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/*******************************************************************************
* Copyright (c) 2019 Patrick Tasse and others. All rights reserved.
* The contents of this file are made available under the terms
* of the GNU Lesser General Public License (LGPL) Version 2.1 that
* accompanies this distribution (lgpl-v21.txt). The LGPL is also
* available at http://www.gnu.org/licenses/lgpl.html. If the version
* of the LGPL at http://www.gnu.org is different to the version of
* the LGPL accompanying this distribution and there is any conflict
* between the two license versions, the terms of the LGPL accompanying
* this distribution shall govern.
*
* Contributors:
* Patrick Tasse - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.tests.gtk.snippets;
import java.util.Arrays;
import java.util.function.Function;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Widget;
public class Bug547227_GroupMemoryLeak {
private static final int NUM_ITERATIONS = 20;
private static final int NUM_WIDGETS = 400;
public static void main(String[] args) {
Display display = new Display();
System.out.println("gtk version: " + System.getProperty("org.eclipse.swt.internal.gtk.version"));
System.out.println();
Function<Composite, Widget> compositeCreator = parent -> {
Composite composite = new Composite(parent, SWT.NONE);
composite.setLayout(new GridLayout());
composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
return composite;
};
Function<Composite, Widget> groupCreator = parent -> {
Group group = new Group(parent, SWT.NONE);
group.setLayout(new GridLayout());
group.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
return group;
};
for (Function<Composite, Widget> creator : Arrays.asList(compositeCreator, groupCreator)) {
for (int i = 1; i <= NUM_ITERATIONS; i++) {
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
Composite composite = new Composite(shell, SWT.NONE);
composite.setLayout(new GridLayout(40, false));
Widget widget = null;
for (int k = 0; k < NUM_WIDGETS; k++) {
widget = creator.apply(composite);
}
shell.pack();
shell.open();
while (display.readAndDispatch()) {
}
display.sleep();
long t1 = System.currentTimeMillis();
System.out.print(String.format("shell.dispose() for %s with %d %s [%d]...\t", shell, NUM_WIDGETS, widget.getClass().getSimpleName(), i));
shell.dispose();
long t2 = System.currentTimeMillis();
System.out.print(String.format("%4d ms ", (t2-t1)));
for (int n = 0; n < (t2-t1); n+=10) {
System.out.print("=");
}
System.out.println();
}
System.out.println();
}
display.dispose();
}
}
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