/// <summary>
/// Converts object to bindable collection.
/// </summary>
public static BindableCollection ToBindableCollection(this object obj, LayoutRoot layoutRoot)
{
if (obj == null)
{
return(null);
}
Type objType = obj.GetType();
// converts object to an bindable collection
if (BindableCollectionType.IsAssignableFrom(objType))
{
return(obj as BindableCollection);
}
else if (ObservedCollection.CanBeObserved(obj))
{
var observedCollection = new ObservedCollection(obj, layoutRoot);
return(observedCollection);
}
return(null);
}
/// <summary>
/// Called before the view is loaded.
/// </summary>
protected override void BeforeLoad()
{
// if adjusting size to parent EnableScriptEvents needs to be true before scene object is loaded
AdjustToParentChanged();
// load scene object
base.BeforeLoad();
// initialize root canvas
if (LayoutRoot == null)
{
var parentUIView = this.FindParent <UIView>(x => !x.IgnoreObject);
if (parentUIView == null)
{
// we are the root view
if (typeof(LayoutRoot).IsAssignableFrom(GetType()))
{
// we are the layout root
LayoutRoot = this as LayoutRoot;
}
else
{
// create new layout root
var layoutRoot = new LayoutRoot();
layoutRoot.Load();
LayoutRoot = layoutRoot;
LayoutParent = LayoutRoot;
if (!IgnoreObject)
{
GameObject.transform.SetParent(layoutRoot.GameObject.transform, false);
}
}
}
else
{
// use the same layout root as parent UIView
LayoutRoot = parentUIView.LayoutRoot;
}
}
if (IgnoreObject)
{
return;
}
// add rect transform
var rectTransform = GameObject.GetComponent <RectTransform>();
if (rectTransform == null)
{
rectTransform = GameObject.AddComponent <RectTransform>();
}
RectTransform = rectTransform;
// if hidden while loading set canvas alpha to zero
if (LoadMode.HasFlag(LoadMode.HiddenWhileLoading))
{
// to change alpha we need a canvas group attached
if (CanvasGroup == null)
{
var canvasGroup = GameObject.GetComponent <CanvasGroup>();
CanvasGroup = canvasGroup == null?GameObject.AddComponent <CanvasGroup>() : canvasGroup;
}
CanvasGroup.alpha = 0;
}
}
/// <summary>
/// Starts the animation.
/// </summary>
public Task Animate(LayoutRoot layoutRoot, float initialDelay)
{
return(Task.WhenAll(this.Select(x => x.Animate(layoutRoot, initialDelay))));
}
/// <summary>
/// Sets the state of the view.
/// </summary>
public virtual void SetState(string newState)
{
if (newState.IEquals(_previousState))
{
return;
}
// handle state animations
List <DependencyProperty> animatedProperties = null;
if (_stateAnimations != null)
{
// complete any previous state animators if active
foreach (var stateAnimator in _stateAnimations)
{
stateAnimator.StopAnimation();
stateAnimator.IsCompleted = true;
}
// start any state animators applicable to current state transition
foreach (var stateAnimator in _stateAnimations)
{
if ((stateAnimator.FromAny || stateAnimator.FromState == _previousState) &&
(stateAnimator.ToAny || stateAnimator.ToState == newState))
{
foreach (var animator in stateAnimator)
{
animator.StartAnimation();
LayoutRoot.RegisterAnimator(animator);
if (animatedProperties == null)
{
animatedProperties = new List <DependencyProperty>();
}
animatedProperties.Add(animator.Property);
}
}
}
}
// load/unload state changing properties that aren't animated
var stateChangingProperties = GetStateChangingProperties(newState);
if (stateChangingProperties != null)
{
// unload all state changing dependency properties
for (int i = 0; i < stateChangingProperties.Count; ++i)
{
var stateChangingProperty = stateChangingProperties[i];
if (animatedProperties != null && animatedProperties.Contains(stateChangingProperty))
{
continue;
}
stateChangingProperties[i].Unload(this);
}
// set state
_state = newState;
_previousState = newState;
// load all state changing dependency properties
for (int i = 0; i < stateChangingProperties.Count; ++i)
{
var stateChangingProperty = stateChangingProperties[i];
if (animatedProperties != null && animatedProperties.Contains(stateChangingProperty))
{
continue;
}
stateChangingProperties[i].Load(this);
}
}
else
{
// set state
_state = newState;
_previousState = newState;
}
}
/// <summary>
/// Updates the binding and propagates it.
/// </summary>
public void UpdateBinding(bool propagateValues = true, bool propagateTargetToSource = false, LayoutRoot layoutRoot = null)
{
if (layoutRoot != null)
{
LayoutRoot = layoutRoot;
}
if (IsSimple)
{
PropagateSourceToTarget();
return;
}
// detach any existing property changed listeners
foreach (var source in Sources)
{
foreach (var sourceObject in source.Objects)
{
RemoveChangeListener(source, sourceObject);
}
}
if (IsTwoWay)
{
foreach (var targetObject in Target.Objects)
{
RemoveChangeListener(Target, targetObject);
}
}
// get source and target objects and attach property changed listeners
SourcesReachable = true;
foreach (var source in Sources)
{
source.Objects.Clear();
source.IsReachable = true;
foreach (var sourceObjectGetter in source.ObjectGetters)
{
var sourceObject = sourceObjectGetter();
if (sourceObject == null)
{
source.IsReachable = false;
SourcesReachable = false;
break;
}
source.Objects.Add(sourceObject);
AddChangeListener(source, sourceObject);
}
}
Target.Objects.Clear();
Target.IsReachable = true;
foreach (var targetObjectGetter in Target.ObjectGetters)
{
var targetObject = targetObjectGetter();
if (targetObject == null)
{
Target.IsReachable = false;
break;
}
Target.Objects.Add(targetObject);
if (IsTwoWay)
{
AddChangeListener(Target, targetObject);
}
}
// propagate value if sources and target can be reached
if (!Target.IsReachable || !SourcesReachable)
{
return;
}
//LogPropagation(propagateTargetToSource);
if (propagateValues)
{
if (!propagateTargetToSource)
{
PropagateSourceToTarget();
}
else
{
if (IsTwoWay)
{
PropagateTargetToSource();
}
}
}
}