8.4 JSR 168 Portlet window states
Window state determines how much space the portlet will have to render its content. The portlet container will provide the current window state to the portlet to allow the portlet the display the appropriate content. JSR 168 supports three Window states, NORMAL, MAXIMIZED, and MINIMIZED.
Like portlet mode the Window state can be programmatically changed in processAction() while processing an action request. The state can also be requested while creating a render or action URL.
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