/// <summary>
/// Updating with an animation (after a tap)
/// </summary>
private void UpdatePositionsWithAnimationAsync(PickerSelectorItem selectedItem, Double delta, TimeSpan duration)
{
animationSnap.From = selectedItem.GetTranslateTransform().Y;
animationSnap.To = selectedItem.GetTranslateTransform().Y + delta;
animationSnap.Duration = duration;
animationSnap.EasingFunction = new ExponentialEase {
EasingMode = EasingMode.EaseInOut
};
sliderVertical.ValueChanged -= OnVerticalOffsetChanged;
sliderVertical.Value = selectedItem.GetTranslateTransform().Y;
sliderVertical.ValueChanged += OnVerticalOffsetChanged;
this.storyboard.Completed += (sender, o) =>
{
if (SelectedItemChanged != null)
{
SelectedItemChanged(this, selectedItem);
}
};
this.storyboard.RunAsync();
}
/// <summary>
/// Translate items to a new offset
/// </summary>
private void UpdatePosition(Int32 startIndex, Int32 endIndex, Double offset)
{
for (Int32 i = startIndex; i < endIndex; i++)
{
PickerSelectorItem loopListItem = this.Children[i] as PickerSelectorItem;
if (loopListItem == null)
{
continue;
}
TranslateTransform translateTransform = loopListItem.GetTranslateTransform();
translateTransform.Y = offset;
}
}
/// <summary>
/// Updating with an animation (after a tap)
/// </summary>
private void UpdatePositionsWithAnimationAsync(PickerSelectorItem selectedItem, Double delta, TimeSpan duration)
{
if (Orientation == Orientation.Vertical)
{
animationSnap.From = selectedItem.GetTranslateTransform().Y;
animationSnap.To = selectedItem.GetTranslateTransform().Y + delta;
}
else
{
animationSnap.From = selectedItem.GetTranslateTransform().X;
animationSnap.To = selectedItem.GetTranslateTransform().X + delta;
}
animationSnap.Duration = duration;
animationSnap.EasingFunction = new ExponentialEase { EasingMode = EasingMode.EaseInOut };
internalSlider.ValueChanged -= OnOffsetChanged;
internalSlider.Value = Orientation == Orientation.Vertical
? selectedItem.GetTranslateTransform().Y
: selectedItem.GetTranslateTransform().X;
internalSlider.ValueChanged += OnOffsetChanged;
this.storyboard.Completed += (sender, o) =>
{
if (SelectedItemChanged != null)
{
SelectedItemChanged(this, selectedItem);
}
};
this.storyboard.RunAsync();
}