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When Steve Jobs announced some of the features of Leopard at last year's WWDC, he suggested that some of its features were being kept secret to prevent competitors from copying them. An obvious alternative explanation was that they weren't done yet, but the cynical suggested that there might be nothing new to reveal. One year later, Jobs took the wrap off the new user interface of Leopard and revealed that it does contain a number of new features.老域名购买

For a Mac user, the interface not only involves both the windows and widgets that define the interfaces for most applications, but it also includes the primary applications for interacting with the computer and its files, such as the Dock and Finder. Pretty much all of these are getting a major overhaul in Leopard.

For the general interface, brushed metal has now joined OS 9 in the coffin—it's officially dead. In 10.5, all windows will have a single, consistent appearance. Also changing in appearance is the main menu bar, which will now have a slightly transparent look. The desktop will have new tools for managing the clutter that tends to accumulate there.

The Finder has also gotten a major overhaul and will adopt many conventions of iTunes, which is arguably the most successful software Apple's ever written. This includes a Coverflow-like view of folder contents, with large icons and basic information appearing in a rapidly scrolling list. The icons are large enough to act as previews and can include controls for playing movies or scrolling through a multi-page document.

Dynamic previewing of content appears in a number of other places. In addition to a basic preview, all files can be viewed via a "Quicklook," which essentially performs a full-screen preview of the file contents. Quicklook will include filters that display Word, Excel, PDF, Pages, and Keynote files, among others, and developers can build their own. Folder icons will also dynamically update to reflect their contents.

The Finder's sidebar has also received an update: it will now include icons that take you to a list of shared content and collections of smart searches. Those searches generated via Spotlight, which will now work on shared volumes as well. Apple is also adding a new sharing feature that leverages .Mac connections, allowing any two computers with access to use .Mac to set up peer-to-peer sharing anywhere on the Internet.

The Dock has been updated, adopting a smoother, more angular appearance. Folders in the Dock now act as "Stacks" that display their contents across the entire screen when activated. This allows users to dive into the folder hierarchy or use the stack to rapidly launch programs and documents.

Although most of these changes are evolutionary, they certainly weren't necessarily predictable and haven't leaked in the year since Jobs' last Leopard demo, so they certainly seem to fit the bill in terms of secret features. Some of them appear to be both well executed and useful. Determining whether they actually amount to a worthwhile fix for the many problems with the Finder will have to wait for some extended use.


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