/// <summary>
/// A BreadcrumbItem needs to populate it's Items. This can be due to the fact that a new BreadcrumbItem is selected, and thus
/// it's Items must be populated to determine whether this BreadcrumbItem show a dropdown button,
/// or when the Path property of the BreadcrumbBar is changed and therefore the Breadcrumbs must be populated from the new path.
/// </summary>
private void BreadcrumbBar_PopulateItems(object sender, Odyssey.Controls.BreadcrumbItemEventArgs e)
{
BreadcrumbItem item = e.Item;
if (item.Items.Count == 0)
{
PopulateFolders(item);
e.Handled = true;
}
}
/// <summary>
/// The dropdown menu of a BreadcrumbItem was pressed, so delete the current folders, and repopulate the folders
/// to ensure actual data.
/// </summary>
private void bar_BreadcrumbItemDropDownOpened(object sender, BreadcrumbItemEventArgs e)
{
BreadcrumbItem item = e.Item;
// only repopulate, if the BreadcrumbItem is dynamically generated which means, item.Data is a pointer to itself:
if (!(item.Data is BreadcrumbItem))
{
item.Items.Clear();
PopulateFolders(item);
}
}
/// <summary>
/// A BreadcrumbItem needs to populate it's Items. This can be due to the fact that a new BreadcrumbItem is selected, and thus
/// it's Items must be populated to determine whether this BreadcrumbItem show a dropdown button,
/// or when the Path property of the BreadcrumbBar is changed and therefore the Breadcrumbs must be populated from the new path.
/// </summary>
private void BreadcrumbBar_PopulateItems(object sender, Odyssey.Controls.BreadcrumbItemEventArgs e)
{
BreadcrumbItem item = e.Item;
BrowsingFile fse = item.Data as BrowsingFile;
if (item.Data == root)
{
if (item.Items.Count == 0)
{
foreach (var i in Model.Root)
{
item.Items.Add(i);
}
}
return;
}
if (item.Items.Contains(fake) || item.Items.Count == 0)
{
if (fse == root)
{
if (fse.IsPopulated)
{
item.Items.Clear();
foreach (var i in root.Folders)
{
item.Items.Add(i);
}
}
else
{
//Add a fake one so we get the selection image
item.Items.Add(fake);
}
}
else
{
if (fse.IsPopulated)
{
item.Items.Clear();
foreach (var i in fse.Folders)
{
item.Items.Add(i);
}
}
else
{
//Add a fake one so we get the selection image
item.Items.Add(fake);
}
}
}
}
/// <summary>
/// Occurs when the dropdown of a BreadcrumbItem is closed.
/// </summary>
protected virtual void OnBreadcrumbItemDropDownClosed(RoutedEventArgs e)
{
BreadcrumbItemEventArgs args = new BreadcrumbItemEventArgs(e.Source as BreadcrumbItem, BreadcrumbItemDropDownClosedEvent);
RaiseEvent(args);
}
/// <summary>
/// Occurs before acessing the Items property of a BreadcrumbItem. This event can be used to populate the Items on demand.
/// </summary>
protected virtual void OnPopulateItems(BreadcrumbItem item)
{
BreadcrumbItemEventArgs args = new BreadcrumbItemEventArgs(item, BreadcrumbBar.PopulateItemsEvent);
RaiseEvent(args);
}
