a moving graph sortof widget build using Swing

larryfulkerson

Hey everybody. I'm kinda new to the Java programming game and I just now found this site. It's cool. I come from a C++ background and I gotta say Java is easier to use but there's a steep learning curve in programming stuff in Swing. I decided to work with Swing components to learn more about swing and I've build some widgets that you guys might like to use. This first widget is a moving graph sort of widget and it comes as an eclipse project with three separate files.

This is the first file:

java code

package lgfGraph;

import javax.swing.*;
import java.awt.Color;
import java.awt.Dimension;
import lgfGraph.GraphPanel;

public class Graph {
	String version = "2007.06.15.0017";
	GraphPanel panel;
	
	public Graph() { /**/ }
		// change the value to be graphed using this update function
	public void update( int i ) { panel.newValue( i); }
	
		public void go() {
		/* uncomment this if you have the windows classic L&F installed	
			try {
				UIManager.setLookAndFeel(
				"com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel");
			} catch( Exception ignored ){ 
				System.out.println("Couldn't switch to windows Classic Look and Feel");
			}
		*/	
			    JFrame.setDefaultLookAndFeelDecorated(false);
			    JFrame frame = new JFrame("Graph Component Test version " + version );
			    Dimension dim = new Dimension( 508, 330 );
			    frame.setSize(dim);
			    frame.setMaximumSize(dim);
			    frame.setMinimumSize(dim);
			    frame.setPreferredSize(dim);
			    frame.setLocation( 100,100 );
			    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			    frame.setVisible(true);
			    frame.setLayout(null);
			    frame.setBackground(Color.black);
			    frame.setForeground(Color.black);
			    
			    panel = new GraphPanel();
			    frame.add(panel);
			    panel.setBackground(Color.black);
		} // close go()
		
	public static void main(String[] args) {
		// we're not invoking this in some kind of invokeLater function
		// because we don't have any text related components and we 
		// don't monkey with any components not on the EDT so....
		Graph g = new Graph();
		g.go();
		g.update(100);
		
		for( int i = 4; i  pointsAL;
	PlotPoints[] points;
	//ImageIcon II;
	//Image img;	 
	int zeroX		= 7;
	int zeroY		= 149;
	int zeroValueX  = 16;
	int zeroValueY  = 145;
	int intervalX	= 77;
	int intervalY   = 38;
	int maxValueY	= 120;
	int valueToPlot = 145;
	
	int secondsInGraphing = 0;
	int numberOfLinesToDraw = 0;
	
	Thread runThread;

	public void newValue(int i ) { valueToPlot = i; }
	
	public void run() {
		while( true) {
			try {
				Thread.sleep( 1000); // one update per second
			} catch( InterruptedException ie ){ /**/ }
			
			secondsInGraphing++;
			numberOfLinesToDraw++;
			if ( numberOfLinesToDraw > 5 ) numberOfLinesToDraw = 5;
		
			for ( int i = 5; i > 0; i-- ) {
				points[i].setValue( points[i - 1].gimmeValue());
			}
			points[0].setValue( valueToPlot);
			repaint();
		} // close while block
	}
	Dimension size = new Dimension( 500, 300 );
	
	public GraphPanel() {
		setSize( size );
		setPreferredSize(size);
		setMinimumSize( size);
		setMaximumSize( size);
		setLayout(null);
		pointsAL = new ArrayList();
		
		PlotPoints p = new PlotPoints( 401, 145, valueToPlot );
		pointsAL.add(p);
		p = new PlotPoints( 324, 145, valueToPlot );
		pointsAL.add(p);
		p = new PlotPoints( 247, 145, valueToPlot );
		pointsAL.add(p);
		p = new PlotPoints( 170, 145, valueToPlot );
		pointsAL.add(p);
		p = new PlotPoints( 93, 145, valueToPlot );
		pointsAL.add(p);
		p = new PlotPoints( 16, 145, valueToPlot );
		pointsAL.add(p);
		
		points = pointsAL.toArray( new PlotPoints[0] );
		
		runThread = new Thread( this );
		runThread.setDaemon(true);
		runThread.start();
	}
	
	public void drawTheBackground( Graphics g) {
		g.setColor(Color.black);
		g.fillRect(0, 0, size.width, size.height);
		g.setColor(Color.lightGray);
		// first the horizontal lines
		for( int i = 0; i  ( secondsInGraphing - i)) break;
		} // close for loop
	}
	
	public void paintComponent(Graphics g){
		Color oldColor;
		oldColor = g.getColor();

		drawTheBackground( g);
		
		g.setColor(Color.yellow );
		
		int index = 0;
		for( int i = 0; i  numberOfLinesToDraw ) break;
		} // close for loop
		
		g.drawString("valueToPlot=" + valueToPlot, 40, 40);
			// restore the old system color whatever it was:
		g.setColor(oldColor);
	}
} // close class GraphPanel

and here's the third of three files:

java code

package lgfGraph;

public class PlotPoints {
	int x;
	int y;
	int value;
	
	public PlotPoints( int X, int Y, int Value ) {
			x = X; y = Y; value = Value;
		}
	public void setValue( int i ) { value = i; }	
	public	int gimmeX() 	{ return x; }
	public	int gimmeY() 	{ return y; }
	public	int gimmeValue(){ return value; }
}