HRESULT CCUILayoutHorizontal::Layout(IUIFrame* pHostFrame)
{
DEBUG_ASSERT(pHostFrame) ;
IF_RETURN(NULL == pHostFrame, E_INVALIDARG) ;
CSize szContainer(0, 0) ;
pHostFrame->GetSize(&szContainer) ;
CRect rcPadding(0, 0, 0, 0) ;
pHostFrame->GetPadding(&rcPadding) ;
CRect rcExtPadding(0, 0, 0, 0) ;
CComQIPtr<IUIFrameInternal> pFrameInternal = pHostFrame ;
if (pFrameInternal)
{
pFrameInternal->GetExtPadding(&rcExtPadding) ;
}
CRect rcContainer(0, 0, 0, 0) ;
rcContainer.left = rcPadding.left + rcExtPadding.left ;
rcContainer.top = rcPadding.top + rcExtPadding.top ;
rcContainer.right = szContainer.cx - rcPadding.right - rcExtPadding.right ;
rcContainer.bottom = szContainer.cy - rcPadding.bottom - rcExtPadding.bottom ;
INT nCurrentLayout = 0, nUsedSpace = 0 ;
if (LAYOUT::ORIENTATION_NEAR == this->m_nOrientation)
{
nCurrentLayout = rcPadding.left + rcExtPadding.left ;
}
else if (LAYOUT::ORIENTATION_FAR == this->m_nOrientation)
{
nCurrentLayout = szContainer.cx - rcPadding.right - rcExtPadding.right ;
}
LONG lChildrenCount = 0 ;
pHostFrame->GetChildrenCount(&lChildrenCount) ;
for (INT i = 0; i < lChildrenCount; ++i)
{
CComPtr<IUIElement> pElement ;
pHostFrame->GetChildByIndex(i, &pElement) ;
CComQIPtr<IUIFrame> pFrameChild = pElement ;
CComQIPtr<IUIFrameInternal> pFrameInternal = pElement ;
IF_CONTINUE(NULL == pFrameChild || NULL == pFrameInternal) ;
BOOL bHidden = FALSE ;
pFrameChild->GetHidden(&bHidden) ;
IF_CONTINUE(bHidden) ;
BOOL bFloat = FALSE ;
pFrameChild->GetFloat(&bFloat) ;
IF_CONTINUE(bFloat) ;
CRect rcChildMargin(0, 0, 0, 0) ;
pFrameChild->GetMargin(&rcChildMargin) ;
BOOL bChildHeightAsParent = FALSE ;
pFrameChild->GetHeightAsParent(&bChildHeightAsParent) ;
if (bChildHeightAsParent)
{
CSize szEstimateSize(0, 0) ;
szEstimateSize.cx = -1 ;
szEstimateSize.cy = rcContainer.Height() - rcChildMargin.top - rcChildMargin.bottom ;
pFrameInternal->SetEstimateSize(szEstimateSize) ;
}
BOOL bChildWidthAsParent = FALSE ;
pFrameChild->GetWidthAsParent(&bChildWidthAsParent) ;
if (i == this->m_nFillItem -1 || -1 * lChildrenCount + i == this->m_nFillItem)
{
INT nFillSize = this->CalcFillSize(pHostFrame, rcContainer, nUsedSpace, i) ;
CSize szEstimateSize(0, 0) ;
szEstimateSize.cx = nFillSize - rcChildMargin.left - rcChildMargin.right ;
szEstimateSize.cy = -1 ;
pFrameInternal->SetEstimateSize(szEstimateSize) ;
}
else if (bChildWidthAsParent)
{
pFrameInternal->SetEstimateSize(CSize(0, -1)) ;
}
CRect rcTarget(0, 0, 0, 0) ;
CSize szChildChild(0, 0) ;
pFrameChild->GetSize(&szChildChild) ;
nUsedSpace += szChildChild.cx + rcChildMargin.left + rcChildMargin.right ;
INT nDrift = DRIFT::DRIFT_NEAR ;
pFrameChild->GetDrift(&nDrift) ;
if (LAYOUT::ORIENTATION_NEAR == this->m_nOrientation)
{
if (DRIFT::DRIFT_NEAR == nDrift)
{
rcTarget.top = rcContainer.top + rcChildMargin.top ;
}
else if (DRIFT::DRIFT_FAR == nDrift)
{
rcTarget.top = rcContainer.bottom - rcChildMargin.bottom - szChildChild.cy ;
}
else if (DRIFT::DRIFT_MIDDLE == nDrift)
{
rcTarget.top = (rcContainer.Height() - szChildChild.cy)/2 + rcContainer.top ;
}
rcTarget.left = nCurrentLayout + rcChildMargin.left ;
rcTarget.right = rcTarget.left + szChildChild.cx ;
rcTarget.bottom = rcTarget.top + szChildChild.cy ;
nCurrentLayout += szChildChild.cx + rcChildMargin.left + rcChildMargin.right ;
}
else if (LAYOUT::ORIENTATION_FAR == this->m_nOrientation)
{
if (DRIFT::DRIFT_NEAR == nDrift)
{
rcTarget.top = rcContainer.top + rcChildMargin.top ;
}
else if (DRIFT::DRIFT_FAR == nDrift)
{
rcTarget.top = rcContainer.bottom - rcChildMargin.bottom - szChildChild.cy ;
}
else if (DRIFT::DRIFT_MIDDLE == nDrift)
{
rcTarget.top = (rcContainer.Height() - szChildChild.cy)/2 + rcContainer.top ;
}
rcTarget.right = nCurrentLayout - rcChildMargin.right ;
rcTarget.left = rcTarget.right - szChildChild.cx ;
rcTarget.bottom = rcTarget.top + szChildChild.cy ;
nCurrentLayout -= szChildChild.cx + rcChildMargin.left + rcChildMargin.right ;
}
pFrameInternal->SetLayoutRect(rcTarget) ;
}
return S_OK ;
}
