virtual void UpdateChildrenPosition()
{
CRect rcClient = GetClientRect();
rcClient.DeflateRect(m_rcMargin.left,m_rcMargin.top,m_rcMargin.right,m_rcMargin.bottom);
SWindow *pChild = GetWindow(GSW_FIRSTCHILD);
CRect rcItem = rcClient;
rcItem.bottom = rcItem.top;
while(pChild)
{
CSize szItem = pChild->GetDesiredSize(rcClient);
rcItem.top = rcItem.bottom;
rcItem.bottom += szItem.cy;
pChild->Move(rcItem);
pChild = pChild->GetWindow(GSW_NEXTSIBLING);
}
}
//nWidth,nHeight == -1:wrap_content
CSize SLinearLayout::MeasureChildren(SWindow * pParent,int nWidth,int nHeight) const
{
CSize *pSize = new CSize [pParent->GetChildrenCount()];
ILayoutParam * pParentLayoutParam = pParent->GetLayoutParam();
int iChild = 0;
SWindow *pChild = pParent->GetNextLayoutChild(NULL);
while(pChild)
{
SLinearLayoutParam *pLinearLayoutParam = pChild->GetLayoutParamT<SLinearLayoutParam>();
int nScale = pChild->GetScale();
CSize szChild(SIZE_WRAP_CONTENT,SIZE_WRAP_CONTENT);
if(pLinearLayoutParam->IsMatchParent(Horz))
{
if(!pParentLayoutParam->IsWrapContent(Horz))
szChild.cx = nWidth;
}
else if(pLinearLayoutParam->IsSpecifiedSize(Horz))
{
szChild.cx = pLinearLayoutParam->GetSpecifiedSize(Horz).toPixelSize(nScale);
szChild.cx += pLinearLayoutParam->extend_left.toPixelSize(nScale) + pLinearLayoutParam->extend_right.toPixelSize(nScale);
}
if(pLinearLayoutParam->IsMatchParent(Vert))
{
if(!pParentLayoutParam->IsWrapContent(Vert))
szChild.cy = nHeight;
}
else if(pLinearLayoutParam->IsSpecifiedSize(Vert))
{
szChild.cy = pLinearLayoutParam->GetSpecifiedSize(Vert).toPixelSize(nScale);
szChild.cy += pLinearLayoutParam->extend_top.toPixelSize(nScale) + pLinearLayoutParam->extend_bottom.toPixelSize(nScale);
}
if(szChild.cx == SIZE_WRAP_CONTENT || szChild.cy == SIZE_WRAP_CONTENT)
{
int nWid = szChild.cx, nHei = szChild.cy;
if(nWid == SIZE_WRAP_CONTENT)
nWid = nWidth * pParentLayoutParam->IsWrapContent(Horz)?-1:1; //把父窗口的WrapContent属性通过-1标志传递给GetDesiredSize
if(nHei == SIZE_WRAP_CONTENT)
nHei = nHeight * pParentLayoutParam->IsWrapContent(Vert)?-1:1;//把父窗口的WrapContent属性通过-1标志传递给GetDesiredSize
CSize szCalc = pChild->GetDesiredSize(nWid,nHei);
if(szChild.cx == SIZE_WRAP_CONTENT)
{
szChild.cx = szCalc.cx;
szChild.cx += pLinearLayoutParam->extend_left.toPixelSize(nScale) + pLinearLayoutParam->extend_right.toPixelSize(nScale);
}
if(szChild.cy == SIZE_WRAP_CONTENT)
{
szChild.cy = szCalc.cy;
szChild.cy += pLinearLayoutParam->extend_top.toPixelSize(nScale) + pLinearLayoutParam->extend_bottom.toPixelSize(nScale);
}
}
pSize [iChild++] = szChild;
pChild = pParent->GetNextLayoutChild(pChild);
}
CSize szRet;
for(int i=0;i<iChild;i++)
{
if(m_orientation == Horz)
{
szRet.cx += pSize[i].cx;
szRet.cy = (std::max)(szRet.cy,pSize[i].cy);
}else
{
szRet.cx = (std::max)(szRet.cx,pSize[i].cx);
szRet.cy += pSize[i].cy;
}
}
delete []pSize;
return szRet;
}
