private void BeginMenuAnimations(IViewMenuItem collapsedVMI, IViewMenuItem expandedVMI)
{
if (collapsedVMI != null)
{
var listBoxItem = this.MenuListBox.ItemContainerGenerator.ContainerFromItem(collapsedVMI) as ListBoxItem;
var subMenuBorder = (listBoxItem.Template as ControlTemplate).FindName("SubMenuBorder", listBoxItem) as Border;
Storyboard.SetTargetProperty(this.SubMenuCollapseAnimation, new PropertyPath(Border.HeightProperty));
Storyboard.SetTarget(this.SubMenuCollapseAnimation, subMenuBorder);
this.SubMenuCollapseAnimation.KeyFrames[0].Value = subMenuBorder.ActualHeight;
this.SubMenuExpandCollapseSB.Children.Add(this.SubMenuCollapseAnimation);
}
else
{
this.SubMenuExpandCollapseSB.Children.Remove(this.SubMenuCollapseAnimation);
}
if (expandedVMI != null)
{
var listBoxItem = this.MenuListBox.ItemContainerGenerator.ContainerFromItem(expandedVMI) as ListBoxItem;
var subMenuBorder = (listBoxItem.Template as ControlTemplate).FindName("SubMenuBorder", listBoxItem) as Border;
Storyboard.SetTargetProperty(this.SubMenuExpandAnimation, new PropertyPath(Border.HeightProperty));
Storyboard.SetTarget(this.SubMenuExpandAnimation, subMenuBorder);
this.SubMenuExpandAnimation.KeyFrames[1].Value = expandedVMI.Children.Count * 30 + 4;
this.SubMenuExpandCollapseSB.Children.Add(this.SubMenuExpandAnimation);
}
else
{
this.SubMenuExpandCollapseSB.Children.Remove(this.SubMenuExpandAnimation);
}
this.SubMenuExpandCollapseSB.Begin();
}
private void ListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
IViewMenuItem collapsedVMI = null;
IViewMenuItem expandedVMI = null;
if (e.RemovedItems != null && e.RemovedItems.Count > 0 && e.RemovedItems[0] is IViewMenuItem)
{
collapsedVMI = e.RemovedItems[0] as IViewMenuItem;
}
if (e.AddedItems != null && e.AddedItems.Count > 0 && e.AddedItems[0] is IViewMenuItem)
{
expandedVMI = e.AddedItems[0] as IViewMenuItem;
}
this.BeginMenuAnimations(collapsedVMI, expandedVMI);
}
public override void Initialize()
{
this.ViewMenuItem = this.GetViewMenuItem();
this.guiRoutingService.Register(this);
}
