private ICollapsible ExpandInternal(ICollapsed collapsed)
{
EnsureValid();
Collapsed internalCollapsed = collapsed as Collapsed;
if (internalCollapsed == null)
{
throw new ArgumentException("The given collapsed region was not created by this outlining manager.",
"collapsed");
}
if (!internalCollapsed.IsValid)
{
throw new InvalidOperationException("The collapsed region is invalid, meaning it has already been expanded.");
}
if (!collapsedRegionTree.RemoveItem(internalCollapsed, internalCollapsed.Extent))
{
throw new ApplicationException("Unable to remove the collapsed region from outlining manager, which means there is an internal " +
"consistency issue.");
}
// Now that we've expanded the region, invalidate the ICollapsed so it can no longer be used.
internalCollapsed.Invalidate();
return(new Collapsible(collapsed.Extent, collapsed.Tag));
}
public ICollapsible Expand(ICollapsed collapsed)
{
ICollapsible newCollapsible = ExpandInternal(collapsed);
// Send out change event
var handler = RegionsExpanded;
if (handler != null)
{
handler(this, new RegionsExpandedEventArgs(Enumerable.Repeat(newCollapsible, 1)));
}
return(newCollapsible);
}
public ICollapsed TryCollapse(ICollapsible collapsible)
{
ICollapsed newCollapsed = CollapseInternal(collapsible);
if (newCollapsed == null)
{
return(newCollapsed);
}
// Raise event.
var handler = RegionsCollapsed;
if (handler != null)
{
handler(this, new RegionsCollapsedEventArgs(Enumerable.Repeat(newCollapsed, 1)));
}
return(newCollapsed);
}
internal bool Match(ICollapsed givenCollapsed)
{
return(base.Match(givenCollapsed));
}