private void RemovePreview(bool animated)
{
if (m_CurrentPreviews == null || m_RemovedPreviews != null)
{
return;
}
if (m_AddAnimations != null)
{
foreach (ValueAnimation <Rect> addAnimation in m_AddAnimations)
{
addAnimation.Stop();
}
m_AddAnimations = null;
}
m_RemovedPreviews = m_CurrentPreviews;
if (animated)
{
m_RemoveAnimations = new List <ValueAnimation <Rect> >(m_CurrentPreviews.Count);
foreach (VisualElement preview in m_RemovedPreviews)
{
Rect startRect = new Rect(Vector2.zero, preview.layout.size);
Rect endRect = startRect;
endRect.height = 0f;
var removeAnimations = new ValueAnimation <Rect>(this)
{
from = startRect,
to = endRect,
duration = animationDuration
};
removeAnimations.valueUpdated += value => UpdatePreviewLayout(preview, value);
removeAnimations.finished += OnRemoveAnimationFinished;
removeAnimations.Start();
m_RemoveAnimations.Add(removeAnimations);
}
}
else
{
RemovePreviewHelper();
}
}
private void AddPreview(IList <VisualElement> previews, int index, bool animated)
{
// Update the current preview with the newly added preview
m_CurrentPreviews = previews;
foreach (VisualElement preview in m_CurrentPreviews)
{
Insert(index++, preview);
}
if (animated)
{
m_AddAnimations = new List <ValueAnimation <Rect> >(m_CurrentPreviews.Count);
foreach (VisualElement preview in m_CurrentPreviews)
{
Vector2 size = new Vector2(preview.style.width.value.value, preview.style.height.value.value);
Rect startRect = new Rect(Vector2.zero, size);
Rect endRect = startRect;
startRect.height = 0f;
var addAnimation = new ValueAnimation <Rect>(this)
{
from = startRect,
to = endRect,
duration = animationDuration
};
addAnimation.valueUpdated += value => UpdatePreviewLayout(preview, value);
addAnimation.Start();
m_AddAnimations.Add(addAnimation);
}
}
else
{
foreach (VisualElement currentPreview in m_CurrentPreviews)
{
currentPreview.style.position = Position.Relative;
}
}
}