bool wxGISDisplay::CanDraw(OGREnvelope &Env)
{
if(!IsDoubleEquil(m_dAngleRad, 0.0))
{
RotateEnvelope(Env, -m_dAngleRad, m_dRotatedBoundsCenterX, m_dRotatedBoundsCenterY);
}
return Env.Contains(m_CurrentBoundsRotated) || m_CurrentBoundsRotated.Contains(Env) || Env.Intersects(m_CurrentBoundsRotated);
}
bool wxGISDrawingLayer::Draw(wxGISEnumDrawPhase DrawPhase, ITrackCancel* const pTrackCancel)
{
wxCHECK_MSG(m_pDisplay, false, wxT("Display pointer is NULL"));
wxCriticalSectionLocker lock(m_CritSect);
OGREnvelope stDisplayExtentRotated = m_pDisplay->GetBounds(true);
OGREnvelope stFeatureDatasetExtentRotated = m_oLayerExtent;
//rotate featureclass extent
if (!IsDoubleEquil(m_pDisplay->GetRotate(), 0.0))
{
wxRealPoint dfCenter = m_pDisplay->GetBoundsCenter();
RotateEnvelope(stFeatureDatasetExtentRotated, m_pDisplay->GetRotate(), dfCenter.x, dfCenter.y);//dCenterX, dCenterY);
}
//if envelopes don't intersect exit
if (!stDisplayExtentRotated.Intersects(stFeatureDatasetExtentRotated))
return false;
//get intersect envelope to fill vector data
OGREnvelope stDrawBounds = stDisplayExtentRotated;
stDrawBounds.Intersect(stFeatureDatasetExtentRotated);
if (!stDrawBounds.IsInit())
return false;
IProgressor* pProgress = NULL;
if (NULL != pTrackCancel)
{
pProgress = pTrackCancel->GetProgressor();
}
if (NULL != pProgress)
{
pProgress->SetRange(m_aoShapes.size());
}
//draw shapes
for (size_t i = 0; i < m_aoShapes.size(); ++i)
{
if (NULL != pProgress)
{
pProgress->SetValue(i);
}
if (pTrackCancel != NULL && !pTrackCancel->Continue())
return true;
if (m_aoShapes[i] != NULL)
{
m_aoShapes[i]->Draw(m_pDisplay);
}
}
//draw enumGISShapeStateSelected
//draw enumGISShapeStateRotated
//draw enumGISShapeStatePoints
return true;
}