/// ------------------------------------------------------------------------------------
/// <summary>
/// This routine is used to estimate the height of an item. The item will be one of
/// those you have added to the environment using AddLazyItems. Note that the calling
/// code does NOT ensure that data for displaying the item in question has been loaded.
/// The first three arguments are as for Display, that is, you are being asked to
/// estimate how much vertical space is needed to display this item in the available width.
/// </summary>
/// <param name="hvo">Item whose height is to be estimated</param>
/// <param name="frag">Basically indicates what kind of thing the HVO represents (or
/// else we're in trouble)</param>
/// <param name="availableWidth"></param>
/// <returns>Height of an item in points</returns>
/// ------------------------------------------------------------------------------------
public int EstimateHeight(int hvo, int frag, int availableWidth)
{
CheckDisposed();
// Find maximum height of all rootsite slaves in view
int maxHeight = 0;
int paraHeight;
if (m_slaves.Count > 0)
{
Debug.Assert(m_paraCounter != null,
"Need to set ParagraphCounterManager.ParagraphCounterType before creating RootSiteGroup");
int slaveWidth;
foreach (IRootSite slave in m_slaves)
{
slaveWidth = slave.GetAvailWidth(null);
Debug.Assert(slaveWidth != 0 || !((Control)slave).Visible);
slaveWidth = (slaveWidth == 0) ? 1 : slaveWidth;
paraHeight = (RootSite.kdxBaselineRootsiteWidth *
((IHeightEstimator)slave).AverageParaHeight) / slaveWidth;
maxHeight = Math.Max(m_paraCounter.GetParagraphCount(hvo, frag) * paraHeight,
maxHeight);
}
}
else
{
Debug.Fail("Need to handle this!");
}
return(maxHeight);
}
/// ------------------------------------------------------------------------------------
/// <summary>
/// Calculate height for books and sections.
/// </summary>
/// <param name="hvo"></param>
/// <param name="frag"></param>
/// <param name="dxAvailWidth"></param>
/// <returns>The estimated height for the specified hvo in points</returns>
/// ------------------------------------------------------------------------------------
public int EstimateHeight(int hvo, int frag, int dxAvailWidth)
{
int ret = m_paraCounter.GetParagraphCount(hvo, frag) * AverageParaHeight;
return(ret);
}