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58 package sample.blocks.stream.graph;
59
60 import java.awt.Color  ;
61 import java.awt.Graphics2D ;
62 import java.awt.image.BufferedImage ;
63 import java.io.DataInputStream ;
64 import java.io.IOException ;
65 import java.util.LinkedList ;
66
67 import javax.swing.ImageIcon ;
68 import javax.swing.JFrame ;
69 import javax.swing.JLabel ;
70
71 import org.mr.api.blocks.MantaInputStream;
72 import org.mr.api.blocks.MantaOutputStream;
73
74
75 public class GraphViewer {
76 private JFrame app ;
77
78 private BufferedImage onscreenImage;
79 private Graphics2D onscreen;
80 private Color background = Color.WHITE;
81 private Color graphColor = Color.BLACK;
82 private int appHight = 200;
83 private int appWidth = 500;
84 private int graphHight = appHight/2;
85 private int graphwidth = appWidth;
86 private LinkedList data;
87
88 public void init() throws IOException {
89 app =new JFrame ("GraphViewer");
91 app.setBounds(10,10,appWidth,appHight);
92 onscreenImage = new BufferedImage (appWidth, appHight, BufferedImage.TYPE_INT_RGB);
93 onscreen = (Graphics2D ) onscreenImage.getGraphics();
94 clear();
95 onscreen.setColor(graphColor);
96 ImageIcon icon = new ImageIcon (onscreenImage);
97 app.setContentPane(new JLabel (icon));
98 app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
99 app.setVisible(true);
100
101 data=new LinkedList ();
103 for (int i = 0; i < graphwidth; i++) {
104 data.addLast(new Integer (0));
105 }
106
107 drawData();
109
110 try {
112 Thread.sleep(2000);
113 } catch (InterruptedException e) {
114 e.printStackTrace();
116 }
117
118 MantaInputStream in = new MantaInputStream();
119 in.connect("graph", MantaOutputStream.TOPIC);
120 DataInputStream dis = new DataInputStream (in);
121 int input =0;
122 boolean go = true;
123 while(go){
124 try{
125 input=dis.readInt();
126 }catch(IOException e){
127 e.printStackTrace();
128 go =false;
129 }
130 updateGraph(input);
131
132 }
133 System.out.println("done");
134
135 }
137 public void updateGraph(int newPointValue){
138 data.addLast(new Integer (newPointValue));
139 data.removeFirst();
140 drawData();
141 }
142
143 public void drawData(){
144 clear();
145 onscreen.setColor(graphColor);
146 for (int i = 0; i < data.size(); i++) {
147 int dataVal =((Integer )data.get(i)).intValue();
148 onscreen.drawRect(i,graphHight-dataVal,1,1);
149 }
150 app.repaint();
151 }
152
153 public void clear(){
154 onscreen.setColor(background);
155 onscreen.fillRect(0,0,500,500);
156 app.repaint();
157 }
158
159 public static void main(String [] args) throws IOException {
160 GraphViewer view = new GraphViewer();
161 view.init();
162 }}
164 |
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