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Add persist mode to swipe #10

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Add persist mode to swipe #10

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5 changes: 5 additions & 0 deletions Runtime/Universal.UI.Xaml.Controls/SwipeListBehavior.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,11 @@ public enum SwipeListBehavior
/// </summary>
Collapse,

/// <summary>
/// Triggered when swipe reaches 2/5 of the width of the item. Once triggered side menu will continue to stay open, <see cref="SwipeListViewItem"/> state is not restored.
/// </summary>
Persist,

/// <summary>
/// Swipe is disabled.
/// </summary>
Expand Down
53 changes: 53 additions & 0 deletions Runtime/Universal.UI.Xaml.Controls/SwipeListViewItem.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -229,13 +229,17 @@ protected override void OnManipulationCompleted(ManipulationCompletedRoutedEvent
{
if (LeftBehavior == SwipeListBehavior.Collapse)
currentAnim = CollapseAnimation(SwipeListDirection.Left, true);
else if (LeftBehavior == SwipeListBehavior.Persist)
currentAnim = PersistAnimation(SwipeListDirection.Left, target);
else
currentAnim = ExpandAnimation(SwipeListDirection.Left);
}
else if (_direction == SwipeListDirection.Right && ContentDragTransform.X <= -target)
{
if (RightBehavior == SwipeListBehavior.Collapse)
currentAnim = CollapseAnimation(SwipeListDirection.Right, true);
else if (RightBehavior == SwipeListBehavior.Persist)
currentAnim = PersistAnimation(SwipeListDirection.Right, target);
else
currentAnim = ExpandAnimation(SwipeListDirection.Right);
}
Expand Down Expand Up @@ -329,6 +333,48 @@ private Storyboard ExpandAnimation(SwipeListDirection direction)
return currentAnim;
}



private Storyboard PersistAnimation(SwipeListDirection direction, double target)
{
var currentAnim = new Storyboard();
if (direction == SwipeListDirection.Left)
{
var animDrag = CreateDouble(target, 300, ContentDragTransform, "TranslateTransform.X", new ExponentialEase { EasingMode = EasingMode.EaseOut });
var animClip = CreateDouble(target, 300, DragClipTransform, "TranslateTransform.X", new ExponentialEase { EasingMode = EasingMode.EaseOut });
var animLeft = CreateDouble(-LeftContainer.ActualWidth + target, 300, LeftTransform, "TranslateTransform.X", new ExponentialEase { EasingMode = EasingMode.EaseOut });
var animRight = CreateDouble((RightContainer.ActualWidth + target), 300, RightTransform, "TranslateTransform.X", new ExponentialEase { EasingMode = EasingMode.EaseOut });

currentAnim.Children.Add(animDrag);
currentAnim.Children.Add(animClip);
currentAnim.Children.Add(animLeft);
currentAnim.Children.Add(animRight);
}
else if (direction == SwipeListDirection.Right)
{
var animDrag = CreateDouble(-target, 300, ContentDragTransform, "TranslateTransform.X", new ExponentialEase { EasingMode = EasingMode.EaseOut });
var animClip = CreateDouble(-target, 300, DragClipTransform, "TranslateTransform.X", new ExponentialEase { EasingMode = EasingMode.EaseOut });
var animLeft = CreateDouble(-LeftContainer.ActualWidth - target, 300, LeftTransform, "TranslateTransform.X", new ExponentialEase { EasingMode = EasingMode.EaseOut });
var animRight = CreateDouble((RightContainer.ActualWidth - target), 300, RightTransform, "TranslateTransform.X", new ExponentialEase { EasingMode = EasingMode.EaseOut });

currentAnim.Children.Add(animDrag);
currentAnim.Children.Add(animClip);
currentAnim.Children.Add(animLeft);
currentAnim.Children.Add(animRight);
}

currentAnim.Completed += (s, args) =>
{
if (ItemSwipe != null)
ItemSwipe(this, new ItemSwipeEventArgs(Content, direction));

if (_parent != null)
_parent.RaiseItemSwipe(new ItemSwipeEventArgs(Content, direction));
};

return currentAnim;
}

private DoubleAnimation CreateDouble(double to, int duration, DependencyObject target, string path, EasingFunctionBase easing)
{
var anim = new DoubleAnimation();
Expand All @@ -346,6 +392,13 @@ private DoubleAnimation CreateDouble(double to, int duration, DependencyObject t
return anim;
}


public void CollapseSwipeContent()
{
var animation = CollapseAnimation(SwipeListDirection.Left, false);
animation.Begin();
}

/// <summary>
/// Occurs when the item is swiped from left or right.
/// </summary>
Expand Down