public bool GoToState(VisualState state, bool useTransitions)
{
if (state == CurrentState)
{
return(true);
}
string currentStateName = CurrentState != null ? CurrentState.Name : String.Empty;
VisualTransition transition = useTransitions ? GetTransition(Transitions, currentStateName, state.Name) : null;
Storyboard transitionStoryboard = transition != null ? transition.Storyboard : null;
Storyboard storyboard;
if (transitionStoryboard != null && state.Storyboard != null)
{
// create a sequential animation with the transition storyboard first and then the state storyboard
SequentialTimeline sequentialTimeline = new SequentialTimeline();
sequentialTimeline.Children.Add(transitionStoryboard);
sequentialTimeline.Children.Add(state.Storyboard);
storyboard = new Storyboard();
storyboard.Children.Add(sequentialTimeline);
}
else
{
storyboard = transitionStoryboard ?? state.Storyboard;
}
StartNewStoryboard(storyboard);
CurrentState = state;
return(true);
}
// Token: 0x06000D02 RID: 3330 RVA: 0x00030728 File Offset: 0x0002E928
internal static VisualTransition GetTransition(FrameworkElement element, VisualStateGroup group, VisualState from, VisualState to)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
if (group == null)
{
throw new ArgumentNullException("group");
}
if (to == null)
{
throw new ArgumentNullException("to");
}
VisualTransition visualTransition = null;
VisualTransition visualTransition2 = null;
int num = -1;
IList <VisualTransition> list = (IList <VisualTransition>)group.Transitions;
if (list != null)
{
foreach (VisualTransition visualTransition3 in list)
{
if (visualTransition2 == null && visualTransition3.IsDefault)
{
visualTransition2 = visualTransition3;
}
else
{
int num2 = -1;
VisualState state = group.GetState(visualTransition3.From);
VisualState state2 = group.GetState(visualTransition3.To);
if (from == state)
{
num2++;
}
else if (state != null)
{
continue;
}
if (to == state2)
{
num2 += 2;
}
else if (state2 != null)
{
continue;
}
if (num2 > num)
{
num = num2;
visualTransition = visualTransition3;
}
}
}
}
return(visualTransition ?? visualTransition2);
}
/// <summary>
/// Get the most appropriate transition between two states.
/// </summary>
/// <param name="element">Element being transitioned.</param>
/// <param name="group">Group being transitioned.</param>
/// <param name="from">VisualState being transitioned from.</param>
/// <param name="to">VisualState being transitioned to.</param>
/// <returns>
/// The most appropriate transition between the desired states.
/// </returns>
internal static VisualTransition GetTransition(FrameworkElement element, VisualStateGroup group, VisualState from, VisualState to)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
if (group == null)
{
throw new ArgumentNullException("group");
}
if (to == null)
{
throw new ArgumentNullException("to");
}
VisualTransition best = null;
VisualTransition defaultTransition = null;
int bestScore = -1;
IList <VisualTransition> transitions = (IList <VisualTransition>)group.Transitions;
if (transitions != null)
{
foreach (VisualTransition transition in transitions)
{
if (defaultTransition == null && transition.IsDefault)
{
defaultTransition = transition;
continue;
}
int score = -1;
VisualState transitionFromState = group.GetState(transition.From);
VisualState transitionToState = group.GetState(transition.To);
if (from == transitionFromState)
{
score += 1;
}
else if (transitionFromState != null)
{
continue;
}
if (to == transitionToState)
{
score += 2;
}
else if (transitionToState != null)
{
continue;
}
if (score > bestScore)
{
bestScore = score;
best = transition;
}
}
}
return(best ?? defaultTransition);
}
private static Storyboard GenerateDynamicTransitionAnimations(FrameworkElement root, VisualStateGroup group, VisualState newState, VisualTransition transition)
{
IEasingFunction easingFunction = null;
Storyboard dynamic = new Storyboard();
if (transition != null)
{
if (transition.GeneratedDuration != null)
{
dynamic.Duration = transition.GeneratedDuration;
}
easingFunction = transition.GeneratedEasingFunction;
}
else
{
dynamic.Duration = new Duration(TimeSpan.Zero);
}
Dictionary <TimelineDataToken, Timeline> currentAnimations = FlattenTimelines(group.CurrentStoryboards);
Dictionary <TimelineDataToken, Timeline> transitionAnimations = FlattenTimelines(transition != null ? transition.Storyboard : null);
Dictionary <TimelineDataToken, Timeline> newStateAnimations = FlattenTimelines(newState.Storyboard);
// Remove any animations that the transition already animates.
// There is no need to create an interstitial animation if one already exists.
foreach (KeyValuePair <TimelineDataToken, Timeline> pair in transitionAnimations)
{
currentAnimations.Remove(pair.Key);
newStateAnimations.Remove(pair.Key);
}
// Generate the "to" animations
foreach (KeyValuePair <TimelineDataToken, Timeline> pair in newStateAnimations)
{
// The new "To" Animation -- the root is passed as a reference point for name
// lookup.
Timeline toAnimation = GenerateToAnimation(root, pair.Value, easingFunction, true);
// If the animation is of a type that we can't generate transition animations
// for, GenerateToAnimation will return null, and we should just keep going.
if (toAnimation != null)
{
toAnimation.Duration = dynamic.Duration;
dynamic.Children.Add(toAnimation);
}
// Remove this from the list of current state animations we have to consider next
currentAnimations.Remove(pair.Key);
}
// Generate the "from" animations
foreach (KeyValuePair <TimelineDataToken, Timeline> pair in currentAnimations)
{
Timeline fromAnimation = GenerateFromAnimation(root, pair.Value, easingFunction);
if (fromAnimation != null)
{
fromAnimation.Duration = dynamic.Duration;
dynamic.Children.Add(fromAnimation);
}
}
return(dynamic);
}
private static bool GoToStateInternal(FrameworkElement control, FrameworkElement stateGroupsRoot, VisualStateGroup group, VisualState state, bool useTransitions)
{
if (stateGroupsRoot == null)
{
throw new ArgumentNullException("stateGroupsRoot");
}
if (state == null)
{
throw new ArgumentNullException("state");
}
if (group == null)
{
throw new InvalidOperationException();
}
VisualState lastState = group.CurrentState;
if (lastState == state)
{
return(true);
}
// Get the transition Storyboard. Even if there are no transitions specified, there might
// be properties that we're rolling back to their default values.
VisualTransition transition = useTransitions ? VisualStateManager.GetTransition(stateGroupsRoot, group, lastState, state) : null;
// Generate dynamicTransition Storyboard
Storyboard dynamicTransition = GenerateDynamicTransitionAnimations(stateGroupsRoot, group, state, transition);
// If the transition is null, then we want to instantly snap. The dynamicTransition will
// consist of everything that is being moved back to the default state.
// If the transition.Duration and explicit storyboard duration is zero, then we want both the dynamic
// and state Storyboards to happen in the same tick, so we start them at the same time.
if (transition == null || (transition.GeneratedDuration == DurationZero &&
(transition.Storyboard == null || transition.Storyboard.Duration == DurationZero)))
{
// Start new state Storyboard and stop any previously running Storyboards
if (transition != null && transition.Storyboard != null)
{
group.StartNewThenStopOld(stateGroupsRoot, transition.Storyboard, state.Storyboard);
}
else
{
group.StartNewThenStopOld(stateGroupsRoot, state.Storyboard);
}
// Fire both CurrentStateChanging and CurrentStateChanged events
group.RaiseCurrentStateChanging(stateGroupsRoot, lastState, state, control);
group.RaiseCurrentStateChanged(stateGroupsRoot, lastState, state, control);
}
else
{
// In this case, we have an interstitial storyboard of duration > 0 and/or
// explicit storyboard of duration >0 , so we need
// to run them first, and then we'll run the state storyboard.
// we have to wait for both storyboards to complete before
// starting the steady state animations.
transition.DynamicStoryboardCompleted = false;
// Hook up generated Storyboard's Completed event handler
dynamicTransition.Completed += delegate(object sender, EventArgs e)
{
if (transition.Storyboard == null || transition.ExplicitStoryboardCompleted)
{
if (ShouldRunStateStoryboard(control, stateGroupsRoot, state, group))
{
group.StartNewThenStopOld(stateGroupsRoot, state.Storyboard);
}
group.RaiseCurrentStateChanged(stateGroupsRoot, lastState, state, control);
}
transition.DynamicStoryboardCompleted = true;
};
if (transition.Storyboard != null && transition.ExplicitStoryboardCompleted == true)
{
EventHandler transitionCompleted = null;
transitionCompleted = new EventHandler(delegate(object sender, EventArgs e)
{
if (transition.DynamicStoryboardCompleted)
{
if (ShouldRunStateStoryboard(control, stateGroupsRoot, state, group))
{
group.StartNewThenStopOld(stateGroupsRoot, state.Storyboard);
}
group.RaiseCurrentStateChanged(stateGroupsRoot, lastState, state, control);
}
transition.Storyboard.Completed -= transitionCompleted;
transition.ExplicitStoryboardCompleted = true;
});
// hook up explicit storyboard's Completed event handler
transition.ExplicitStoryboardCompleted = false;
transition.Storyboard.Completed += transitionCompleted;
}
// Start transition and dynamicTransition Storyboards
// Stop any previously running Storyboards
group.StartNewThenStopOld(stateGroupsRoot, transition.Storyboard, dynamicTransition);
group.RaiseCurrentStateChanging(stateGroupsRoot, lastState, state, control);
}
group.CurrentState = state;
return(true);
}
private static Storyboard GenerateDynamicTransitionAnimations(FrameworkElement root, VisualStateGroup group, VisualState newState, VisualTransition transition)
{
Storyboard dynamic = new Storyboard();
if (transition != null && transition.GeneratedDuration != null)
{
dynamic.Duration = transition.GeneratedDuration;
}
else
{
dynamic.Duration = new Duration(TimeSpan.Zero);
}
Dictionary <TimelineDataToken, Timeline> currentAnimations = FlattenTimelines(group.CurrentStoryboards);
Dictionary <TimelineDataToken, Timeline> transitionAnimations = FlattenTimelines(transition != null ? transition.Storyboard : null);
Dictionary <TimelineDataToken, Timeline> newStateAnimations = FlattenTimelines(newState.Storyboard);
// Remove any animations that the transition already animates.
// There is no need to create an interstitial animation if one already exists.
foreach (KeyValuePair <TimelineDataToken, Timeline> pair in transitionAnimations)
{
currentAnimations.Remove(pair.Key);
newStateAnimations.Remove(pair.Key);
}
// Generate the "to" animations
foreach (KeyValuePair <TimelineDataToken, Timeline> pair in newStateAnimations)
{
// The new "To" Animation -- the root is passed as a reference point for name
// lookup.
Timeline toAnimation = GenerateToAnimation(root, pair.Value, true);
// If the animation is of a type that we can't generate transition animations
// for, GenerateToAnimation will return null, and we should just keep going.
if (toAnimation != null)
{
toAnimation.Duration = dynamic.Duration;
dynamic.Children.Add(toAnimation);
}
// Remove this from the list of current state animations we have to consider next
currentAnimations.Remove(pair.Key);
}
// Generate the "from" animations
foreach (KeyValuePair <TimelineDataToken, Timeline> pair in currentAnimations)
{
Timeline fromAnimation = GenerateFromAnimation(pair.Value);
if (fromAnimation != null)
{
fromAnimation.Duration = dynamic.Duration;
string targetName = Storyboard.GetTargetName(pair.Value);
Storyboard.SetTargetName(fromAnimation, targetName);
// If the targetName of the existing Animation is known, then look up the
// target
DependencyObject target = String.IsNullOrEmpty(targetName) ?
null : root.FindName(targetName) as DependencyObject;
if (target != null)
{
Storyboard.SetTarget(fromAnimation, target);
}
PropertyPath propertyName = Storyboard.GetTargetProperty(pair.Value);
Storyboard.SetTargetProperty(fromAnimation, propertyName);
dynamic.Children.Add(fromAnimation);
}
}
return(dynamic);
}
// Token: 0x06000CFE RID: 3326 RVA: 0x0003040C File Offset: 0x0002E60C
private static Storyboard GenerateDynamicTransitionAnimations(FrameworkElement root, VisualStateGroup group, VisualState newState, VisualTransition transition)
{
IEasingFunction easingFunction = null;
Storyboard storyboard = new Storyboard();
if (transition != null)
{
Duration generatedDuration = transition.GeneratedDuration;
storyboard.Duration = transition.GeneratedDuration;
easingFunction = transition.GeneratedEasingFunction;
}
else
{
storyboard.Duration = new Duration(TimeSpan.Zero);
}
Dictionary <VisualStateManager.TimelineDataToken, Timeline> dictionary = VisualStateManager.FlattenTimelines(group.CurrentStoryboards);
Dictionary <VisualStateManager.TimelineDataToken, Timeline> dictionary2 = VisualStateManager.FlattenTimelines((transition != null) ? transition.Storyboard : null);
Dictionary <VisualStateManager.TimelineDataToken, Timeline> dictionary3 = VisualStateManager.FlattenTimelines(newState.Storyboard);
foreach (KeyValuePair <VisualStateManager.TimelineDataToken, Timeline> keyValuePair in dictionary2)
{
dictionary.Remove(keyValuePair.Key);
dictionary3.Remove(keyValuePair.Key);
}
foreach (KeyValuePair <VisualStateManager.TimelineDataToken, Timeline> keyValuePair2 in dictionary3)
{
Timeline timeline = VisualStateManager.GenerateToAnimation(root, keyValuePair2.Value, easingFunction, true);
if (timeline != null)
{
timeline.Duration = storyboard.Duration;
storyboard.Children.Add(timeline);
}
dictionary.Remove(keyValuePair2.Key);
}
foreach (KeyValuePair <VisualStateManager.TimelineDataToken, Timeline> keyValuePair3 in dictionary)
{
Timeline timeline2 = VisualStateManager.GenerateFromAnimation(root, keyValuePair3.Value, easingFunction);
if (timeline2 != null)
{
timeline2.Duration = storyboard.Duration;
storyboard.Children.Add(timeline2);
}
}
return(storyboard);
}
// Token: 0x06000CFA RID: 3322 RVA: 0x000300A4 File Offset: 0x0002E2A4
private static bool GoToStateInternal(FrameworkElement control, FrameworkElement stateGroupsRoot, VisualStateGroup group, VisualState state, bool useTransitions)
{
if (stateGroupsRoot == null)
{
throw new ArgumentNullException("stateGroupsRoot");
}
if (state == null)
{
throw new ArgumentNullException("state");
}
if (group == null)
{
throw new InvalidOperationException();
}
VisualState lastState = group.CurrentState;
if (lastState == state)
{
return(true);
}
VisualTransition transition = useTransitions ? VisualStateManager.GetTransition(stateGroupsRoot, group, lastState, state) : null;
Storyboard storyboard = VisualStateManager.GenerateDynamicTransitionAnimations(stateGroupsRoot, group, state, transition);
if (transition == null || (transition.GeneratedDuration == VisualStateManager.DurationZero && (transition.Storyboard == null || transition.Storyboard.Duration == VisualStateManager.DurationZero)))
{
if (transition != null && transition.Storyboard != null)
{
group.StartNewThenStopOld(stateGroupsRoot, new Storyboard[]
{
transition.Storyboard,
state.Storyboard
});
}
else
{
group.StartNewThenStopOld(stateGroupsRoot, new Storyboard[]
{
state.Storyboard
});
}
group.RaiseCurrentStateChanging(stateGroupsRoot, lastState, state, control);
group.RaiseCurrentStateChanged(stateGroupsRoot, lastState, state, control);
}
else
{
transition.DynamicStoryboardCompleted = false;
storyboard.Completed += delegate(object sender, EventArgs e)
{
if (transition.Storyboard == null || transition.ExplicitStoryboardCompleted)
{
if (VisualStateManager.ShouldRunStateStoryboard(control, stateGroupsRoot, state, group))
{
group.StartNewThenStopOld(stateGroupsRoot, new Storyboard[]
{
state.Storyboard
});
}
group.RaiseCurrentStateChanged(stateGroupsRoot, lastState, state, control);
}
transition.DynamicStoryboardCompleted = true;
};
if (transition.Storyboard != null && transition.ExplicitStoryboardCompleted)
{
EventHandler transitionCompleted = null;
transitionCompleted = delegate(object sender, EventArgs e)
{
if (transition.DynamicStoryboardCompleted)
{
if (VisualStateManager.ShouldRunStateStoryboard(control, stateGroupsRoot, state, group))
{
group.StartNewThenStopOld(stateGroupsRoot, new Storyboard[]
{
state.Storyboard
});
}
group.RaiseCurrentStateChanged(stateGroupsRoot, lastState, state, control);
}
transition.Storyboard.Completed -= transitionCompleted;
transition.ExplicitStoryboardCompleted = true;
};
transition.ExplicitStoryboardCompleted = false;
transition.Storyboard.Completed += transitionCompleted;
}
group.StartNewThenStopOld(stateGroupsRoot, new Storyboard[]
{
transition.Storyboard,
storyboard
});
group.RaiseCurrentStateChanging(stateGroupsRoot, lastState, state, control);
}
group.CurrentState = state;
return(true);
}
