public static bool GoToElementState(FrameworkElement element, object targetObject, string stateName, bool useTransitions)
{
var root = FindNearestStatefulFrameworkElement(element);
var customVisualStateManager = VisualStateManager.GetCustomVisualStateManager(root) as ExtendedVisualStateManager;
return((customVisualStateManager != null) && customVisualStateManager.GoToStateInternal(root, targetObject, stateName, useTransitions));
}
private static FrameworkElement FindNearestStatefulFrameworkElement(FrameworkElement element)
{
while (element != null && VisualStateManager.GetCustomVisualStateManager(element) == null)
{
element = element.Parent as FrameworkElement;
}
return(element);
}
public static bool GoToElementState(FrameworkElement root, string stateName, bool useTransitions)
{
var _visualStateManager = VisualStateManager.GetCustomVisualStateManager(root) as ExtendedVisualStateManager;
if (_visualStateManager != null)
{
return(_visualStateManager.GoToStateInternal(root, stateName, useTransitions));
}
else
{
return(false);
}
}
private static void OnVisualStateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (e.NewValue == null)
{
return;
}
if (d is FrameworkElement element)
{
var manager = (BindableVisualStateManager)VisualStateManager.GetCustomVisualStateManager(element);
if (manager != null)
{
manager.GoToState(element, e.NewValue.ToString(), true);
}
}
}
/// <summary>
/// Transfers the styles and transitions from two framework elements.
/// </summary>
/// <param name="oldElement">The old element.</param>
/// <param name="newElement">The new element.</param>
public static void TransferStylesAndTransitions(this FrameworkElement oldElement, FrameworkElement newElement)
{
Argument.IsNotNull("oldElement", oldElement);
Argument.IsNotNull("newElement", newElement);
Log.Debug("Transferring styles and transitions");
var name = oldElement.Name;
var renderTransform = oldElement.RenderTransform;
var renderTransformOrigin = oldElement.RenderTransformOrigin;
oldElement.RenderTransform = null;
oldElement.Name = "__dynamicReplacement".GetUniqueControlName();
newElement.Name = name;
newElement.RenderTransform = renderTransform;
newElement.RenderTransformOrigin = renderTransformOrigin;
var customVisualStateManager = VisualStateManager.GetCustomVisualStateManager(oldElement);
if (customVisualStateManager != null)
{
VisualStateManager.SetCustomVisualStateManager(oldElement, null);
VisualStateManager.SetCustomVisualStateManager(newElement, customVisualStateManager);
}
var oldContentVisualStateGroups = VisualStateManager.GetVisualStateGroups(oldElement);
if (oldContentVisualStateGroups.Count > 0)
{
// Copy to temp list, then clear, then add them to new parent
var tempList = new List <VisualStateGroup>(oldContentVisualStateGroups.Cast <VisualStateGroup>());
oldContentVisualStateGroups.Clear();
var newContentVisualStateGroups = VisualStateManager.GetVisualStateGroups(newElement);
foreach (var visualStateGroup in tempList)
{
newContentVisualStateGroups.Add(visualStateGroup);
}
}
Log.Debug("Transferred styles and transitions");
}
public static bool GoToElementState(FrameworkElement root, string stateName, bool useTransitions)
{
ExtendedVisualStateManager customVisualStateManager = VisualStateManager.GetCustomVisualStateManager(root) as ExtendedVisualStateManager;
return((customVisualStateManager != null) && customVisualStateManager.GoToStateInternal(root, stateName, useTransitions));
}
public void GetCustomVSMNullDO()
{
Assert.Throws(() => VisualStateManager.GetCustomVisualStateManager(null), typeof(ArgumentNullException));
}
