public void AppendView(List <ProgramInfo> programInfos)
{
if (searchProgramItems.Count + programInfos.Count > Constants.MaxSearchProgramBufferCount)
{
float sp = _rt.rect.height; // start position (display height)
float b = _itemHeight; // block size (item height)
float t = Constants.MaxSearchProgramBufferCount;
float v = scrollbar.value; // current value of scrollbar
float c = t * b * (1 - v) + v * sp; // current position of scrollbar
float n = programInfos.Count; // added block count in the end
float newV = 1 - ((c - n * b) - sp) / (t * b - sp); // new value of scrollbar
scrollbar.value = newV;
int i = 0;
int deleteCount = searchProgramItems.Count + programInfos.Count - Constants.MaxSearchProgramBufferCount;
foreach (Transform child in searchProgramItemParent.transform)
{
if (i < deleteCount)
{
GameObject.Destroy(child.gameObject);
}
else
{
break;
}
i++;
}
searchProgramItems.RemoveRange(0, deleteCount);
}
int startIndex = searchProgramItems.Count;
if (searchProgramItemPrefab != null)
{
for (int i = 0; i < programInfos.Count; i++)
{
GameObject go = GameObject.Instantiate(searchProgramItemPrefab);
if (go != null)
{
UISearchProgramItem item = go.GetComponent <UISearchProgramItem> ();
item.transform.SetParent(searchProgramItemParent.transform);
searchProgramItems.Add(item);
}
}
}
for (int i = 0; i < programInfos.Count; ++i)
{
var item = searchProgramItems [i + startIndex];
item.UpdateItem(programInfos [i]);
}
bool scrollbarActive = searchProgramItems.Count > 0 ? true : false;
scrollbar.gameObject.SetActive(scrollbarActive);
_minScrollValueForAppendingItems = 1 - (float)(searchProgramItems.Count - Constants.ProgramCountForUpdatingBuffer) / (float)searchProgramItems.Count;
if (scrollbar.value < 1)
{
_maxScrollValueForPrependingItems = 1 - _minScrollValueForAppendingItems;
}
}
public void PrependView(List <ProgramInfo> programInfos)
{
if (searchProgramItems.Count + programInfos.Count > Constants.MaxSearchProgramBufferCount)
{
float sp = _rt.rect.height; // start position (display height)
float b = _itemHeight; // block size (item height)
float t = Constants.MaxSearchProgramBufferCount;
float v = scrollbar.value; // current value of scrollbar
float c = t * b * (1 - v) + v * sp; // current position of scrollbar
float n = programInfos.Count; // added block count in the front
float newV = 1 - ((c + n * b) - sp) / (t * b - sp); // new value of scrollbar
scrollbar.value = newV;
int deleteCount = searchProgramItems.Count + programInfos.Count - Constants.MaxSearchProgramBufferCount;
Transform parentTransform = searchProgramItemParent.transform;
int childCount = parentTransform.childCount;
Transform child;
for (int i = 0; i < deleteCount; i++)
{
child = parentTransform.GetChild(childCount - i - 1);
GameObject.Destroy(child.gameObject);
}
searchProgramItems.RemoveRange(searchProgramItems.Count - deleteCount, deleteCount);
}
if (searchProgramItemPrefab != null)
{
_cachedProgramItems.Clear();
for (int i = 0; i < programInfos.Count; i++)
{
GameObject go = GameObject.Instantiate(searchProgramItemPrefab);
if (go != null)
{
UISearchProgramItem item = go.GetComponent <UISearchProgramItem> ();
item.transform.SetParent(searchProgramItemParent.transform);
item.transform.SetSiblingIndex(i);
_cachedProgramItems.Add(item);
}
}
searchProgramItems.InsertRange(0, _cachedProgramItems);
}
for (int i = 0; i < programInfos.Count; ++i)
{
var item = searchProgramItems [i];
item.UpdateItem(programInfos [i]);
}
bool scrollbarActive = searchProgramItems.Count > 0 ? true : false;
scrollbar.gameObject.SetActive(scrollbarActive);
_maxScrollValueForPrependingItems = 1 - (Constants.ProgramCountForUpdatingBuffer / (float)searchProgramItems.Count);
}