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/*******************************************************************************
* Copyright (c) 2000, 2004 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;
/*
* Canvas example snippet: implement tab traversal (behave like a tab group)
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*/
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
public class Snippet21 {
public static void main (String [] args) {
Display display = new Display ();
final Color red = display.getSystemColor (SWT.COLOR_RED);
final Color blue = display.getSystemColor (SWT.COLOR_BLUE);
Shell shell = new Shell (display);
Button b = new Button (shell, SWT.PUSH);
b.setBounds (10, 10, 100, 32);
b.setText ("Button");
shell.setDefaultButton (b);
final Canvas c = new Canvas (shell, SWT.BORDER);
c.setBounds (10, 50, 100, 32);
c.addListener (SWT.Traverse, new Listener () {
public void handleEvent (Event e) {
switch (e.detail) {
/* Do tab group traversal */
case SWT.TRAVERSE_ESCAPE:
case SWT.TRAVERSE_RETURN:
case SWT.TRAVERSE_TAB_NEXT:
case SWT.TRAVERSE_TAB_PREVIOUS:
case SWT.TRAVERSE_PAGE_NEXT:
case SWT.TRAVERSE_PAGE_PREVIOUS:
e.doit = true;
break;
}
}
});
c.addListener (SWT.FocusIn, new Listener () {
public void handleEvent (Event e) {
c.setBackground (red);
}
});
c.addListener (SWT.FocusOut, new Listener () {
public void handleEvent (Event e) {
c.setBackground (blue);
}
});
c.addListener (SWT.KeyDown, new Listener () {
public void handleEvent (Event e) {
System.out.println ("KEY");
for (int i=0; i<64; i++) {
Color c1 = red, c2 = blue;
if (c.isFocusControl ()) {
c1 = blue; c2 = red;
}
c.setBackground (c1);
c.update ();
c.setBackground (c2);
}
}
});
Text t = new Text (shell, SWT.SINGLE | SWT.BORDER);
t.setBounds (10, 85, 100, 32);
Text r = new Text (shell, SWT.MULTI | SWT.BORDER);
r.setBounds (10, 120, 100, 32);
c.setFocus ();
shell.setSize (200, 200);
shell.open ();
while (!shell.isDisposed()) {
if (!display.readAndDispatch ()) display.sleep ();
}
display.dispose ();
}
}
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