private async Task HandleTouchCompleted()
{
if (itemIndex >= ItemsSource.Count)
{
return;
}
var topCard = CardStack.Children[numberOfCards - 1];
var backCard = CardStack.Children[numberOfCards - 2];
// Check if card has been dragged far enough to trigger action
if (Math.Abs(cardDistance) >= CardMoveDistance)
{
// Move card off the screen
await topCard.TranslateTo(cardDistance > 0?this.Width : -this.Width, 0, animationLength / 2, Easing.SpringOut);
topCard.IsVisible = false;
// Fire events
if (cardDistance > 0)
{
Swiped?.Invoke(this, new SwipedEventArgs(ItemsSource[itemIndex], SwipeDirection.Right));
if (SwipedRightCommand != null && SwipedRightCommand.CanExecute(ItemsSource[itemIndex]))
{
SwipedRightCommand.Execute(ItemsSource[itemIndex]);
}
}
else
{
Swiped?.Invoke(this, new SwipedEventArgs(ItemsSource[itemIndex], SwipeDirection.Left));
if (SwipedLeftCommand != null && SwipedLeftCommand.CanExecute(ItemsSource[itemIndex]))
{
SwipedLeftCommand.Execute(ItemsSource[itemIndex]);
}
}
// Next card
itemIndex++;
ShowNextCard();
}
else
{
// Move card back to the center
var traslateAnmimation = topCard.TranslateTo((-topCard.X), -topCard.Y, animationLength, Easing.SpringOut);
var rotateAnimation = topCard.RotateTo(0, animationLength, Easing.SpringOut);
// Scale the back card down
var scaleAnimation = backCard.ScaleTo(defaultSubcardScale, animationLength, Easing.SpringOut);
// Run all animations from above simultaneiously
await Task.WhenAll(new List <Task> {
traslateAnmimation, rotateAnimation, scaleAnimation
});
}
if (itemIndex < ItemsSource.Count)
{
FinishedDragging?.Invoke(this, new DraggingEventArgs(ItemsSource[itemIndex]));
}
}
private async Task HandleTouchCompleted()
{
if (_itemIndex >= ItemsSource.Count || !_isDragging)
{
return;
}
_lastX = 0;
_isDragging = false;
var topCard = CardStack.Children[NumberOfCards - 1];
var backCard = CardStack.Children[NumberOfCards - 2];
if (Math.Abs(_cardDistance) >= CardMoveDistance)
{
await topCard.TranslateTo(_cardDistance > 0?Width * 2 : -Width * 2, 0, DefaultAnimationLength, Easing.SinIn);
topCard.IsVisible = false;
if (_cardDistance > 0)
{
Swiped?.Invoke(this, new SwipedEventArgs(ItemsSource[_itemIndex], SwipeDirection.Right));
if (SwipedRightCommand != null && SwipedRightCommand.CanExecute(ItemsSource[_itemIndex]))
{
SwipedRightCommand.Execute(ItemsSource[_itemIndex]);
}
}
else
{
Swiped?.Invoke(this, new SwipedEventArgs(ItemsSource[_itemIndex], SwipeDirection.Left));
if (SwipedLeftCommand != null && SwipedLeftCommand.CanExecute(ItemsSource[_itemIndex]))
{
SwipedLeftCommand.Execute(ItemsSource[_itemIndex]);
}
}
_itemIndex++;
ShowNextCard();
}
else
{
await Task.WhenAll(
topCard.TranslateTo((-topCard.X), -topCard.Y, DefaultAnimationLength, Easing.SpringOut),
topCard.RotateTo(0, DefaultAnimationLength, Easing.SpringOut),
backCard.ScaleTo(_defaultSubcardScale, DefaultAnimationLength, Easing.SpringOut),
backCard.TranslateTo(_defaultSubcardTranslationX, 0, DefaultAnimationLength, Easing.SpringOut),
backCard.FadeTo(_defaultSubcardOpacity, DefaultAnimationLength, Easing.SpringOut)
);
}
_cardDistance = 0;
if (_itemIndex < ItemsSource.Count)
{
FinishedDragging?.Invoke(this, new DraggingEventArgs(ItemsSource[_itemIndex], _cardDistance));
}
}
async Task HandleTouchCompleted()
{
if (itemIndex >= ItemsSource.Count)
{
await Application.Current.MainPage.DisplayAlert("SwipeCard Demo", "Sorry there is no card left to swipe.", "OK");
return;
}
var topCard = CardStack.Children[numberOfCards - 1];
var backCard = CardStack.Children[numberOfCards - 2];
// Check if card has been dragged far enough to trigger action
if (Math.Abs(cardDistance) >= CardMoveDistance)
{
// Move card off the screen
await topCard.TranslateTo(cardDistance > 0?this.Width * 2 : -this.Width * 2, 0, defaultAnimationLength, Easing.SinIn);
topCard.IsVisible = false;
// Fire events
if (cardDistance > 0)
{
Swiped?.Invoke(this, new SwipedEventArgs(ItemsSource[itemIndex], SwipeDirection.Right));
if (SwipedRightCommand != null && SwipedRightCommand.CanExecute(ItemsSource[itemIndex]))
{
SwipedRightCommand.Execute(ItemsSource[itemIndex]);
}
}
else
{
Swiped?.Invoke(this, new SwipedEventArgs(ItemsSource[itemIndex], SwipeDirection.Left));
if (SwipedLeftCommand != null && SwipedLeftCommand.CanExecute(ItemsSource[itemIndex]))
{
SwipedLeftCommand.Execute(ItemsSource[itemIndex]);
}
}
// Next card
itemIndex++;
ShowNextCard();
}
else
{
// Run animations simultaniously
await Task.WhenAll(
// Move card back to the center
topCard.TranslateTo((-topCard.X), -topCard.Y, defaultAnimationLength, Easing.SpringOut),
topCard.RotateTo(0, defaultAnimationLength, Easing.SpringOut),
// Scale the back card down
backCard.ScaleTo(defaultSubcardScale, defaultAnimationLength, Easing.SpringOut)
);
}
if (itemIndex < ItemsSource.Count)
{
FinishedDragging?.Invoke(this, new DraggingEventArgs(ItemsSource[itemIndex]));
}
}
