问题描述
在我的JFreeChart时间序列图中,我发现图形线条很薄,可以准确地看到颜色。另一篇文章[]
建议覆盖渲染器方法,如下所示:
In my JFreeChart timeseries plots I find the legends lines to thin to see the colour accurately. Another post [ jfreechart - change sample of colors in legend ]suggested overriding a renderer method as follows:
renderer = new XYLineAndShapeRenderer()
{
private static final long serialVersionUID = 1L;
public Shape lookupLegendShape(int series)
{
return new Rectangle(15, 15);
}
};
这种方法可行,直到你做我做的事情
this approach works fine until you do what I did
renderer.setSeriesShapesVisible(i, false);
一旦我这样做,传奇就会恢复到一条线。有没有办法解决这个问题?
Once I did that the legend reverts back to a line. Is there any way round this?
我采用的解决方案接近TrashGod建议的解决方案我覆盖了getLegendItem()方法,迫使图例形状到所需的框。
The solution I adopted is close to that suggested by TrashGod I overrode the getLegendItem() method, forcing the legend shape to the desired box.
renderer = new XYLineAndShapeRenderer()
{
private static final long serialVersionUID = 1L;
public LegendItem getLegendItem(int datasetIndex, int series)
{
LegendItem legend = super.getLegendItem(datasetIndex, series);
return new LegendItem(legend.getLabel(), legend.getDescription(), legend.getToolTipText(), legend.getURLText(), Plot.DEFAULT_LEGEND_ITEM_BOX, legend.getFillPaint());
}
};
推荐答案
你将不得不重写 getLegendItem()
获取 LegendItem
,而不是渲染器创建的那个。
You're going to have to override getLegendItem()
to get the LegendItem
you want in place of the one the renderer creates.
附录:这是一个简单的例子,可以帮助你入门。
Addendum: Here's a simple example that should help you get started.
XYPlot plot = (XYPlot) chart.getPlot();
plot.setRenderer(new MyRenderer());
...
private static class MyRenderer extends XYLineAndShapeRenderer {
@Override
public LegendItem getLegendItem(int dataset, int series) {
LegendItem legendItem = super.getLegendItem(dataset, series);
System.out.println(dataset + " " + series + " " + legendItem.getShape());
// modify legendItem here
return legendItem;
}
}
这篇关于JFreeChart图例显示的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!