Create a object in form of circle, line, triangle or other shapes

Question

i am trying to make a program that creates simple objects, its just a hobby. the problem is i am trying to make an object that is only a line(for now). i mean i want to have an object that can be in a shape of anything in any angle. i like to be able to create a straight line from top left corner to bottom right corner, but i do not want to draw it, i want it to be an object like JButton but in different shapes. how ever i cannot do that. i have already wrote a little test program to show every one what i have, it s not my actual code just a sample.
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JLayeredPane;
import java.awt.BorderLayout;
import javax.swing.JLabel;
import java.awt.Color;
import javax.swing.event.MouseInputListener;
import java.awt.event.MouseEvent;
import javax.swing.JComponent;
import javax.swing.AbstractButton;
import java.awt.Graphics;
import java.awt.Dimension;
import java.awt.Polygon;
import java.awt.Graphics2D;
import java.awt.BasicStroke;
import java.awt.RenderingHints;
import java.awt.geom.Area;
public class FractalTest extends JFrame
     public static final int H=600;
     public static final int W=600;
     public static final Dimension dim = new Dimension(H,W);
     private int[] joinInt = new int[]{BasicStroke.JOIN_MITER,BasicStroke.JOIN_ROUND,BasicStroke.JOIN_BEVEL};
     private int[] capInt = new int[]{BasicStroke.CAP_BUTT,BasicStroke.CAP_ROUND,BasicStroke.CAP_SQUARE};
     public FractalTest(){
          super("Test");
                //two test lines
          Polygon p = new Polygon();
          p.addPoint(150,150);
          p.addPoint(450,450);
          Polygon s = new Polygon();
          s.addPoint(450,150);
          s.addPoint(150,450);
          setBackground(Color.YELLOW);
          setLayout(new BorderLayout());
                //status bar at buttom
          JLabel info = new JLabel("info");
                //creating JPanel holder of lines
          JPanelCanvas test = new JPanelCanvas();
          test.setBackground(Color.BLACK);
          test.setSize(dim);
          test.setLayout(new BorderLayout());
                //creating lines
          TestComponent t1 = new TestComponent(p,2f,"Polygon P");
          TestComponent t2 = new TestComponent(s,5f,"Polygon S");
                //setting JLables for status info
          t1.setInfoDisplay(info);
          t2.setInfoDisplay(info);
          test.setInfoDisplay(info);
          test.add(t1,BorderLayout.CENTER);
          test.add(t2,BorderLayout.CENTER);
          add(test,BorderLayout.CENTER);
          add(info,BorderLayout.SOUTH);
          setDefaultCloseOperation(EXIT_ON_CLOSE);
          setSize(dim);
          setVisible(true);
          repaint();
     public static void main(String[] args){new FractalTest();}
     private class TestComponent extends AbstractButton implements MouseInputListener
          private float thickness;
          private Polygon polygon;
          private String name=null;
          private JLabel jl=null;
          public TestComponent(Polygon p,float t,String name){
               super();
               thickness=t;
               polygon=p;
               setContentAreaFilled(false);
               this.name=name;
               setSize(FractalTest.dim);
               setVisible(true);
               addMouseListener(this);
          public void paint(Graphics g){
               super.paintComponent(g);
               Graphics2D g2 = (Graphics2D)g;
               g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
               g2.setStroke(new BasicStroke(thickness,capInt[0],joinInt[0]));
               g2.setPaint(Color.GREEN);
               g2.drawPolygon(polygon);
          public boolean contains(int x, int y){
               int Ax=polygon.xpoints[0];
               int Ay=polygon.ypoints[0];
               int Bx=polygon.xpoints[1];
               int By=polygon.ypoints[1];
               int m=(By-Ay)/(Bx-Ax);
               int s1=(m<=0)?+1:-1;
               int s2=(m<=0)?-1:+1;
               Polygon p = new Polygon();
               p.addPoint(Ax+1,Ay+(int)(s1*thickness));
               p.addPoint(Bx+1,By+(int)(s1*thickness));
               p.addPoint(Bx-1,By+(int)(s2*thickness));
               p.addPoint(Ax-1,Ay+(int)(s2*thickness));
               return p.contains(x,y);
          public void setInfoDisplay(JLabel jl){this.jl=jl;}
          public void mouseEntered(MouseEvent e){jl.setText(name);}
          public void mouseExited(MouseEvent e){jl.setText("Polygon");}
          public void mouseDragged(MouseEvent e){}
          public void mouseMoved(MouseEvent e){}
          public void mouseClicked(MouseEvent e){}
          public void mousePressed(MouseEvent e){}
          public void mouseReleased(MouseEvent e){}
     private class JPanelCanvas extends JPanel implements MouseInputListener
          private JLabel jl;
          public JPanelCanvas(){}
          public void setInfoDisplay(JLabel jl){this.jl=jl;}
          public void mouseEntered(MouseEvent e){jl.setText("Canvas");}
          public void mouseExited(MouseEvent e){jl.setText("info");}
          public void mouseDragged(MouseEvent e){}
          public void mouseMoved(MouseEvent e){}
          public void mouseClicked(MouseEvent e){}
          public void mousePressed(MouseEvent e){}
          public void mouseReleased(MouseEvent e){}
}if u see the code, the problem is each of the lines are covering the hole frame not just the green line, and i have to use the contains() method to limit the function but i do not want to do that. i just want it to be an object with out need of drawing any lines. just creating and object with the background color. so for example a JPanel in circular form that is only a circle no extra area around it.
if u run the application and run it u will see the JPanel behind the green lines is not accessible by the mouse, the status JLabel shows the name of object can be reached by mouse at the moment and canvas(JPanel) will never be invoked. if the mouse is still on line objects the status name will stay on Polygon and it never changes to canvas.
thanks everyone in advance

Answer 1

Hi,
try searching [www.java2s.com].plenty of sample programs are available.I have a faint memory of seeing a code that loads image files in desired placehoders like polygons n stuff. I guess you could replace the image component by some other component. Hope this helps