private static void AddBoundingBoxToElementsOnPage(LayoutEnumerator it, Graphics g)
{
do
{
// This time instead of MoveFirstChild and MoveNext, we use MoveLastChild and MovePrevious to enumerate from last to first.
// Enumeration is done backward so the lines of child entities are drawn first and don't overlap the lines of the parent.
if (it.MoveLastChild())
{
AddBoundingBoxToElementsOnPage(it, g);
it.MoveParent();
}
// Convert the rectangle representing the position of the layout entity on the page from points to pixels.
RectangleF rectF = it.Rectangle;
Rectangle rect = new Rectangle(PointToPixel(rectF.Left, g.DpiX), PointToPixel(rectF.Top, g.DpiY),
PointToPixel(rectF.Width, g.DpiX), PointToPixel(rectF.Height, g.DpiY));
// Draw a line around the layout entity on the page.
g.DrawRectangle(GetColoredPenFromType(it.Type), rect);
// Stop after all elements on the page have been procesed.
if (it.Type == LayoutEntityType.Page)
return;
} while (it.MovePrevious());
}
