diff --git a/examples/src/main/java/edu/umd/cs/piccolo/examples/pswing/PSwingMemoryLeakExample.java b/examples/src/main/java/edu/umd/cs/piccolo/examples/pswing/PSwingMemoryLeakExample.java new file mode 100644 index 0000000..a121260 --- /dev/null +++ b/examples/src/main/java/edu/umd/cs/piccolo/examples/pswing/PSwingMemoryLeakExample.java @@ -0,0 +1,229 @@ +/* + * Copyright (c) 2008-2009, Piccolo2D project, http://piccolo2d.org + * Copyright (c) 1998-2008, University of Maryland + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, are permitted provided + * that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this list of conditions + * and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, this list of conditions + * and the following disclaimer in the documentation and/or other materials provided with the + * distribution. + * + * None of the name of the University of Maryland, the name of the Piccolo2D project, or the names of its + * contributors may be used to endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +package edu.umd.cs.piccolo.examples.pswing; + +import java.awt.BorderLayout; +import java.awt.Dimension; +import java.awt.FlowLayout; + +import java.awt.event.ActionEvent; +import java.awt.event.ActionListener; + +import javax.swing.JFrame; +import javax.swing.JLabel; +import javax.swing.JPanel; +import javax.swing.SwingUtilities; +import javax.swing.Timer; + +import edu.umd.cs.piccolo.PCanvas; + +import edu.umd.cs.piccolo.nodes.PText; + +import edu.umd.cs.piccolox.pswing.PSwing; +import edu.umd.cs.piccolox.pswing.PSwingCanvas; + +/** + * Attempt to replicate the PSwingRepaintManager-related memory leak + * reported in Issue 74. + */ +public final class PSwingMemoryLeakExample extends JFrame { + + /** Default serial version UID. */ + private static final long serialVersionUID = 1L; + + /** Counter. */ + private final PText counter; + + /** Memory. */ + private final PText freeMemory; + + /** Total memory. */ + private final PText totalMemory; + + /** Used memory. */ + private final PText usedMemory; + + /** Canvas. */ + private final PCanvas canvas; + + /** Main panel, container for PSwingCanvases. */ + private final JPanel mainPanel; + + + /** + * Create a new PSwing memory leak example. + */ + public PSwingMemoryLeakExample() { + super("PSwing memory leak example"); + + PText label0 = new PText("Number of active PSwingCanvases:"); + counter = new PText("0"); + PText label1 = new PText("Total memory:"); + totalMemory = new PText("0"); + PText label2 = new PText("Free memory:"); + freeMemory = new PText("0"); + PText label3 = new PText("Used memory:"); + usedMemory = new PText("0"); + + label0.offset(20.0d, 20.0d); + counter.offset(label0.getFullBounds().getWidth() + 40.0d, 20.0d); + label1.offset(20.0d, 40.0d); + totalMemory.offset(label1.getFullBounds().getWidth() + 40.0d, 40.0d); + label2.offset(20.0d, 60.0d); + freeMemory.offset(label2.getFullBounds().getWidth() + 40.0d, 60.0d); + label3.offset(freeMemory.getFullBounds().getX() + 80.0d, 60.0d); + usedMemory.offset(label3.getFullBounds().getX() + label3.getFullBounds().getWidth() + 20.0d, 60.0d); + + canvas = new PCanvas(); + canvas.getCamera().addChild(label0); + canvas.getCamera().addChild(counter); + canvas.getCamera().addChild(label1); + canvas.getCamera().addChild(totalMemory); + canvas.getCamera().addChild(label2); + canvas.getCamera().addChild(freeMemory); + canvas.getCamera().addChild(label3); + canvas.getCamera().addChild(usedMemory); + canvas.setPreferredSize(new Dimension(400, 100)); + + mainPanel = new JPanel(); + mainPanel.setPreferredSize(new Dimension(400, 300)); + mainPanel.setLayout(new FlowLayout()); + + getContentPane().setLayout(new BorderLayout()); + getContentPane().add("North", canvas); + getContentPane().add("Center", mainPanel); + + final Timer add = new Timer(250, new ActionListener() + { + int id = 0; + + /** {@inheritDoc} */ + public void actionPerformed(final ActionEvent e) { + JLabel label = new JLabel("Label" + id); + PSwing pswing = new PSwing(label); + PSwingCanvas pswingCanvas = new PSwingCanvas(); + pswingCanvas.getLayer().addChild(pswing); + pswingCanvas.setPreferredSize(new Dimension(60, 18)); + mainPanel.add(pswingCanvas); + mainPanel.invalidate(); + mainPanel.validate(); + mainPanel.repaint(); + + id++; + incrementCounter(); + } + }); + add.setDelay(5); + add.setRepeats(true); + + final Timer remove = new Timer(20000, new ActionListener() + { + /** {@inheritDoc} */ + public void actionPerformed(final ActionEvent e) { + if (add.isRunning()) { + add.stop(); + } + int i = mainPanel.getComponentCount() - 1; + if (i > 0) { + mainPanel.remove(mainPanel.getComponentCount() - 1); + mainPanel.invalidate(); + mainPanel.validate(); + mainPanel.repaint(); + decrementCounter(); + } + } + }); + remove.setDelay(5); + remove.setRepeats(true); + + final Timer updateMemory = new Timer(500, new ActionListener() + { + /** {@inheritDoc} */ + public void actionPerformed(final ActionEvent e) { + updateMemory(); + } + }); + updateMemory.setDelay(2000); + updateMemory.setRepeats(true); + + add.start(); + remove.start(); + updateMemory.start(); + + setDefaultCloseOperation(EXIT_ON_CLOSE); + setBounds(100, 100, 400, 400); + setVisible(true); + } + + /** + * Increment counter. + */ + private void incrementCounter() { + int count = Integer.parseInt(counter.getText()); + count++; + counter.setText(String.valueOf(count)); + } + + /** + * Decrement counter. + */ + private void decrementCounter() { + int count = Integer.parseInt(counter.getText()); + count--; + counter.setText(String.valueOf(count)); + } + + /** + * Update memory. + */ + private void updateMemory() { + System.gc(); + long total = Runtime.getRuntime().totalMemory(); + totalMemory.setText(String.valueOf(total)); + long free = Runtime.getRuntime().freeMemory(); + freeMemory.setText(String.valueOf(free)); + long used = (total - free); + usedMemory.setText(String.valueOf(used)); + } + + + /** + * Main. + * + * @param args command line arguments, ignored + */ + public static void main(final String[] args) { + SwingUtilities.invokeLater(new Runnable() { + /** {@inheritDoc} */ + public void run() { + new PSwingMemoryLeakExample(); + } + }); + } +}