#include "rm_slider.h"

#include <QStyle>
#include <QStyleOption>
#include <QMouseEvent>
#include <QDebug>
#include <QPainter>
#include <QStylePainter>
#include "../rm_include.h"

RMSlider::RMSlider(QWidget *parent):
    QSlider(parent)
{
    setOrientation(Qt::Horizontal);
    setFocusPolicy(Qt::NoFocus);        // 처리해도 mouse wheel 은 처리안됨
}

RMSlider::~RMSlider()
{
}


inline int RMSlider::pick(const QPoint &pt) const
{
    return orientation() == Qt::Horizontal ? pt.x() : pt.y();
}
// Function copied from qslider.cpp and modified to make it compile
int RMSlider::pixelPosToRangeValue(int pos) const
{
    QStyleOptionSlider opt;
    initStyleOption(&opt);
    QRect gr = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderGroove, this);
    QRect sr = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, this);
    int sliderMin, sliderMax, sliderLength;
    if (orientation() == Qt::Horizontal) {
        sliderLength = sr.width();
        sliderMin = gr.x();
        sliderMax = gr.right() - sliderLength + 1;
    } else {
        sliderLength = sr.height();
        sliderMin = gr.y();
        sliderMax = gr.bottom() - sliderLength + 1;
    }
    return QStyle::sliderValueFromPosition(minimum(), maximum(), pos - sliderMin,
                                           sliderMax - sliderMin, opt.upsideDown);
}
// Based on code from qslider.cpp
void RMSlider::mousePressEvent(QMouseEvent *e)
{
    //LOG_TEST;
    //qInfo() << e;

    //qDebug("pressed (%d, %d)", e->pos().x(), e->pos().y());
    if (e->button() == Qt::LeftButton)
    {
        QStyleOptionSlider opt;
        initStyleOption(&opt);
        const QRect sliderRect = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, this);
        const QPoint center = sliderRect.center() - sliderRect.topLeft();
        // to take half of the slider off for the setSliderPosition call we use the center - topLeft

        // DRAG 처리
        bool bKnob = sliderRect.contains(e->pos());
        if (!bKnob)
        {
            e->accept();
            int v = pixelPosToRangeValue(pick(e->pos() - center));
            setSliderPosition(v);
            setRepeatAction(SliderNoAction);

            // KNOB 영역이 아닌 경우에도 이벤트 발생시키기 위해 처리
            emit sliderPressed();
        }
        else
        {
            QSlider::mousePressEvent(e);
        }

        // KNOB 클릭과 아닌 경우 구분하기 위해 사용 (비디오 이동시 pause 처리 등)
        emit sliderPressedWithKnob(bKnob);
    }
    else
    {
        QSlider::mousePressEvent(e);
    }
}

void RMSlider::wheelEvent(QWheelEvent *event)
{
    Q_UNUSED(event);
}
void RMSlider::mouseReleaseEvent(QMouseEvent *e)
{
    if (e->button() == Qt::LeftButton)
    {
        emit mouseReleased();
    }
    QSlider::mouseReleaseEvent(e);
}

RMReleasedSlider::RMReleasedSlider(QWidget *parent) : RMSlider(parent)
{

}
void RMReleasedSlider::mouseReleaseEvent(QMouseEvent *e)
{
    if (e->button() == Qt::LeftButton)
    {
        emit mouseReleased();
    }
    QSlider::mousePressEvent(e);
}
/*
void RMReleasedSlider::paintEvent(QPaintEvent *pe)
{
    Q_UNUSED(pe);

    QStylePainter p(this);
    QStyleOptionSlider opt;
    initStyleOption(&opt);

    int interval = tickInterval();
    if (interval == 0)
    {
        interval = pageStep();
    }

    if (tickPosition() != NoTicks && tickStrings.isEmpty() == false)
    {
        QFont font = p.font();
        font.setPixelSize(12);
        p.setFont(font);
        QRect handle = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, this);
        for (int i = minimum(); i <= maximum(); i += interval)
        {
            int x = ceil((double)((double)((double)(i - this->minimum()) / (double)(this->maximum() - this->minimum())) * (double)(this->width() - handle.width()) + (double)(handle.width() / 2.0))) - 1;

            p.setPen(QColor("#8F8F8F"));
            int y = this->rect().top()+4;
            p.drawLine(x, y, x, y + 10);

            p.setPen(QColor("#FFFFFF"));
            p.drawText(x-6,y+22,tickStrings[i]);
        }
    }

    // draw the slider (this is basically copy/pasted from QSlider::paintEvent)
    opt.subControls = QStyle::SC_SliderGroove | QStyle::SC_SliderHandle;
    p.drawComplexControl(QStyle::CC_Slider, opt);

// 실제 동작하지 않음  draw the slider handle
//    opt.subControls = QStyle::SC_SliderHandle;
//    p.drawComplexControl(QStyle::CC_Slider, opt);


}
*/