/// <summary>
/// Gets the edit path from the tracess of the BreacrumbItems.
/// </summary>
/// <returns></returns>
public string GetEditPath()
{
string displayPath = GetDisplayPath();
PathConversionEventArgs e = new PathConversionEventArgs(ConversionMode.DisplayToEdit, displayPath, Root, PathConversionEvent);
RaiseEvent(e);
return(e.EditPath);
}
/// <summary>
/// Gets the path of the specified BreadcrumbItem.
/// </summary>
/// <param name="item">The BreadrumbItem for which to determine the path.</param>
/// <returns>The path of the BreadcrumbItem which is the concenation of all Traces from all selected breadcrumbs.</returns>
public string PathFromBreadcrumbItem(BreadcrumbItem item)
{
StringBuilder sb = new StringBuilder();
while (item != null)
{
if (item == RootItem && sb.Length > 0)
{
break;
}
if (sb.Length > 0)
{
sb.Insert(0, SeparatorString);
}
sb.Insert(0, item.TraceValue);
item = item.ParentBreadcrumbItem;
}
PathConversionEventArgs e = new PathConversionEventArgs(ConversionMode.DisplayToEdit, sb.ToString(), Root, PathConversionEvent);
RaiseEvent(e);
return(e.EditPath);
}
/// <summary>
/// Traces the specified path and builds the associated BreadcrumbItems.
/// </summary>
/// <param name="path">The traces separated by the SepearatorString property.</param>
private bool BuildBreadcrumbsFromPath(string newPath)
{
PathConversionEventArgs e = new PathConversionEventArgs(ConversionMode.EditToDisplay, newPath, Root, PathConversionEvent);
RaiseEvent(e);
newPath = e.DisplayPath;
BreadcrumbItem item = RootItem;
if (item == null)
{
this.Path = null;
return(false);
}
newPath = RemoveLastEmptySeparator(newPath);
string[] traces = newPath.Split(new string[] { SeparatorString }, StringSplitOptions.RemoveEmptyEntries);
if (traces.Length == 0)
{
RootItem.SelectedItem = null;
}
int index = 0;
List <int> itemIndex = new List <int>();
// if the root is specified as first trace, then skip:
int length = traces.Length;
int max = BreadcrumbsToHide;
if (traces.Length > index && max > 0 && traces[index] == (RootItem.TraceValue))
{
length--;
index++;
max--;
}
for (int i = index; i < traces.Length; i++)
{
if (item == null)
{
break;
}
string trace = traces[i];
OnPopulateItems(item);
object next = item.GetTraceItem(trace);
if (next == null)
{
break;
}
itemIndex.Add(item.Items.OfType <object>().ToList().IndexOf(next));
BreadcrumbItem container = item.ContainerFromItem(next);
item = container;
}
if (length != itemIndex.Count)
{
//recover the last path:
Path = GetDisplayPath();
return(false);
}
// temporarily remove the SelectionChangedEvent handler to minimize processing of events while building the breadcrumb items:
RemoveHandler(BreadcrumbItem.SelectionChangedEvent, breadcrumbItemSelectedItemChanged);
try
{
item = RootItem;
for (int i = 0; i < itemIndex.Count; i++)
{
if (item == null)
{
break;
}
item.SelectedIndex = itemIndex[i];
item = item.SelectedBreadcrumb;
}
if (item != null)
{
item.SelectedItem = null;
}
SelectedBreadcrumb = item;
SelectedItem = item != null ? item.Data : null;
}
finally
{
AddHandler(BreadcrumbItem.SelectionChangedEvent, breadcrumbItemSelectedItemChanged);
}
return(true);
}
