void DoPaint()
{
RECT rcClient = { 0 };
::GetClientRect(m_hWnd, &rcClient);
DWORD dwWidth = rcClient.right - rcClient.left;
DWORD dwHeight = rcClient.bottom - rcClient.top;
HDC hDcPaint = ::GetDC(m_hWnd);
HDC hDcBackground = ::CreateCompatibleDC(hDcPaint);
COLORREF* pBackgroundBits;
HBITMAP hbmpBackground = CreateMyBitmap(hDcPaint, dwWidth, dwHeight, &pBackgroundBits);
::ZeroMemory(pBackgroundBits, dwWidth * dwHeight * 4);
HBITMAP hOldBitmap = (HBITMAP)::SelectObject(hDcBackground, hbmpBackground);
SetBkMode(hDcBackground, OPAQUE);
m_pm.GetRoot()->SetPos(rcClient);
m_pm.GetRoot()->DoPaint(hDcBackground, rcClient);
PaintArrow(hDcBackground, rcClient);
ResetAlpha((BYTE*)pBackgroundBits, dwWidth, dwHeight);
RECT rcWnd = { 0 };
::GetWindowRect(m_hWnd, &rcWnd);
BLENDFUNCTION bf = { AC_SRC_OVER, 0, 255, AC_SRC_ALPHA };
POINT ptPos = { rcWnd.left, rcWnd.top };
SIZE sizeWnd = { dwWidth, dwHeight };
POINT ptSrc = { 0, 0 };
UpdateLayeredWindow(m_hWnd, hDcPaint, &ptPos, &sizeWnd, hDcBackground, &ptSrc, 0, &bf, ULW_ALPHA);
::SelectObject(hDcBackground, hOldBitmap);
if (hDcBackground != NULL) ::DeleteDC(hDcBackground);
if (hbmpBackground != NULL) ::DeleteObject(hbmpBackground);
::ReleaseDC(m_hWnd, hDcPaint);
}
void TVizMapContext::PaintLinks(PGks Gks) {
int Links = VizMapFrame->GetLinks();
//InfoNotify(TStr::Fmt("Links %d", Links));
TFltRect ZoomRect = GetZoomRect();
for (int LinkN = 0; LinkN < Links; LinkN++) {
PVizMapLink Link = VizMapFrame->GetLink(LinkN);
//if (!SelPointV.IsInBin(Link->GetSrcPointN()) &&
// !SelPointV.IsInBin(Link->GetDstPointN())) { continue; }
// get link coordinates
PVizMapPoint SrcPoint = VizMapFrame->GetPoint(Link->GetSrcPointN());
PVizMapPoint DstPoint = VizMapFrame->GetPoint(Link->GetDstPointN());
const double SrcPointX = SrcPoint->GetPointX(), SrcPointY = SrcPoint->GetPointY();
const double DstPointX = DstPoint->GetPointX(), DstPointY = DstPoint->GetPointY();
//TODO: check if link crosses ZoomRect
// get coordinates in pixels
const int SrcX = GetScreenCoord(SrcPointX, ZoomRect.GetMnX(),
ZoomRect.GetXLen(), Gks->GetWidth());
const int SrcY = GetScreenCoord(SrcPointY, ZoomRect.GetMnY(),
ZoomRect.GetYLen(), Gks->GetHeight());
const int DstX = GetScreenCoord(DstPointX, ZoomRect.GetMnX(),
ZoomRect.GetXLen(), Gks->GetWidth());
const int DstY = GetScreenCoord(DstPointY, ZoomRect.GetMnY(),
ZoomRect.GetYLen(), Gks->GetHeight());
// draw arrow
PaintArrow(Gks, SrcX, SrcY, DstX, DstY, 3);
}
}
