/*
 * Audacious - a cross-platform multimedia player
 * Copyright (c) 2007 Tomasz Moń
 * Copyright (c) 2011 John Lindgren
 *
 * Based on:
 * BMP - Cross-platform multimedia player
 * Copyright (C) 2003-2004  BMP development team.
 * XMMS:
 * Copyright (C) 1998-2003  XMMS development team.
 *
 * 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; under version 3 of the License.
 *
 * This program 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 this program;  If not, see <http://www.gnu.org/licenses>.
 */

#include <libaudcore/audstrings.h>
#include <libaudcore/equalizer.h>
#include <libaudcore/i18n.h>
#include <libaudcore/runtime.h>

#include "skins_cfg.h"
#include "main.h"
#include "skin.h"
#include "eq-slider.h"

#include "../ui-common/qt-compat.h"

void EqSlider::draw (QPainter & cr)
{
    int frame = 27 - m_pos * 27 / 50;
    if (frame < 14)
        skin_draw_pixbuf (cr, SKIN_EQMAIN, 13 + 15 * frame, 164, 0, 0, 14, 63);
    else
        skin_draw_pixbuf (cr, SKIN_EQMAIN, 13 + 15 * (frame - 14), 229, 0, 0, 14, 63);

    if (m_pressed)
        skin_draw_pixbuf (cr, SKIN_EQMAIN, 0, 176, 1, m_pos, 11, 11);
    else
        skin_draw_pixbuf (cr, SKIN_EQMAIN, 0, 164, 1, m_pos, 11, 11);
}

void EqSlider::moved (int pos)
{
    m_pos = aud::clamp (pos, 0, 50);
    if (m_pos == 24 || m_pos == 26)
        m_pos = 25;

    m_value = (float) (25 - m_pos) * AUD_EQ_MAX_GAIN / 25;

    if (m_band < 0)
        aud_set_double ("equalizer_preamp", m_value);
    else
        aud_eq_set_band (m_band, m_value);

    mainwin_show_status_message (str_printf ("%s: %+.1f dB", (const char *) m_name, m_value));
}

bool EqSlider::button_press (QMouseEvent * event)
{
    if (event->button () != Qt::LeftButton)
        return false;

    m_pressed = true;
    moved (QtCompat::y (event) / config.scale - 5);
    queue_draw ();
    return true;
}

bool EqSlider::button_release (QMouseEvent * event)
{
    if (event->button () != Qt::LeftButton)
        return false;

    if (! m_pressed)
        return true;

    m_pressed = false;
    moved (QtCompat::y (event) / config.scale - 5);
    queue_draw ();
    return true;
}

bool EqSlider::motion (QMouseEvent * event)
{
    if (! m_pressed)
        return true;

    moved (QtCompat::y (event) / config.scale - 5);
    queue_draw ();
    return true;
}

bool EqSlider::scroll (QWheelEvent * event)
{
    int delta = event->angleDelta ().y () / 60;
    moved (m_pos - delta);
    queue_draw ();
    return true;
}

void EqSlider::set_value (float value)
{
    if (m_pressed)
        return;

    m_value = value;
    m_pos = aud::clamp (25 - (int) (value * 25 / AUD_EQ_MAX_GAIN), 0, 50);
    queue_draw ();
}

EqSlider::EqSlider (const char * name, int band) :
    m_name (name),
    m_band (band)
{
    set_scale (config.scale);
    add_input (14, 63, true, true);
}
