財務報表在金融領域應用廣泛，而證券交易等實時變更的金融信息則需要用財務圖表以圖形化的方式進行展示。今天跟大家演示如何用Web圖表控件ChartDirector創建一個功能完整的財務圖表，這個圖表由HLOC、流動平均線、Bollinger band, volume bars, RSI和動能指標組成。如圖所示：

主要步驟：

在本例中引用了FinanceChart庫的插件，這樣創建一個復雜的財務圖表會相對容易一些。主要有以下幾個步驟：

• 創建一個新的FinanceChart對象
• 用FinanceChart.setData設置圖表的數據
• 用 FinanceChart.addMainChart添加主要的圖表
• 用FinanceChart.addSimpleMovingAvg向主表中添加比較簡單的流動平均線
• 用FinanceChart.addHLOC向主表中添加HLOC符號
• 用FinanceChart.addBollingerBand在主表中添加Bollinger Band
• 用FinanceChart.addVolBars向圖表中添加volume bars
• 用FinanceChart.addRSI添加一個RSI指示器
• 用FinanceChart.addMomentum添加一個Momentum指示器

簡單起見，這個圖表沒有連接到數據庫，而用RanTable對象模擬數據庫。PS：RanTable是一個ChartDirector工具類，可用隨機數創建表格。

ChartDirector創建財務圖表示例代碼：

#include "FinanceChart.h"

int main(int argc, char *argv[])
{
    // Create a finance chart demo containing 100 days of data
    int noOfDays = 100;

    // To compute moving averages starting from the first day, we need to get extra
    // data points before the first day
    int extraDays = 30;

    // In this exammple, we use a random number generator utility to simulate the
    // data. We set up the random table to create 6 cols x (noOfDays + extraDays)
    // rows, using 9 as the seed.
    RanTable *rantable = new RanTable(9, 6, noOfDays + extraDays);

    // Set the 1st col to be the timeStamp, starting from Sep 4, 2002, with each row
    // representing one day, and counting week days only (jump over Sat and Sun)
    rantable->setDateCol(0, Chart::chartTime(2002, 9, 4), 86400, true);

    // Set the 2nd, 3rd, 4th and 5th columns to be high, low, open and close data.
    // The open value starts from 100, and the daily change is random from -5 to 5.
    rantable->setHLOCCols(1, 100, -5, 5);

    // Set the 6th column as the vol data from 5 to 25 million
    rantable->setCol(5, 50000000, 250000000);

    // Now we read the data from the table into arrays
    DoubleArray timeStamps = rantable->getCol(0);
    DoubleArray highData = rantable->getCol(1);
    DoubleArray lowData = rantable->getCol(2);
    DoubleArray openData = rantable->getCol(3);
    DoubleArray closeData = rantable->getCol(4);
    DoubleArray volData = rantable->getCol(5);

    // Create a FinanceChart object of width 640 pixels
    FinanceChart *c = new FinanceChart(640);

    // Add a title to the chart
    c->addTitle("Finance Chart Demonstration");

    // Set the data into the finance chart object
    c->setData(timeStamps, highData, lowData, openData, closeData, volData, extraDays
        );

    // Add the main chart with 240 pixels in height
    c->addMainChart(240);

    // Add a 5 period simple moving average to the main chart, using brown color
    c->addSimpleMovingAvg(5, 0x663300);

    // Add a 20 period simple moving average to the main chart, using purple color
    c->addSimpleMovingAvg(20, 0x9900ff);

    // Add HLOC symbols to the main chart, using green/red for up/down days
    c->addHLOC(0x008000, 0xcc0000);

    // Add 20 days bollinger band to the main chart, using light blue (9999ff) as the
    // border and semi-transparent blue (c06666ff) as the fill color
    c->addBollingerBand(20, 2, 0x9999ff, 0xc06666ff);

    // Add a 75 pixels volume bars sub-chart to the bottom of the main chart, using
    // green/red/grey for up/down/flat days
    c->addVolBars(75, 0x99ff99, 0xff9999, 0x808080);

    // Append a 14-days RSI indicator chart (75 pixels high) after the main chart.
    // The main RSI line is purple (800080). Set threshold region to +/- 20 (that is,
    // RSI = 50 +/- 25). The upper/lower threshold regions will be filled with red
    // (ff0000)/blue (0000ff).
    c->addRSI(75, 14, 0x800080, 20, 0xff0000, 0x0000ff);

    // Append a 12-days momentum indicator chart (75 pixels high) using blue (0000ff)
    // color.
    c->addMomentum(75, 12, 0x0000ff);

    // Output the chart
    c->makeChart("finance.png");

    //free up resources
    delete rantable;
    delete c;
    return 0;
}