Extending GWT
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GWT is a free and open source framework that allows developers to create complex JavaScript front-end applications using Java. It handles cross-browser issues and supports features like OOP designs, reusable UI components, localization, and mixing native JavaScript with Java code. GWT provides UiBinder for binding UI components using an HTML-like markup language at compile time. Alternatively, some companies define UI bindings at runtime using XML defined at the server-side with component definitions in XSDs and dynamically generated factory classes. The document provides examples of defining a sample UI component and binding.
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- 2. Google web toolkit • Free and open source • Great to create complex javascript front-end apps • Write javascripts in java :) • Debug AJAX apps in your favorite IDE
- 3. So, what’s cool there • OOP designs • Dynamic and reusable UI components • Simple RPC mechanism • GWT handles some cross-browser issues • Support for localization • Mix native JavaScript in the Java code
- 4. GWT Dynamic UI? • GWT provides UiBinder • Use HTML-like markup language to bind components • Binding happens at compile time :O <ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder' xmlns:g='urn:import:com.google.gwt.user.client.ui'> <g:HTMLPanel> Hello, <g:ListBox ui:field='listBox' visibleItemCount='1'/>. </g:HTMLPanel> </ui:UiBinder>
- 5. Our way • UI bindings at run time B) • Bindings defined in XML at serverside • Components definitions via XSDs • Factory classes can be dynamically generated
- 6. Some internal stuff <xsd:complexType name="LayoutContainer"><xsd:complexContent> <xsd:extension base="Component"> <xsd:attribute name="DefaultWidth" type="xsd:int" default="200"/> </xsd:complexContent></xsd:complexType> A Sample UI Component Definition <Component xsi:type="LayoutContainer" Id="FormId1" Layout="form"> <Component xsi:type="LabelField" Id="FreeTextSearchFieldLabel“ /> <Component xsi:type="Button" Id="ClearSearchOn" Text=“clear“ /> </Component> A Sample UI Binding
- 7. Want to see a small demo?
- 8. Thank you :) www.99XTechnology.com Say hello to us: info@99x.lk