private ItemRow RequestRow(int itemIndex)
{
ItemRow row = null;
if (m_poolRows.Count > 0)
{
object item = m_itemContainer.GetItem(itemIndex);
for (int i = 0; i < m_poolRows.Count; i++)
{
if (item == m_poolRows[i].item)
{
row = m_poolRows[i];
m_poolRows.RemoveAt(i);
break;
}
}
if (row == null)
{
row = PopEndRow(m_poolRows);
}
}
else
{
row = m_funcCreateRow();
}
if (row != null)
{
SetRow(row, itemIndex);
}
return(row);
}
public static ItemRow Create(Transform itemParent, GameObject itemPrefab)
{
ItemRow row = new ItemRow();
GameObject go = GameObject.Instantiate(itemPrefab) as GameObject;
row.rect = go.GetComponent(typeof(RectTransform)) as RectTransform;
row.drawer = go.GetComponent(typeof(ItemDrawer)) as ItemDrawer;
go.transform.SetParent(itemParent, false);
return(row);
}
public override void SetLayoutVertical()
{
int visibleRowCount = m_rowContainer.VisibleRowCount;
float rowHeight = GetRowHeight();
float size = GetItemHeight();
for (int i = 0; i < visibleRowCount; i++)
{
ItemRow row = m_rowContainer.GetVisibleRow(i);
float pos = rowHeight * row.itemIndex + padding.top;
SetChildAlongAxis(row.rect, 1, pos, size);
}
}
private static ItemRow PopEndRow(List <ItemRow> rows)
{
if (rows == null || rows.Count == 0)
{
return(null);
}
int index = rows.Count - 1;
ItemRow row = rows[index];
rows.RemoveAt(index);
return(row);
}
private float GetItemHeight()
{
if (m_itemHeight > 0)
{
return(m_itemHeight);
}
m_itemHeight = ItemRow.GetItemHeight(itemPrefab);
if (m_itemHeight < 1)
{
m_itemHeight = 20;
}
return(m_itemHeight);
}
// Invisible items which are in range should be visible.
public bool ProcessInvisibleItemsInRange(int beginItemIndex, int endItemIndex)
{
bool hasOccurred = false;
for (int i = beginItemIndex; i < endItemIndex; i++)
{
if (!IsVisibleItem(i))
{
ItemRow row = RequestRow(i);
m_visibleRows.Add(row);
hasOccurred |= true;
}
}
return(hasOccurred);
}
// Visible items which are not in range should be invisible.
public bool ProcessVisibleItemsNotInRange(int beginItemIndex, int endItemIndex)
{
bool hasOccurred = false;
for (int i = m_visibleRows.Count - 1; i >= 0; i--)
{
ItemRow row = m_visibleRows[i];
if ((row.itemIndex < beginItemIndex) || (row.itemIndex >= endItemIndex))
{
m_poolRows.Add(row);
m_visibleRows.RemoveAt(i);
hasOccurred |= true;
}
}
return(hasOccurred);
}
private void SetRow(ItemRow row, int itemIndex)
{
row.itemIndex = itemIndex;
row.item = m_itemContainer.GetItem(itemIndex);
bool isOddRow = (itemIndex % 2 != 0) ? true : false;
bool isSelected = false;
object curSelectedItem = m_itemContainer.GetCurSelectedItem();
if ((curSelectedItem != null) && (row.item == curSelectedItem))
{
isSelected = true;
}
row.drawer.Draw(row.item, isOddRow, isSelected);
}
private ItemRow CreateRow()
{
ItemRow row = ItemRow.Create(rectTransform, itemPrefab);
return(row);
}