/// <summary>
/// Adds a colored border around each layout element on the page.
/// </summary>
private static void AddBoundingBoxToElementsOnPage(LayoutEnumerator layoutEnumerator, Graphics g)
{
do
{
// Use MoveLastChild and MovePrevious to enumerate from last to the first enumeration is done backward,
// so the lines of child entities are drawn first and don't overlap the parent's lines.
if (layoutEnumerator.MoveLastChild())
{
AddBoundingBoxToElementsOnPage(layoutEnumerator, g);
layoutEnumerator.MoveParent();
}
// Convert the rectangle representing the position of the layout entity on the page from points to pixels.
RectangleF rectF = layoutEnumerator.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(layoutEnumerator.Type), rect);
// Stop after all elements on the page have been processed.
if (layoutEnumerator.Type == LayoutEntityType.Page)
{
return;
}
} while (layoutEnumerator.MovePrevious());
}
/// <summary>
/// Enumerate through layoutEnumerator's layout entity collection back-to-front, in a DFS manner, and in a "Visual" order.
/// </summary>
private static void TraverseLayoutBackward(LayoutEnumerator layoutEnumerator, int depth)
{
do
{
PrintCurrentEntity(layoutEnumerator, depth);
if (layoutEnumerator.MoveLastChild())
{
TraverseLayoutBackward(layoutEnumerator, depth + 1);
layoutEnumerator.MoveParent();
}
} while (layoutEnumerator.MovePrevious());
}
/// <summary>
/// Adds a colored border around each layout element on the page.
/// </summary>
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());
}
