import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.GradientPaint;

import java.awt.Graphics;

import java.awt.Point;

import javax.swing.JApplet;

import javax.swing.JPanel;

import javax.swing.JSlider;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

import org.jfree.chart.ChartPanel;

import org.jfree.chart.JFreeChart;

import org.jfree.data.general.DefaultValueDataset;

import org.jfree.experimental.chart.plot.dial.DialBackground;

import org.jfree.experimental.chart.plot.dial.DialCap;

import org.jfree.experimental.chart.plot.dial.DialPlot;

import org.jfree.experimental.chart.plot.dial.DialTextAnnotation;

import org.jfree.experimental.chart.plot.dial.DialValueIndicator;

import org.jfree.experimental.chart.plot.dial.SimpleDialFrame;

import org.jfree.experimental.chart.plot.dial.StandardDialRange;

import org.jfree.experimental.chart.plot.dial.StandardDialScale;

import org.jfree.ui.GradientPaintTransformType;

import org.jfree.ui.StandardGradientPaintTransformer;

public class DialApplet extends JApplet implements ChangeListener {

/**

*

*/

private static final long serialVersionUID = 6436654984397289399L;

private ChartPanel chartPanel = null;

private JFreeChart jfreechart = null;

private JPanel jpanel;

private JSlider slider;

private DefaultValueDataset dataset;

public void init() {

double startVal = Double.parseDouble(this.getParameter("start_value"));

double endVal = Double.parseDouble(this.getParameter("end_value"));

Container c = getContentPane();

jpanel = new JPanel();

c.setLayout(new BorderLayout());

//指针值

dataset = new DefaultValueDataset(Double.parseDouble(this.getParameter("point_value")));

DialPlot dialplot = new DialPlot();

dialplot.setView(0.0D, 0.0D, 1.0D, 1.0D);

dialplot.setDataset(dataset);

SimpleDialFrame. simpledialframe. = new SimpleDialFrame();

simpledialframe.setForegroundPaint(getColor(this.getParameter("line_f_color"),Color.darkGray));

simpledialframe.setBackgroundPaint(getColor(this.getParameter("line_bg_color"),Color.lightGray));

dialplot.setDialFrame(simpledialframe);

GradientPaint gradientpaint = new GradientPaint(new Point(),

getColor(this.getParameter("f_color"),new Color(255, 255, 255)),

new Point(),

getColor(this.getParameter("bg_color"),new Color(170,170,220)));

DialBackground dialbackground = new DialBackground(gradientpaint);

dialbackground.setGradientPaintTransformer(new StandardGradientPaintTransformer(GradientPaintTransformType.VERTICAL));

dialplot.setBackground(dialbackground);

//设置显示在表盘值标题

String valueTitle = this.getParameter("val_title");

DialTextAnnotation dialtextannotation = new DialTextAnnotation(valueTitle);

dialtextannotation.setFont(new Font("Dialog", 1, 14));

dialtextannotation.setRadius(0.69999999999999996D);

dialplot.addLayer(dialtextannotation);

DialValueIndicator dialvalueindicator = new DialValueIndicator(0, "c");

dialplot.addLayer(dialvalueindicator);

StandardDialScale standarddialscale = new StandardDialScale(startVal, endVal, -120D, -300D);

standarddialscale.setMajorTickIncrement(Integer.parseInt(this.getParameter("step_length")));

standarddialscale.setTickRadius(0.88D);

standarddialscale.setTickLabelOffset(0.14999999999999999D);

standarddialscale.setTickLabelFont(new Font("Dialog", 0, 14));

dialplot.addScale(0, standarddialscale);

//以下是默认分为三段类型值

double valueLine = (endVal - startVal) / 3.0;

StandardDialRange standarddialrange = new StandardDialRange(startVal + valueLine + valueLine, endVal, Color.red);

standarddialrange.setInnerRadius(0.52000000000000002D);

standarddialrange.setOuterRadius(0.55000000000000004D);

dialplot.addLayer(standarddialrange);

StandardDialRange standarddialrange1 = new StandardDialRange(startVal + valueLine, startVal + valueLine + valueLine, Color.orange);

standarddialrange1.setInnerRadius(0.52000000000000002D);

standarddialrange1.setOuterRadius(0.55000000000000004D);

dialplot.addLayer(standarddialrange1);

StandardDialRange standarddialrange2 = new StandardDialRange(startVal, startVal + valueLine, Color.green);

standarddialrange2.setInnerRadius(0.52000000000000002D);

standarddialrange2.setOuterRadius(0.55000000000000004D);

dialplot.addLayer(standarddialrange2);

org.jfree.experimental.chart.plot.dial.DialPointer.Pointer pointer = new org.jfree.experimental.chart.plot.dial.DialPointer.Pointer();

dialplot.addLayer(pointer);

DialCap dialcap = new DialCap();

dialcap.setRadius(0.10000000000000001D);

dialplot.setCap(dialcap);

//通过参数设置仪表盘标题

String title = this.getParameter("chart_title");

jfreechart = new JFreeChart(dialplot);

//new Color(218,242,243)

//仪表盘方框的颜色

jfreechart.setBackgroundPaint(new Color(218,242,243));

jfreechart.setTitle(title);

chartPanel = new ChartPanel(jfreechart);

// chartPanel.setBackground(Color.blue);

chartPanel.setPreferredSize(new Dimension(130, 130));

slider = new JSlider((int)startVal,(int)endVal);

slider.setMajorTickSpacing(Integer.parseInt(this.getParameter("slider_step_length")));

slider.setPaintLabels(true);

slider.addChangeListener(this);

add(chartPanel);

add(slider, "South");

}

public void paint(Graphics g ) {

chartPanel.repaint();

jpanel.repaint();

slider.repaint();

}

public void stateChanged(ChangeEvent arg0) {

dataset.setValue(new Integer(slider.getValue()));

}

public double getVal(){

return dataset.getValue().doubleValue();

}

@Override

public void repaint() {

chartPanel.repaint();

jpanel.repaint();

slider.repaint();

}

private Color getColor(String colorStr,Color defaultColor){

Color color = defaultColor;

try {

colorStr = colorStr.trim();

if(colorStr.length() > 0){

colorStr = colorStr.substring(1);

}

color = new Color(Integer.parseInt(colorStr,16));

} catch (NumberFormatException e) {

e.printStackTrace();

}

return color;

}

@Override

public void destroy() {

// TODO Auto-generated method stub

super.destroy();

chartPanel = null;

jfreechart = null;

jpanel = null;

slider = null;

dataset = null;

}

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DialApplet