src/charts/ChartToolTip.cpp


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#include "ChartToolTip.h"

const QFont ChartToolTip::Font("Sans Serif", 11);

ChartToolTip::ChartToolTip(const QPointF& pos, const QString& text):
    text(text)
{
    setPos(pos);
    document.setDefaultFont(Font);
    document.setHtml(text);
    QSizeF docSize = document.size();
    setRect(QRectF(QPointF(-docSize.width() / 2, -docSize.height() / 2), docSize));
}

void ChartToolTip::paint(QPainter* painter, const QStyleOptionGraphicsItem*,
    QWidget*)
{
    drawFrame(painter);
    drawText(painter);
}

void ChartToolTip::drawFrame(QPainter* painter)
{
    painter->setPen(QPen(Qt::black));
    painter->setBrush(QBrush(Qt::white));
    painter->drawRect(rect());
}

void ChartToolTip::drawText(QPainter* painter)
{
    painter->translate(rect().topLeft());
    document.drawContents(painter);
}

void ChartToolTip::adjustPos()
{
    QRectF toolTipRect = mapRectToScene(boundingRect());
    QRectF sceneRect = scene()->sceneRect();
    if(toolTipRect.right() >= sceneRect.right())
        moveBy(-(toolTipRect.right() - sceneRect.right()) - 1, 0);
    if(toolTipRect.top() <= sceneRect.top())
        moveBy(0, sceneRect.top() - toolTipRect.top() + 1);
}