#include "rm_widget_zoom_pos.h"

#include <QPainter>
#include "../rm_include.h"
#include "../core/rm_math.h"

RMWidgetZoomPos::RMWidgetZoomPos(QWidget *parent) : QWidget(parent)
{
    _x = 0.25;
    _y = 0.25;
    _startX = 0.25;
    _startY = 0.25;
}
#if (USE_ZOOM_WH_RATIO)
void RMWidgetZoomPos::paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event);

    QPen pen(Qt::red);
    _painter.begin(this);
    _painter.setPen(pen);
    _painter.setRenderHint(QPainter::Antialiasing, false);

    // ROI 는 영상/화면 비율과 관계없으나 표시 영역은 관계가 있음.
    // 사용할 수 있는 넓이 = height * WHR (width/height ratio)
    int widthDiff = (size().width() - (int)(((double)size().height()) * _whr));
    //QRect max = QRect(widthDiff,0,size.width()-widthDiff,size().height());

    QSize s = QSize((size().width() - widthDiff)  / 2,size().height() / 2);

    // ROI 로 계산한 영역
    QRect box = QRect(_x * size().width() + (widthDiff / 2),_y * size().height(),s.width(),s.height());

    if(box.right() >= (size().width() - (widthDiff / 2)))
    {
       box = QRect(box.x() -(widthDiff / 2),box.y(),box.width(),box.height());
    }

    // 비디오 영역도 처리
    //box = QRectAspect(box,_whr);

    _painter.drawRect(box);
    _painter.end();
}
#else
void RMWidgetZoomPos::paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event);

    QPen pen(Qt::red);
    _painter.begin(this);
    _painter.setPen(pen);
    _painter.setRenderHint(QPainter::Antialiasing, false);
    QSize s = size() / 2;
    QRect box = QRect(_x * size().width(),_y * size().height(),s.width(),s.height());
    _painter.drawRect(box);
    _painter.end();
}
#endif // #if (USE_ZOOM_WH_RATIO)
void RMWidgetZoomPos::setPos(float x, float y)
{
    //qInfo() << whr;
    _x = MIN(MAX(_startX + x,0),0.5);
    _y = MIN(MAX(_startY + y,0),0.5);
    update();
}