| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jface.preference; |
| |
| import org.eclipse.jface.resource.JFaceResources; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Text; |
| |
| /** |
| * A field editor for an integer type preference. |
| */ |
| public class IntegerFieldEditor extends StringFieldEditor { |
| private int minValidValue = 0; |
| |
| private int maxValidValue = Integer.MAX_VALUE; |
| |
| private static final int DEFAULT_TEXT_LIMIT = 10; |
| |
| /** |
| * Creates a new integer field editor |
| */ |
| protected IntegerFieldEditor() { |
| } |
| |
| /** |
| * Creates an integer field editor. |
| * |
| * @param name the name of the preference this field editor works on |
| * @param labelText the label text of the field editor |
| * @param parent the parent of the field editor's control |
| */ |
| public IntegerFieldEditor(String name, String labelText, Composite parent) { |
| this(name, labelText, parent, DEFAULT_TEXT_LIMIT); |
| } |
| |
| /** |
| * Creates an integer field editor. |
| * |
| * @param name the name of the preference this field editor works on |
| * @param labelText the label text of the field editor |
| * @param parent the parent of the field editor's control |
| * @param textLimit the maximum number of characters in the text. |
| */ |
| public IntegerFieldEditor(String name, String labelText, Composite parent, |
| int textLimit) { |
| init(name, labelText); |
| setTextLimit(textLimit); |
| setEmptyStringAllowed(false); |
| setErrorMessage(JFaceResources |
| .getString("IntegerFieldEditor.errorMessage"));//$NON-NLS-1$ |
| createControl(parent); |
| } |
| |
| /** |
| * Sets the range of valid values for this field. |
| * |
| * @param min the minimum allowed value (inclusive) |
| * @param max the maximum allowed value (inclusive) |
| */ |
| public void setValidRange(int min, int max) { |
| minValidValue = min; |
| maxValidValue = max; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on StringFieldEditor. |
| * Checks whether the entered String is a valid integer or not. |
| */ |
| protected boolean checkState() { |
| |
| Text text = getTextControl(); |
| |
| if (text == null) |
| return false; |
| |
| String numberString = text.getText(); |
| try { |
| int number = Integer.valueOf(numberString).intValue(); |
| if (number >= minValidValue && number <= maxValidValue) { |
| clearErrorMessage(); |
| return true; |
| } else { |
| showErrorMessage(); |
| return false; |
| } |
| } catch (NumberFormatException e1) { |
| showErrorMessage(); |
| } |
| |
| return false; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on FieldEditor. |
| */ |
| protected void doLoad() { |
| Text text = getTextControl(); |
| if (text != null) { |
| int value = getPreferenceStore().getInt(getPreferenceName()); |
| text.setText("" + value);//$NON-NLS-1$ |
| } |
| |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on FieldEditor. |
| */ |
| protected void doLoadDefault() { |
| Text text = getTextControl(); |
| if (text != null) { |
| int value = getPreferenceStore().getDefaultInt(getPreferenceName()); |
| text.setText("" + value);//$NON-NLS-1$ |
| } |
| valueChanged(); |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on FieldEditor. |
| */ |
| protected void doStore() { |
| Text text = getTextControl(); |
| if (text != null) { |
| Integer i = new Integer(text.getText()); |
| getPreferenceStore().setValue(getPreferenceName(), i.intValue()); |
| } |
| } |
| |
| /** |
| * Returns this field editor's current value as an integer. |
| * |
| * @return the value |
| * @exception NumberFormatException if the <code>String</code> does not |
| * contain a parsable integer |
| */ |
| public int getIntValue() throws NumberFormatException { |
| return new Integer(getStringValue()).intValue(); |
| } |
| } |