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/*******************************************************************************
* Copyright (c) 2000, 2016 IBM Corporation and others.
*
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.snippets;
/*
* Combo example snippet: add a new number item to a combo box
*
* 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.layout.*;
import org.eclipse.swt.widgets.*;
public class Snippet289 {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Snippet 289");
shell.setLayout(new FillLayout());
final Combo combo = new Combo(shell, SWT.NONE);
combo.setItems("1111", "2222", "3333", "4444");
combo.setText(combo.getItem(0));
combo.addVerifyListener(e -> {
String text = combo.getText();
String newText = text.substring(0, e.start) + e.text + text.substring(e.end);
try {
if (newText.length() != 0) Integer.parseInt(newText);
} catch (NumberFormatException ex) {
e.doit = false;
}
});
combo.addTraverseListener(e -> {
if (e.detail == SWT.TRAVERSE_RETURN) {
e.doit = false;
e.detail = SWT.TRAVERSE_NONE;
String newText = combo.getText();
try {
Integer.parseInt(newText);
combo.add(newText);
combo.setSelection(new Point(0, newText.length()));
} catch (NumberFormatException ex) {
}
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
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