrow);
    BigArrowButton *denomUp = new BigArrowButton(denomBox, Qt::RightArrow);

    TQObject::connect(numDown, TQT_SIGNAL(clicked()), this, TQT_SLOT(slotNumDown()));
    TQObject::connect(numUp, TQT_SIGNAL(clicked()), this, TQT_SLOT(slotNumUp()));
    TQObject::connect(denomDown, TQT_SIGNAL(clicked()), this, TQT_SLOT(slotDenomDown()));
    TQObject::connect(denomUp, TQT_SIGNAL(clicked()), this, TQT_SLOT(slotDenomUp()));

    if (timeEditable) {

        m_timeEditor = new TimeWidget
                       (i18n("Time where signature takes effect"),
                        vbox,
                        composition,
                        m_time,
                        true);

        m_asGivenButton = 0;
        m_startOfBarButton = 0;

    } else {

        m_timeEditor = 0;

        groupBox = new TQButtonGroup(1, Horizontal, i18n("Scope"), vbox);

        int barNo = composition->getBarNumber(m_time);
        bool atStartOfBar = (m_time == composition->getBarStart(barNo));

        if (!atStartOfBar) {

            TQString scopeText;

            if (barNo != 0 || !atStartOfBar) {
                if (atStartOfBar) {
                    scopeText = QString
                                (i18n("Insertion point is at start of measure %1."))
                                .arg(barNo + 1);
                } else {
                    scopeText = QString
                                (i18n("Insertion point is in the middle of measure %1."))
                                .arg(barNo + 1);
                }
            } else {
                scopeText = QString
                            (i18n("Insertion point is at start of composition."));
            }

            new TQLabel(scopeText, groupBox);
            m_asGivenButton = new QRadioButton
                              (i18n("Start measure %1 here").arg(barNo + 2), groupBox);

            if (!atStartOfBar) {
                m_startOfBarButton = new QRadioButton
                                     (i18n("Change time from start of measure %1")
                                      .arg(barNo + 1), groupBox);
                m_startOfBarButton->setChecked(true);
            } else {
                m_asGivenButton->setChecked(true);
            }
        } else {
            new TQLabel(i18n("Time change will take effect at the start of measure %1.")
                       .arg(barNo + 1), groupBox);
        }
    }

    groupBox = new TQGroupBox(1, Horizontal, i18n("Options"), vbox);
    KConfig *config = kapp->config();
    config->setGroup(GeneralOptionsConfigGroup);

    m_hideSignatureButton = new QCheckBox
                            (i18n("Hide the time signature"), groupBox);
    m_hideSignatureButton->setChecked
    (config->readBoolEntry("timesigdialogmakehidden", false));

    m_hideBarsButton = new QCheckBox
                       (i18n("Hide the affected bar lines"), groupBox);
    m_hideBarsButton->setChecked
    (config->readBoolEntry("timesigdialogmakehiddenbars", false));

    m_commonTimeButton = new QCheckBox
                         (i18n("Show as common time"), groupBox);
    m_commonTimeButton->setChecked
    (config->readBoolEntry("timesigdialogshowcommon", true));

    m_normalizeRestsButton = new QCheckBox
                             (i18n("Correct the durations of following measures"), groupBox);
    m_normalizeRestsButton->setChecked
    (config->readBoolEntry("timesigdialognormalize", true));

    TQObject::connect(m_hideSignatureButton, TQT_SIGNAL(clicked()), this,
                     TQT_SLOT(slotUpdateCommonTimeButton()));
    slotUpdateCommonTimeButton();
    m_explanatoryLabel = explanatoryLabel;

    setHelp("time-signature");
}

TimeSignature
TimeSignatureDialog::getTimeSignature() const
{
    KConfig *config = kapp->config();
    config->setGroup(GeneralOptionsConfigGroup);

    config->writeEntry("timesigdialogmakehidden", m_hideSignatureButton->isChecked());
    config->writeEntry("timesigdialogmakehiddenbars", m_hideBarsButton->isChecked());
    config->writeEntry("timesigdialogshowcommon", m_commonTimeButton->isChecked());
    config->writeEntry("timesigdialognormalize", m_normalizeRestsButton->isChecked());

    TimeSignature ts(m_timeSignature.getNumerator(),
                     m_timeSignature.getDenominator(),
                     (m_commonTimeButton &&
                      m_commonTimeButton->isEnabled() &&
                      m_commonTimeButton->isChecked()),
                     (m_hideSignatureButton &&
                      m_hideSignatureButton->isEnabled() &&
                      m_hideSignatureButton->isChecked()),
                     (m_hideBarsButton &&
                      m_hideBarsButton->isEnabled() &&
                      m_hideBarsButton->isChecked()));
    return ts;
}

void
TimeSignatureDialog::slotNumDown()
{
    int n = m_timeSignature.getNumerator();
    if (--n >= 1) {
        m_timeSignature = TimeSignature(n, m_timeSignature.getDenominator());
        m_numLabel->setText(TQString("%1").arg(n));
    }
    slotUpdateCommonTimeButton();
}

void
TimeSignatureDialog::slotNumUp()
{
    int n = m_timeSignature.getNumerator();
    if (++n <= 99) {
        m_timeSignature = TimeSignature(n, m_timeSignature.getDenominator());
        m_numLabel->setText(TQString("%1").arg(n));
    }
    slotUpdateCommonTimeButton();
}

void
TimeSignatureDialog::slotDenomDown()
{
    int n = m_timeSignature.getDenominator();
    if ((n /= 2) >= 1) {
        m_timeSignature = TimeSignature(m_timeSignature.getNumerator(), n);
        m_denomLabel->setText(TQString("%1").arg(n));
    }
    slotUpdateCommonTimeButton();
}

void
TimeSignatureDialog::slotDenomUp()
{
    int n = m_timeSignature.getDenominator();
    if ((n *= 2) <= 64) {
        m_timeSignature = TimeSignature(m_timeSignature.getNumerator(), n);
        m_denomLabel->setText(TQString("%1").arg(n));
    }
    slotUpdateCommonTimeButton();
}

void
TimeSignatureDialog::slotUpdateCommonTimeButton()
{
    if (m_explanatoryLabel)
        m_explanatoryLabel->hide();
    if (!m_hideSignatureButton || !m_hideSignatureButton->isChecked()) {
        if (m_timeSignature.getDenominator() == m_timeSignature.getNumerator()) {
            if (m_timeSignature.getNumerator() == 4) {
                m_commonTimeButton->setText(i18n("Display as common time"));
                m_commonTimeButton->setEnabled(true);
                return ;
            } else if (m_timeSignature.getNumerator() == 2) {
                m_commonTimeButton->setText(i18n("Display as cut common time"));
                m_commonTimeButton->setEnabled(true);
                return ;
            }
        }
    }
    m_commonTimeButton->setEnabled(false);
}

timeT
TimeSignatureDialog::getTime() const
{
    if (m_timeEditor) {
        return m_timeEditor->getTime();
    } else if (m_asGivenButton && m_asGivenButton->isChecked()) {
        return m_time;
    } else if (m_startOfBarButton && m_startOfBarButton->isChecked()) {
        int barNo = m_composition->getBarNumber(m_time);
        return m_composition->getBarStart(barNo);
    } else {
        return m_time;
    }
}

bool
TimeSignatureDialog::shouldNormalizeRests() const
{
    return (m_normalizeRestsButton && m_normalizeRestsButton->isEnabled() &&
            m_normalizeRestsButton->isChecked());
}

}
#include "TimeSignatureDialog.moc"