QCustomPlot之K线图(十七)

效果图

K线图需要引入的类:QCPFinancial,首先来看下K线图的示意图:

K线图示意图

其中阳线在中国一般使用红色表示,阴线使用绿色表示

K线图的数据结构

QCPFinancialDataQCPFinancial所使用的数据结构,包含五个数据类型,如下所示:

数据 含义
key key轴坐标
open 开盘
close 关盘
low 最低
high 最高

K线图的风格

函数 含义
setChartStyle csOhlc(美国线)
csCandlestick(蜡烛图)
setWidth wtAbsolute(像素)
wtAxisRectRatio(轴矩形比例)
wtPlotCoords(坐标轴,默认)
setTwoColored 是否显示两种颜色,即阳线和阴线可以有各自的颜色
setBrushPositive 阳线画刷
setBrushNegative 阴线画刷
setPenPositive 阳线画笔
setPenNegative 阴线画笔

timeSeriesToOhlc函数

如果数据仅有一系列值(例如价格与时间)可用,则可以使用静态函数timeSeriesToOhlc生成合并的OHLC数据,然后将其传递给setData函数

参数 含义
time 时间
value
timeBinSize 时间间隔大小,一般是一天(3600*24)
timeBinOffset 时间起始,一般传入time[0]

完整示例

来源:echarts

class MyAxisTickerText : public QCPAxisTickerText
{
protected:
    virtual QVector<double> createTickVector(double tickStep, const QCPRange &range) Q_DECL_OVERRIDE
    {
        Q_UNUSED(tickStep)
        QVector<double> result;
        if (mTicks.isEmpty())
            return result;

        auto start = mTicks.lowerBound(range.lower);
        auto end = mTicks.upperBound(range.upper);
        if (start != mTicks.constBegin()) --start;
        if (end != mTicks.constEnd()) ++end;

        int count = cleanMantissa(std::distance(start, end) / double(mTickCount + 1e-10));

        auto it = start;
        while (it != end) {
            result.append(it.key());
            int step = count;
            if (step == 0) ++it;
            while (--step >= 0 && it != end)
                ++it;
        }

        return result;
    }
};

void MainWindow::setupShangHaiIndexDemo(QCustomPlot *customPlot)
{
    const QColor BrushPositive("#ec0000");
    const QColor PenPositive("#8a0000");
    const QColor BrushNegative("#00da3c");
    const QColor PenNegative("#008f28");

    const QVector<QString> rawTimes = {
        "2013/1/24", "2013/1/25", "2013/1/28", "2013/1/29", "2013/1/30", "2013/1/31", "2013/2/1", "2013/2/4", "2013/2/5",  "2013/2/6", "2013/2/7",
        "2013/2/8",  "2013/2/18", "2013/2/19", "2013/2/20", "2013/2/21", "2013/2/22", "2013/2/25", "2013/2/26", "2013/2/27", "2013/2/28", "2013/3/1",
        "2013/3/4",  "2013/3/5",  "2013/3/6",  "2013/3/7", "2013/3/8",  "2013/3/11", "2013/3/12", "2013/3/13", "2013/3/14", "2013/3/15", "2013/3/18",
        "2013/3/19", "2013/3/20", "2013/3/21", "2013/3/22", "2013/3/25", "2013/3/26", "2013/3/27", "2013/3/28", "2013/3/29", "2013/4/1", "2013/4/2",
        "2013/4/3",  "2013/4/8",  "2013/4/9",  "2013/4/10", "2013/4/11", "2013/4/12", "2013/4/15", "2013/4/16", "2013/4/17", "2013/4/18", "2013/4/19",
        "2013/4/22", "2013/4/23", "2013/4/24", "2013/4/25", "2013/4/26", "2013/5/2",  "2013/5/3",  "2013/5/6",  "2013/5/7",  "2013/5/8",  "2013/5/9",
        "2013/5/10", "2013/5/13", "2013/5/14", "2013/5/15", "2013/5/16", "2013/5/17", "2013/5/20", "2013/5/21", "2013/5/22", "2013/5/23", "2013/5/24",
        "2013/5/27", "2013/5/28", "2013/5/29", "2013/5/30", "2013/5/31", "2013/6/3",  "2013/6/4",  "2013/6/5",  "2013/6/6",  "2013/6/7",  "2013/6/13",
    };
    // 数据意义:开盘(open),收盘(close),最低(lowest),最高(highest)
    const QVector<QVector<double>> rawDatas = {
        { 2320.26,2320.26,2287.3,2362.94}, { 2300,2291.3,2288.26,2308.38}, { 2295.35,2346.5,2295.35,2346.92}, { 2347.22,2358.98,2337.35,2363.8},
        { 2360.75,2382.48,2347.89,2383.76}, { 2383.43,2385.42,2371.23,2391.82}, {2377.41,2419.02,2369.57,2421.15}, {2425.92,2428.15,2417.58,2440.38},
        {2411,2433.13,2403.3,2437.42}, {2432.68,2434.48,2427.7,2441.73}, {2430.69,2418.53,2394.22,2433.89}, {2416.62,2432.4,2414.4,2443.03},
        { 2441.91,2421.56,2415.43,2444.8}, { 2420.26,2382.91,2373.53,2427.07}, { 2383.49,2397.18,2370.61,2397.94}, { 2378.82,2325.95,2309.17,2378.82},
        { 2322.94,2314.16,2308.76,2330.88}, { 2320.62,2325.82,2315.01,2338.78}, { 2313.74,2293.34,2289.89,2340.71}, { 2297.77,2313.22,2292.03,2324.63},
        { 2322.32,2365.59,2308.92,2366.16}, {2364.54,2359.51,2330.86,2369.65}, {2332.08,2273.4,2259.25,2333.54}, {2274.81,2326.31,2270.1,2328.14},
        {2333.61,2347.18,2321.6,2351.44}, {2340.44,2324.29,2304.27,2352.02}, {2326.42,2318.61,2314.59,2333.67}, { 2314.68,2310.59,2296.58,2320.96},
        { 2309.16,2286.6,2264.83,2333.29}, { 2282.17,2263.97,2253.25,2286.33}, { 2255.77,2270.28,2253.31,2276.22}, { 2269.31,2278.4,2250,2312.08},
        { 2267.29,2240.02,2239.21,2276.05}, { 2244.26,2257.43,2232.02,2261.31}, { 2257.74,2317.37,2257.42,2317.86}, { 2318.21,2324.24,2311.6,2330.81},
        { 2321.4,2328.28,2314.97,2332}, { 2334.74,2326.72,2319.91,2344.89}, { 2318.58,2297.67,2281.12,2319.99}, { 2299.38,2301.26,2289,2323.48},
        { 2273.55,2236.3,2232.91,2273.55}, { 2238.49,2236.62,2228.81,2246.87}, {2229.46,2234.4,2227.31,2243.95}, {2234.9,2227.74,2220.44,2253.42},
        {2232.69,2225.29,2217.25,2241.34}, {2196.24,2211.59,2180.67,2212.59}, {2215.47,2225.77,2215.47,2234.73}, { 2224.93,2226.13,2212.56,2233.04},
        { 2236.98,2219.55,2217.26,2242.48}, { 2218.09,2206.78,2204.44,2226.26}, { 2199.91,2181.94,2177.39,2204.99}, { 2169.63,2194.85,2165.78,2196.43},
        { 2195.03,2193.8,2178.47,2197.51}, { 2181.82,2197.6,2175.44,2206.03}, { 2201.12,2244.64,2200.58,2250.11}, { 2236.4,2242.17,2232.26,2245.12},
        { 2242.62,2184.54,2182.81,2242.62}, { 2187.35,2218.32,2184.11,2226.12}, { 2213.19,2199.31,2191.85,2224.63}, { 2203.89,2177.91,2173.86,2210.58},
        {2170.78,2174.12,2161.14,2179.65}, {2179.05,2205.5,2179.05,2222.81}, {2212.5,2231.17,2212.5,2236.07}, {2227.86,2235.57,2219.44,2240.26},
        {2242.39,2246.3,2235.42,2255.21}, {2246.96,2232.97,2221.38,2247.86}, { 2228.82,2246.83,2225.81,2247.67},  { 2247.68,2241.92,2231.36,2250.85},
        { 2238.9,2217.01,2205.87,2239.93}, { 2217.09,2224.8,2213.58,2225.19}, { 2221.34,2251.81,2210.77,2252.87}, { 2249.81,2282.87,2248.41,2288.09},
        { 2286.33,2299.99,2281.9,2309.39},  { 2297.11,2305.11,2290.12,2305.3},  { 2303.75,2302.4,2292.43,2314.18}, { 2293.81,2275.67,2274.1,2304.95},
        { 2281.45,2288.53,2270.25,2292.59}, { 2286.66,2293.08,2283.94,2301.7}, { 2293.4,2321.32,2281.47,2322.1}, { 2323.54,2324.02,2321.17,2334.33},
        { 2316.25,2317.75,2310.49,2325.72}, { 2320.74,2300.59,2299.37,2325.53}, {2300.21,2299.25,2294.11,2313.43}, {2297.1,2272.42,2264.76,2297.1},
        {2270.71,2270.93,2260.87,2276.86}, {2264.43,2242.11,2240.07,2266.69}, {2242.26,2210.9,2205.07,2250.63}, { 2190.1,2148.35,2126.22,2190.1}
    };

    QSharedPointer<QCPAxisTickerText> textTicker(new MyAxisTickerText);     // 文字轴
    textTicker->setTickCount(10);
    QCPDataContainer<QCPFinancialData> datas;
    QVector<double> timeDatas, MA5Datas, MA10Datas, MA20Datas, MA30Datas;

    MA5Datas = calculateMA(rawDatas, 5);
    MA10Datas = calculateMA(rawDatas, 10);
    MA20Datas = calculateMA(rawDatas, 20);
    MA30Datas = calculateMA(rawDatas, 30);

    for (int i = 0; i < rawTimes.size(); ++i) {
        timeDatas.append(i);

        QCPFinancialData data;
        data.key = i;
        data.open = rawDatas.at(i).at(0);
        data.close = rawDatas.at(i).at(1);
        data.low = rawDatas.at(i).at(2);
        data.high = rawDatas.at(i).at(3);
        datas.add(data);

        textTicker->addTick(i, rawTimes.at(i));
    }
    

    QCPFinancial *financial = new QCPFinancial(customPlot->xAxis, customPlot->yAxis);
    financial->setName("日K");
    financial->setBrushPositive(BrushPositive);
    financial->setPenPositive(PenPositive);
    financial->setBrushNegative(BrushNegative);
    financial->setPenNegative(PenNegative);
    financial->data()->set(datas);

    const QVector<QColor> ColorOptions = {
        "#c23531", "#2f4554", "#61a0a8", "#d48265"
    };

    QCPGraph *graph = customPlot->addGraph();
    graph->setName("MA5");
    graph->setData(timeDatas, MA5Datas);
    graph->setPen(ColorOptions.at(0));
    graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QPen(ColorOptions.at(0), 2), QBrush(Qt::white), 8));
    graph->setSmooth(true);

    graph = customPlot->addGraph();
    graph->setName("MA10");
    graph->setData(timeDatas, MA10Datas);
    graph->setPen(ColorOptions.at(1));
    graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QPen(ColorOptions.at(1), 2), QBrush(Qt::white), 8));
    graph->setSmooth(true);

    graph = customPlot->addGraph();
    graph->setName("MA20");
    graph->setData(timeDatas, MA20Datas);
    graph->setPen(ColorOptions.at(2));
    graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QPen(ColorOptions.at(2), 2), QBrush(Qt::white), 8));
    graph->setSmooth(true);

    graph = customPlot->addGraph();
    graph->setName("MA30");
    graph->setData(timeDatas, MA30Datas);
    graph->setPen(ColorOptions.at(3));
    graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QPen(ColorOptions.at(3), 2), QBrush(Qt::white), 8));
    graph->setSmooth(true);

    customPlot->xAxis->setTicker(textTicker);
    customPlot->rescaleAxes();
    customPlot->xAxis->scaleRange(1.05, customPlot->xAxis->range().center());
    customPlot->yAxis->scaleRange(1.05, customPlot->yAxis->range().center());
    customPlot->legend->setVisible(true);
}

QVector<double> MainWindow::calculateMA(const QVector<QVector<double> > &v, int dayCount)
{
    auto func = [](double result, const QVector<double> &v2){
      return result + v2[1];
    };

    QVector<double> result;
    for (int i = 0; i < v.size(); ++i) {
        if (i < dayCount) {
            result.append(qQNaN());
        } else {
            double sum = std::accumulate(v.begin() + i - dayCount + 1, v.begin() + i + 1, 0.0, func);
            result.append(sum / dayCount);
        }
    }
    return result;
}

最后

  1. 不使用 QCPAxisTickerDateTime 作为轴标签,是因为数据的日期不是连续的,使用QCPAxisTickerDateTime会导致不连续的部分有间隔,如果需要使用QCPAxisTickerDateTime的话需要设置setTickOrigin为时间的第一个数据,不然的话会发生K线图与坐标轴对应不上的情况,同时还要设置K线图的宽度setWidth,例如一天的宽度financial->setWidth(3600 * 24 * 0.8),乘以0.8是为了稍微缩小一点
  2. 继承QCPAxisTickerText的原因是因为QCPAxisTickerText在数据比较多的时候轴标签会挤在一起,密密麻麻的不好看
©著作权归作者所有,转载或内容合作请联系作者
  • 序言:七十年代末,一起剥皮案震惊了整个滨河市,随后出现的几起案子,更是在滨河造成了极大的恐慌,老刑警刘岩,带你破解...
    沈念sama阅读 213,254评论 6 492
  • 序言:滨河连续发生了三起死亡事件,死亡现场离奇诡异,居然都是意外死亡,警方通过查阅死者的电脑和手机,发现死者居然都...
    沈念sama阅读 90,875评论 3 387
  • 文/潘晓璐 我一进店门,熙熙楼的掌柜王于贵愁眉苦脸地迎上来,“玉大人,你说我怎么就摊上这事。” “怎么了?”我有些...
    开封第一讲书人阅读 158,682评论 0 348
  • 文/不坏的土叔 我叫张陵,是天一观的道长。 经常有香客问我,道长,这世上最难降的妖魔是什么? 我笑而不...
    开封第一讲书人阅读 56,896评论 1 285
  • 正文 为了忘掉前任,我火速办了婚礼,结果婚礼上,老公的妹妹穿的比我还像新娘。我一直安慰自己,他们只是感情好,可当我...
    茶点故事阅读 66,015评论 6 385
  • 文/花漫 我一把揭开白布。 她就那样静静地躺着,像睡着了一般。 火红的嫁衣衬着肌肤如雪。 梳的纹丝不乱的头发上,一...
    开封第一讲书人阅读 50,152评论 1 291
  • 那天,我揣着相机与录音,去河边找鬼。 笑死,一个胖子当着我的面吹牛,可吹牛的内容都是我干的。 我是一名探鬼主播,决...
    沈念sama阅读 39,208评论 3 412
  • 文/苍兰香墨 我猛地睁开眼,长吁一口气:“原来是场噩梦啊……” “哼!你这毒妇竟也来了?” 一声冷哼从身侧响起,我...
    开封第一讲书人阅读 37,962评论 0 268
  • 序言:老挝万荣一对情侣失踪,失踪者是张志新(化名)和其女友刘颖,没想到半个月后,有当地人在树林里发现了一具尸体,经...
    沈念sama阅读 44,388评论 1 304
  • 正文 独居荒郊野岭守林人离奇死亡,尸身上长有42处带血的脓包…… 初始之章·张勋 以下内容为张勋视角 年9月15日...
    茶点故事阅读 36,700评论 2 327
  • 正文 我和宋清朗相恋三年,在试婚纱的时候发现自己被绿了。 大学时的朋友给我发了我未婚夫和他白月光在一起吃饭的照片。...
    茶点故事阅读 38,867评论 1 341
  • 序言:一个原本活蹦乱跳的男人离奇死亡,死状恐怖,灵堂内的尸体忽然破棺而出,到底是诈尸还是另有隐情,我是刑警宁泽,带...
    沈念sama阅读 34,551评论 4 335
  • 正文 年R本政府宣布,位于F岛的核电站,受9级特大地震影响,放射性物质发生泄漏。R本人自食恶果不足惜,却给世界环境...
    茶点故事阅读 40,186评论 3 317
  • 文/蒙蒙 一、第九天 我趴在偏房一处隐蔽的房顶上张望。 院中可真热闹,春花似锦、人声如沸。这庄子的主人今日做“春日...
    开封第一讲书人阅读 30,901评论 0 21
  • 文/苍兰香墨 我抬头看了看天上的太阳。三九已至,却和暖如春,着一层夹袄步出监牢的瞬间,已是汗流浃背。 一阵脚步声响...
    开封第一讲书人阅读 32,142评论 1 267
  • 我被黑心中介骗来泰国打工, 没想到刚下飞机就差点儿被人妖公主榨干…… 1. 我叫王不留,地道东北人。 一个月前我还...
    沈念sama阅读 46,689评论 2 362
  • 正文 我出身青楼,却偏偏与公主长得像,于是被迫代替她去往敌国和亲。 传闻我的和亲对象是个残疾皇子,可洞房花烛夜当晚...
    茶点故事阅读 43,757评论 2 351