/***************************************************************************
                          kradiodisplay.cpp  -  description
                             -------------------
    begin                : Mit Jan 29 2003
    copyright            : (C) 2003 by Martin Witte
    email                : witte@kawo1.rwth-aachen.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "../../src/include/utils.h"

#include <tqpainter.h>
#include <tqimage.h>
#include <tqpixmap.h>
#include <kimageeffect.h>  // fading, blending, ...
#include <kpixmapio.h>     // fast conversion between TQPixmap/TQImage
#include "radioview_frequencyradio.h"
#include "displaycfg.h"

RadioViewFrequencyRadio::RadioViewFrequencyRadio(TQWidget *parent, const TQString &name )
    : RadioViewElement(parent, name, clsRadioDisplay),
      m_power(false),
      m_valid(false),
      m_frequency(0),
      m_quality(0.0),
      m_stereo(false)
{
    setFrameStyle(Box | Sunken);
    setLineWidth(1);
    setMidLineWidth(1);


    // set some sensless default colors
    // real values are read in restoreState
    setDisplayColors(TQColor(20, 244, 20),
                     TQColor(10, 117, 10).light(75),
                     TQColor(10, 117, 10));
    setDisplayFont(TQFont("Helvetica"));

}


RadioViewFrequencyRadio::~RadioViewFrequencyRadio(){
}


float RadioViewFrequencyRadio::getUsability (Interface *i) const
{
    if (dynamic_cast<IFrequencyRadio*>(i))
        return 1.0;
    else
        return 0.0;
}


void   RadioViewFrequencyRadio::saveState (TDEConfig *config) const
{
    config->writeEntry("frequency-view-colorActiveText",   m_colorActiveText);
    config->writeEntry("frequency-view-colorInactiveText", m_colorInactiveText);
    config->writeEntry("frequency-view-colorButton",       m_colorButton);
    config->writeEntry("frequency-view-font",              m_font);
}


void   RadioViewFrequencyRadio::restoreState (TDEConfig *config)
{
    TQColor defaultActive  (20, 244, 20),
           defaultInactive(TQColor(10, 117, 10).light(75)),
           defaultButton  (10, 117, 10);
    TQFont  defaultFont ("Helvetica");
    TQColor a, b, c;
    TQFont  f;
    a = config->readColorEntry ("frequency-view-colorActiveText",
                                &defaultActive);
    b = config->readColorEntry ("frequency-view-colorInactiveText",
                                &defaultInactive);
    c = config->readColorEntry ("frequency-view-colorButton",
                                &defaultButton);
    f = config->readFontEntry  ("frequency-view-font",
                                &defaultFont);
    setDisplayColors(a, b, c);
    setDisplayFont(f);
}


ConfigPageInfo RadioViewFrequencyRadio::createConfigurationPage()
{
    DisplayConfiguration *a = new DisplayConfiguration(NULL);
    connectI(a);
    return ConfigPageInfo (a,
                           i18n("Frequency Display"),
                           i18n("Frequency Display"),
                           TQString()
                           );
}


// Interface

bool RadioViewFrequencyRadio::connectI(Interface *i)
{
    bool o = IDisplayCfg::connectI(i);
    bool c = ISoundStreamClient::connectI(i);
    if (dynamic_cast<IFrequencyRadio *>(i)) {

        bool a = IRadioDeviceClient::connectI(i);
        bool b = IFrequencyRadioClient::connectI(i);
        return o || a || b || c;

    } else {
        return o || c;
    }
}


bool RadioViewFrequencyRadio::disconnectI(Interface *i)
{
    // no check for IFrequencyRadio, it's just a disconnect

    bool a = IRadioDeviceClient::disconnectI(i);
    bool b = IFrequencyRadioClient::disconnectI(i);
    bool c = ISoundStreamClient::disconnectI(i);
    bool o = IDisplayCfg::disconnectI(i);

    return a || b || c || o;
}

void RadioViewFrequencyRadio::noticeConnectedI (ISoundStreamServer *s, bool pointer_valid)
{
    ISoundStreamClient::noticeConnectedI(s, pointer_valid);
    if (s && pointer_valid) {
        s->register4_notifySignalQualityChanged(this);
        s->register4_notifyStereoChanged(this);
    }
}

// IDisplayCfg

bool RadioViewFrequencyRadio::setDisplayColors(const TQColor &activeText,
                                               const TQColor &inactiveText,
                                               const TQColor &button)
{
    bool change = (activeText != m_colorActiveText || inactiveText != m_colorInactiveText || button != m_colorButton);

    m_colorActiveText   = activeText;
    m_colorInactiveText = inactiveText;
    m_colorButton       = button;

    TQPalette pl = palette();
    TQColorGroup cg = pl.inactive();

    TQBrush fg  = cg.brush(TQColorGroup::Foreground),
           btn = cg.brush(TQColorGroup::Button),
           lgt = cg.brush(TQColorGroup::Light),
           drk = cg.brush(TQColorGroup::Dark),
           mid = cg.brush(TQColorGroup::Mid),
           txt = cg.brush(TQColorGroup::Text),
           btx = cg.brush(TQColorGroup::BrightText),
           bas = cg.brush(TQColorGroup::Base),
           bg  = cg.brush(TQColorGroup::Background);

    fg.setColor (m_colorActiveText);
    btn.setColor(m_colorButton);
    lgt.setColor(m_colorButton.light(180));
    drk.setColor(m_colorButton.light( 50));
    mid.setColor(m_colorInactiveText);
    txt.setColor(m_colorActiveText);
    btx.setColor(m_colorActiveText);
    bas.setColor(m_colorButton);
    bg.setColor (m_colorButton);

    TQColorGroup ncg(fg, btn, lgt, drk, mid, txt, btx, bas, bg);
    pl.setInactive(ncg);
    pl.setActive(ncg);
    setPalette(pl);

    if (parentWidget() && parentWidget()->backgroundPixmap() ){
        KPixmapIO io;
        TQImage  i = io.convertToImage(*parentWidget()->backgroundPixmap());
        KImageEffect::fade(i, 0.5, colorGroup().color(TQColorGroup::Dark));
        setPaletteBackgroundPixmap(io.convertToPixmap(i));
        setBackgroundOrigin(WindowOrigin);
    } else {
        setBackgroundColor(colorGroup().color(TQColorGroup::Button));
    }

    if (change)
        notifyDisplayColorsChanged(m_colorActiveText, m_colorInactiveText, m_colorButton);
    return true;
}

bool RadioViewFrequencyRadio::setDisplayFont (const TQFont &f)
{
    if (m_font != f) {
        m_font = f;
        notifyDisplayFontChanged(m_font);
        RadioViewElement::setFont(f);
    }
    return true;
}

// IRadioDeviceClient


bool RadioViewFrequencyRadio::noticePowerChanged (bool on, const IRadioDevice */*sender*/)
{
    m_power = on;

    SoundStreamID ssid = queryCurrentSoundStreamID();
    float q = 0.0;
    bool  s = false;
    querySignalQuality(ssid, q);
    noticeSignalQualityChanged(ssid, q);
    queryIsStereo(ssid, s);
    noticeStereoChanged(ssid, s);

    repaint();
    return true;
}


bool RadioViewFrequencyRadio::noticeStationChanged (const RadioStation &, const IRadioDevice */*sender*/)
{
    return false;   // we don't care
}


bool RadioViewFrequencyRadio::noticeDescriptionChanged (const TQString &, const IRadioDevice */*sender*/)
{
    return false;   // we don't care
}


// IRadioSoundClient

bool RadioViewFrequencyRadio::noticeSignalQualityChanged(SoundStreamID id, float q)
{
    if (queryCurrentSoundStreamID() != id)
        return false;
    m_quality = q;
    repaint ();
    return true;
}


bool RadioViewFrequencyRadio::noticeStereoChanged(SoundStreamID id, bool  s)
{
    if (queryCurrentSoundStreamID() != id)
        return false;
    m_stereo = s;
    repaint ();
    return true;
}




// IFrequencyRadioClient


bool RadioViewFrequencyRadio::noticeFrequencyChanged(float f, const RadioStation *)
{
    m_frequency = f;
    repaint ();
    return true;
}


bool RadioViewFrequencyRadio::noticeMinMaxFrequencyChanged(float /*min*/, float /*max*/)
{
    return false;   // we don't care
}


bool RadioViewFrequencyRadio::noticeDeviceMinMaxFrequencyChanged(float /*min*/, float /*max*/)
{
    return false;   // we don't care
}


bool RadioViewFrequencyRadio::noticeScanStepChanged(float /*s*/)
{
    return false;   // we don't care
}



void RadioViewFrequencyRadio::drawContents(TQPainter *paint)
{
    if (!paint) return;

    TQRect r = contentsRect();

    int  margin = TQMAX(4, TQMIN(r.width() / 50, r.height() / 50)),
         tmp    = TQMIN(r.height(), (r.width() - 2*margin) / 4),
         xd_st  = TQMIN((r.height() - margin * 2) / 3, tmp/3),
         xw     = TQMIN(tmp / 2, xd_st * 3 / 2),
         penw   = TQMAX(1, xw / 25),
         xh_st = xd_st,
         xx_st = r.x() + margin + xw + 2 * margin + penw/2,
         xy_st = r.y() + margin + penw/2,

         xx_am = xx_st,
         xy_am = xy_st + xh_st + margin / 2,
         xh_am = (r.bottom() - margin - xy_am + 1 - margin/2) / 2,

         xx_fm = xx_am,
         xy_fm = xy_am + xh_am + margin/2,
         xh_fm = xh_am,

         xh_sg = r.height() - margin * 2,
         xx_sg = r.x() + margin,
         xy_sg = r.y() + margin;

    TQPen activePen (colorGroup().color(TQColorGroup::Text), penw);
    TQPen inactivePen (colorGroup().color(TQColorGroup::Mid), penw);
    TQBrush activeBrush = colorGroup().brush(TQColorGroup::Text);
    TQBrush inactiveBrush = colorGroup().brush(TQColorGroup::Mid);

    // draw stereo symbol
    paint->setPen(  (m_stereo && m_power) ? activePen : inactivePen);
    paint->drawArc((int)xx_st, (int)xy_st,
                   (int)(xd_st - penw), (int)(xd_st - penw),
                   0, 360*16);
    paint->drawArc((int)(xx_st + xd_st/2), (int)xy_st,
                   (int)(xd_st - penw), (int)(xd_st - penw),
                   0, 360*16);

    // draw signal quality symbol
    float cx = xx_sg,
          cy = xy_sg,
          cw = xw,
          ch = xw;

    float open_a = 30.0;
    // outer circle
    paint->setPen(  (m_quality > 0.75 && m_power) ? activePen : inactivePen);
    paint->drawArc((int)rint(cx),       (int)rint(cy),
                   (int)rint(cw),       (int)rint(ch),
                   (int)(-90+open_a)*16, (int)(360 - 2*open_a)*16
                   );

    // mid circle
    paint->setPen(  (m_quality > 0.50 && m_power) ? activePen : inactivePen);
    cx += (float)xw/5.0;  cy += (float)xw/5.0;
    cw -= (float)xw/2.5;  ch -= (float)xw/2.5;
    paint->drawArc((int)rint(cx),       (int)rint(cy),
                   (int)rint(cw),       (int)rint(ch),
                   (int)(-90+open_a)*16, (int)(360 - 2*open_a)*16
                   );

    // inner circle
    paint->setPen(  (m_quality > 0.25 && m_power) ? activePen : inactivePen);
    cx += (float)xw/5.0;  cy += (float)xw/5.0;
    cw -= (float)xw/2.5;  ch -= (float)xw/2.5;
    paint->drawArc((int)rint(cx),       (int)rint(cy),
                   (int)rint(cw),       (int)rint(ch),
                   (int)(-90+open_a)*16, (int)(360 - 2*open_a)*16
                   );

    // triangle
    TQPen tmppen =   (m_quality > 0.1 && m_power) ? activePen : inactivePen;
    tmppen.setWidth(1);
    paint->setPen(tmppen);
    paint->setBrush(  (m_quality > 0.1 && m_power) ? activeBrush : inactiveBrush);
    TQPointArray pts(3);
    pts.setPoint(0, (int)(xx_sg + xw / 4),  (int)(xy_sg + xh_sg - penw/2));
    pts.setPoint(1, (int)(xx_sg + xw *3/4), (int)(xy_sg + xh_sg - penw/2));
    pts.setPoint(2, (int)(xx_sg + xw / 2),  (int)(xy_sg + xw/2  + penw));
    paint->drawConvexPolygon(pts);



    // AM/FM display

    TQFont f = m_font;
    paint->setPen (  (m_frequency <= 10 && m_power) ? activePen : inactivePen);
    f.setPixelSize(xh_am);
    paint->setFont(f);
    paint->drawText(xx_am, xy_am + xh_am - 1, i18n("AM"));
    int xw_am = TQFontMetrics(f).width(i18n("AM"));

    paint->setPen (  (m_frequency > 10 && m_power) ? activePen : inactivePen);
    f.setPixelSize(xh_fm);
    paint->setFont(f);
    paint->drawText(xx_fm, xy_fm + xh_fm - 1, i18n("FM"));
    int xw_fm = TQFontMetrics(f).width(i18n("FM"));

    int xx_f = TQMAX(xx_fm + xw_fm, TQMAX(xw_am + xx_am, TQMAX(xx_st + xw, xw + xx_sg))) + margin,
        xy_f = r.y() + margin,
        xw_f = r.right() - margin - xx_f + 1,
        xh_f = r.bottom() - margin - xy_f + 1;

    // Frequency Display

    TQString s;
    if (m_frequency < 10) {
        s = i18n("%1 kHz").arg(TDEGlobal::locale()->formatNumber((int)(m_frequency * 1000), 0));
    } else {
        s = i18n("%1 MHz").arg(TDEGlobal::locale()->formatNumber(m_frequency, 2));
    }

    float pxs = xh_f;
    paint->setPen (  m_power ? activePen : inactivePen);
    f.setPixelSize((int)pxs);
    int n = 30;
    while (1) {
        TQFontMetrics fm(f);
        int sw = fm.boundingRect(xx_f, xy_f, xw_f, xh_f, TQt::AlignRight | TQt::AlignVCenter, s).width();
        if (sw <= xw_f || --n <= 0) break;

        float fact = (float)xw_f / (float)sw;
        pxs = TQMIN(pxs - 1, pxs * fact);
        f.setPixelSize(TQMAX(1,(int)pxs));
    }
    paint->setFont(f);
    paint->drawText(xx_f, xy_f, xw_f, xh_f, TQt::AlignRight | TQt::AlignVCenter, s);
}






void RadioViewFrequencyRadio::reparent (TQWidget *prnt,
                                        WFlags f,
                                        const TQPoint &p,
                                        bool showIt)
{
    RadioViewElement::reparent(prnt, f, p, showIt);
    setDisplayColors(m_colorActiveText, m_colorInactiveText, m_colorButton);
}


#include "radioview_frequencyradio.moc"