Java tutorial
/** * Sencha GXT 4.0.0 - Sencha for GWT * Copyright (c) 2006-2015, Sencha Inc. * * licensing@sencha.com * http://www.sencha.com/products/gxt/license/ * * ================================================================================ * Open Source License * ================================================================================ * This version of Sencha GXT is licensed under the terms of the Open Source GPL v3 * license. You may use this license only if you are prepared to distribute and * share the source code of your application under the GPL v3 license: * http://www.gnu.org/licenses/gpl.html * * If you are NOT prepared to distribute and share the source code of your * application under the GPL v3 license, other commercial and oem licenses * are available for an alternate download of Sencha GXT. * * Please see the Sencha GXT Licensing page at: * http://www.sencha.com/products/gxt/license/ * * For clarification or additional options, please contact: * licensing@sencha.com * ================================================================================ * * * ================================================================================ * Disclaimer * ================================================================================ * THIS SOFTWARE IS DISTRIBUTED "AS-IS" WITHOUT ANY WARRANTIES, CONDITIONS AND * REPRESENTATIONS WHETHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE * IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY, MERCHANTABLE QUALITY, * FITNESS FOR A PARTICULAR PURPOSE, DURABILITY, NON-INFRINGEMENT, PERFORMANCE AND * THOSE ARISING BY STATUTE OR FROM CUSTOM OR USAGE OF TRADE OR COURSE OF DEALING. * ================================================================================ */ package com.sencha.gxt.widget.core.client.box; import com.google.gwt.core.client.GWT; import com.google.gwt.resources.client.ClientBundle; import com.google.gwt.resources.client.ImageResource; import com.google.gwt.safehtml.shared.SafeHtml; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; import com.google.gwt.safehtml.shared.SafeHtmlUtils; import com.sencha.gxt.core.client.dom.XElement; import com.sencha.gxt.core.client.util.IconHelper; import com.sencha.gxt.widget.core.client.Dialog; import com.sencha.gxt.widget.core.client.HasIcon; import com.sencha.gxt.widget.core.client.container.BoxLayoutContainer.BoxLayoutPack; /** * Custom <code>Dialog</code> for displaying information to the user. * <p/> * <p> * Note that the <code>MessageBox</code> is asynchronous. Unlike a regular * JavaScript <code>alert</code> (which will halt browser execution), showing a * MessageBox will not cause the code to stop. * </p> */ public class MessageBox extends Dialog implements HasIcon { @SuppressWarnings("javadoc") public interface MessageBoxIcons extends ClientBundle { ImageResource error(); ImageResource info(); ImageResource question(); ImageResource warning(); } @SuppressWarnings("javadoc") public interface MessageBoxAppearance { XElement getContentElement(XElement parent); XElement getIconElement(XElement parent); XElement getMessageElement(XElement parent); void render(SafeHtmlBuilder sb); } /** * The basic icons used to decorate the message box. */ public static MessageBoxIcons ICONS = GWT.create(MessageBoxIcons.class); protected ImageResource icon; private final MessageBoxAppearance messageBoxAppearance; /** * Creates a message box with the specified heading text. * * @param headingText the text to display for the message box heading. */ public MessageBox(String headingText) { this(SafeHtmlUtils.fromString(headingText), SafeHtmlUtils.EMPTY_SAFE_HTML); } /** * Creates a message box with the specified heading text. * * @param headingHtml the html to display for the message box heading */ public MessageBox(SafeHtml headingHtml) { this(headingHtml, SafeHtmlUtils.EMPTY_SAFE_HTML); } /** * Creates a message box with the specified heading and message text. * * @param headingText the text to display for the message box heading * @param messageText the text to display in the message box */ public MessageBox(String headingText, String messageText) { this(SafeHtmlUtils.fromString(headingText), SafeHtmlUtils.fromString(messageText), GWT.<WindowAppearance>create(WindowAppearance.class), GWT.<MessageBoxAppearance>create(MessageBoxAppearance.class)); } /** * Creates a message box with the default message box appearance and the * specified heading and message HTML. * * @param headingHtml the HTML to display for the message box heading * @param messageHtml the HTML to display in the message box */ public MessageBox(SafeHtml headingHtml, SafeHtml messageHtml) { this(headingHtml, messageHtml, GWT.<WindowAppearance>create(WindowAppearance.class), GWT.<MessageBoxAppearance>create(MessageBoxAppearance.class)); } /** * Creates a message box with the specified heading HTML, message HTML and * windowAppearance. It is the caller's responsibility to ensure the HTML is CSS * safe. * * @param headingHtml the HTML to display for the message box heading * @param messageHtml the HTML to display in the message box * @param windowAppearance the message box window windowAppearance * @param messageBoxAppearance the message box content windowAppearance */ public MessageBox(SafeHtml headingHtml, SafeHtml messageHtml, WindowAppearance windowAppearance, MessageBoxAppearance messageBoxAppearance) { super(windowAppearance); setMinWidth(300); this.messageBoxAppearance = messageBoxAppearance; setHeading(headingHtml); setBlinkModal(true); init(); SafeHtmlBuilder sb = new SafeHtmlBuilder(); messageBoxAppearance.render(sb); windowAppearance.getContentElem(getElement()).setInnerSafeHtml(sb.toSafeHtml()); messageBoxAppearance.getMessageElement(getElement()).setId(getId() + "-content"); setMessage(messageHtml); } @Override public ImageResource getIcon() { return icon; } /** * Returns the message box appearance. * * @return the message box appearance */ public MessageBoxAppearance getMessageBoxAppearance() { return messageBoxAppearance; } @Override public void setIcon(ImageResource icon) { this.icon = icon; messageBoxAppearance.getIconElement(getElement()).setVisible(true); messageBoxAppearance.getIconElement(getElement()).removeChildren(); messageBoxAppearance.getIconElement(getElement()).appendChild(IconHelper.getElement(icon)); } /** * Sets the message. HTML in the message is escaped. * Use {@link #setMessage(SafeHtml)} to display HTML. * * @param message the message */ public void setMessage(String message) { if (message == null) { setMessage(SafeHtmlUtils.EMPTY_SAFE_HTML); } else { setMessage(SafeHtmlUtils.fromString(message)); } } /** * Sets the message. * * @param message the message */ public void setMessage(SafeHtml message) { if (message == null) { messageBoxAppearance.getMessageElement(getElement()).setInnerSafeHtml(SafeHtmlUtils.EMPTY_SAFE_HTML); } else { messageBoxAppearance.getMessageElement(getElement()).setInnerSafeHtml(message); } } @Override protected void onResize(int width, int height) { super.onResize(width, height); resizeContents(); } @Override public void show() { super.show(); // Set the field default width to 100% resizeContents(); } /** * Resize contents on {@link #show()} and {@link #onResize(int, int)} */ protected void resizeContents() { } private void init() { setData("messageBox", true); setResizable(false); setConstrain(true); setMinimizable(false); setMaximizable(false); setClosable(false); setModal(true); setButtonAlign(BoxLayoutPack.CENTER); setMinHeight(80); setPredefinedButtons(PredefinedButton.OK); setHideOnButtonClick(true); } }