/// <summary>
/// Sets up the main animation with the animators for each item (each layoutPositionData structure)
/// </summary>
private void AddAnimatorsToAnimation(LayoutData layoutPositionData)
{
LayoutTransition positionTransition = new LayoutTransition();
LayoutTransition sizeTransition = new LayoutTransition();
TransitionCondition conditionForAnimators = layoutPositionData.ConditionForAnimation;
// LayoutChanged transitions overrides ChangeOnAdd and ChangeOnRemove as siblings will
// reposition to the new layout not to the insertion/removal of a sibling.
if (layoutPositionData.ConditionForAnimation.HasFlag(TransitionCondition.LayoutChanged))
{
conditionForAnimators = TransitionCondition.LayoutChanged;
}
// Set up a default transitions, will be overwritten if inherited from parent or set explicitly.
TransitionComponents positionTransitionComponents = CreateDefaultTransitionComponent(0, 300);
TransitionComponents sizeTransitionComponents = CreateDefaultTransitionComponent(0, 300);
bool matchedCustomTransitions = false;
TransitionList transitionsForCurrentCondition = new TransitionList();
// Note, Transitions set on View rather than LayoutItem so if the Layout changes the transition persist.
// Check if item to animate has it's own Transitions for this condition.
// If a key exists then a List of at least 1 transition exists.
if (layoutPositionData.Item.Owner.LayoutTransitions.ContainsKey(conditionForAnimators))
{
// Child has transitions for the condition
matchedCustomTransitions = layoutPositionData.Item.Owner.LayoutTransitions.TryGetValue(conditionForAnimators, out transitionsForCurrentCondition);
}
if (!matchedCustomTransitions)
{
// Inherit parent transitions as none already set on View for the condition.
ILayoutParent layoutParent = layoutPositionData.Item.GetParent();
if (layoutParent != null)
{
// Item doesn't have it's own transitions for this condition so copy parents if
// has a parent with transitions.
LayoutGroup layoutGroup = layoutParent as LayoutGroup;
TransitionList parentTransitionList;
// Note TryGetValue returns null if key not matched.
if (layoutGroup != null && layoutGroup.Owner.LayoutTransitions.TryGetValue(conditionForAnimators, out parentTransitionList))
{
// Copy parent transitions to temporary TransitionList. List contains transitions for the current condition.
LayoutTransitionsHelper.CopyTransitions(parentTransitionList,
transitionsForCurrentCondition);
}
}
}
// Position/Size transitions can be displayed for a layout changing to another layout or an item being added or removed.
// There can only be one position transition and one size position, they will be replaced if set multiple times.
// transitionsForCurrentCondition represent all non position (custom) properties that should be animated.
// Search for Position property in the transitionsForCurrentCondition list of custom transitions,
// and only use the particular parts of the animator as custom transitions should not effect all parameters of Position.
// Typically Delay, Duration and Alphafunction can be custom.
FindAndReplaceAnimatorComponentsForProperty(transitionsForCurrentCondition,
AnimatableProperties.Position,
ref positionTransitionComponents);
// Size
FindAndReplaceAnimatorComponentsForProperty(transitionsForCurrentCondition,
AnimatableProperties.Size,
ref sizeTransitionComponents);
// Add animators to the core Animation,
SetupAnimationForCustomTransitions(transitionsForCurrentCondition, layoutPositionData.Item.Owner);
SetupAnimationForPosition(layoutPositionData, positionTransitionComponents);
SetupAnimationForSize(layoutPositionData, sizeTransitionComponents);
// Dispose components
positionTransitionComponents.Dispose();
sizeTransitionComponents.Dispose();
}
/// <summary>
/// Sets up the main animation with the animators for each item (each layoutPositionData structure)
/// </summary>
private void AddAnimatorsToAnimation(LayoutData layoutPositionData)
{
LayoutTransition positionTransition = new LayoutTransition();
TransitionCondition conditionForAnimators = layoutPositionData.ConditionForAnimation;
// LayoutChanged transitions overrides ChangeOnAdd and ChangeOnRemove as siblings will
// reposition to the new layout not to the insertion/removal of a sibling.
if (layoutPositionData.ConditionForAnimation.HasFlag(TransitionCondition.LayoutChanged))
{
conditionForAnimators = TransitionCondition.LayoutChanged;
}
// Set up a default transition, will be overwritten if inherited from parent or set explicitly.
const int START_TIME = 0;
const int END_TIME = 100;
AlphaFunction alphaFunction = new AlphaFunction(AlphaFunction.BuiltinFunctions.Linear);
// positionTransitionComponents will be overwritten if set explicitly
TransitionComponents positionTransitionComponents = new TransitionComponents(START_TIME, END_TIME, alphaFunction);
bool matchedCustomTransitions = false;
// Inherit parent transitions if none already set on View for the condition.
// Transitions set on View rather than LayoutItem so if the Layout changes the transition persist.
// Still need to inherit Position animator from parent but not other animatable properties if already set.
TransitionList transitionsForCurrentCondition;
ILayoutParent layoutParent = layoutPositionData.Item.GetParent();
if (layoutParent != null)
{
// Check if item to aninmate has it's own Transitions for this condition.
if (layoutPositionData.Item.Owner.LayoutTransitions.ContainsKey(conditionForAnimators))
{
matchedCustomTransitions = true; // If a key exists then a List of atleast 1 transition exists.
}
else
{
// Item doesn't have it's own transitions for this condition so copy parents if
// has a parent with transitions.
transitionsForCurrentCondition = new TransitionList();
LayoutGroup layoutGroup = layoutParent as LayoutGroup;
TransitionList parentTransitionList;
// Note TryGetValue returns null if key not matched.
if (layoutGroup.Owner.LayoutTransitions.TryGetValue(conditionForAnimators, out parentTransitionList))
{
// Copy parent transitions for this condition to temporary TransitionList.
LayoutTransitionsHelper.CopyTransitions(parentTransitionList,
transitionsForCurrentCondition);
SetupAnimationForCustomTransitions(transitionsForCurrentCondition, layoutPositionData.Item.Owner);
matchedCustomTransitions = false;
}
}
}
// SetupAnimationXXXX functions add Animators to the core Animation, these can be custom or set by the
// layout system in the case of Positioning.
if (matchedCustomTransitions)
{
// Position transition can be for a layout changing to another layout or an item being added or removed.
// There can only be one position transition, it will be replaced if set multiple times.
// transitionsForCurrentCondition represent all non position (custom) properties that should be animated.
// There can be multiple properties hence returned as a list.
if (layoutPositionData.Item.Owner.LayoutTransitions.TryGetValue(conditionForAnimators, out transitionsForCurrentCondition))
{
// Search for Position property in the transitionsForCurrentCondition list of custom transitions,
// and only use the particular parts of the animator as custom transitions should not effect all parameters of Position.
// Typically Delay, Duration and Alphafunction can be custom.
FindAndReplaceAnimatorComponentsForProperty(transitionsForCurrentCondition,
AnimatableProperties.Position,
ref positionTransitionComponents);
SetupAnimationForCustomTransitions(transitionsForCurrentCondition, layoutPositionData.Item.Owner);
}
}
SetupAnimationForPosition(layoutPositionData, positionTransitionComponents);
SetupAnimationForText(layoutPositionData);
}