【界面UI】全服跑马灯：公告队列与优先级

---跑马灯：公告队列与优先级排序
Marquee.queue = {}

function Marquee.push(text, priority, duration)
    table.insert(Marquee.queue, {
        text = text, priority = priority or 3,
        duration = duration or 8,
    })
end

---展示的调度：高优先级先出
setontimerex(145, 1)
function Marquee.tick()
    if #Marquee.queue == 0 then return end
    table.sort(Marquee.queue, function(a, b)
        return a.priority < b.priority
    end)
    local msg = table.remove(Marquee.queue, 1)
    Marquee.display(msg.text, msg.duration)
end

---滚动的动画：文字从右向左平移
function Marquee.display(text, duration)
    local label = GUI:Text_Create(Marquee.node,
        "marquee", Screen.width(), 10, 16, "#FFD700", text)
    local width = GUI:Text_GetWidth(label)
    local speed = (Screen.width() + width) / duration
    SL:Schedule(0.016, function()
        local x = GUI:GetPosition(label)
        x = x - speed * 0.016
        GUI:SetPosition(label, x, 10)
        if x < -width then
            GUI:RemoveNode(label)
            SL:StopSchedule()
        end
    end)
end