/// <summary>
/// Execute handler for the browse back command.
/// Retrieves the previous navigation item from the history list and navigates to it.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void BrowseBackCommand_Executed(object sender, ExecutedRoutedEventArgs e)
{
_ignoreViewSelectionChange = true;
NavigationItem targetItem = _historsList.BrowseBack();
_context.ContextVisibility = Visibility.Collapsed;
targetItem.Context.ContextVisibility = Visibility.Visible;
_context.OnHierarchyDeactivated();
_context = targetItem.Context;
_context.OnHierarchyActivated(targetItem.Id);
NotifyPropertyChanged(new PropertyChangedEventArgs(""));
_ignoreViewSelectionChange = false;
}
/// <summary>
/// Execute handler for the browse down command.
/// Navigates to the lower hiearchy.
/// E.g. from floor view to zone view.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void BrowseDownCommand_Executed(object sender, ExecutedRoutedEventArgs e)
{
_ignoreViewSelectionChange = true;
_context.ContextVisibility = Visibility.Collapsed;
_context.Child.ContextVisibility = Visibility.Visible;
_context.OnHierarchyDeactivated();
_context = _context.Child;
_context.OnHierarchyActivated(e.Parameter as Address);
//if ((e.Parameter != null) && (e.Parameter is Address))
// _context.Navigate(e.Parameter as Address);
//else
// _context.Navigate(null);
_historsList.Append(new NavigationItem(_context, new Address(_context.ObjectId), _context.ObjectName));
NotifyPropertyChanged(new PropertyChangedEventArgs(""));
_ignoreViewSelectionChange = false;
}
/// <summary>
/// The navigation object.
/// </summary>
/// <param name="context"></param>
public Navigator(IHierarchyContext context)
{
this._context = context;
CommandBinding binding = new CommandBinding(CustomCommands.BrowseNext, NextViewCommand_Executed, NextViewCommand_CanExecute);
_bindings.Add(binding);
binding = new CommandBinding(CustomCommands.BrowsePrevious, PreviousViewCommand_Executed, PreviousViewCommand_CanExecute);
_bindings.Add(binding);
binding = new CommandBinding(NavigationCommands.BrowseForward, BrowseForwardCommand_Executed, BrowseForwardCommand_CanExecute);
_bindings.Add(binding);
binding = new CommandBinding(NavigationCommands.BrowseBack, BrowseBackCommand_Executed, BrowseBackCommand_CanExecute);
_bindings.Add(binding);
binding = new CommandBinding(CustomCommands.BrowseDown, BrowseDownCommand_Executed, BrowseDownCommand_CanExecute);
_bindings.Add(binding);
binding = new CommandBinding(CustomCommands.BrowseUp, BrowseUpCommand_Executed, BrowseUpCommand_CanExecute);
_bindings.Add(binding);
}
/// <summary>
/// Updates the context with the specified new zone context.
/// </summary>
/// <param name="context">The new zone context.</param>
public void UpdateContext(IHierarchyContext context)
{
if ((context is ZoneContext) == false)
{
return;
}
_ignoreViewSelectionChange = true;
ZoneContext newContext = context as ZoneContext;
_zones = newContext._zones;
_activeZone = _zones[0];
_sources = newContext._sources;
NotifyPropertyChanged(new PropertyChangedEventArgs(""));
_ignoreViewSelectionChange = false;
}
/// <summary>
/// Specifies a all attributes of a view at a point of time.
/// </summary>
/// <param name="context">The hierarchy. Right now this is either the main context, the floor context or the zone context</param>
/// <param name="id">The address of the item shown in the view.</param>
/// <param name="name">The name of the item shown in the view.</param>
public NavigationItem(IHierarchyContext context, Address id, string name)
{
this._context = context;
this._id = id;
this._name = name;
}
/// <summary>
/// Updates the context with the specified parameter.
/// </summary>
/// <param name="context"></param>
public void UpdateContext(IHierarchyContext context)
{
// not used
}
/// <summary>
/// Updates the context with the specified parameter.
/// </summary>
/// <param name="context"></param>
public void UpdateContext(IHierarchyContext context)
{
// nothing to do
}
