【前端接口】成交曲线图：成交数据的图表渲染实现

SL:RegisterLuaNetMsg(9902, function(data)
    local points = data.prices or {}
    local maxV, minV = 0, math.huge
    for _, v in ipairs(points) do
        if v > maxV then maxV = v end
        if v < minV then minV = v end
    end
    for i, v in ipairs(points) do
        local y = chartBase - (v - minV) / (maxV - minV + 1) * chartHeight
        GUI:setPosition(dotWidgets[i], chartLeft + (i - 1) * chartStep, y)
        GUI:setVisible(dotWidgets[i], true)
    end
end)

for i, dot in ipairs(dotWidgets) do
    GUI:addOnClickEvent(dot, function()
        local rec = dayRecords[i]
        if rec ~= nil then
            GUI:setText(tipLabel, os.date("%m-%d", rec.ts) .. " 均价" .. rec.price .. " 成交" .. rec.cnt .. "笔")
            GUI:setVisible(tipLabel, true)
        end
    end)
end