| /******************************************************************************* |
| * Copyright (c) 2000, 2016 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; |
| |
| /* |
| * 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.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(); |
| } |
| } |