JPanel scroll paint problems

[Lee Barney]

I have a JPanel with several objects embedded in it for which I have overwritten paint(). When I scroll the view port, the portions of the objects that used to be outside the view port are painted in the correct positions in the JPanel, but they also are painted in the header.
???
What have I done wrong?
Here is the paint code for the objects in the JPanel. They exist in other JPanels inside the main JPanel mentioned above.
Thank you

 public void paint(Graphics g){
    
        System.out.println("Painting task "+getTask());
        SaHScheduleDropField parent = ((SaHScheduleDropField)getParent());
        int xPosition = 0;
        int yPosition = 2;
        int height = parent.getHeight()-3;
        //System.out.println("Parent = "+parent);
        System.out.println("parents employee "+ parent.getEmployee());
        if(parent.getEmployee() != null){//then must be scheduled
            SaHScheduler scheduler = (SaHScheduler)parent.getTopLevelAncestor();
            //System.out.println("scheduler = "+scheduler);
            SaHTask aTask = getTask();
            if(aTask.isTimeOff()){
                setBackground(new Color(253,171,99));
            }
            if(aTask.getEndDate().before(scheduler.getDispStartDate())
                || aTask.getStartDate().after(scheduler.getDispEndDate())){
                System.out.println("rejecting since end date befor disp start date or starts after disp end");
                return;
            }
            long windowWidth = scheduler.getDispEndDate().getTimeInMillis() - scheduler.getDispStartDate().getTimeInMillis();
            //System.out.println("windowWidth = "+windowWidth);
            //System.out.println("dropFieldWidth = "+parent.getWidth());
            double pointsPerMillis = (double)parent.getWidth()/(double)windowWidth;
            //System.out.println("pointPerMillis = "+pointsPerMillis);
            long taskWidth = (long)(aTask.getDuration()*60*60*1000);//duration is in hours
            //System.out.println("taskWidth = "+taskWidth);
            if(taskWidth <= 0){//ensure no zero answer and no division by zero
                taskWidth = 1;
            }
            if(windowWidth <= 0){
                windowWidth = 100000;
            }
            int width = (int)((double)(taskWidth)*pointsPerMillis);
            if(width == 0){
                width = 1;
            }
            
                
            //
            //calculate the x,y location of the block
            //
            
            long timeOffsetMillis = 0;
            
            if(scheduler.getDispStartDate().getTimeInMillis() >= aTask.getStartDate().getTimeInMillis()
                && scheduler.getDispEndDate().getTimeInMillis() <= aTask.getEndDate().getTimeInMillis()){
                    //then spans entire display
                    timeOffsetMillis = 0;
                    width = (int)windowWidth;
                    System.out.println("printing full width");
            }
            else if(aTask.getStartDate().after(scheduler.getDispStartDate())){
                timeOffsetMillis = aTask.getStartDate().getTimeInMillis() - scheduler.getDispStartDate().getTimeInMillis();
            }
            else if(aTask.getStartDate().before(scheduler.getDispStartDate())){
                timeOffsetMillis = 0;
                int timePriorToDisplay = (int)(scheduler.getDispStartDate().getTimeInMillis() - aTask.getStartDate().getTimeInMillis());
                //System.out.println("prior time "+timePriorToDisplay);
                //System.out.println("pror width "+width);
                width = width - (int)(timePriorToDisplay*pointsPerMillis);
                //System.out.println("after width "+width);
            }
            System.out.println("DispStart = "+DateFormat.getDateTimeInstance().format(scheduler.getDispStartDate().getTime()));
            System.out.println("TaskStart = "+DateFormat.getDateTimeInstance().format(aTask.getStartDate().getTime()));
            System.out.println("TaskEnd = "+DateFormat.getDateTimeInstance().format(aTask.getEndDate().getTime()));
            //System.out.println("time offset hrs = "+(timeOffsetMillis/1000/60/60));
            xPosition = (int)(timeOffsetMillis * pointsPerMillis);
            yPosition = 2;
            System.out.println(aTask.getPatientName()+" x,y,width,height "+xPosition+","+yPosition+","+width+","+height);
            setBounds(xPosition,yPosition,width,height);
            
        }
        super.paint(g);
        
  }
  

[Tamizh Selvan]

Try calling invalidate() method.Hope this would solve ur probs
good luck

[Lee Barney]

I tried calling invalidate on the header with a AdjustmentLister and there was no difference. I call revalidate() and repaint() on the header and after the items being painted in the JPanel flash in the header they disapear. It is also kind of chunky during the scroll.
Ideas?

[Tamizh Selvan]

k do 1 thing. if u did'nt override the update(Graphics g) method. do it. and call ur paint ur panel only from here. actually i used this approach for removing extra paintings on my applet.Also do try itemChangeListener insted of AdjustmentListener.
good luck.
Marcus
[ October 16, 2003: Message edited by: Marcus Blue ]