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This is a custom Vaadin UIProvider. It gets the MagnoliaConfigurationProperties via injection, and checks for property values when queried for widgetset or theme. Vaadin's DefaultUIProvider can only resolve widgetsets and themes either from servlet parameters or via annotation.

Property Most magnolia property keys are mostly defined as constants in the SystemProperty (info.magnolia.cms.core) deprecated  deprecated class. For these new properties, we keep their the keys where we use them, i.e. in the AdmincentralUIProvider.

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For further information about Vaadin client-side development, or about ways to compile the Widgetset,GWT compilation, please refer to the Book of Vaadin, or the GWT project website.

2. Using a custom widgetset in

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Magnolia

Once your widgetset is compiled, you may now tell magnolia to use it by editing your webapp's magnolia properties, and setting the key magnolia.ui.vaadin.widgetset.

The expected value should be the same is a widgetset qualified name as Vaadin expects it, without the .gwt.xml extension, e.g. some.vaadin.package.SomeWidgetset.

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Custom app styles

1. Vaadin themes

Module styles are provided as Vaadin themes, generally using Sass.

Like for any Vaadin application, there can be only one Vaadin theme per Vaadin UI (i.e. Magnolia's AdmincentralUI). Therefore it should include all the other themes you intend to use; in particular it must always include Magnolia's default admincentral theme.

Sass themes offer the advantage of being composed from several other Vaadin themes, through Sass mixins. They are ultimately compiled and served as one big chunk of CSS.

For more information on Vaadin themes or Sass, you may refer to the Book of Vaadin or the Sass website.

2. Using custom styles in your Magnolia app

You can already use custom styles in your Magnolia app, by adding a theme property to your app descriptor, see App theme. However in some cases, you need the styles to be loaded without starting the app (e.g. custom dialog, custom message view).

In that case, once you have your Sass theme ready (includes the admincentralmixin and your custom styles), you may now tell magnolia to use it by editing your webapp's magnolia properties, and setting the key magnolia.ui.vaadin.theme.

The expected value is a theme name as Vaadin expects it, i.e. the name of the theme folder under src/main/resources/VAADIN/themes.---