Aarti
Posts: 6
Nickname: aarti
Registered: Apr, 2002
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Re: events in java
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Posted: Apr 18, 2002 11:47 AM
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thank u for ur replies....
this is the code....i get the GUI to display but the events are not called..keep in mind that it is part of a big application........
package webprinter.collect.dbcollect;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import webprinter.collect.DocumentBoundaryCollector;
class GenerateTree extends Component implements MouseListener,ActionListener
{
private int pageCount;
private Vector co_Ordinates = new Vector();
private ArrayList pageList = new ArrayList();
private ArrayList pages = new ArrayList();
private Hashtable coodTable = new Hashtable();
private String label = "1";
private DBCollectorImpl collector;
private Graphics g;
GenerateTree(int count,DBCollectorImpl collector)
{
//adds listeners to the ovals
this.addMouseListener(this);
this.collector = collector;
//assigns count to page count to be used later for the number of ovals
pageCount = count;
Frame frame = new Frame("Tree Diagram of webpages") ;
frame.add(this);
//to close the window
frame.addWindowListener(new WindowAdapter()
{
public void windowClosing (WindowEvent we)
{
System.exit(1);
}
} );
Button okButton = new Button("OK");
okButton.setActionCommand("OK");
okButton.addActionListener(this);
Button cancelButton = new Button("Cancel");
cancelButton.setActionCommand("Cancel");
cancelButton.addActionListener(this);
Panel buttonPanel = new Panel();
FlowLayout flow = new FlowLayout(FlowLayout.CENTER);
buttonPanel.setLayout(flow);
flow.setHgap(25);
buttonPanel.add(okButton);
buttonPanel.add(cancelButton);
frame.add(buttonPanel,"South");
frame.setSize( 400, 600 );
System.out.println("end of contrcutor");
//update(getGraphics());
frame.setVisible(true) ;
paint();
}
public void paint()
{
g = getGraphics();
int centerX = 200, centerY = 80, i;
int height = 80, width = 100, x = 190, x1 = 150;
System.out.println("in paint loop");
for( i = 1;i<=pageCount;i++)
{
g.setColor(Color.black);
g.drawOval(centerX, centerY, 40, 40);
g.setColor(Color.gray);
g.fillOval(centerX, centerY, 40, 40);
//add the co-ordinates with in a vector for comparison later
co_Ordinates.add(new OvalCord(centerX, centerY));
g.setColor(getForeground());
label = label.valueOf(i);
coodTable.put(new Integer(centerY),new Integer(label));
g.drawString(label.valueOf(i) , centerX+17, centerY+22 );
if(i<pageCount)
{
g.drawLine (centerX + 20,centerY+40,centerX+20,centerY+80);
g.drawLine (centerX + 20,centerY+80,centerX+30,centerY+70);
g.drawLine (centerX + 20,centerY+80,centerX+10,centerY+70);
//for drawings arcs on both sides
if( i % 2 ==0 )
{
g.drawArc(x, 100, width , height, -90, 180 );
}
else
{
g.drawArc(x1, 100, width , height, 90, 180 );
}
}
height = height + 80;
width = width + 60;
centerY = centerY + 80; x = x - 30;
x1 = x1 - 30;
}
System.out.println("end of paint loop"); }
public Dimension getPreferredSize()
{
Font f = getFont();
if( f != null )
{
FontMetrics fm = getFontMetrics( f );
int max = Math.max( fm.stringWidth(label)+10,
fm.getHeight()+10 );
return new Dimension( max, max );
}
else
{
return new Dimension( 100, 100 );
}
}
//mouse events
public void mouseClicked(MouseEvent me)
{
int x = me.getX();
int y = me.getY();
boolean doBreak = false;
for(int i=0; i<co_Ordinates.size(); i++)
{
OvalCord OC = (OvalCord) co_Ordinates.get(i); if ( x<OC.x+40 && x>OC.x)
{
if (y<OC.y+40 && y>OC.y)
{
Graphics g = getGraphics();
g.setColor( Color.black);
g.fillOval(OC.x,OC.y,40,40);
//get the number of the webpage that is clicked
Integer webpagesLabel = getLabels(new Integer(OC.y));
//add it to a vector
pages.add(webpagesLabel);
}
}
}
}
public void mouseEntered(MouseEvent me)
{
//System.out.println("SUCESS2");
}
public void mouseExited(MouseEvent me)
{
//System.out.println("SUCESS3");
}
public void mousePressed(MouseEvent me)
{
//System.out.println("SUCESS4");
}
public void mouseReleased(MouseEvent me)
{
//System.out.println("SUCESS5");
}
//action events for the 2 buttons
public void actionPerformed(ActionEvent ae)
{
String actionCommand = ae.getActionCommand();
if(actionCommand.compareTo( "Cancel" ) == 0 )
{
repaint();
}
if(actionCommand.compareTo( "OK" ) == 0 )
{
pageList = pages;
synchronized(collector){
collector.notify();}
}
}
//returns the label associated with the co-ordinates.
public Integer getLabels( Integer coods )
{
Integer number = (Integer)coodTable.get(coods);
return number;
}
public synchronized ArrayList getPagesList()
{
try
{
wait();
}
catch(InterruptedException ie)
{
ie.printStackTrace();
}
return pageList;
}
}
class OvalCord
{
public int x, y;
public OvalCord(int x, int y)
{
this.x = x;
this.y = y;
}
public String toString()
{
return "centerX = "+x+" centerY = "+y+ " | ";
}
};
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