/// <summary>
/// Determines whether the entry is visible or not.
/// </summary>
/// <param name="renderedEntry">The rendered entry.</param>
/// <param name="view">The view to check for (BrailleIoViewRange).</param>
/// <returns>
/// -1 if not visible; 0 if party visible, and 1 if fully visible.
/// </returns>
public virtual int IsEntryVisible(RenderElement renderedEntry, IViewBoxModel view = null)
{
if (!renderedEntry.IsEmpty())
{
if (view == null)
{
view = _lastView;
}
if (view != null && view.ContentBox.Width * view.ContentBox.Height > 0)
{
int left, top, right, bottom;
left = top = 0;
if (view is IPannable)
{
left = ((IPannable)view).GetXOffset();
top = ((IPannable)view).GetYOffset();
}
right = view.ContentBox.Width + left;
bottom = view.ContentBox.Height + top;
if (renderedEntry.IsInArea(left, left + right, top, top + bottom))
{
if (renderedEntry.IsCompletelyInArea(left, right, top, bottom))
{
return(1);
}
return(0);
}
}
}
return(-1);
}