| /******************************************************************************* |
| * Copyright (c) 2011 Laurent CARON |
| * 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: |
| * Laurent CARON (laurent.caron at gmail dot com) - Initial implementation and API |
| *******************************************************************************/ |
| package org.mihalis.opal.preferenceWindow.widgets; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.VerifyEvent; |
| import org.eclipse.swt.events.VerifyListener; |
| import org.mihalis.opal.preferenceWindow.PreferenceWindow; |
| import org.mihalis.opal.utils.StringUtil; |
| |
| /** |
| * Instances of this class are text box to type floats. |
| */ |
| public class PWFloatText extends PWText { |
| |
| /** |
| * Constructor. |
| * |
| * @param label associated label |
| * @param propertyKey associated key |
| */ |
| public PWFloatText(final String label, final String propertyKey) { |
| super(label, propertyKey); |
| } |
| |
| /** |
| * Adds the verify listeners. |
| * |
| * @see org.mihalis.opal.preferenceWindow.widgets.PWText#addVerifyListeners() |
| */ |
| @Override |
| public void addVerifyListeners() { |
| this.text.addVerifyListener(new VerifyListener() { |
| |
| @Override |
| public void verifyText(final VerifyEvent e) { |
| if (e.character != 0 && !Character.isDigit(e.character) && e.keyCode != SWT.BS && e.keyCode != SWT.DEL && e.character != '.' && e.character != ',') { |
| e.doit = false; |
| return; |
| } |
| |
| e.doit = verifyEntry(e.text, e.keyCode); |
| |
| } |
| }); |
| |
| } |
| |
| /** |
| * Check if an entry is a float. |
| * |
| * @param entry text typed by the user |
| * @param keyCode key code |
| * @return true if the user typed a float value, false otherwise |
| */ |
| private boolean verifyEntry(final String entry, final int keyCode) { |
| final String work; |
| if (keyCode == SWT.DEL) { |
| work = StringUtil.removeCharAt(this.text.getText(), this.text.getCaretPosition()); |
| } else if (keyCode == SWT.BS && this.text.getCaretPosition() == 0) { |
| work = StringUtil.removeCharAt(this.text.getText(), this.text.getCaretPosition() - 1); |
| } else if (keyCode == 0) { |
| work = entry; |
| } else { |
| work = StringUtil.insertString(this.text.getText(), entry, this.text.getCaretPosition()); |
| } |
| |
| try { |
| Double.parseDouble(work.replace(',', '.')); |
| } catch (final NumberFormatException nfe) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Check. |
| * |
| * @see org.mihalis.opal.preferenceWindow.widgets.PWWidget#check() |
| */ |
| @Override |
| public void check() { |
| final Object value = PreferenceWindow.getInstance().getValueFor(getPropertyKey()); |
| if (value == null) { |
| PreferenceWindow.getInstance().setValue(getPropertyKey(), new Float(0)); |
| } else { |
| if (!(value instanceof Float)) { |
| throw new UnsupportedOperationException("The property '" + getPropertyKey() + "' has to be a Float because it is associated to a float text widget"); |
| } |
| } |
| } |
| |
| /** |
| * Convert value. |
| * |
| * @return the object |
| * @see org.mihalis.opal.preferenceWindow.widgets.PWText#convertValue() |
| */ |
| @Override |
| public Object convertValue() { |
| return Float.parseFloat(this.text.getText()); |
| } |
| |
| /** |
| * Gets the style. |
| * |
| * @return the style |
| * @see org.mihalis.opal.preferenceWindow.widgets.PWText#getStyle() |
| */ |
| @Override |
| public int getStyle() { |
| return SWT.NONE; |
| } |
| |
| } |