private static void TracePropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
BreadcrumbItem item = sender as BreadcrumbItem;
RoutedPropertyChangedEventArgs <object> args = new RoutedPropertyChangedEventArgs <object>(e.OldValue, e.NewValue, TraceChangedEvent);
item.RaiseEvent(args);
}
//TODO: Menu needs too long to render if there are too many items (> 20000).
void contextMenu_Opened(object sender, RoutedEventArgs e)
{
contextMenu.Items.Clear();
contextMenu.ItemTemplate = ItemTemplate;
contextMenu.ItemTemplateSelector = ItemTemplateSelector;
// List<MenuItem> menuItems = new List<MenuItem>();
foreach (object item in Items)
{
if (!(item is MenuItem) && !(item is Separator))
{
RibbonMenuItem menuItem = new RibbonMenuItem();
menuItem.DataContext = item;
BreadcrumbItem bi = item as BreadcrumbItem;
if (bi == null)
{
BreadcrumbItem parent = TemplatedParent as BreadcrumbItem;
if (parent != null)
{
bi = parent.ContainerFromItem(item);
}
}
if (bi != null)
{
menuItem.Header = bi.TraceValue;
}
Image image = new Image();
image.Source = bi != null ? bi.Image : null;
image.SnapsToDevicePixels = true;
image.Stretch = Stretch.Fill;
image.VerticalAlignment = VerticalAlignment.Center;
image.HorizontalAlignment = HorizontalAlignment.Center;
image.Width = 16;
image.Height = 16;
menuItem.Icon = image;
menuItem.Click += new RoutedEventHandler(item_Click);
if (item != null && item.Equals(SelectedItem))
{
menuItem.FontWeight = FontWeights.Bold;
}
menuItem.ItemTemplate = ItemTemplate;
menuItem.ItemTemplateSelector = ItemTemplateSelector;
contextMenu.Items.Add(menuItem);
}
else
{
contextMenu.Items.Add(item);
}
}
contextMenu.Placement = PlacementMode.Relative;
contextMenu.PlacementTarget = dropDownBtn;
contextMenu.VerticalOffset = dropDownBtn.ActualHeight;
}
/// <summary>
/// Creates a new BreadcrumbItem out of the specified data.
/// </summary>
/// <param name="dataContext">The DataContext for the BreadcrumbItem</param>
/// <returns>DataContext if dataContext is a Breadcrumbitem, otherwhise a new BreadcrumbItem.</returns>
public static BreadcrumbItem CreateItem(object dataContext)
{
BreadcrumbItem item = dataContext as BreadcrumbItem;
if (item == null && dataContext != null)
{
item = new BreadcrumbItem();
item.DataContext = dataContext;
}
return(item);
}
/// <summary>
/// Generates a new BreadcrumbItem out of the specified item.
/// </summary>
/// <param name="item">The item for which to create a new BreadcrumbItem.</param>
/// <returns>Item, if item is a BreadcrumbItem, otherwhise a newly created BreadcrumbItem.</returns>
public BreadcrumbItem ContainerFromItem(object item)
{
BreadcrumbItem result = item as BreadcrumbItem;
if (result == null)
{
result = CreateItem(item);
if (result != null)
{
AddLogicalChild(result);
result.ApplyTemplate();
}
}
return(result);
}
/// <summary>
/// Gets the item that represents the specified trace otherwise null.
/// </summary>
/// <param name="trace">The Trace property of the associated BreadcrumbItem.</param>
/// <returns>An object included in Items, otherwise null.</returns>
public object GetTraceItem(string trace)
{
this.ApplyTemplate();
foreach (object item in Items)
{
BreadcrumbItem bcItem = ContainerFromItem(item);
if (bcItem != null)
{
ApplyProperties(item);
string value = bcItem.TraceValue;
if (value != null && value.Equals(trace, StringComparison.InvariantCultureIgnoreCase))
{
return(item);
}
}
else
{
return(null);
}
}
return(null);
}
public ApplyPropertiesEventArgs(object item, BreadcrumbItem breadcrumb, RoutedEvent routedEvent)
: base(routedEvent)
{
Item = item;
Breadcrumb = breadcrumb;
}
/// <summary>
/// Appies the binding to the breadcrumb item.
/// </summary>
public void ApplyBinding()
{
object item = DataContext;
if (item == null)
{
return;
}
BreadcrumbItem root = this;
DataTemplate template = HeaderTemplate;
DataTemplateSelector templateSelector = HeaderTemplateSelector;
if (templateSelector != null)
{
template = templateSelector.SelectTemplate(item, root);
}
if (template == null)
{
DataTemplateKey key = GetResourceKey(item);
if (key != null)
{
template = TryFindResource(key) as DataTemplate;
}
}
root.SelectedItem = null;
HierarchicalDataTemplate hdt = template as HierarchicalDataTemplate;
if (template != null)
{
root.Header = template.LoadContent();
}
else
{
root.Header = item;
}
root.DataContext = item;
if (hdt != null)
{
// bind the Items to the hierarchical data template:
root.SetBinding(BreadcrumbItem.ItemsSourceProperty, hdt.ItemsSource);
}
BreadcrumbBar bar = BreadcrumbBar;
if (bar != null)
{
if (TraceBinding == null)
{
TraceBinding = bar.TraceBinding;
}
if (ImageBinding == null)
{
ImageBinding = bar.ImageBinding;
}
}
if (TraceBinding != null)
{
root.SetBinding(BreadcrumbItem.TraceProperty, TraceBinding);
}
if (ImageBinding != null)
{
root.SetBinding(BreadcrumbItem.ImageProperty, ImageBinding);
}
ApplyProperties(item);
}
/// <summary>
/// Occurs when the Overflow property is changed.
/// </summary>
/// <param name="d"></param>
/// <param name="e"></param>
public static void OverflowPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
BreadcrumbItem item = d as BreadcrumbItem;
item.OnOverflowChanged((bool)e.NewValue);
}
/// <summary>
/// Occurs when the IsDropDownPressed property is changed.
/// </summary>
/// <param name="d"></param>
/// <param name="e"></param>
public static void DropDownPressedPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
BreadcrumbItem item = d as BreadcrumbItem;
item.OnDropDownPressedChanged();
}
protected override DependencyObject GetContainerForItemOverride()
{
BreadcrumbItem item = new BreadcrumbItem();
return(item);
}
private static void SelectedBreadcrumbPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
BreadcrumbItem item = d as BreadcrumbItem;
item.OnSelectedBreadcrumbChanged(e.OldValue, e.NewValue);
}
private static void HeaderPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
BreadcrumbItem item = sender as BreadcrumbItem;
}
public BreadcrumbItemEventArgs(BreadcrumbItem item, RoutedEvent routedEvent)
: base(routedEvent)
{
Item = item;
}