| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.sample.showcase.client.content.i18n; |
| |
| import com.google.gwt.core.client.GWT; |
| import com.google.gwt.core.client.RunAsyncCallback; |
| import com.google.gwt.event.dom.client.ChangeEvent; |
| import com.google.gwt.event.dom.client.ChangeHandler; |
| import com.google.gwt.event.dom.client.KeyUpEvent; |
| import com.google.gwt.event.dom.client.KeyUpHandler; |
| import com.google.gwt.i18n.client.Constants; |
| import com.google.gwt.i18n.client.NumberFormat; |
| import com.google.gwt.sample.showcase.client.ContentWidget; |
| import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseData; |
| import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseSource; |
| import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseStyle; |
| import com.google.gwt.user.client.rpc.AsyncCallback; |
| import com.google.gwt.user.client.ui.Grid; |
| import com.google.gwt.user.client.ui.Label; |
| import com.google.gwt.user.client.ui.ListBox; |
| import com.google.gwt.user.client.ui.TextBox; |
| import com.google.gwt.user.client.ui.Widget; |
| |
| /** |
| * Example file. |
| */ |
| @ShowcaseStyle(".cw-RedText") |
| public class CwNumberFormat extends ContentWidget { |
| /** |
| * The constants used in this Content Widget. |
| */ |
| @ShowcaseSource |
| public static interface CwConstants extends Constants { |
| String cwNumberFormatDescription(); |
| |
| String cwNumberFormatFailedToParseInput(); |
| |
| String cwNumberFormatFormattedLabel(); |
| |
| String cwNumberFormatInvalidPattern(); |
| |
| String cwNumberFormatName(); |
| |
| String cwNumberFormatPatternLabel(); |
| |
| String[] cwNumberFormatPatterns(); |
| |
| String cwNumberFormatValueLabel(); |
| } |
| |
| /** |
| * The {@link NumberFormat} that is currently being applied. |
| */ |
| private NumberFormat activeFormat = null; |
| |
| /** |
| * An instance of the constants. |
| */ |
| @ShowcaseData |
| private final CwConstants constants; |
| |
| /** |
| * The {@link Label} where the formatted value is displayed. |
| */ |
| @ShowcaseData |
| private Label formattedBox = null; |
| |
| /** |
| * The {@link TextBox} that displays the current pattern. |
| */ |
| @ShowcaseData |
| private TextBox patternBox = null; |
| |
| /** |
| * The {@link ListBox} that holds the patterns. |
| */ |
| @ShowcaseData |
| private ListBox patternList = null; |
| |
| /** |
| * The {@link TextBox} where the user enters a value. |
| */ |
| @ShowcaseData |
| private TextBox valueBox = null; |
| |
| /** |
| * Constructor. |
| * |
| * @param constants the constants |
| */ |
| public CwNumberFormat(CwConstants constants) { |
| super(constants.cwNumberFormatName(), constants.cwNumberFormatDescription(), |
| true); |
| this.constants = constants; |
| } |
| |
| /** |
| * Initialize this example. |
| */ |
| @ShowcaseSource |
| @Override |
| public Widget onInitialize() { |
| // Use a Grid to layout the content |
| Grid layout = new Grid(4, 2); |
| layout.setCellSpacing(5); |
| |
| // Add a field to select the pattern |
| patternList = new ListBox(); |
| patternList.setWidth("17em"); |
| String[] patterns = constants.cwNumberFormatPatterns(); |
| for (String pattern : patterns) { |
| patternList.addItem(pattern); |
| } |
| patternList.addChangeHandler(new ChangeHandler() { |
| public void onChange(ChangeEvent event) { |
| updatePattern(); |
| } |
| }); |
| layout.setHTML(0, 0, constants.cwNumberFormatPatternLabel()); |
| layout.setWidget(0, 1, patternList); |
| |
| // Add a field to display the pattern |
| patternBox = new TextBox(); |
| patternBox.setWidth("17em"); |
| patternBox.addKeyUpHandler(new KeyUpHandler() { |
| public void onKeyUp(KeyUpEvent event) { |
| updatePattern(); |
| } |
| }); |
| layout.setWidget(1, 1, patternBox); |
| |
| // Add a field to set the value |
| valueBox = new TextBox(); |
| valueBox.setWidth("17em"); |
| valueBox.setText("31415926535.897932"); |
| valueBox.addKeyUpHandler(new KeyUpHandler() { |
| public void onKeyUp(KeyUpEvent event) { |
| updateFormattedValue(); |
| } |
| }); |
| layout.setHTML(2, 0, constants.cwNumberFormatValueLabel()); |
| layout.setWidget(2, 1, valueBox); |
| |
| // Add a field to display the formatted value |
| formattedBox = new Label(); |
| formattedBox.setWidth("17em"); |
| layout.setHTML(3, 0, constants.cwNumberFormatFormattedLabel()); |
| layout.setWidget(3, 1, formattedBox); |
| |
| // Return the layout Widget |
| updatePattern(); |
| return layout; |
| } |
| |
| @Override |
| protected void asyncOnInitialize(final AsyncCallback<Widget> callback) { |
| GWT.runAsync(CwNumberFormat.class, new RunAsyncCallback() { |
| |
| public void onFailure(Throwable caught) { |
| callback.onFailure(caught); |
| } |
| |
| public void onSuccess() { |
| callback.onSuccess(onInitialize()); |
| } |
| }); |
| } |
| |
| /** |
| * Show an error message. Pass in null to clear the error message. |
| * |
| * @param errorMsg the error message |
| */ |
| @ShowcaseSource |
| private void showErrorMessage(String errorMsg) { |
| if (errorMsg == null) { |
| formattedBox.removeStyleName("cw-RedText"); |
| } else { |
| formattedBox.setText(errorMsg); |
| formattedBox.addStyleName("cw-RedText"); |
| } |
| } |
| |
| /** |
| * Update the formatted value based on the user entered value and pattern. |
| */ |
| @ShowcaseSource |
| private void updateFormattedValue() { |
| String sValue = valueBox.getText(); |
| if (!sValue.equals("")) { |
| try { |
| double value = Double.parseDouble(sValue); |
| String formattedValue = activeFormat.format(value); |
| formattedBox.setText(formattedValue); |
| showErrorMessage(null); |
| } catch (NumberFormatException e) { |
| showErrorMessage(constants.cwNumberFormatFailedToParseInput()); |
| } |
| } else { |
| formattedBox.setText("<None>"); |
| } |
| } |
| |
| /** |
| * Update the selected pattern based on the pattern in the list. |
| */ |
| @ShowcaseSource |
| private void updatePattern() { |
| switch (patternList.getSelectedIndex()) { |
| case 0: |
| activeFormat = NumberFormat.getDecimalFormat(); |
| patternBox.setText(activeFormat.getPattern()); |
| patternBox.setEnabled(false); |
| break; |
| case 1: |
| activeFormat = NumberFormat.getCurrencyFormat(); |
| patternBox.setText(activeFormat.getPattern()); |
| patternBox.setEnabled(false); |
| break; |
| case 2: |
| activeFormat = NumberFormat.getScientificFormat(); |
| patternBox.setText(activeFormat.getPattern()); |
| patternBox.setEnabled(false); |
| break; |
| case 3: |
| activeFormat = NumberFormat.getPercentFormat(); |
| patternBox.setText(activeFormat.getPattern()); |
| patternBox.setEnabled(false); |
| break; |
| case 4: |
| patternBox.setEnabled(true); |
| String pattern = patternBox.getText(); |
| try { |
| activeFormat = NumberFormat.getFormat(pattern); |
| } catch (IllegalArgumentException e) { |
| showErrorMessage(constants.cwNumberFormatInvalidPattern()); |
| return; |
| } |
| break; |
| } |
| |
| // Update the formatted value |
| updateFormattedValue(); |
| } |
| } |