public void Update(IList <T> items, float deltaTime)
{
FindChanges(items, out _, out List <ScrollListItem> toRemove);
//Fade out and destroy old ones
foreach (ScrollListItem item in toRemove)
{
item._lerp = 1.0f;
item._state = ScrollListItem.State.FadingOut;
item._item.OnHide();
_itemsBeingRemoved.Add(item);
}
UpdateOrdering();
UpdateContentSize();
//Lerp items to their target positions, lerp fade in
foreach (ScrollListItem item in _items)
{
if (item._lerp < 1.0f)
{
item._lerp = Mathf.Clamp01(item._lerp + _lerpSpeed * deltaTime);
if (item._state == ScrollListItem.State.Moving)
{
float curvedLerp = MovementCurve.Evaluate(item._lerp);
item._item.GetTransform().anchoredPosition = Vector2.Lerp(item._fromPosition, item._targetPosition, curvedLerp);
}
else if (item._state == ScrollListItem.State.FadingIn)
{
item._item.SetFade(item._lerp);
}
if (item._lerp >= 1.0f)
{
item._state = ScrollListItem.State.Normal;
}
}
}
//Lerp fade out for items being removed, destroy any that are no zero
for (int i = 0; i < _itemsBeingRemoved.Count;)
{
_itemsBeingRemoved[i]._lerp += _lerpSpeed * deltaTime;
if (_itemsBeingRemoved[i]._lerp > 1.0f)
{
_itemPool.Destroy(_itemsBeingRemoved[i]._item.GetTransform().gameObject);
_itemsBeingRemoved.RemoveAt(i);
}
else
{
_itemsBeingRemoved[i]._item.SetFade(1.0f - _itemsBeingRemoved[i]._lerp);
i++;
}
}
}
public void Destroy()
{
_parentPool.Destroy(this.gameObject);
}
private void UpdateLines(float deltaTime)
{
//keep lines in sync
TMP_TextInfo textInfo = _textMesh.textInfo;
float lineHeight = _lineHeight * _textMesh.fontSize;
//Need to add new lines
if (_lines.Length < textInfo.lineCount)
{
Image[] lines = new Image[textInfo.lineCount];
for (int i = 0; i < lines.Length; i++)
{
if (i < _lines.Length)
{
lines[i] = _lines[i];
}
else
{
lines[i] = _linePrefabPool.Instantiate(_textMesh.rectTransform).GetComponent <Image>();
lines[i].rectTransform.pivot = new Vector2(0f, 0.5f);
lines[i].rectTransform.anchorMin = new Vector2(0f, 0f);
lines[i].rectTransform.anchorMax = new Vector2(0f, 0f);
lines[i].rectTransform.sizeDelta = new Vector2(0f, lineHeight);
}
}
_lines = lines;
if (!_animated)
{
_lineIndex = textInfo.lineCount;
}
}
//Need to remove lines
else if (_lines.Length > textInfo.lineCount)
{
Image[] lines = new Image[textInfo.lineCount];
for (int i = 0; i < _lines.Length; i++)
{
if (i < textInfo.lineCount)
{
lines[i] = _lines[i];
}
else
{
_linePrefabPool.Destroy(_lines[i].gameObject);
}
}
_lines = lines;
if (_lineIndex > textInfo.lineCount)
{
_lineIndex = textInfo.lineCount;
_currentLineSpeed = _speed;
}
}
//Update animations
if (_animated && _lineIndex < _lines.Length && deltaTime > 0f)
{
RectTransform currentLine = _lines[_lineIndex].rectTransform;
currentLine.anchoredPosition = GetLinePosition(textInfo.lineInfo[_lineIndex], out float lineWidth);
float currentWidth = RectTransformUtils.GetWidth(currentLine);
if (currentWidth < lineWidth)
{
_currentLineSpeed += _acceleration * deltaTime;
currentWidth += _currentLineSpeed * deltaTime;
if (currentWidth >= lineWidth)
{
currentWidth = lineWidth;
_currentLinePauseTimer = _endOfLinePause;
}
}
else
{
currentWidth = lineWidth;
_currentLinePauseTimer -= deltaTime;
if (_currentLinePauseTimer <= 0f)
{
_currentLineSpeed = _speed;
_lineIndex++;
}
}
currentLine.sizeDelta = new Vector2(currentWidth, lineHeight);
}
//Update shown lines
for (int i = 0; i < Mathf.Min(_lines.Length, _lineIndex); i++)
{
_lines[i].rectTransform.anchoredPosition = GetLinePosition(textInfo.lineInfo[i], out float lineWidth);
_lines[i].rectTransform.sizeDelta = new Vector2(lineWidth, lineHeight);
_lines[i].color = _lineColor;
}
}