public virtual bool Raycast(Vector2 sp, Camera eventCamera)
{
if (!isActiveAndEnabled)
{
return(false);
}
var t = transform;
var components = ListPool <Component> .Get();
bool ignoreParentGroups = false;
bool continueTraversal = true;
while (t != null)
{
t.GetComponents(components);
for (var i = 0; i < components.Count; i++)
{
var canvas = components[i] as Canvas;
if (canvas != null && canvas.overrideSorting)
{
continueTraversal = false;
}
var filter = components[i] as ICanvasRaycastFilter;
if (filter == null)
{
continue;
}
var raycastValid = true;
var group = components[i] as CanvasGroup;
if (group != null)
{
if (ignoreParentGroups == false && group.ignoreParentGroups)
{
ignoreParentGroups = true;
raycastValid = filter.IsRaycastLocationValid(sp, eventCamera);
}
else if (!ignoreParentGroups)
{
raycastValid = filter.IsRaycastLocationValid(sp, eventCamera);
}
}
else
{
raycastValid = filter.IsRaycastLocationValid(sp, eventCamera);
}
if (!raycastValid)
{
ListPool <Component> .Release(components);
return(false);
}
}
t = continueTraversal ? t.parent : null;
}
ListPool <Component> .Release(components);
return(true);
}
/// <summary>
/// Show the dropdown.
///
/// Plan for dropdown scrolling to ensure dropdown is contained within screen.
///
/// We assume the Canvas is the screen that the dropdown must be kept inside.
/// This is always valid for screen space canvas modes.
/// For world space canvases we don't know how it's used, but it could be e.g. for an in-game monitor.
/// We consider it a fair constraint that the canvas must be big enough to contain dropdowns.
/// </summary>
public void Show()
{
if (!IsActive() || !IsInteractable() || m_Dropdown != null)
{
return;
}
// Get root Canvas.
var list = ListPool <Canvas> .Get();
gameObject.GetComponentsInParent(false, list);
if (list.Count == 0)
{
return;
}
// case 1064466 rootCanvas should be last element returned by GetComponentsInParent()
var listCount = list.Count;
Canvas rootCanvas = list[listCount - 1];
for (int i = 0; i < listCount; i++)
{
if (list[i].isRootCanvas || list[i].overrideSorting)
{
rootCanvas = list[i];
break;
}
}
ListPool <Canvas> .Release(list);
if (!validTemplate)
{
SetupTemplate(rootCanvas);
if (!validTemplate)
{
return;
}
}
m_Template.gameObject.SetActive(true);
// Instantiate the drop-down template
m_Dropdown = CreateDropdownList(m_Template.gameObject);
m_Dropdown.name = "Dropdown List";
m_Dropdown.SetActive(true);
// Make drop-down RectTransform have same values as original.
RectTransform dropdownRectTransform = m_Dropdown.transform as RectTransform;
dropdownRectTransform.SetParent(m_Template.transform.parent, false);
// Instantiate the drop-down list items
// Find the dropdown item and disable it.
DropdownItem itemTemplate = m_Dropdown.GetComponentInChildren <DropdownItem>();
GameObject content = itemTemplate.rectTransform.parent.gameObject;
RectTransform contentRectTransform = content.transform as RectTransform;
itemTemplate.rectTransform.gameObject.SetActive(true);
// Get the rects of the dropdown and item
Rect dropdownContentRect = contentRectTransform.rect;
Rect itemTemplateRect = itemTemplate.rectTransform.rect;
// Calculate the visual offset between the item's edges and the background's edges
Vector2 offsetMin = itemTemplateRect.min - dropdownContentRect.min + (Vector2)itemTemplate.rectTransform.localPosition;
Vector2 offsetMax = itemTemplateRect.max - dropdownContentRect.max + (Vector2)itemTemplate.rectTransform.localPosition;
Vector2 itemSize = itemTemplateRect.size;
m_Items.Clear();
Toggle prev = null;
var optionsCount = options.Count;
for (int i = 0; i < optionsCount; ++i)
{
OptionData data = options[i];
DropdownItem item = AddItem(data, value == i, itemTemplate, m_Items);
if (item == null)
{
continue;
}
// Automatically set up a toggle state change listener
item.toggle.isOn = value == i;
item.toggle.onValueChanged.AddListener(x => OnSelectItem(item.toggle));
// Select current option
if (item.toggle.isOn)
{
item.toggle.Select();
}
// Automatically set up explicit navigation
if (prev != null)
{
Navigation prevNav = prev.navigation;
Navigation toggleNav = item.toggle.navigation;
prevNav.mode = Navigation.Mode.Explicit;
toggleNav.mode = Navigation.Mode.Explicit;
prevNav.selectOnDown = item.toggle;
prevNav.selectOnRight = item.toggle;
toggleNav.selectOnLeft = prev;
toggleNav.selectOnUp = prev;
prev.navigation = prevNav;
item.toggle.navigation = toggleNav;
}
prev = item.toggle;
}
// Reposition all items now that all of them have been added
Vector2 sizeDelta = contentRectTransform.sizeDelta;
sizeDelta.y = itemSize.y * m_Items.Count + offsetMin.y - offsetMax.y;
contentRectTransform.sizeDelta = sizeDelta;
float extraSpace = dropdownRectTransform.rect.height - contentRectTransform.rect.height;
if (extraSpace > 0)
{
dropdownRectTransform.sizeDelta = new Vector2(dropdownRectTransform.sizeDelta.x, dropdownRectTransform.sizeDelta.y - extraSpace);
}
// Invert anchoring and position if dropdown is partially or fully outside of canvas rect.
// Typically this will have the effect of placing the dropdown above the button instead of below,
// but it works as inversion regardless of initial setup.
Vector3[] corners = new Vector3[4];
dropdownRectTransform.GetWorldCorners(corners);
RectTransform rootCanvasRectTransform = rootCanvas.transform as RectTransform;
Rect rootCanvasRect = rootCanvasRectTransform.rect;
for (int axis = 0; axis < 2; axis++)
{
bool outside = false;
for (int i = 0; i < 4; i++)
{
Vector3 corner = rootCanvasRectTransform.InverseTransformPoint(corners[i]);
if ((corner[axis] < rootCanvasRect.min[axis] && !Mathf.Approximately(corner[axis], rootCanvasRect.min[axis])) ||
(corner[axis] > rootCanvasRect.max[axis] && !Mathf.Approximately(corner[axis], rootCanvasRect.max[axis])))
{
outside = true;
break;
}
}
if (outside)
{
RectTransformUtility.FlipLayoutOnAxis(dropdownRectTransform, axis, false, false);
}
}
var itemsCount = m_Items.Count;
for (int i = 0; i < itemsCount; i++)
{
RectTransform itemRect = m_Items[i].rectTransform;
itemRect.anchorMin = new Vector2(itemRect.anchorMin.x, 0);
itemRect.anchorMax = new Vector2(itemRect.anchorMax.x, 0);
itemRect.anchoredPosition = new Vector2(itemRect.anchoredPosition.x, offsetMin.y + itemSize.y * (itemsCount - 1 - i) + itemSize.y * itemRect.pivot.y);
itemRect.sizeDelta = new Vector2(itemRect.sizeDelta.x, itemSize.y);
}
// Fade in the popup
AlphaFadeList(m_AlphaFadeSpeed, 0f, 1f);
// Make drop-down template and item template inactive
m_Template.gameObject.SetActive(false);
itemTemplate.gameObject.SetActive(false);
m_Blocker = CreateBlocker(rootCanvas);
}
// Show the dropdown.
//
// Plan for dropdown scrolling to ensure dropdown is contained within screen.
//
// We assume the Canvas is the screen that the dropdown must be kept inside.
// This is always valid for screen space canvas modes.
// For world space canvases we don't know how it's used, but it could be e.g. for an in-game monitor.
// We consider it a fair constraint that the canvas must be big enough to contains dropdowns.
public void Show()
{
if (!IsActive() || !IsInteractable() || m_Dropdown != null)
{
return;
}
//初始状态时validTemplate为false来触发对于列表模板的初始化设置
if (!validTemplate)
{
//模板初始化方法：检测并设置模板，初始化模板绑定相关组件并调整模板UI层级，若没有通过检查则模板标记为不可用状态。
SetupTemplate();
//若检测不通过则无法正常显示下拉列表
if (!validTemplate)
{
return;
}
}
// Get root Canvas.
var list = ListPool <Canvas> .Get();
gameObject.GetComponentsInParent(false, list);
if (list.Count == 0)
{
return;
}
//获取父级路径下最近的canvas
Canvas rootCanvas = list[0];
ListPool <Canvas> .Release(list);
//显示模板准备复制列表
m_Template.gameObject.SetActive(true);
// Instantiate the drop-down template
//复制列表模板
m_Dropdown = CreateDropdownList(m_Template.gameObject);
//进行改名
m_Dropdown.name = "Dropdown List";
m_Dropdown.SetActive(true);
// Make drop-down RectTransform have same values as original.
// 设置新的列表模板的父级
RectTransform dropdownRectTransform = m_Dropdown.transform as RectTransform;
dropdownRectTransform.SetParent(m_Template.transform.parent, false);
// Instantiate the drop-down list items
// 创建列表Item
// Find the dropdown item and disable it.
DropdownItem itemTemplate = m_Dropdown.GetComponentInChildren <DropdownItem>();
GameObject content = itemTemplate.rectTransform.parent.gameObject;
RectTransform contentRectTransform = content.transform as RectTransform;
itemTemplate.rectTransform.gameObject.SetActive(true);
// Get the rects of the dropdown and item
Rect dropdownContentRect = contentRectTransform.rect;
Rect itemTemplateRect = itemTemplate.rectTransform.rect;
// Calculate the visual offset between the item's edges and the background's edges
//计算Item与背景边界的偏移量
Vector2 offsetMin = itemTemplateRect.min - dropdownContentRect.min + (Vector2)itemTemplate.rectTransform.localPosition;
Vector2 offsetMax = itemTemplateRect.max - dropdownContentRect.max + (Vector2)itemTemplate.rectTransform.localPosition;
Vector2 itemSize = itemTemplateRect.size;
//清空DropdownItem List 准备开始选项Itme的创建
m_Items.Clear();
Toggle prev = null;
for (int i = 0; i < options.Count; ++i)
{
OptionData data = options[i];
//创建Item
DropdownItem item = AddItem(data, value == i, itemTemplate, m_Items);
if (item == null)
{
continue;
}
// Automatically set up a toggle state change listener
// 设置toggle初始状态以及注册事件监听
item.toggle.isOn = value == i;
item.toggle.onValueChanged.AddListener(x => OnSelectItem(item.toggle));
// Select current option
//标记当前选项
if (item.toggle.isOn)
{
item.toggle.Select();
}
// Automatically set up explicit navigation
// 设置Item的导航
if (prev != null)
{
Navigation prevNav = prev.navigation;
Navigation toggleNav = item.toggle.navigation;
prevNav.mode = Navigation.Mode.Explicit;
toggleNav.mode = Navigation.Mode.Explicit;
prevNav.selectOnDown = item.toggle;
prevNav.selectOnRight = item.toggle;
toggleNav.selectOnLeft = prev;
toggleNav.selectOnUp = prev;
prev.navigation = prevNav;
item.toggle.navigation = toggleNav;
}
prev = item.toggle;
}
// Reposition all items now that all of them have been added
// 计算内容区域的高度
Vector2 sizeDelta = contentRectTransform.sizeDelta;
sizeDelta.y = itemSize.y * m_Items.Count + offsetMin.y - offsetMax.y;
contentRectTransform.sizeDelta = sizeDelta;
//计算是否有额外空区域（当内容区域小于列表本身的区域时调整列表大小）
float extraSpace = dropdownRectTransform.rect.height - contentRectTransform.rect.height;
if (extraSpace > 0)
{
dropdownRectTransform.sizeDelta = new Vector2(dropdownRectTransform.sizeDelta.x, dropdownRectTransform.sizeDelta.y - extraSpace);
}
// Invert anchoring and position if dropdown is partially or fully outside of canvas rect.
// Typically this will have the effect of placing the dropdown above the button instead of below,
// but it works as inversion regardless of initial setup.
// 当列表处于canvas外部时，将其按坐标轴进行翻转
Vector3[] corners = new Vector3[4];
dropdownRectTransform.GetWorldCorners(corners);
RectTransform rootCanvasRectTransform = rootCanvas.transform as RectTransform;
Rect rootCanvasRect = rootCanvasRectTransform.rect;
for (int axis = 0; axis < 2; axis++)
{
bool outside = false;
for (int i = 0; i < 4; i++)
{
Vector3 corner = rootCanvasRectTransform.InverseTransformPoint(corners[i]);
if (corner[axis] < rootCanvasRect.min[axis] || corner[axis] > rootCanvasRect.max[axis])
{
outside = true;
break;
}
}
if (outside)
{
RectTransformUtility.FlipLayoutOnAxis(dropdownRectTransform, axis, false, false);
}
}
for (int i = 0; i < m_Items.Count; i++)
{
RectTransform itemRect = m_Items[i].rectTransform;
itemRect.anchorMin = new Vector2(itemRect.anchorMin.x, 0);
itemRect.anchorMax = new Vector2(itemRect.anchorMax.x, 0);
itemRect.anchoredPosition = new Vector2(itemRect.anchoredPosition.x, offsetMin.y + itemSize.y * (m_Items.Count - 1 - i) + itemSize.y * itemRect.pivot.y);
itemRect.sizeDelta = new Vector2(itemRect.sizeDelta.x, itemSize.y);
}
// Fade in the popup
// 下拉列表渐出效果
AlphaFadeList(0.15f, 0f, 1f);
// Make drop-down template and item template inactive
// 隐藏模板
m_Template.gameObject.SetActive(false);
itemTemplate.gameObject.SetActive(false);
// 创建拦截模板,用于监听点击事件来隐藏下拉列表,层级会低于下拉列表(2999)
m_Blocker = CreateBlocker(rootCanvas);
}
public virtual bool Raycast(Vector2 sp, Camera eventCamera)
{
bool result;
if (!base.isActiveAndEnabled)
{
result = false;
}
else
{
Transform transform = base.transform;
List <Component> list = ListPool <Component> .Get();
bool flag = false;
bool flag2 = true;
while (transform != null)
{
transform.GetComponents <Component>(list);
for (int i = 0; i < list.Count; i++)
{
Canvas canvas = list[i] as Canvas;
if (canvas != null && canvas.overrideSorting)
{
flag2 = false;
}
ICanvasRaycastFilter canvasRaycastFilter = list[i] as ICanvasRaycastFilter;
if (canvasRaycastFilter != null)
{
bool flag3 = true;
CanvasGroup canvasGroup = list[i] as CanvasGroup;
if (canvasGroup != null)
{
if (!flag && canvasGroup.ignoreParentGroups)
{
flag = true;
flag3 = canvasRaycastFilter.IsRaycastLocationValid(sp, eventCamera);
}
else if (!flag)
{
flag3 = canvasRaycastFilter.IsRaycastLocationValid(sp, eventCamera);
}
}
else
{
flag3 = canvasRaycastFilter.IsRaycastLocationValid(sp, eventCamera);
}
if (!flag3)
{
ListPool <Component> .Release(list);
result = false;
return(result);
}
}
}
transform = ((!flag2) ? null : transform.parent);
}
ListPool <Component> .Release(list);
result = true;
}
return(result);
}
private void OnCombineMesh()
{
RichText[] texts = GetComponentsInChildren <RichText>(false);
RichImage[] images = GetComponentsInChildren <RichImage>(false);
var meshCount = texts.Length + images.Length;
if (meshCount == 0)
{
if (m_mesh)
{
m_mesh.Clear();
}
if (m_meshRender)
{
m_meshRender.enabled = false;
}
return;
}
if (m_meshRender == null)
{
m_meshRender = gameObject.GetOrAddComponent <MeshRenderer>();
m_meshRender.hideFlags = MeshHideflags;
m_meshFilter = gameObject.GetOrAddComponent <MeshFilter>();
m_meshFilter.hideFlags = MeshHideflags;
m_mesh = new Mesh();
m_mesh.MarkDynamic();
m_mesh.hideFlags = MeshHideflags;
}
Material material = null;
var meshes = ListPool <MeshOrder> .Get();
var worldToLocalMatrix = this.transform.worldToLocalMatrix;
for (int i = 0; i < images.Length; ++i)
{
var image = images[i];
if (!image.IsActive())
{
continue;
}
var mesh = image.Mesh();
if (mesh == null)
{
continue;
}
var meshOrder = new MeshOrder();
meshOrder.mesh = mesh;
meshOrder.matrix = worldToLocalMatrix * image.transform.localToWorldMatrix;
meshOrder.z = image.transform.localPosition.z;
meshes.Add(meshOrder);
if (material == null)
{
material = image.material;
}
}
for (int j = 0; j < texts.Length; ++j)
{
var text = texts[j];
if (!text.IsActive())
{
continue;
}
var mesh = text.Mesh();
if (mesh == null)
{
continue;
}
var meshOrder = new MeshOrder();
meshOrder.mesh = mesh;
meshOrder.matrix = worldToLocalMatrix * text.transform.localToWorldMatrix;
meshOrder.z = text.transform.localPosition.z;
meshes.Add(meshOrder);
if (material == null)
{
material = text.material;
}
}
if (meshes.Count == 0)
{
if (m_meshRender)
{
m_meshRender.enabled = false;
}
return;
}
m_meshRender.enabled = true;
meshes.Sort((lhs, rhs) => rhs.z.CompareTo(lhs.z));
CombineInstance[] combine = new CombineInstance[meshes.Count];
for (int i = 0; i < meshes.Count; ++i)
{
combine[i].mesh = meshes[i].mesh;
combine[i].transform = meshes[i].matrix;
}
ListPool <MeshOrder> .Release(meshes);
m_mesh.CombineMeshes(combine, true);
m_meshFilter.sharedMesh = m_mesh;
m_meshRender.sharedMaterial = material;
}
public void Show()
{
if (this.IsActive() && this.IsInteractable() && !(this.m_Dropdown != null))
{
if (!this.validTemplate)
{
this.SetupTemplate();
if (!this.validTemplate)
{
return;
}
}
List <Canvas> list = ListPool <Canvas> .Get();
base.gameObject.GetComponentsInParent <Canvas>(false, list);
if (list.Count != 0)
{
Canvas canvas = list[0];
ListPool <Canvas> .Release(list);
this.m_Template.gameObject.SetActive(true);
this.m_Dropdown = this.CreateDropdownList(this.m_Template.gameObject);
this.m_Dropdown.name = "Dropdown List";
this.m_Dropdown.SetActive(true);
RectTransform rectTransform = this.m_Dropdown.transform as RectTransform;
rectTransform.SetParent(this.m_Template.transform.parent, false);
Dropdown.DropdownItem componentInChildren = this.m_Dropdown.GetComponentInChildren <Dropdown.DropdownItem>();
GameObject gameObject = componentInChildren.rectTransform.parent.gameObject;
RectTransform rectTransform2 = gameObject.transform as RectTransform;
componentInChildren.rectTransform.gameObject.SetActive(true);
Rect rect = rectTransform2.rect;
Rect rect2 = componentInChildren.rectTransform.rect;
Vector2 vector = rect2.min - rect.min + componentInChildren.rectTransform.localPosition;
Vector2 vector2 = rect2.max - rect.max + componentInChildren.rectTransform.localPosition;
Vector2 size = rect2.size;
this.m_Items.Clear();
Toggle toggle = null;
for (int i = 0; i < this.options.Count; i++)
{
Dropdown.OptionData data = this.options[i];
Dropdown.DropdownItem item = this.AddItem(data, this.value == i, componentInChildren, this.m_Items);
if (!(item == null))
{
item.toggle.isOn = (this.value == i);
item.toggle.onValueChanged.AddListener(delegate(bool x)
{
this.OnSelectItem(item.toggle);
});
if (item.toggle.isOn)
{
item.toggle.Select();
}
if (toggle != null)
{
Navigation navigation = toggle.navigation;
Navigation navigation2 = item.toggle.navigation;
navigation.mode = Navigation.Mode.Explicit;
navigation2.mode = Navigation.Mode.Explicit;
navigation.selectOnDown = item.toggle;
navigation.selectOnRight = item.toggle;
navigation2.selectOnLeft = toggle;
navigation2.selectOnUp = toggle;
toggle.navigation = navigation;
item.toggle.navigation = navigation2;
}
toggle = item.toggle;
}
}
Vector2 sizeDelta = rectTransform2.sizeDelta;
sizeDelta.y = size.y * (float)this.m_Items.Count + vector.y - vector2.y;
rectTransform2.sizeDelta = sizeDelta;
float num = rectTransform.rect.height - rectTransform2.rect.height;
if (num > 0f)
{
rectTransform.sizeDelta = new Vector2(rectTransform.sizeDelta.x, rectTransform.sizeDelta.y - num);
}
Vector3[] array = new Vector3[4];
rectTransform.GetWorldCorners(array);
RectTransform rectTransform3 = canvas.transform as RectTransform;
Rect rect3 = rectTransform3.rect;
for (int j = 0; j < 2; j++)
{
bool flag = false;
for (int k = 0; k < 4; k++)
{
Vector3 vector3 = rectTransform3.InverseTransformPoint(array[k]);
if (vector3[j] < rect3.min[j] || vector3[j] > rect3.max[j])
{
flag = true;
break;
}
}
if (flag)
{
RectTransformUtility.FlipLayoutOnAxis(rectTransform, j, false, false);
}
}
for (int l = 0; l < this.m_Items.Count; l++)
{
RectTransform rectTransform4 = this.m_Items[l].rectTransform;
rectTransform4.anchorMin = new Vector2(rectTransform4.anchorMin.x, 0f);
rectTransform4.anchorMax = new Vector2(rectTransform4.anchorMax.x, 0f);
rectTransform4.anchoredPosition = new Vector2(rectTransform4.anchoredPosition.x, vector.y + size.y * (float)(this.m_Items.Count - 1 - l) + size.y * rectTransform4.pivot.y);
rectTransform4.sizeDelta = new Vector2(rectTransform4.sizeDelta.x, size.y);
}
this.AlphaFadeList(0.15f, 0f, 1f);
this.m_Template.gameObject.SetActive(false);
componentInChildren.gameObject.SetActive(false);
this.m_Blocker = this.CreateBlocker(canvas);
}
}
}