yzyCli/u3d/Lua/newgameui/DropDown.lua

--[[
	info_list:格式为 {{"名称", call_back}}
]]
DropDown = DropDown or BaseClass(BaseItem)

DropDown.TYPE = {
	UP = 1,		--上拉
	DOWN = 2,	--下拉
}

local GetChildTexts = GetChildTexts
local GetChildGameObjects = GetChildGameObjects
local GetChildTransforms = GetChildTransforms

function DropDown:__init(parent_wnd)
	self.base_file = "uiComponent"
	self.layout_file = "DropDown"

	self.max_height = 200
	self.item_list = {}
	self.is_open = false
	self:SetLayerName()
	self.callback = nil
	self.is_item_select = false

	self:Load()
end

function DropDown:__delete()
	if self.delay_timer then
		GlobalTimerQuest:CancelQuest(self.delay_timer)
		self.delay_timer = nil
	end

	for i, v in ipairs(self.item_list) do
		v:DeleteMe()
		v = nil
	end
	self.item_list = {}
end

function DropDown:Load_callback()

	self.select,
	self.item_content,
	self.Btn
	= GetChildTransforms(self.transform, 
	{
		"Select",
		"Select/ScrollView/Viewport/Content",
		"btn",
	})

	self.main_text
	= GetChildTexts(self.transform, 
	{
		"bg/text",
	})

	self.bg_obj,
	self.redDot
	= GetChildGameObjects(self.transform, 
	{
		"bg",
		"bg/redDot",
	})

	self:InitEvent()

	self.redDot:SetActive(self.is_show_redDot)

	--确认active再执行，否则overrideSorting勾选不上
	local function delay_func()
		if not IsNull(self.gameObject) and self.gameObject.activeInHierarchy then
			if self.delay_timer then
				GlobalTimerQuest:CancelQuest(self.delay_timer)
				self.delay_timer = nil
			end
			self:SetUIDepth(self.gameObject)
		end
	end
	self.delay_timer = GlobalTimerQuest:AddPeriodQuest(delay_func, 0.01, -1)

	if self.need_refresh then
		self:SetData(self.info_list, self._type, self.run_first, self.callback, self.default_index, self.is_item_select)
	end
	if self.need_refreshView then
		self:SetViewType(self.view_type)
	end
end

--提高一个层次  确保覆盖在特效之上
function DropDown:SetLayerName()
	self.layer_name = self.layer_name or "UI"
	if self.layer_name == "UI" then
		self.layer_name = "Activity"
	elseif self.layer_name == "Activity" then
		self.layer_name = "Top"
	end
end

function DropDown:InitEvent()
	local function click_func(target)
		if target == self.Btn.gameObject or target == self.bg_obj then
			self:ChangeState(not self.is_open)
			if self.callback then
				self.callback()
			end
		end
	end
	AddClickEvent(self.Btn.gameObject, click_func)
	AddClickEvent(self.bg_obj, click_func)
end

function DropDown:SetData(info_list, _type, run_first, callback, default_index, is_item_select)
	self._type = _type or DropDown.TYPE.UP
	self.info_list = info_list or {}
	self.run_first = run_first
	self.callback = callback
	self.default_index = default_index
	self.is_item_select = is_item_select
	
	if self.is_loaded then
		local function call_back(name)
			self:ChangeState(false)
			self.main_text.text = name
			self:SetItemSelect(name)
		end

		for i, v in ipairs(self.item_list) do
			v:SetVisible(false)
		end

		for i, v in ipairs(self.info_list) do
			local item = self.item_list[i]
			if not item then
				item = DropDownItem.New(self.item_content)
				self.item_list[i] = item
			end
			item:SetVisible(true)
			item:SetData(v[1], v[2], call_back)
		end
		--下拉过长时只显示4个
		local len = #self.info_list < 5 and #self.info_list or 4.5
		local height = (DropDownItem.HEIGHT + 2) * (len+0.5)
		--height = height <= 200 and height or 200
		self.select.sizeDelta = Vector2(self.select.sizeDelta.x, height)
		--self.item_content.sizeDelta = Vector2(self.item_content.sizeDelta.x, DropDownItem.HEIGHT * #self.info_list + 10)

		--初始化
		self:ChangeState(false)
		default_index = default_index or 1
		if self.info_list[default_index] and self.info_list[default_index][1] then
			self.main_text.text = self.info_list[default_index][1]
		end
		if self.run_first then
			self:SetSelectIndex(default_index)
		end

		if self._type == DropDown.TYPE.DOWN then
			local size = self.select.sizeDelta
			SetAnchoredPosition(self.select, 0, -size.y - 50)
		end

		if self.cache_redDot_list then
			self:ShowRedDot(self.cache_redDot_list)
			self.cache_redDot_list = nil
		end
	else
		self.need_refresh = true
	end
end

function DropDown:SetViewType(view_type)
	self.view_type = view_type
	if self.is_loaded then
		if view_type then
			if view_type == 1 then
				lua_resM:setImageSprite(self, self.bg_obj.transform:GetComponent("Image"), "common_asset", "tips_k")
			end
		end
	else
		self.need_refreshView = true
	end
end

function DropDown:ChangeState(bool)
	self.is_open = bool
	self.select.gameObject:SetActive(bool)
	self.Btn.localRotation = bool and Vector3(0,0,180) or Vector3(0,0,0)
end

function DropDown:SetSelectIndex(index)
	if self.item_list[index] then
		self.item_list[index]:SetSelected()
	end
end

function DropDown:SetItemSelect(name)
	local index = 1
	for k,v in pairs(self.info_list) do
		if v and v[1] and v[1] == name then
			index = k
			break
		end
	end
	if self.is_item_select then
		if self.last_index and self.last_index == index then
			return
		end
		if self.last_index then
			self.item_list[self.last_index]:SelectStatus(false)
		end
		self.item_list[index]:SelectStatus(true)
		self.last_index = index
	end
end

function DropDown:ShowRedDot(list)
	if self.is_loaded and self.item_list and #self.item_list > 0 then
		local show = false
		for i, v in ipairs(self.item_list) do
			v:ShowRedDot(list[i])
			show = show or list[i]
		end

		self.is_show_redDot = show
		if self.is_loaded then
			self.redDot:SetActive(show)
		end
	else
		self.cache_redDot_list = list
	end
end