/*
* 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.widgetideas.client;
/**
* Currency Text Widget With Preview
*
* This class further extends CurrencyWidget with the functionality of preview.
* User will be able to see the formatted string with marked visual clue about
* the value they are inputting.
*
* Usage: RootPanel rootPanel = RootPanel.get();
*
* CurrencyWidgetWithPreview currencyWidget = new CurrencyWidget();
* rootPanel.add(currencyWidget, 180, 32);
*
* clickMeButton = new Button(); rootPanel.add(clickMeButton, 394, 32);
* clickMeButton.setText("See what you got!");
* clickMeButton.addClickListener(new ClickListener() { public void
* onClick(Widget sender) { Window.alert("You entered: " +
* Double.toString(currencyWidget.getAmount())); } });
*
*/
import com.google.gwt.core.client.GWT;
import com.google.gwt.libideas.client.StyleInjector;
import com.google.gwt.libideas.resources.client.ImmutableResourceBundle;
import com.google.gwt.libideas.resources.client.TextResource;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.FocusListener;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.KeyboardListenerAdapter;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.Widget;
/**
* TODO JavaDoc.
*
*/
public class CurrencyWidgetWithPreview extends CurrencyWidget {
interface Resources extends ImmutableResourceBundle {
public static final Resources INSTANCE = GWT.create(Resources.class);
/**
* @gwt.resource CurrencyWidgetPreview.css
*/
public TextResource css();
}
// private static final String STYLENAME_DEFAULT = "gwt-FastTree";
private static final String decimalSeparator = CurrencyWidget.numberConstants.decimalSeparator();
CurrencyWidgetWithPreview widget = this;
private final PopupPanel previewPanel = new PopupPanel();
private final HTML previewField = new HTML();
private final Timer previewTimer = new Timer() {
public void run() {
String str = reformatContent();
int pos = str.indexOf(decimalSeparator);
previewField.setHTML("<div class='previewPanel'>"
+ "<span class='integerPart'>" + str.substring(0, pos + 1)
+ "</span>" + "<span class='decimalPart'>" + str.substring(pos + 1)
+ "</span></div>");
}
};
/**
* Constructs a CurrencyWidgetWithPreview object.
*/
public CurrencyWidgetWithPreview() {
this(numberConstants.defCurrencyCode());
}
/**
* Constructs a CurrencyWidgetWithPreview object with specified currency.
*
* @param currencyCode International currency code (ISO 4217).
*/
public CurrencyWidgetWithPreview(String currencyCode) {
super(currencyCode);
StyleInjector.injectStylesheet(Resources.INSTANCE.css().getText(),
Resources.INSTANCE);
previewPanel.setWidget(previewField);
amountBox.addFocusListener(new FocusListener() {
public void onFocus(Widget sender) {
if (!valueInitiated) {
amountBox.setText("");
valueInitiated = true;
}
previewPanel.setPopupPosition(amountBox.getAbsoluteLeft(),
amountBox.getAbsoluteTop() + amountBox.getOffsetHeight() + 2);
previewPanel.show();
}
public void onLostFocus(Widget sender) {
amountBox.setText(widget.reformatContent());
previewPanel.hide();
}
});
amountBox.addKeyboardListener(new KeyboardListenerAdapter() {
public void onKeyDown(Widget sender, char keyCode, int modifiers) {
if (keyCode == (char) KEY_ENTER) {
previewPanel.hide();
amountBox.setText(widget.reformatContent());
} else if (keyCode != (char) KEY_TAB) {
previewPanel.show();
}
previewTimer.schedule(100);
}
});
}
}