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/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.examples.controlexample;
import org.eclipse.swt.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.events.*;
/**
* <code>AlignableTab</code> is the abstract
* superclass of example controls that can be
* aligned.
*/
abstract class AlignableTab extends Tab {
/* Alignment Controls */
Button leftButton, rightButton, centerButton;
/* Alignment Group */
Group alignmentGroup;
/**
* Creates the Tab within a given instance of ControlExample.
*/
AlignableTab(ControlExample instance) {
super(instance);
}
/**
* Creates the "Control" group.
*/
void createControlGroup () {
super.createControlGroup ();
/* Create the group */
alignmentGroup = new Group (controlGroup, SWT.NONE);
alignmentGroup.setLayout (new GridLayout ());
alignmentGroup.setLayoutData (new GridData(GridData.HORIZONTAL_ALIGN_FILL |
GridData.VERTICAL_ALIGN_FILL));
alignmentGroup.setText (ControlExample.getResourceString("Alignment"));
/* Create the controls */
leftButton = new Button (alignmentGroup, SWT.RADIO);
leftButton.setText (ControlExample.getResourceString("Left"));
centerButton = new Button (alignmentGroup, SWT.RADIO);
centerButton.setText(ControlExample.getResourceString("Center"));
rightButton = new Button (alignmentGroup, SWT.RADIO);
rightButton.setText (ControlExample.getResourceString("Right"));
/* Add the listeners */
SelectionListener selectionListener = new SelectionAdapter () {
public void widgetSelected(SelectionEvent event) {
if (!((Button) event.widget).getSelection ()) return;
setExampleWidgetAlignment ();
};
};
leftButton.addSelectionListener (selectionListener);
centerButton.addSelectionListener (selectionListener);
rightButton.addSelectionListener (selectionListener);
}
/**
* Sets the alignment of the "Example" widgets.
*/
abstract void setExampleWidgetAlignment ();
/**
* Sets the state of the "Example" widgets.
*/
void setExampleWidgetState () {
super.setExampleWidgetState ();
Control [] controls = getExampleWidgets ();
if (controls.length != 0) {
leftButton.setSelection ((controls [0].getStyle () & SWT.LEFT) != 0);
centerButton.setSelection ((controls [0].getStyle () & SWT.CENTER) != 0);
rightButton.setSelection ((controls [0].getStyle () & SWT.RIGHT) != 0);
}
}
}
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