![]() Saves time & money: Organizes all classroom device control into a single, reliable button panel allows remote/scheduled control of devices over the network - saving potentially thousands of dollars per year in projector bulb life alone.Allows control of 2 serial, 1 IR, & multiple network devices. Multiple cascading actions can be programmed to trigger on a button press or external event, or simply on a schedule.ĭecora® style single-gang keypad control panel with 8 customizable keys. All we have to do is to attach our components (Java instances) to the HTML tags using a simple tag attribute called wicket:id (we will shortly see how to use it).This simple, 8-button, customizable control panel is independently networkable - the panel alone can provide all the in-room control and remote management power you need. In Wicket we don’t have to take care of generating HTML inside the page itself, and we won’t need to use any tag other than standard HTML tags. This is clearly in contrast with the concept of separation between presentation and business logic and it leads to a more confusing code in our pages. Wicket is just about Java and good old HTML: almost all web frameworks force users to adopt special tags or to use server side code inside HTML markup. Moreover, as any other Apache project, Wicket is developed paying great attention to user feedback and to suggested features. Wicket is a community driven project: The Wicket team supports and promotes the dialogue with the framework’s users through two mailing lists (one for users and another one for framework developers) and an Apache JIRA (the issue tracking system). You don’t have to worry about future licensing changes, Wicket will always be released under Apache license 2.0 and freely available. Wicket is 100% open source: Wicket is a top Apache project and it doesn’t depend on any private company. Wicket has a set of utility classes for unit testing that simulate user interaction with web pages, hence we can write acceptance tests using just JUnit without any other test framework (unit testing is covered in Testing web applications is much easier: since pages and components are pure objects, you can use JUnit to test their behavior and to ensure that they render as expected. We can stop worrying about keeping track of user data stored inside the HttpSession and we can start managing them in a natural and transparent way. They are Java objects and they can keep a state inside them and reference other objects. We don’t have to worry about an application’s state: pages and components can be considered stateful entities. With Wicket we can also apply inheritance to HTML markup in order to build a consistent graphic layout for our applications (we will see markup inheritance in chapter 4.2). They are object instances and we can harness OOP to design web pages and their components. Web pages are objects: web pages are not just text files sent back to the client. Appendix C: Lost In Redirection With Apache Wicket.Creating a Wicket project from scratch and importing it into our favourite IDE Create server specific http/2 push support Avoid interactions with other servlet filters Use the Wicket session only for global data Validators must not change any data or models Do not unwrap models within the constructor hierarchy Implement visibilities of components correctly Configuration of the JUnit based integration test environment Test Driven Development with Wicket and Spring AJAX request attributes and call listeners Generating callback URLs with IRequestListener An example of integration with JavaScript CssHeaderItem and JavaScriptHeaderItem compression Aggregate multiple resources with resource bundles Selecting multiple values with ListMultipleChoices and Palette Working with radio buttons and checkboxes Creating complex form components with FormComponentPanel Submit form with an IFormSubmittingComponent Automatically creating bookmarkable links with tag wicket:link The “director” of request processing - RequestCycle Hiding decorating elements with the wicket:enclosure tag Creating in-line panels with WebMarkupContainer Markup inheritance with the wicket:extend tag Header, footer, left menu, content, etc… Wicket vs the other component oriented frameworks Benefits of component oriented frameworks for web development Component oriented frameworks - an overview
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