src/charts/ChartMarker.cpp


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#include "ChartMarker.h"
#include "ChartToolTip.h"

const QPointF ChartMarker::ToolTipOffset(45, -35);
const QColor ChartMarker::Color(Qt::blue);

ChartMarker::ChartMarker(const QPointF& center, const QString& toolTipText):
    radius(Radius), toolTip(NULL), toolTipText(toolTipText)
{
    setPos(center);
    setRect(QRectF(-HoverRadius, -HoverRadius,
        2 * HoverRadius, 2 * HoverRadius));
    setAcceptHoverEvents(true);
}

ChartMarker::~ChartMarker()
{
    delete toolTip;
}

void ChartMarker::hoverEnterEvent(QGraphicsSceneHoverEvent*)
{
    radius = HighlightedRadius;
    update();
    if(!toolTip)
        createToolTip();
    toolTip->show();
}

void ChartMarker::createToolTip()
{
    toolTip = new ChartToolTip(mapToScene(ToolTipOffset), toolTipText);
    scene()->addItem(toolTip);
    toolTip->adjustPos();
}

void ChartMarker::hoverLeaveEvent(QGraphicsSceneHoverEvent*)
{
    radius = Radius;
    update();
    toolTip->hide();
}

void ChartMarker::paint(QPainter* painter, const QStyleOptionGraphicsItem*,
    QWidget*)
{
    painter->setPen(Color);
    painter->setBrush(Color);
    painter->drawEllipse(QPointF(), radius, radius);
}