/// <summary>
/// Switches to the view specified.
/// </summary>
public async Task SwitchToAsync(View view, object data = null)
{
if (view == ActiveView)
{
return;
}
if (ActiveView != null)
{
if (SwitchMode == SwitchMode.Load)
{
ActiveView.Unload();
}
else
{
ActiveView.IsActive = false;
}
}
ActiveView = view as SceneObjectView;
if (ActiveView == null)
{
return;
}
// load/activate view
await ActiveView.LoadAsync();
ActiveView.IsActive = true;
ActiveView.Setup(data);
}
/// <summary>
/// Switches to the view specified.
/// </summary>
public void SwitchTo(View view)
{
if (view == ActiveView)
{
return;
}
if (ActiveView != null)
{
if (SwitchMode == SwitchMode.Load)
{
ActiveView.Unload();
}
else
{
ActiveView.IsActive = false;
}
}
ActiveView = view as SceneObjectView;
if (ActiveView == null)
{
return;
}
// load/activate view
ActiveView.Load();
ActiveView.IsActive = true;
}
/// <summary>
/// Called before the view is loaded.
/// </summary>
protected override void BeforeLoad()
{
if (IgnoreObject)
{
return;
}
base.BeforeLoad();
ViewStack = new Stack <View>();
var firstChild = Content.LayoutChildren.FirstOrDefault();
// make sure load-mode is set to Manual in children if we're loading them
foreach (SceneObjectView child in Content.LayoutChildren)
{
if (!String.IsNullOrEmpty(StartView) && child.Id.IEquals(StartView))
{
ActiveView = child;
continue;
}
if (ShowFirstByDefault && child == firstChild)
{
ActiveView = child;
continue;
}
var childLoadMode = child.LoadMode | ChildLoadMode;
if (SwitchMode == SwitchMode.Load || SwitchMode == SwitchMode.LoadOnce)
{
var loadMode = childLoadMode | LoadMode.Manual;
child.LoadMode = loadMode;
}
else
{
childLoadMode &= ~LoadMode.Manual; // remove any manual flag to force automatic if we're activating them
child.LoadMode = childLoadMode;
if (SwitchMode == SwitchMode.Enable)
{
child.IsActive = false;
}
}
}
}
/// <summary>
/// Called before the view is loaded.
/// </summary>
protected override void BeforeLoad()
{
if (IgnoreObject)
{
return;
}
base.BeforeLoad();
Messenger.Register <NavigatorMessage>(this, Id, OnNavigatorMessage, false, true);
ViewStack = new Stack <View>();
foreach (var kv in Path.AttachedValues)
{
var child = kv.Key as SceneObjectView;
var path = kv.Value;
if (!String.IsNullOrEmpty(path) && path == StartPath)
{
ActiveView = child;
continue;
}
var childLoadMode = child.LoadMode | ChildLoadMode;
if (SwitchMode == SwitchMode.Load || SwitchMode == SwitchMode.LoadOnce)
{
var loadMode = childLoadMode | LoadMode.Manual;
child.LoadMode = loadMode;
}
else
{
childLoadMode &= ~LoadMode.Manual; // remove any manual flag to force automatic if we're activating them
child.LoadMode = childLoadMode;
if (SwitchMode == SwitchMode.Enable)
{
child.IsActive = false;
}
}
}
}
/// <summary>
/// Opens the page specified.
/// </summary>
public async void SetPageState(View view, object data, NavigationTransition navigationTransition)
{
if (view == ActiveView)
{
return;
}
List <Task> transitionTasks = null;
SceneObjectView transitionOutView = null;
if (ActiveView != null)
{
transitionOutView = ActiveView;
transitionTasks = new List <Task>();
// add transition out task
switch (navigationTransition)
{
case NavigationTransition.Open:
transitionTasks.Add(ActiveView.SetState("Closed"));
break;
case NavigationTransition.Push:
transitionTasks.Add(ActiveView.SetState("Pushed"));
break;
case NavigationTransition.Pop:
transitionTasks.Add(ActiveView.SetState("Closed"));
break;
case NavigationTransition.Close:
transitionTasks.Add(ActiveView.SetState("Closed"));
break;
}
}
ActiveView = view as SceneObjectView;
if (ActiveView != null)
{
// load/activate view
await ActiveView.LoadAsync();
ActiveView.IsActive = true;
ActiveView.Setup(data);
if (transitionTasks == null)
{
transitionTasks = new List <Task>();
}
// add transition in task
switch (navigationTransition)
{
case NavigationTransition.Push:
case NavigationTransition.Open:
await ActiveView.SetState("Closed", false);
transitionTasks.Add(ActiveView.SetState(DefaultStateName));
break;
case NavigationTransition.Pop:
await ActiveView.SetState("Pushed", false);
transitionTasks.Add(ActiveView.SetState(DefaultStateName));
break;
default:
case NavigationTransition.Close:
break;
}
}
if (transitionTasks != null)
{
await Task.WhenAll(transitionTasks);
}
// unload/deactivate views that has transitioned out
if (transitionOutView != null && SwitchMode != SwitchMode.Manual)
{
if (SwitchMode == SwitchMode.Load)
{
transitionOutView.Unload();
}
else
{
transitionOutView.IsActive = false;
}
}
}
