BrewPlot/qmllineitem.cpp

#include "qmllineitem.h"

QmlLineItem::QmlLineItem(QDeclarativeItem *parent) :
    QDeclarativeItem(parent), m_x1(0), m_y1(0), m_x2(0), m_y2(0),
    m_color(Qt::black), m_penWidth(1)
{
    setFlag(QGraphicsItem::ItemHasNoContents, false);
}

void QmlLineItem::paint(QPainter *painter,
                        const QStyleOptionGraphicsItem *option,
                        QWidget *widget)
{
    QPen pen(m_color, m_penWidth);
    painter->setPen(pen);
    if(smooth() == true)
    {
        painter->setRenderHint(QPainter::Antialiasing, true);
    }
    int x = qMin(m_x1, m_x2) - m_penWidth/2;
    int y = qMin(m_y1, m_y2) - m_penWidth/2;
    painter->drawLine(m_x1 - x, m_y1 - y, m_x2 - x, m_y2 - y);
}

int QmlLineItem::x1() const
{
    return m_x1;
}

int QmlLineItem::y1() const
{
    return m_y1;
}

int QmlLineItem::x2() const
{
    return m_x2;
}

int QmlLineItem::y2() const
{
    return m_y2;
}

QColor QmlLineItem::color() const
{
    return m_color;
}

int QmlLineItem::penWidth() const
{
    return m_penWidth;
}


void QmlLineItem::setX1(int x1)
{
    if(m_x1 == x1)
    {
        return;
    }
    m_x1 = x1;
    updateSize();
    emit x1Changed();
    update();
}

void QmlLineItem::setY1(int y1)
{
    if(m_y1 == y1)
    {
        return;
    }
    m_y1 = y1;
    updateSize();
    emit y1Changed();
    update();
}

void QmlLineItem::setX2(int x2)
{
    if(m_x2 == x2)
    {
        return;
    }
    m_x2 = x2;
    updateSize();
    emit x2Changed();
    update();
}

void QmlLineItem::setY2(int y2)
{
    if(m_y2 == y2)
    {
        return;
    }
    m_y2 = y2;
    updateSize();
    emit y2Changed();
    update();
}

void QmlLineItem::setColor(const QColor &color)
{
    if(m_color == color)
    {
        return;
    }
    m_color = color;
    emit colorChanged();
    update();
}

void QmlLineItem::setPenWidth(int newWidth)
{
    if(m_penWidth == newWidth)
    {
        return;
    }
    m_penWidth = newWidth;
    updateSize();
    emit penWidthChanged();
    update();
}

void QmlLineItem::updateSize()
{
    setX(qMin(m_x1, m_x2) - m_penWidth/2);
    setY(qMin(m_y1, m_y2) - m_penWidth/2);
    setWidth(qAbs(m_x2 - m_x1) + m_penWidth);
    setHeight(qAbs(m_y2 - m_y1) + m_penWidth);
}