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Understanding Device Installation and Management CHapTER 17
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A context-sensitive right-click menu that also varies depending upon the device selected . For example, you can access the properties for a device by right-clicking the device and selecting Properties . These properties pages are extensible by the device manufacturer, who can add additional tabs and register them for device management and configuration purposes . Note that the default double-click action for the rightclick menu is also configurable . A device metadata system and a set of XML schemas that device vendors can use to customize the way their devices are presented to users in the Devices And Printers folder . For example, Devices And Printers can automatically download additional metadata for a newly connected device to display a photorealistic image of the device and additional manufacturer information that is not available from the hardware or device driver . For more information, see the section titled Device Metadata System later in this chapter . Integration with the new Device Stage feature of Windows 7, which is discussed in the next section of this chapter .
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The Windows 7 computer itself appears as a device within the Devices And Printers folder . As Figure 17-2 illustrates, right-clicking your computer device icon displays a menu of actions that you can perform to configure and manage your computer .
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FIgURE 17-2 The context menu for the computer
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device icon in Devices And Printers
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advanced users can perform even more device configuration tasks, such as rolling
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back drivers, by right-clicking the computer device icon in Devices and printers, selecting System properties, and selecting Device Manager.
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CHapTER 17
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Managing Devices and Services
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Understanding Device Stage
Device Stage is a new, intuitive visual interface for supported devices that makes it easier for users to configure, use, and manage devices connected to their computers . Microsoft is working with IHVs to help them support Device Stage for their devices . Currently, Device Stage is supported by only a small selection of multifunction printers, music players, and mobile phones . Figure 17-3 shows the new UI for a device that supports Device Stage, which shows branding information and various tasks from which the user can choose to use and manage the device . In addition, when the Device Stage UI is open for a device, a photo-realistic shell icon for the device is displayed on the taskbar . Clicking this icon displays a thumbnail preview of the device and of the Device Stage UI for the device .
FIgURE 17-3 An example of the Device Stage user interface for a compatible device
Understanding the Device Experience architecture
Figure 17-4 shows the architecture of the new device experience in Windows 7 . New elements of Windows 7 include:
Two new UIs (the Devices And Printers folder and the Device Stage experience) . Two underlying features (Device Display Object and Device Metadata System) that make the new UIs possible .
The device manufacturer must supply the following for each device:
XML metadata for the device, which includes both Device Stage XML and Device Display XML metadata Vendor applications for using the device, which may be Web applications and/or Windows applications Device drivers for physical layer connectivity with and use of the device
These features of the Windows 7 device experience are described in more detail below .
Understanding Device Installation and Management CHapTER 17
Web Applications
Windows Applications Device Display XML
Windows Features
Device Stage XML Device Stage Windows Shell Portable Device Other classes Partner Software New for Windows 7 Windows Partner Hardware
Devices and Printers
Scanner
Printer
Device Display Object Function Discovery Device Metadata System
Physical Layer (USB, Wi-Fi, Bluetooth, )
FIgURE 17-4 The architecture of the new device experience in Windows 7
DEVICE CONTaINERS
Because of the growing popularity of multifunction devices, such as printer/copier/fax /scanners, the PnP architecture has been enhanced in Windows 7 to support the detecting and grouping together of the different functions that a device supports . This new feature is called device container, a new PnP device property that groups device functions together into a single container representing the physical device . Device containers preserve the existing devnode model of Windows while providing users with a more natural representation of a physical device . (A devnode is an internal structure that represents a device on a system . It contains the device stack and information about whether the device has been started and which drivers have registered for notification on the device . Each device on a computer has a devnode, and these devnodes are organized into a hierarchical device tree . The Plug and Play Manager creates a devnode for a device when the device is configured .) By using device containers, a multifunction device such as a printer/copier/fax/scanner can be presented to the user as a single device icon in the Devices And Printers folder (and also in the Device Stage interface if this is supported by the device) . Device containers are identified by a container ID, which is a globally unique identifier (GUID) that is individual to each physical device . The container ID for a device is generated automatically by PnP . All devnodes belonging to the device container on a given bus share the same container ID .
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