protected void UnLinkSubStyle(ISubStyle style, ISubStyle parentProvided)
{
if (style == null)
{
return;
}
style.OnChange -= TriggerChanged;
if (parentProvided == null)
{
return;
}
// We remove parent provided style.
while (style.Parent != null)
{
if (style.Parent == parentProvided)
{
style.Parent = null;
return;
}
style = style.Parent;
}
}
protected void LinkSubStyle(ISubStyle style, ISubStyle parentProvided)
{
if (style == null)
{
return;
}
style.OnChange += TriggerChanged;
if (parentProvided == null)
{
return;
}
// We link it to parent provided.
while (style.Parent != null)
{
style = style.Parent;
}
if (style != parentProvided)
{
style.Parent = parentProvided;
}
}
protected void ReparentSubStyle(ISubStyle style,
ISubStyle prevParentProvided, ISubStyle currentParentProvided)
{
UnLinkSubStyle(style, prevParentProvided);
LinkSubStyle(style, currentParentProvided);
}