/*
 *  This file is part of seq66.
 *
 *  seq66 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.
 *
 *  seq66 is distributed in the hope that it will be useful, but WITHOUT ANY
 *  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 *  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 *  details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with seq66; if not, write to the Free Software Foundation, Inc., 59 Temple
 *  Place, Suite 330, Boston, MA  02111-1307  USA
 */

/**
 * \file          qclocklayout.cpp
 *
 *  This class supports a MIDI Clocks label and a set of radio-buttons for
 *  selecting the clock style (off, on POS, on MOD), associating it with a
 *  particular output buss.
 *
 * \library       seq66 application
 * \author        Chris Ahlstrom
 * \date          2018-05-19
 * \updates       2026-08-05
 * \license       GNU GPLv2 or above
 *
 *  This class represents one line in the Edit Preferences MIDI Clocks tab.
 */

#include "play/performer.hpp"           /* seq66::performer class           */
#include "gui/qseditoptions.hpp"        /* seq66::qseditoptions class       */
#include "qclocklayout.hpp"             /* seq66::qclocklayout class        */
#include "qt5_helpers.hpp"              /* seq66::qt() string conversion    */

namespace seq66
{

static const size_t c_max_name_length = 48;    /* 40, 32 */

/**
 *  Creates a single line in the MIDI Clocks "Clock" group-box.  We will use
 *  the words "clock" or "port" for the MIDI output port represented by this
 *  widget.  Here are the jobs we have to do:
 *
 *      -#  Get the label for the port and set it.
 *      -#  Add the tooltips for the clock radio-buttons.
 *      -#  Add the clock radio-buttons to m_horizlayout_clocklive.
 *        -#    Connect to the radio-button slots:
 *            -    clock_callback_disable().
 *            -    clock_callback_off().
 *            -    clock_callback_on().
 *            -    clock_callback_mod().
 */

qclocklayout::qclocklayout (QWidget * parent, performer & p, int bus) :
    qportwidget                 (parent, p, bus),
    m_horizlayout_clockline     (nullptr),
    m_spacer_clock              (nullptr),
    m_label_outputbusname       (nullptr),
    m_rbutton_portdisabled      (nullptr),
    m_rbutton_clockoff          (nullptr),
    m_rbutton_clockonpos        (nullptr),
    m_rbutton_clockonmod        (nullptr),
    m_rbutton_group             (nullptr)
{
    setup_ui();                         /* defined below, not in .h/.hpp    */

    /*
     * Obsolete in Qt 6:
     */

#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)

    auto lambdafunc = [this] (QAbstractButton * abutton)
    {
        clock_callback_clicked(m_rbutton_group->id(abutton));
    };
    connect(m_rbutton_group, &QButtonGroup::buttonClicked, lambdafunc);

#else

    connect
    (
        m_rbutton_group, SIGNAL(buttonClicked(int)),
        this, SLOT(clock_callback_clicked(int))
    );

#endif

}

/**
 *  The tool-tips.
 *
 *  "This setting disables the usage of this output port, completely."
 *  "It is needed in some cases for devices that are detected, but "
 *  "cannot be used (e.g. devices locked by another application)."
 *
 *  "MIDI Clock will be disabled. Used for conventional playback."
 *
 *  "MIDI Clock will be sent. MIDI Song Position and MIDI Continue "
 *  "will be sent if starting after tick 0 in song mode; otherwise "
 *  "MIDI Start is sent."
 *
 *  "MIDI Clock will be sent.  MIDI Start will be sent and clocking "
 *  "will begin once the song position has reached the modulo of "
 *  "the specified Size. Use for gear that doesn't respond to Song "
 *  "Position."
 */

void
qclocklayout::setup_ui ()
{
    std::string busname;
    e_clock clocking;
    bool gotbussinfo = perf().ui_get_clock(bus(), clocking, busname, false);
    if (gotbussinfo)
    {
        if (busname.length() > c_max_name_length)
            busname = busname.substr(0, c_max_name_length);

        m_horizlayout_clockline = new QHBoxLayout();
        m_horizlayout_clockline->setContentsMargins(0, 0, 0, 0);
        m_spacer_clock = new QSpacerItem
        (
            2, 0, QSizePolicy::MinimumExpanding, QSizePolicy::Minimum
        );

        QString qbname = qt(busname);
        m_label_outputbusname = new QLabel();
        m_label_outputbusname->setText(qbname);
        m_rbutton_portdisabled = new QRadioButton("Disabled");
        m_rbutton_clockoff = new QRadioButton("Off");
        m_rbutton_clockonpos = new QRadioButton("On:Pos");
        m_rbutton_clockonmod = new QRadioButton("On:Mod");
        m_rbutton_group = new QButtonGroup(this);
        m_rbutton_group->addButton
        (
            m_rbutton_portdisabled, int(e_clock::disabled)
        );
        m_rbutton_group->addButton(m_rbutton_clockoff, int(e_clock::none));
        m_rbutton_group->addButton(m_rbutton_clockonpos, int(e_clock::pos));
        m_rbutton_group->addButton(m_rbutton_clockonmod, int(e_clock::mod));
        m_horizlayout_clockline->addWidget(m_label_outputbusname);
        m_horizlayout_clockline->addItem(m_spacer_clock);
        m_horizlayout_clockline->addWidget(m_rbutton_portdisabled);
        m_horizlayout_clockline->addWidget(m_rbutton_clockoff);
        m_horizlayout_clockline->addWidget(m_rbutton_clockonpos);
        m_horizlayout_clockline->addWidget(m_rbutton_clockonmod);

        bool unavailable = perf().is_port_unavailable
        (
            bus(), midibase::io::output
        );
        if (unavailable)
        {
            m_label_outputbusname->setEnabled(false);
            m_rbutton_portdisabled->setChecked(true);
            m_rbutton_portdisabled->setEnabled(false);
            m_rbutton_clockoff->setChecked(false);
            m_rbutton_clockoff->setEnabled(false);
            m_rbutton_clockonpos->setEnabled(false);
            m_rbutton_clockonmod->setEnabled(false);

            /*
             * Overridden by the Clock tab's tooltip.
             *
             * m_rbutton_portdisabled->setToolTip("Port is unavailable");
             */
        }
        else
        {
            switch (clocking)
            {
            case e_clock::unavailable:

                m_label_outputbusname->setEnabled(false);
                m_rbutton_portdisabled->setChecked(true);
                m_rbutton_portdisabled->setEnabled(false);
                m_rbutton_clockonpos->setEnabled(false);
                m_rbutton_clockonmod->setEnabled(false);
                break;

            case e_clock::disabled:

                m_label_outputbusname->setEnabled(true);
                m_rbutton_portdisabled->setChecked(true);
                m_rbutton_portdisabled->setEnabled(true);
                m_rbutton_clockonpos->setEnabled(true);
                m_rbutton_clockonmod->setEnabled(true);
                break;

            case e_clock::none:

                m_label_outputbusname->setEnabled(true);
                m_rbutton_clockoff->setChecked(true);
                break;

            case e_clock::pos:

                m_label_outputbusname->setEnabled(true);
                m_rbutton_clockonpos->setChecked(true);
                break;

            case e_clock::mod:

                m_label_outputbusname->setEnabled(true);
                m_rbutton_clockonmod->setChecked(true);
                break;

            case e_clock::max:      /* will never occur */

                break;
            }
        }
    }
}

/**
 *  Sets the clocking value based on in incoming parameter.  We have to use
 *  this particular slot in order to handle all of the radio-buttons.
 *
 * \param id
 *      Provides the ID code of the button that was clicked.  We set these ID
 *      values explicitly, via addButton(ptrbutton, int(e_clock::disabled)).
 *      For some reason, probably because -1 is a special flag for this
 *      callback, -1 [e_clock::disabled] gets converted to -2.  So we have to
 *      adjust.
 */

void
qclocklayout::clock_callback_clicked (int id)
{
    if (id == (-2))
        id = (-1);                              /* e_clock::disabled        */

    e_clock clocking = int_to_clock(id);        /* static_cast<e_clock>(id) */
    bool enable = port_active(clocking);        /* e_clock::disabled        */
    perf().ui_set_clock(bus(), clocking);
    m_label_outputbusname->setEnabled(enable);
    m_rbutton_portdisabled->setEnabled(enable);
    m_rbutton_clockoff->setEnabled(true);
    m_rbutton_clockonpos->setEnabled(enable);
    m_rbutton_clockonmod->setEnabled(enable);
    parent_widget()->enable_bus_item(bus(), enable);    /* tell the parent  */
}

}           // namespace seq66

/*
 * qclocklayout.cpp
 *
 * vim: sw=4 ts=4 wm=4 et ft=cpp
 */
