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Professional Plone Development: Building robust, content-centric web applications with Plone 3, an open source Content Management System by Martin Aspeli

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Managing Viewlets

Plone 3 uses viewlets to manage various standard page elements, such the logo, the navigation breadcrumbs, and the personal bar. Viewlets are registered to a viewlet manager, which controls which viewlets are displayed, and in which order they are rendered.

Note

If you want to learn more about how viewlets are implemented, see the interfaces, and documentation in the zope.viewlet package. We will cover viewlets in more detail in Chapters 9 and 11.

To see which viewlet managers and viewlets are used to compose a page, append /@@manage-viewlets to a URL.

Note

Note that this only works with viewlet managers based on the plone.app.viewletmanager package. All of Plone’s viewlet managers use this, but third-party products may come with ...

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