【界面UI】滑条控件：画质调节与音量控制

---滑条控件：范围、步进与实时回调
function Slider.create(win, key, minV, maxV, step, def)
    local bar = GUI:Slider_Create(win, "sl_" .. key,
        10, 10, 200, 20)
    GUI:Slider_setRange(bar, minV, maxV, step)
    GUI:Slider_setValue(bar, Settings.get(key) or def)
    GUI:addOnClickEvent(bar, function()
        local v = GUI:Slider_getValue(bar)
        Slider.onChange(key, v)
    end)
end

---音量的调节：实时生效
function Slider.onChange(key, v)
    if key == 'volume' then
        Audio.setVolume(v / 100)
    end
    Settings.set(key, v)
end

---滑条与数值输入的双向绑定
function Slider.bindNumber(bar, numInput)
    GUI:addOnClickEvent(numInput, function()
        local v = GUI:TextInput_GetText(numInput)
        local n = tonumber(v)
        if n then
            GUI:Slider_setValue(bar, n)
            Slider.onChange(bar.key, n)
        end
    end)
end

---设置的持久化：退出前批量保存
setontimerex(136, 60)
function Slider.save()
    if Slider.dirty then
        Settings.persistAll()
        Slider.dirty = false
    end
end