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Diffstat (limited to 'src/com/itmill/toolkit/demo/features/FeatureServerEvents.java')
| -rw-r--r-- | src/com/itmill/toolkit/demo/features/FeatureServerEvents.java | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/src/com/itmill/toolkit/demo/features/FeatureServerEvents.java b/src/com/itmill/toolkit/demo/features/FeatureServerEvents.java deleted file mode 100644 index cdf371a91d..0000000000 --- a/src/com/itmill/toolkit/demo/features/FeatureServerEvents.java +++ /dev/null @@ -1,132 +0,0 @@ -/* ************************************************************************* - - IT Mill Toolkit - - Development of Browser User Intarfaces Made Easy - - Copyright (C) 2000-2006 IT Mill Ltd - - ************************************************************************* - - This product is distributed under commercial license that can be found - from the product package on license/license.txt. Use of this product might - require purchasing a commercial license from IT Mill Ltd. For guidelines - on usage, see license/licensing-guidelines.html - - ************************************************************************* - - For more information, contact: - - IT Mill Ltd phone: +358 2 4802 7180 - Ruukinkatu 2-4 fax: +358 2 4802 7181 - 20540, Turku email: info@itmill.com - Finland company www: www.itmill.com - - Primary source for information and releases: www.itmill.com - - ********************************************************************** */ - -package com.itmill.toolkit.demo.features; - -import java.net.MalformedURLException; -import java.net.URL; - -import com.itmill.toolkit.terminal.ExternalResource; -import com.itmill.toolkit.ui.*; - -public class FeatureServerEvents extends Feature { - - protected String getTitle() { - return "Server Events"; - } - - protected Component getDemoComponent() { - OrderedLayout l = new OrderedLayout(); - - l.addComponent( - new Label( - "<h3>Multiplayer GO-Game</h3><p>For demonstration, see GO-Game example application. The application implements a " - + "multi-player board game, where the moved by one player are immediately reflected to " - + "another player.</p>" - + "<p>Updating another players screen is totally automatic, and the programmed " - + "does not need to be avare when the refresh requests are sent to screen by the server. In " - + "web adapter the requests are passed through open HTTP-connection as java-script fragments " - + "that update the windows that need repainting.</p>", - Label.CONTENT_UIDL)); - - URL goUrl = null; - try { - goUrl = new URL(getApplication().getURL(), "../go/"); - } catch (MalformedURLException e) { - } - - if (goUrl != null) { - Link link = new Link("Start GO-Game", new ExternalResource(goUrl)); - link.setTargetName("gogame"); - link.setTargetBorder(Link.TARGET_BORDER_NONE); - l.addComponent(link); - } - - l.addComponent( - new Label( - "<h3>Chat example</h3><p>For some purposes it might be better to create your own "+ - "stream. The easiest way of creating a continuous stream for "+ - "simple purposes is to use StreamResource-class. See chat "+ - "example below, how this technique can be used for creation "+ - "of simple chat program.</p>", - Label.CONTENT_UIDL)); - - URL chatUrl = null; - try { - chatUrl = new URL(getApplication().getURL(), "../chat/"); - } catch (MalformedURLException e) { - } - - if (goUrl != null) { - Link link = new Link("Start chat", new ExternalResource(chatUrl)); - link.setTargetName("chat"); - link.setTargetBorder(Link.TARGET_BORDER_NONE); - l.addComponent(link); - } - - return l; - } - - protected String getDescriptionXHTML() { - return "<p>Millstone component framework supports both transactional and " - + "continuous terminals. This means that either the events from the " - + "terminal are sent together as transactions or the events are " - + "passed immediately when the user initiates them through the user " - + "interface. </p>" - + "<p>WebAdapter converts the Millstone applications to web-environment " - + "by transferring the events as HTTP-parameters and drawing the " - + "pages after the components have received and handled the events. " - + "In the web-environment the web browser is always the active party that " - + "starts the transaction. This is problematic when the server should " - + "notify the user about changes without HTTP-request initiated by the " - + "user.</p>" - + "<h3>WebAdapter Solution</h3>" - + "<p>Millstone solves the problem by combining component frameworks " - + "ability to automatically notify terminal adapter about all visual " - + "changes to HTTP-protocols ability to handle very long and slow " - + "page downloads. WebAdapter provides the web browser with " - + "possibility to keep special server command stream open all the time. " - + "All the visual updates that happen in components causes the " - + "WebAdapter to automatically creates JavaScript that updates the " - + "corresponding web browser window and to send the script immediately " - + "to browser for execution.</p>" - + "<p>The mechanism is fairly complicated, but using the mechanism in " - + "any Millstone application is trivial. Application just needs " - + "to make sure that WebBrowser opens a hidden iframe to location: " - + "<code>?SERVER_COMMANDS=1</code>.</p>" - + "<p>See the example of the usage on Demo-tab to get better understanding " - + "of the mechanism. If you read the example's source code, you will notice that " - + "the program does not contain any support for sending events to client, as " - + "it is completely automatic.</p>"; - } - - protected String getImage() { - return "serverevents.jpg"; - } - -} |