UI Framework-1: Browser Window

2021-06-27 13:07

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The frame is the portion of the browser window that includes the title bar, sizing borders, and other areas traditionally known as the "non-client" areas in Windows terminology. We supply a frame (called BrowserFrame) that subclasses the views::Widget class that adds some additional handling on Vista for DWM adjustments behind the TabStrip, etc.

On Windows Vista, we only use the glass mode when desktop compositing is enabled; in Classic or Vista Basic modes we use the XP Luna mode. Because the user is able to toggle the compositing on and off by changing Windows themes, we need to be able to dynamically change frame mode. For more information about how this is done in views, see the views::Widget documentation. The browser window provides two NonClientFrameView subclasses - GlassBrowserFrameView and OpaqueBrowserFrameView which are swapped in the BrowserFrame‘s NonClientView when DWM is toggled.


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