void SItemPanel::OnRedraw(const CRect &rc)
{
if(m_pFrmHost->IsUpdateLocked()) return;
CRect rcItem=GetItemRect();
if(!rcItem.IsRectNull() && m_pFrmHost->IsVisible(TRUE))
{
if(m_pItemContainer->IsItemRedrawDelay())
{
CRect rc2(rc);
rc2.OffsetRect(rcItem.TopLeft());
rc2.IntersectRect(rc2,rcItem);
CRect rcHostClient = m_pFrmHost->GetClientRect();
rc2.IntersectRect(rc2,rcHostClient);
m_pFrmHost->InvalidateRect(rc2);
}else
{
IRenderTarget *pRT=OnGetRenderTarget(rc,OLEDC_PAINTBKGND);
CAutoRefPtr<IRegion> rgn;
GETRENDERFACTORY->CreateRegion(&rgn);
rgn->CombineRect(&rc,RGN_COPY);
RedrawRegion(pRT,rgn);
OnReleaseRenderTarget(pRT,rc,OLEDC_PAINTBKGND);
}
}
}
HRESULT RichEditOleBase::Draw(
DWORD dwDrawAspect,
LONG lindex,
void *pvAspect,
DVTARGETDEVICE *ptd,
HDC hdcTargetDev,
HDC hdcDraw,
LPCRECTL lprcBounds,
LPCRECTL lprcWBounds,
BOOL ( STDMETHODCALLTYPE *pfnContinue )(ULONG_PTR dwContinue),
ULONG_PTR dwContinue)
{
InvertBorder(hdcDraw, (RECT*)lprcBounds);
m_rcObj = (RECT*)lprcBounds;
m_rcObj.InflateRect(-1,-1,-1,-1); // 四周留一个像素给RichEdit画反色框
m_oleWindow.SetOleWindowRect(m_rcObj);
CAutoRefPtr<IRegion> rgn;
GETRENDERFACTORY->CreateRegion(&rgn);
rgn->CombineRect((RECT*)lprcBounds,RGN_AND);
CAutoRefPtr<IRenderTarget> pRT;
GETRENDERFACTORY->CreateRenderTarget(&pRT, m_rcObj.Width(), m_rcObj.Height());
// 画背景
HDC hdc = pRT->GetDC(0);
::BitBlt(hdc, 0, 0, m_rcObj.Width(), m_rcObj.Height(),
hdcDraw, m_rcObj.left, m_rcObj.top,
SRCCOPY);
// 画richedit
m_oleWindow.RedrawRegion(pRT, rgn);
// 贴到目标DC
::BitBlt(hdcDraw, m_rcObj.left, m_rcObj.top, m_rcObj.Width(), m_rcObj.Height(),
hdc, 0, 0,
SRCCOPY);
pRT->ReleaseDC(hdc);
return S_OK;
}