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PWRadio.java
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PWRadio.java
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/*******************************************************************************
* Copyright (c) 2011 Laurent CARON
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Laurent CARON (laurent.caron at gmail dot com) - Initial implementation and API
*******************************************************************************/
package org.eclipse.nebula.widgets.opal.preferencewindow.widgets;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.eclipse.nebula.widgets.opal.preferencewindow.PreferenceWindow;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
/**
* Instances of this class are a group of radio buttons
*
*/
public class PWRadio extends PWWidget {
private final List<Object> data;
private final List<Button> buttons;
/**
* Constructor
*
* @param label associated label
* @param propertyKey associated key
*/
public PWRadio(final String label, final String prop, final Object... values) {
super(null, prop, label == null ? 1 : 2, false);
data = new ArrayList<Object>(Arrays.asList(values));
buttons = new ArrayList<Button>();
}
@Override
public Control build(final Composite parent) {
buildLabel(parent, GridData.BEGINNING);
final Composite composite = new Composite(parent, SWT.NONE);
final GridLayout gridLayout = new GridLayout();
gridLayout.marginHeight = gridLayout.marginWidth = 0;
composite.setLayout(gridLayout);
for (final Object datum : data) {
final Button button = new Button(composite, SWT.RADIO);
addControl(button);
button.setText(datum.toString());
button.setLayoutData(new GridData(GridData.FILL, GridData.BEGINNING, true, false));
button.setSelection(datum.equals(PreferenceWindow.getInstance().getValueFor(getPropertyKey())));
button.setData(datum);
button.addListener(SWT.Selection, event -> {
if (button.getSelection()) {
PreferenceWindow.getInstance().setValue(getPropertyKey(), button.getData());
}
});
buttons.add(button);
}
return composite;
}
@Override
public void check() {
final Object value = PreferenceWindow.getInstance().getValueFor(getPropertyKey());
if (value == null) {
PreferenceWindow.getInstance().setValue(getPropertyKey(), null);
} else {
if (!data.isEmpty()) {
if (!value.getClass().equals(data.get(0).getClass())) {
throw new UnsupportedOperationException("The property '" + getPropertyKey() + "' has to be a " + data.get(0).getClass() + " because it is associated to a combo");
}
}
}
}
}