大多数金融图表库使用一些规则来着色蜡烛:
>如果关闭> =打开,则蜡烛是空心的(未填充)
>如果关闭 >如果先前关闭< =关闭,则蜡烛为绿色
>如果先前关闭>关闭,然后蜡烛是红色的
jFreeChart似乎有自己的着色规则,可以改变它们.默认情况下,图表看起来像这样(某些颜色已更改):
如你所见,可以改变蜡烛,背景,情节边界等的颜色.
我想在图表中实施规则1和2(上面).可能吗?
结果应该是这样的:
这是我在示例中使用的当前CandlestickRenderer:
public class CandlestickRenderer extends org.jfree.chart.renderer.xy.CandlestickRenderer {
public CandlestickRenderer() {
setDrawVolume(false);
}
@Override
public Paint getItemPaint(int series, int item) {
OHLCDataset highLowData = (OHLCDataset)getPlot().getDataset(series);
Number curClose = highLowData.getClose(series, item);
Number prevClose = highLowData.getClose(series, item>0 ? item-1 : 0);
if (prevClose.doubleValue() <= curClose.doubleValue()) {
return getUpPaint();
}
else {
return getDownPaint();
}
}
}
更新1
似乎可以通过将油漆设置为黑色并使用颜色不改变项目裤来完成.
public class CandlestickRenderer extends org.jfree.chart.renderer.xy.CandlestickRenderer {
public CandlestickRenderer() {
setDrawVolume(false);
setUseOutlinePaint(false);
setUpPaint(Color.BLACK); // <-- rule 1. (plot is also black so it looks not filled)
}
@Override
public Paint getItemPaint(int series, int item) {
OHLCDataset highLowData = (OHLCDataset) getPlot().getDataset(series);
Number curClose = highLowData.getClose(series, item);
Number prevClose = highLowData.getClose(series, item>0 ? item-1 : 0);
if (prevClose.doubleValue() <= curClose.doubleValue()) {
return Color.GREEN; // <-- rule 3.
} else {
return Color.RED; // <-- rule 4.
}
}
}
但主要问题持续:
>根据jFreeChart,down(downPaint)和up(upPaint)是什么意思?它比较上一个.收盘价与收盘价相比还是开盘价与收盘价相比
>在jFreeChart的源代码中,我可以找到upPaint& amp;使用downPaint?
现在这是一个奇怪的结果:
最佳答案 我做到了这是完整的渲染器:
public class CandlestickRenderer extends org.jfree.chart.renderer.xy.CandlestickRenderer {
private final Paint colorRaising = Color.GREEN;
private final Paint colorFalling = Color.RED;
private final Paint colorUnknown = Color.GRAY;
private final Paint colorTransparent = Color.BLACK;
public CandlestickRenderer() {
setDrawVolume(false);
setUpPaint(colorUnknown); // use unknown color if error
setDownPaint(colorUnknown); // use unknown color if error
}
@Override
public Paint getItemPaint(int series, int item) {
OHLCDataset highLowData = (OHLCDataset) getPlot().getDataset(series);
Number curClose = highLowData.getClose(series, item);
Number prevClose = highLowData.getClose(series, item>0 ? item-1 : 0);
if (prevClose.doubleValue() <= curClose.doubleValue()) {
return Color.GREEN;
} else {
return Color.RED;
}
}
@Override
public void drawItem(Graphics2D g2, XYItemRendererState state,
Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot,
ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset,
int series, int item, CrosshairState crosshairState, int pass) {
OHLCDataset highLowData = (OHLCDataset) dataset;
double yOpen = highLowData.getOpenValue(series, item);
double yClose = highLowData.getCloseValue(series, item);
// set color for filled candle
if (yClose >= yOpen) {
setUpPaint(colorRaising);
setDownPaint(colorFalling);
}
// set color for hollow (not filled) candle
else {
setUpPaint(colorTransparent);
setDownPaint(colorTransparent);
}
// call parent method
super.drawItem(g2, state, dataArea, info, plot, domainAxis, rangeAxis, dataset, series, item, crosshairState, pass);
}
}
结果图表:
如果您需要所有示例代码,请随时与我联系.