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#include?“callout.h“
#include?
#include?
#include?
#include?
#include?

Callout::Callout（QChart?*chart）:
????QGraphicsItem（chart）
????m_chart（chart）
{
}

QRectF?Callout::boundingRect（）?const
{
????QPointF?anchor?=?mapFromParent（m_chart->mapToPosition（m_anchor））;
????QRectF?rect;
????rect.setLeft（qMin（m_rect.left（）?anchor.x（）））;
????rect.setRight（qMax（m_rect.right（）?anchor.x（）））;
????rect.setTop（qMin（m_rect.top（）?anchor.y（）））;
????rect.setBottom（qMax（m_rect.bottom（）?anchor.y（）））;
????return?rect;
}

void?Callout::paint（QPainter?*painter?const?QstyleOptionGraphicsItem?*option?QWidget?*widget）
{
????Q_UNUSED（option）
????Q_UNUSED（widget）
????QPainterPath?path;
????path.addRoundedRect（m_rect?5?5）;

????QPointF?anchor?=?mapFromParent（m_chart->mapToPosition（m_anchor））;
????if?（!m_rect.contains（anchor））?{
????????QPointF?point1?point2;

????????//?establish?the?position?of?the?anchor?point?in?relation?to?m_rect
????????bool?above?=?anchor.y（）?<=?m_rect.top（）;
????????bool?aboveCenter?=?anchor.y（）?>?m_rect.top（）?&&?anchor.y（）?<=?m_rect.center（）.y（）;
????????bool?belowCenter?=?anchor.y（）?>?m_rect.center（）.y（）?&&?anchor.y（）?<=?m_rect.bottom（）;
????????bool?below?=?anchor.y（）?>?m_rect.bottom（）;

????????bool?onLeft?=?anchor.x（）?<=?m_rect.left（）;
????????bool?leftOfCenter?=?anchor.x（）?>?m_rect.left（）?&&?anchor.x（）?<=?m_rect.center（）.x（）;
????????bool?rightOfCenter?=?anchor.x（）?>?m_rect.center（）.x（）?&&?anchor.x（）?<=?m_rect.right（）;
????????bool?onRight