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Chapter 4. Portlet 2.0 API—caching, secu... > Portlet window states in depth
4.4. Portlet window states in depth
In this section, we’ll look at the WindowState class and how to define support for custom window states. We’ll also look at how the Book Catalog portlet makes use of Liferay Portal’s custom pop_up window state to show a printable book catalog with no window decoration.
The window state of a portlet is represented by the Portlet API’s WindowState class. This class defines (as constants) the three standard window states that portlets support: NORMAL, MINIMIZED, and MAXIMIZED.
