void CRevisionGraphWnd::DrawStripes (GraphicsDevice& graphics, const CSize& offset)
{
// we need to fill this visible area of the the screen
// (even if there is graph in that part)
RectF clipRect;
if (graphics.graphics)
graphics.graphics->GetVisibleClipBounds (&clipRect);
// don't show stripes if we don't have multiple roots
CSyncPointer<const ILayoutRectList> trees (m_state.GetTrees());
if (trees->GetCount() < 2)
return;
// iterate over all trees
for ( index_t i = 0, count = trees->GetCount(); i < count; ++i)
{
// screen coordinates covered by the tree
CRect tree = trees->GetRect(i);
REAL left = tree.left * m_fZoomFactor;
REAL right = tree.right * m_fZoomFactor;
RectF rect ( left - offset.cx
, clipRect.Y
, i+1 == count ? clipRect.Width : right - left
, clipRect.Height);
// relevant?
if (rect.IntersectsWith (clipRect))
{
// draw the background stripe
Color color ( (i & 1) == 0
? m_Colors.GetColor (CColors::gdpStripeColor1)
: m_Colors.GetColor (CColors::gdpStripeColor2));
if (graphics.graphics)
{
SolidBrush brush (color);
graphics.graphics->FillRectangle (&brush, rect);
}
else if (graphics.pSVG)
graphics.pSVG->RoundedRectangle((int)rect.X, (int)rect.Y, (int)rect.Width, (int)rect.Height,
color, 1, color);
}
}
}
size_t CRevisionGraphState::GetTreeCount() const
{
CSingleLock lock (&mutex);
if (layout.get() == NULL)
return 0;
CSyncPointer<const ILayoutRectList> trees
( &mutex
, layout->GetTrees()
, true);
return trees->GetCount();
}