/// <summary>
/// Count how many references this item has. Virtual so a subclass can use a different
/// algorithm (c.f. SemanticDomainsChooser's DomainNode).
/// </summary>
/// <returns></returns>
protected virtual int CountUsages()
{
// Don't count the reference from an overlay, since we have no way to tell
// how many times that overlay has been used. See FWR-1050.
ObjectLabel label = Label;
int count = 0;
// I think only label.Object is likely to be null, but let's prevent crashes thoroughly.
if (label != null && label.Object != null && label.Object.ReferringObjects != null)
{
count = label.Object.ReferringObjects.Count;
foreach (ICmObject x in label.Object.ReferringObjects)
{
if (x is ICmOverlay)
{
--count;
}
}
}
return(count);
}
/// <summary>
/// Initializes a new instance of the <see cref="LabelNode"/> class.
/// </summary>
/// <param name="label">The label.</param>
/// <param name="stylesheet">The stylesheet.</param>
/// <param name="displayUsage"><c>true</c> if usage statistics will be displayed; otherwise, <c>false</c>.</param>
public LabelNode(ObjectLabel label, IVwStylesheet stylesheet, bool displayUsage)
{
Tag = label;
m_stylesheet = stylesheet;
m_displayUsage = displayUsage;
m_fEnabled = true;
m_enabledColor = ForeColor;
ITsString tssDisplay = label.AsTss;
int wsVern;
if (HasVernacularText(tssDisplay, label.Cache.ServiceLocator.WritingSystems.CurrentVernacularWritingSystems.Select(ws => ws.Handle),
out wsVern))
{
NodeFont = GetVernacularFont(label.Cache.WritingSystemFactory, wsVern, stylesheet);
}
SetNodeText();
if (label.HaveSubItems)
{
// this is a hack to make the node expandable before we have filled in any
// actual children
Nodes.Add(new TreeNode("should not see this"));
}
}
/// <summary>
/// Creates the specified LabelNode from the ObjectLabel.
/// </summary>
/// <param name="nol"></param>
/// <param name="stylesheet"></param>
/// <param name="displayUsage"><c>true</c> if usage statistics will be displayed; otherwise, <c>false</c>.</param>
/// <returns></returns>
protected virtual LabelNode Create(ObjectLabel nol, IVwStylesheet stylesheet, bool displayUsage)
{
return(new LabelNode(nol, stylesheet, displayUsage));
}
/// --------------------------------------------------------------------------------
/// <summary>
/// Wants the node for label.
/// </summary>
/// <param name="label">The label.</param>
/// <returns></returns>
/// --------------------------------------------------------------------------------
public virtual bool WantNodeForLabel(ObjectLabel label)
{
return(true); // by default want all nodes.
}