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/*******************************************************************************
* Copyright (c) 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.snippets;
/*
* Button example snippet: create a tri-state button (toggle three states)
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.5
*/
import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
public class Snippet315 {
public static void main(String[] args) {
Display display = new Display ();
Shell shell = new Shell (display);
shell.setLayout(new GridLayout());
final Button button = new Button (shell, SWT.CHECK);
button.setLayoutData(new GridData(GridData.GRAB_VERTICAL | GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_CENTER));
button.setText ("Tri-state");
/* Make the button toggle between three states */
button.addListener (SWT.Selection, new Listener() {
public void handleEvent (Event e) {
if (button.getSelection()) {
if (!button.getGrayed()) {
button.setGrayed(true);
}
} else {
if (button.getGrayed()) {
button.setGrayed(false);
button.setSelection (true);
}
}
}
});
/* Read the tri-state button (application code) */
button.addListener (SWT.Selection, new Listener() {
public void handleEvent (Event e) {
if (button.getGrayed()) {
System.out.println("Grayed");
} else {
if (button.getSelection()) {
System.out.println("Selected");
} else {
System.out.println("Not selected");
}
}
}
});
shell.setSize(300, 300);
shell.open ();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ()) display.sleep ();
}
display.dispose ();
}
}
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