【前端接口】拾取提示：地面物品名字的悬浮标签实现

-- 订阅地面物品列表消息，首次创建悬浮标签
local tipLabel = nil
local function onPickList(player, msgId, w1, w2, w3, sMsg)
    if tipLabel == nil then
        tipLabel = GUI:Text_Create(GUI:GetParent("MainTop"), "PickTip", 20, 60, "", 260, 20)
        GUI:Attach_MainTop(tipLabel)
    end
    GUI:setText(tipLabel, sMsg)
end
SL:RegisterLuaNetMsg(9201, onPickList, nil)

-- 800 毫秒节流刷新最近物品名
local lastTick = 0
local function refreshTip(items)
    local now = SL:GetTickCount and SL:GetTickCount() or os.clock() * 1000
    if now - lastTick < 800 then return end
    lastTick = now
    local best, bestDist = nil, 300
    for i = 1, #items do
        if items[i].dist < bestDist then
            best = items[i]
            bestDist = items[i].dist
        end
    end
    if best then
        GUI:setText(tipLabel, best.name .. " 距离 " .. math.floor(bestDist))
    else
        GUI:setText(tipLabel, "")
    end
end