//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;
}
void rItem_MouseEnter(object sender, MouseEventArgs e)
{
RibbonMenuItem item = sender as RibbonMenuItem;
if (item.HasItems)
{
selectedItem = item;
EnsureTimer().Start();
}
}
protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
{
base.PrepareContainerForItemOverride(element, item);
RibbonMenuItem rItem = item as RibbonMenuItem;
if (rItem != null)
{
rItem.MouseEnter += new MouseEventHandler(rItem_MouseEnter);
rItem.MouseLeave += new MouseEventHandler(rItem_MouseLeave);
}
}
void rItem_MouseLeave(object sender, MouseEventArgs e)
{
if (timer != null)
{
timer.Stop();
}
selectedItem = null;
RibbonMenuItem item = sender as RibbonMenuItem;
item.IsSubmenuOpen = false;
}
void timer_Elapsed(object sender, ElapsedEventArgs e)
{
timer.Stop();
RibbonMenuItem item = selectedItem;
if (item != null)
{
MyFunc d = delegate() { item.IsSubmenuOpen = true; };
this.Dispatcher.BeginInvoke(d);
}
}
