void Sprite::OnDraw( Gdiplus::Graphics &g, const Gdiplus::RectF &rcDirty )
{
if (!m_bVisible)
{
return; // 子节点也不会被绘制
}
// 前序遍历 让父节点先绘制
//Gdiplus::RectF rc = GetRect();
//if (10 == rc.Width && 10 == rc.Height)
//{
// LOGW(<<L"Orignal Size 10 10"); // 检查下有没有多余的重绘
//}
if (m_bClipChildren)
{
Gdiplus::RectF rcClip = GetRect();
rcClip.X = 0.0f;
rcClip.Y = 0.0f;
g.SetClip(rcClip);
}
PaintEvent ev;
ev.graphics = &g;
ev.rcDirty = rcDirty;
SendNotify(ePaint, &ev);
//this->ClientDraw(g, rcDirty);
Sprite *sp = m_firstChild;
while(sp)
{
// 如果需要重绘部分矩形和sp相交则重画它 否则不重画
// 这里还有个问题就是 父矩形必须比子矩形要大 否则可能父的相交不到 而子的相交的到
// 可能要强制这一原理 类似于浏览器 会撑大
Gdiplus::RectF rc2 = sp->GetRect();
Gdiplus::RectF rcAbs = sp->GetAbsRect();
rcAbs.X -= 0.5f; // FIXME 有时无法得到重画导致边界1像素消失
rcAbs.Y -= 0.5f;
rcAbs.Width += 1.0f;
rcAbs.Height += 1.0f;
if (rcDirty.IntersectsWith(rcAbs))
{
g.TranslateTransform(rc2.X, rc2.Y);
sp->OnDraw(g, rcDirty);
g.TranslateTransform(-rc2.X, -rc2.Y);
}
sp = sp->m_nextSibling;
}
if (m_bClipChildren)
{
g.ResetClip();
}
}
// http://blog.csdn.net/magic_feng/article/details/6618206
Sprite * Sprite::DispatchMouseEvent(MouseEvent *event)
{
std::stack<Sprite *> stack;
std::stack<Sprite *> reverse;
stack.push(this);
Sprite *sp = NULL;
while(!stack.empty())
{
sp = stack.top();
stack.pop();
reverse.push(sp); // visit in reversed order.
Sprite *sp2 = sp->m_lastChild;
while (sp2)
{
stack.push(sp2);
sp2 = sp2->m_prevSibling;
}
}
while (!reverse.empty())
{
sp = reverse.top();
reverse.pop();
Gdiplus::RectF rc = sp->GetAbsRect();
//LOG("HitTest:"<< rc.X << "," <<rc.Y << "," << rc.Width << "," << rc.Height);
if (rc.Contains(event->x, event->y))
{
MouseEvent e2 = *event;
e2.x -= rc.X;
e2.y -= rc.Y;
sp->OnMouseEvent(g_L, &e2);
}
}
return NULL;
}
