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Java > Open Source Codes > org > jfree > experimental > chart > demo > DialDemo4


1 /* --------------
2  * DialDemo4.java
3  * --------------
4  * (C) Copyright 2006, by Object Refinery Limited.
5  */
6
7 package org.jfree.experimental.chart.demo;
8
9 import java.awt.BasicStroke JavaDoc;
10 import java.awt.BorderLayout JavaDoc;
11 import java.awt.Color JavaDoc;
12 import java.awt.Dimension JavaDoc;
13 import java.awt.Font JavaDoc;
14 import java.awt.GradientPaint JavaDoc;
15 import java.awt.Point JavaDoc;
16
17 import javax.swing.JFrame JavaDoc;
18 import javax.swing.JPanel JavaDoc;
19 import javax.swing.JSlider JavaDoc;
20 import javax.swing.event.ChangeEvent JavaDoc;
21 import javax.swing.event.ChangeListener JavaDoc;
22
23 import org.jfree.chart.ChartPanel;
24 import org.jfree.chart.JFreeChart;
25 import org.jfree.data.general.DefaultValueDataset;
26 import org.jfree.experimental.chart.plot.dial.DialBackground;
27 import org.jfree.experimental.chart.plot.dial.DialPlot;
28 import org.jfree.experimental.chart.plot.dial.DialPointer;
29 import org.jfree.experimental.chart.plot.dial.StandardDialFrame;
30 import org.jfree.experimental.chart.plot.dial.StandardDialScale;
31 import org.jfree.ui.GradientPaintTransformType;
32 import org.jfree.ui.StandardGradientPaintTransformer;
33
34 /**
35  * A sample application showing the use of a {@link DialPlot}.
36  */
37 public class DialDemo4 extends JFrame JavaDoc implements ChangeListener JavaDoc {
38     
39     /** A slider to update the dataset value. */
40     JSlider JavaDoc slider;
41     
42     /** The dataset. */
43     DefaultValueDataset dataset;
44     
45     /**
46      * Creates a new instance.
47      *
48      * @param title the frame title.
49      */
50     public DialDemo4(String JavaDoc title) {
51         super(title);
52         
53         this.dataset = new DefaultValueDataset(50);
54         // get data for diagrams
55 DialPlot plot = new DialPlot();
56         plot.setView(0.78, 0.37, 0.22, 0.26);
57         plot.setDataset(this.dataset);
58         
59         StandardDialFrame dialFrame = new StandardDialFrame(-10.0, 20.0);
60         dialFrame.setInnerRadius(0.70);
61         dialFrame.setOuterRadius(0.90);
62         dialFrame.setForegroundPaint(Color.darkGray);
63         dialFrame.setStroke(new BasicStroke JavaDoc(3.0f));
64         plot.setDialFrame(dialFrame);
65         
66         GradientPaint JavaDoc gp = new GradientPaint JavaDoc(new Point JavaDoc(),
67                 new Color JavaDoc(255, 255, 255), new Point JavaDoc(),
68                 new Color JavaDoc(240, 240, 240));
69         DialBackground sdb = new DialBackground(gp);
70         sdb.setGradientPaintTransformer(new StandardGradientPaintTransformer(
71                 GradientPaintTransformType.VERTICAL));
72         plot.addLayer(sdb);
73         
74         StandardDialScale scale = new StandardDialScale(0, 100, -8, 16.0);
75         scale.setTickRadius(0.82);
76         scale.setTickLabelOffset(-0.04);
77         scale.setMajorTickIncrement(25.0);
78         scale.setTickLabelFont(new Font JavaDoc("Dialog", Font.PLAIN, 14));
79         
80         plot.addScale(0, scale);
81         
82         DialPointer needle = new DialPointer.Pin();
83         needle.setRadius(0.84);
84         plot.addLayer(needle);
85         JFreeChart chart1 = new JFreeChart(plot);
86         chart1.setTitle("Dial Demo 4");
87         ChartPanel cp1 = new ChartPanel(chart1);
88
89         cp1.setPreferredSize(new Dimension JavaDoc(400, 250));
90         slider = new JSlider JavaDoc(0, 100);
91         slider.setMajorTickSpacing(10);
92         slider.setPaintLabels(true);
93         slider.addChangeListener(this);
94         JPanel JavaDoc content = new JPanel JavaDoc(new BorderLayout JavaDoc());
95         content.add(cp1);
96         content.add(slider, BorderLayout.SOUTH);
97         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
98         setContentPane(content);
99
100     }
101     
102     /**
103      * Handle a change in the slider by updating the dataset value. This
104      * automatically triggers a chart repaint.
105      *
106      * @param e the event.
107      */
108     public void stateChanged(ChangeEvent JavaDoc e) {
109         this.dataset.setValue(new Integer JavaDoc(slider.getValue()));
110     }
111
112     /**
113      * Starting point for the demo application.
114      *
115      * @param args ignored.
116      */
117     public static void main(String JavaDoc[] args) {
118
119         DialDemo4 app = new DialDemo4("JFreeChart - Demo Dial 4");
120         app.pack();
121         app.setVisible(true);
122
123     }
124 }
125
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