Developing with Ext GWT: Enterprise RIA Development by Grant Slender

By Grant Slender

Developing in Ext GWT is a fast–paced, sensible consultant to quick studying the initiatives important in construction enterprise–class wealthy net purposes. dependent round the interesting new UI library from Ajax leaders Ext JS and the newest GWT liberate, this publication takes the reader via setup, the on hand widgets, and complex customized widgets and templates, and concludes with a useful pattern client–server software in lower than one hundred fifty pages. now not your commonplace beginner's consultant to programming, this booklet presents a speedy method of turning into powerful with best advertisement RIA instruments and libraries.

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Developing with Ext GWT 49 Chapter 4: Advanced Widgets and Stuff Let’s turn up the gas and jump into some more advanced (and exciting) features of GXT: Layouts, Forms, Portal, and Drag-n-Drop. Layout managers are probably one of the most important features of GXT to learn. As layout managers translate code into a visual arrangement of widgets, it is critical that you provide the correct instructions and hints so that GXT can position and size widgets in the places you intended. Forms and their associated widgets are a fundamental part of any application, and so GXT has a good helping of Form widgets and components to make your applications look very tasty.

Start simple: Rather than continuously adding more complexity to a large user interface layout, start with individual containers, get the layout correct for each, and then add them as working parts. This will ensure that layout errors are not bleeding into each other. ƒ Nest layouts: Sometimes the easiest solution to a complex layout problem is to nest layouts together. For example, rather than trying to work out how to force a single container’s layout to behave in some complex manner, just add two LayoutContainers.

Hide() again. The hide won’t be stopped because the listener was removed. ”. Listing 3-8. Window Close, AreYouSure? show(); In addition to confirm, MessageBox also has alert, which displays a single OK button and a read-only message alerting the user, and prompt, which provides a text field for user input along with OK and Cancel buttons. Optionally, you can also show a multiline prompt that uses a text field to obtain more than a single line of text from the user. Developing with Ext GWT 31 TabPanel and TabItem A tabbed panel is now a popular user interface used within browsers.

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