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PWSpinner.java
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PWSpinner.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 org.eclipse.nebula.widgets.opal.preferencewindow.PreferenceWindow;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Spinner;
/**
* Instances of this class are spinners
*/
public class PWSpinner extends PWWidget {
private final int max;
private final int min;
/**
* Constructor
*
* @param label associated label
* @param propertyKey associated key
* @param min minimum value
* @param max maximum value
*/
public PWSpinner(final String label, final String propertyKey, final int min, final int max) {
super(label, propertyKey, label == null ? 1 : 2, false);
this.min = min;
this.max = max;
}
@Override
public Control build(final Composite parent) {
buildLabel(parent, GridData.CENTER);
final Spinner spinner = new Spinner(parent, SWT.HORIZONTAL | SWT.BORDER);
addControl(spinner);
spinner.setMinimum(min);
spinner.setMaximum(max);
final Integer originalValue = (Integer) PreferenceWindow.getInstance().getValueFor(getPropertyKey());
spinner.setSelection(originalValue.intValue());
spinner.addListener(SWT.Modify, event -> {
PreferenceWindow.getInstance().setValue(getPropertyKey(), Integer.valueOf(spinner.getSelection()));
});
return spinner;
}
@Override
public void check() {
final Object value = PreferenceWindow.getInstance().getValueFor(getPropertyKey());
if (value == null) {
PreferenceWindow.getInstance().setValue(getPropertyKey(), Integer.valueOf(min));
} else {
if (!(value instanceof Integer)) {
throw new UnsupportedOperationException("The property '" + getPropertyKey() + "' has to be an Integer because it is associated to a spinner");
}
final int valueAsInt = ((Integer) value).intValue();
if (valueAsInt < min || valueAsInt > max) {
throw new UnsupportedOperationException("The property '" + getPropertyKey() + "' is out of range (value is " + valueAsInt + ", range is " + min + "-" + max + ")");
}
}
}
}