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POOrder of rectangles to display and can they be changed?
 

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  1. POOrder of rectangles to display and can they be changed?
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    <p>I working on a project in which I have to simulate a memory manager and show some memory snapshots. I have created a draw class via examples I have found here in which I override the paintComponet(). Everything draws fine.</p> <p>I would like to be able to draw a rectangle to represent a memory partition and then overlay another rectangle over top to represent an incoming job (ie Job1 is in this partition3). What seems to occur is that I add the partition first (which will always be the case) and then when I add the job it will sit behind the partition block. Is there a way other than drawing the Job first to shift these after the job is created?</p> <p>Here is the paint override</p> <pre><code>@Override public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D)g; // set up rendering to allow anti-aliasing g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); // create the rectangle to represent the memory partition block // x = address position h = amount of memory (y &amp; w are predefined for the display block) Rectangle2D rect = new Rectangle2D.Double(x, y, w, h); // create the rectangle g2d.setPaint(partColor); // set it's color g2d.fill(rect); // fill it in // create the transparency for the text Composite comp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, .4f); g2d.setComposite(comp); // draw the text with color, type and size and center the text in the block created above g2d.setPaint(Color.black); g2d.setFont(new Font("Tahoma", Font.PLAIN, 12)); g2d.drawString(text, (int)((w / 2) - (text.length()/2)), (int)h/2); } </code></pre> <p>The call to draw is in my window class (this will place the partition in front of the job) but I need to order to be reversed without changing the order of the calls.</p> <pre><code> // Draw both Text and Block with transparency DrawPartition part1 = new DrawPartition(Color.blue, 0, 0, 110, 100, "part1"); part1.setBounds(5, 5, 110, 100); snapPanel.add(part1); DrawJob job1 = new DrawJob(Color.green, 0, 0, 110, 100, "Job 1"); job1.setBounds(5, 15, 110, 100); snapPanel.add(job1); </code></pre>
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