如何使用jFreeChart确定StackedBarChart中ItemMargin属性的最小值和最大值 [英] How to determine min and max value for ItemMargin property in StackedBarChart using jFreeChart
本文介绍了如何使用jFreeChart确定StackedBarChart中ItemMargin属性的最小值和最大值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我使用jFreeChart api制作一个应用程序，使得在滑块移动时，两个条之间的间隙宽度根据滑块的值增加或减少。但我发现不同的图表和不同的数据项边距属性变化。
为了证明问题，我附上以下代码： -
I am using jFreeChart api to make one application such that on movement of slider the gap width in between the two bars gets increased or decreased according to the value of the slider. But I found with different charts and different data item margin property get varied.
To demonstrate the problem I am attaching the following code:-
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.SubCategoryAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.GroupedStackedBarRenderer;
import org.jfree.data.KeyToGroupMap;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
public class DomainTranslateDemo extends ApplicationFrame {
private static class DemoPanel extends JPanel implements ChangeListener {
private static int SLIDER_INITIAL_VALUE = 50;
private JSlider slider;
private DateAxis domainAxis;
private int lastValue = SLIDER_INITIAL_VALUE;
private GroupedStackedBarRenderer renderer;
// one month (milliseconds, seconds, minutes, hours, days)
private int delta = 1000 * 60 * 60 * 24 * 30;
public DemoPanel() {
super(new BorderLayout());
final CategoryDataset dataset = createDataset();
final JFreeChart chart = createChart(dataset);
final ChartPanel chartPanel = new ChartPanel(chart);
Dimension Dim = new Dimension(590, 350);
chartPanel.setPreferredSize(Dim);
add(chartPanel);
JPanel dashboard = new JPanel(new BorderLayout());
dashboard.setBorder(BorderFactory.createEmptyBorder(0, 4, 4, 4));
this.slider = new JSlider(0, 100, SLIDER_INITIAL_VALUE);
this.slider.addChangeListener(this);
dashboard.add(this.slider);
add(dashboard, BorderLayout.SOUTH);
}
private CategoryDataset createDataset() {
DefaultCategoryDataset result = new DefaultCategoryDataset();
result.addValue(1.5, "5YEUR", "5Y");
result.addValue(-1.5, "5YUSD", "5Y");
result.addValue(0.5, "5Yx5YEUR", "5Yx5Y");
result.addValue(-0.5, "5Yx5YUSD", "5Yx5Y");
result.addValue(1.5, "10Yx5YEUR", "10Yx5Y");
result.addValue(-1.5, "10Yx5YUSD", "10Yx5Y");
result.addValue(1.5, "15Yx5YEUR", "15Yx5Y");
result.addValue(-1.5, "15Yx5YUSD", "15Yx5Y");
result.addValue(1.5, "20Yx5YEUR", "20Yx5Y");
result.addValue(-1.5, "20Yx5YUSD", "20Yx5Y");
result.addValue(1.5, "20Yx5YEUR", "25Yx5Y");
result.addValue(-1.5, "20Yx5YUSD", "25Yx5Y");
//result.addValue(11.9, "Product 3 (US)", "Jan 04");
return result;
}
private JFreeChart createChart(final CategoryDataset dataset) {
final JFreeChart chart = ChartFactory.createStackedBarChart(
"Max Bar Width", // chart title
"Category", // domain axis label
"Value", // range axis label
dataset, // data
PlotOrientation.VERTICAL, // the plot orientation
true, // legend
true, // tooltips
false // urls
);
renderer = new GroupedStackedBarRenderer();
KeyToGroupMap map = new KeyToGroupMap("G1");
map.mapKeyToGroup("5YEUR", "G1");
map.mapKeyToGroup("5YUSD", "G1");
map.mapKeyToGroup("5Yx5YEUR", "G2");
map.mapKeyToGroup("5Yx5YUSD", "G2");
map.mapKeyToGroup("10Yx5YEUR", "G3");
map.mapKeyToGroup("10Yx5YUSD", "G3");
map.mapKeyToGroup("15Yx5YEUR", "G4");
map.mapKeyToGroup("15Yx5YUSD", "G4");
map.mapKeyToGroup("20Yx5YEUR", "G5");
map.mapKeyToGroup("20Yx5YUSD", "G5");
map.mapKeyToGroup("25Yx5YEUR", "G6");
map.mapKeyToGroup("25Yx5YUSD", "G6");
renderer.setSeriesToGroupMap(map);
double maxBarWidth = renderer.getMaximumBarWidth();
//renderer.setMaximumBarWidth(1);
renderer.setItemMargin(-20);
/* SubCategoryAxis domainAxis = new SubCategoryAxis("Product / Month");
domainAxis.setCategoryMargin(0.05);
domainAxis.addSubCategory("Product 1");
domainAxis.addSubCategory("Product 2");
domainAxis.addSubCategory("Product 3");*/
CategoryPlot plot = (CategoryPlot) chart.getPlot();
//plot.setDomainAxis(domainAxis);
plot.setRenderer(renderer);
plot.setFixedLegendItems(createLegendItems());
return chart;
}
/**
* @return The legend items.
*/
private LegendItemCollection createLegendItems() {
LegendItemCollection result = new LegendItemCollection();
return result;
}
@Override
public void stateChanged(ChangeEvent event) {
int value = this.slider.getValue();
/* long minimum = domainAxis.getMinimumDate().getTime();
long maximum = domainAxis.getMaximumDate().getTime();
if (value<lastValue) { // left
minimum = minimum - delta;
maximum = maximum - delta;
} else { // right
minimum = minimum + delta;
maximum = maximum + delta;
}
DateRange range = new DateRange(minimum,maximum);
domainAxis.setRange(range);*/
System.out.println("value:"+value);
renderer.setItemMargin(value/100.0);
}
}
public DomainTranslateDemo(String title) {
super(title);
setContentPane(new DemoPanel());
}
public static JPanel createDemoPanel() {
return new DemoPanel();
}
public static void main(String[] args) {
DomainTranslateDemo demo = new DomainTranslateDemo("Translate Demo");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}
从上面的代码很明显，两个柱子在
滑块值= 0时没有相互接触。同样在100％之前我的柱子消失了。
我需要一个应用程序，其中
From the above code It is evident that the two bars are not touching each other on slider value = 0. Similarly before 100% my bar is getting disappeared. I need one application in which
关于滑块的最小值=所有条形需要相互接触
on min value of slider = all the bars need to touch each other
on slider的最大值=它将显示条之间的最大距离。
on max value of slider = It will show max distance in between the bars.
这将取决于项目边距属性的最小值和最大值。
我搜索了几个与此相关的文档但没有找到任何令人信服的计算。
This will all depend on the min and max value of item margin property. I searched several docs related with this didn't find any convincing calculation on this.
这方面的任何建议都会非常有用。
Any kind of suggestion in this regard would be really helpful.
谢谢
推荐答案
我认为你只需要使用更多的负数范围，例如 -50,10 。
I think you just need to use more of the negative range, e.g. -50, 10.
SSCCE：
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.BorderFactory;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.GroupedStackedBarRenderer;
import org.jfree.data.KeyToGroupMap;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/** @see http://stackoverflow.com/a/17342522/230513 */
public class DomainTranslateDemo extends ApplicationFrame {
private static class DemoPanel extends JPanel implements ChangeListener {
private static int SLIDER_INITIAL_VALUE = -42;
private static final double INCREMENT = 1 / 10.0;
private JSlider slider;
private GroupedStackedBarRenderer renderer;
public DemoPanel() {
super(new BorderLayout());
final CategoryDataset dataset = createDataset();
final JFreeChart chart = createChart(dataset);
final ChartPanel chartPanel = new ChartPanel(chart);
Dimension Dim = new Dimension(590, 350);
chartPanel.setPreferredSize(Dim);
add(chartPanel);
JPanel dashboard = new JPanel(new BorderLayout());
dashboard.setBorder(BorderFactory.createEmptyBorder(0, 4, 4, 4));
this.slider = new JSlider(-50, 10, SLIDER_INITIAL_VALUE);
this.slider.addChangeListener(this);
dashboard.add(this.slider);
add(dashboard, BorderLayout.SOUTH);
}
private CategoryDataset createDataset() {
DefaultCategoryDataset result = new DefaultCategoryDataset();
result.addValue(1.5, "5YEUR", "5Y");
result.addValue(-1.5, "5YUSD", "5Y");
result.addValue(0.5, "5Yx5YEUR", "5Yx5Y");
result.addValue(-0.5, "5Yx5YUSD", "5Yx5Y");
result.addValue(1.5, "10Yx5YEUR", "10Yx5Y");
result.addValue(-1.5, "10Yx5YUSD", "10Yx5Y");
result.addValue(1.5, "15Yx5YEUR", "15Yx5Y");
result.addValue(-1.5, "15Yx5YUSD", "15Yx5Y");
result.addValue(1.5, "20Yx5YEUR", "20Yx5Y");
result.addValue(-1.5, "20Yx5YUSD", "20Yx5Y");
result.addValue(1.5, "20Yx5YEUR", "25Yx5Y");
result.addValue(-1.5, "20Yx5YUSD", "25Yx5Y");
return result;
}
private JFreeChart createChart(final CategoryDataset dataset) {
final JFreeChart chart = ChartFactory.createStackedBarChart(
"Max Bar Width", // chart title
"Category", // domain axis label
"Value", // range axis label
dataset, // data
PlotOrientation.VERTICAL, // the plot orientation
true, // legend
true, // tooltips
false // urls
);
renderer = new GroupedStackedBarRenderer();
KeyToGroupMap map = new KeyToGroupMap("G1");
map.mapKeyToGroup("5YEUR", "G1");
map.mapKeyToGroup("5YUSD", "G1");
map.mapKeyToGroup("5Yx5YEUR", "G2");
map.mapKeyToGroup("5Yx5YUSD", "G2");
map.mapKeyToGroup("10Yx5YEUR", "G3");
map.mapKeyToGroup("10Yx5YUSD", "G3");
map.mapKeyToGroup("15Yx5YEUR", "G4");
map.mapKeyToGroup("15Yx5YUSD", "G4");
map.mapKeyToGroup("20Yx5YEUR", "G5");
map.mapKeyToGroup("20Yx5YUSD", "G5");
map.mapKeyToGroup("25Yx5YEUR", "G6");
map.mapKeyToGroup("25Yx5YUSD", "G6");
renderer.setSeriesToGroupMap(map);
double maxBarWidth = renderer.getMaximumBarWidth();
renderer.setItemMargin(SLIDER_INITIAL_VALUE * INCREMENT);
CategoryPlot plot = (CategoryPlot) chart.getPlot();
plot.setRenderer(renderer);
plot.setFixedLegendItems(createLegendItems());
return chart;
}
private LegendItemCollection createLegendItems() {
LegendItemCollection result = new LegendItemCollection();
return result;
}
@Override
public void stateChanged(ChangeEvent event) {
int value = slider.getValue();
System.out.println("value:" + value);
renderer.setItemMargin(value * INCREMENT);
}
}
public DomainTranslateDemo(String title) {
super(title);
setContentPane(new DemoPanel());
}
public static JPanel createDemoPanel() {
return new DemoPanel();
}
public static void main(String[] args) {
DomainTranslateDemo demo = new DomainTranslateDemo("Translate Demo");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}
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