/// 创建Element
protected UIListViewItem CreateElement(int index, ref stRect rect)
{
UIListViewItem elementScript = null;
//找
if (m_unUsedElementScripts.Count > 0)
{
elementScript = m_unUsedElementScripts[0];
m_unUsedElementScripts.RemoveAt(0);
}
else if (m_elementTemplate != null)
{
//克隆
GameObject elementObject = Instantiate(m_elementTemplate);
elementObject.transform.SetParent(m_content.transform);
elementObject.transform.localScale = Vector3.one;
//初始化
InitializeComponent(elementObject);
//
elementScript = elementObject.GetComponent <UIListViewItem>();
}
if (elementScript != null)
{
elementScript.Enable(this, index, m_elementName, ref rect, IsSelectedIndex(index));
m_elementScripts.Add(elementScript);
//JW.Common.Log.LogD("Dispatch Element On Create Event, index = " + index);
if (OnEnableItemHandler != null)
{
OnEnableItemHandler(elementScript);
}
}
return(elementScript);
}
/// 回收Element
protected void RecycleElement(UIListViewItem elementScript, bool disableElement)
{
if (disableElement)
{
elementScript.Disable();
}
m_elementScripts.Remove(elementScript);
m_unUsedElementScripts.Add(elementScript);
}
/// 回收Element
protected void RecycleElement(bool disableElement)
{
//将当前所有elements设置为unUsed
while (m_elementScripts.Count > 0)
{
UIListViewItem elementScript = m_elementScripts[0];
m_elementScripts.RemoveAt(0);
if (disableElement)
{
elementScript.Disable();
}
m_unUsedElementScripts.Add(elementScript);
}
}
/// 设置选中元素
/// @index
/// @isDispatchSelectedChangeEvent
public virtual void SelectElement(int index, bool isDispatchSelectedChangeEvent = true)
{
m_lastSelectedElementIndex = m_selectedElementIndex;
m_selectedElementIndex = index;
if (m_lastSelectedElementIndex == m_selectedElementIndex)
{
if (m_alwaysDispatchSelectedChangeEvent)
{
//派发事件
DispatchElementSelectChangedEvent();
}
return;
}
if (m_lastSelectedElementIndex >= 0)
{
UIListViewItem elementScript = GetElemenet(m_lastSelectedElementIndex);
if (elementScript != null)
{
elementScript.ChangeDisplay(false);
}
}
if (m_selectedElementIndex >= 0)
{
UIListViewItem elementScript = GetElemenet(m_selectedElementIndex);
if (elementScript != null)
{
elementScript.ChangeDisplay(true);
}
}
//派发事件
if (isDispatchSelectedChangeEvent)
{
DispatchElementSelectChangedEvent();
}
}
// 初始化
public override void Initialize(UIForm formScript)
{
if (_isInited)
{
return;
}
base.Initialize(formScript);
m_selectedElementIndex = -1;
m_lastSelectedElementIndex = -1;
//初始化Scroll Content
m_scrollRect = GetComponentInChildren <ScrollRect>(gameObject);
if (m_scrollRect != null)
{
m_scrollRect.enabled = false;
RectTransform scrollRectRectTransform = m_scrollRect.transform as RectTransform;
m_scrollAreaSize = new Vector2(scrollRectRectTransform.rect.width, scrollRectRectTransform.rect.height);
m_content = m_scrollRect.content.gameObject;
}
//初始化ScrollBar
m_scrollBar = GetComponentInChildren <Scrollbar>(gameObject);
if (m_listType == UIListViewType.Vertical || m_listType == UIListViewType.VerticalGrid)
{
if (m_scrollBar != null)
{
m_scrollBar.direction = Scrollbar.Direction.BottomToTop;
}
JW.Common.Log.Assert(m_scrollRect != null);
if (m_scrollRect != null)
{
m_scrollRect.horizontal = false;
m_scrollRect.vertical = true;
m_scrollRect.horizontalScrollbar = null;
m_scrollRect.verticalScrollbar = m_scrollBar;
}
}
else if (m_listType == UIListViewType.Horizontal || m_listType == UIListViewType.HorizontalGrid)
{
if (m_scrollBar != null)
{
m_scrollBar.direction = Scrollbar.Direction.LeftToRight;
}
JW.Common.Log.Assert(m_scrollRect != null);
if (m_scrollRect != null)
{
m_scrollRect.horizontal = true;
m_scrollRect.vertical = false;
m_scrollRect.horizontalScrollbar = m_scrollBar;
m_scrollRect.verticalScrollbar = null;
}
}
//初始化元素列表
m_elementScripts = new JW.Common.JWObjList <UIListViewItem>();
m_unUsedElementScripts = new JW.Common.JWObjList <UIListViewItem>();
if (m_useOptimized)
{
m_elementsRect = new List <stRect>();
}
//模板
UIListViewItem listElementScript = null;
listElementScript = GetComponentInChildren <UIListViewItem>(gameObject);
if (listElementScript != null)
{
listElementScript.Initialize(formScript);
m_elementTemplate = listElementScript.gameObject;
m_elementName = listElementScript.gameObject.name;
m_elementDefaultSize = listElementScript.m_defaultSize;
//
if (m_elementTemplate != null)
{
m_elementTemplate.name = m_elementName + "_Template";
}
}
//初始化为不可见
if (m_elementTemplate != null)
{
UIListViewItem elementScript = m_elementTemplate.GetComponent <UIListViewItem>();
if (elementScript != null && elementScript.m_useSetActiveForDisplay)
{
m_elementTemplate.ExtSetActive(false);
}
else
{
//确保Element被激活
if (!m_elementTemplate.activeSelf)
{
m_elementTemplate.SetActive(true);
}
//为List元素模版添加Canvas Group
CanvasGroup canvasGroup = m_elementTemplate.GetComponent <CanvasGroup>();
if (canvasGroup == null)
{
canvasGroup = m_elementTemplate.AddComponent <CanvasGroup>();
}
canvasGroup.alpha = 0f;
canvasGroup.blocksRaycasts = false;
}
}
//初始化content位置
if (m_content != null)
{
m_contentRectTransform = m_content.transform as RectTransform;
m_contentRectTransform.pivot = new Vector2(0, 1);
m_contentRectTransform.anchorMin = new Vector2(0, 1);
m_contentRectTransform.anchorMax = new Vector2(0, 1);
m_contentRectTransform.anchoredPosition = Vector2.zero;
m_contentRectTransform.localRotation = Quaternion.identity;
m_contentRectTransform.localScale = new Vector3(1, 1, 1);
m_lastContentPosition = m_contentRectTransform.anchoredPosition;
}
//初始化extraContent if exist
if (m_extraContent != null)
{
RectTransform extraContentTransform = m_extraContent.transform as RectTransform;
extraContentTransform.pivot = new Vector2(0, 1);
extraContentTransform.anchorMin = new Vector2(0, 1);
extraContentTransform.anchorMax = new Vector2(0, 1);
extraContentTransform.anchoredPosition = Vector2.zero;
extraContentTransform.localRotation = Quaternion.identity;
extraContentTransform.localScale = Vector3.one;
//宽度与listElement保持一致
if (m_elementTemplate != null)
{
extraContentTransform.sizeDelta = new Vector2((m_elementTemplate.transform as RectTransform).rect.width, extraContentTransform.sizeDelta.y);
}
if (extraContentTransform.parent != null && m_content != null)
{
extraContentTransform.parent.SetParent(m_content.transform);
}
m_extraContent.SetActive(false);
}
SetElementAmount(m_elementAmount);
}