asp.net mvc read barcode Figure 8-2: The Gnome Help system in Software

Printer QR-Code in Software Figure 8-2: The Gnome Help system

Figure 8-2: The Gnome Help system
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The Gnome Desktop
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The Gnome desktop provides you with all the capabilities of GUI-based operating systems (see Figure 8-3). You can drag files, applications, and directories to the desktop, and then back to Gnome-compliant applications. If the desktop stops functioning, you can restart it by starting the Gnome file manager (Nautilus). The desktop is actually a backend process in the Gnome file manager. But you needn't have the file manager open to use the desktop. The Gnome 1.4 desktop with Nautilus is described in this section.
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Figure 8-3: The Gnome 1.4 desktop Although the Gnome desktop supports drag-and-drop operations, these work only for applications that are Gnome-compliant. You can drag any items from a Gnome-compliant application to your desktop, and vice versa. Any icon for an item that you drag from a file manager window to the desktop also appears on the desktop. However, the default drag-anddrop operation is a move operation. If you select a file in your file manager window and drag it to the desktop, you are actually moving the file from its current directory to the Gnome desktop directory, which is located in your home directory and holds all items on the desktop (notice this is a dot file). For Gnome 1.2, the desktop directory is .gnome-desktop. In the case of dragging directory folders to the desktop, the entire directory and its subdirectories would be copied to the Gnome desktop directory. In most cases, you only want to create on the desktop another way to access a file without moving it from its original directory. You can do this by creating a link or a program launcher, instead of moving the file. To create a link, click and drag the file while holding down the SHIFT key. A copy of the icon then appears with a small arrow in the right corner indicating it is a link. You can then click this link to start the program, open the file, or open the directory, depending on what kind of file you linked to. You can then use that icon to access the item directly. This is often used for starting common programs. For example, you can SHIFT-click and drag the Netscape icon to the desktop to create a Link icon for Netscape. Double-clicking the icon starts Netscape. You can do the same with files. In this case, their respective program is started. If the item is a directory, the file manager starts up opened to that directory. If you want to have an application placed on your desktop that is not Gnome-compliant, you can manually place a link in your home directory's Gnome desktop directory. You can also copy a file to your desktop by clicking-and-dragging it from a file manager window to your desktop, and then pressing the CTRL key before you release the left mouse button. You will see the small arrow in the upper right-hand corner of the copied icon change to a + symbol, indicating that your are creating a copy instead of a link. As an alternative to the desktop, you can drag any program, file, or directory to the panel; a launcher applet is then automatically created for it on the panel. The item is not moved or copied. You can also right-click anywhere on the empty desktop to display a menu. You will
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notice entries for a New Folder. Remember, this entry creates a new directory on your desktop, specifically in the Gnome desktop directory. The entries for this menu are listed in Table 8-1. The desktop also displays icons for any drives you have mounted, such as a CD-ROM or floppy drives, provided they are user mountable. Nautilus automatically mounts CD-ROMs when you insert them into your CD-ROM drive, displaying the CD-ROM icon and opening a Nautilus window displaying the CD-ROM's contents. You can manually mount a CD-ROM or floppy disk by right-clicking anywhere on the desktop to display the desktop menu and then selecting the CD-ROM or Floppy entry in the Disks menu. An icon for that device will appear with the name of the CD-ROM or floppy disk. You can then access the disk in the CD-ROM drive either by double-clicking it or rightclicking and selecting the Open entry. A file manager window opens to display the contents of the CD-ROM disk. To unmount a CD-ROM, right-click the CD-ROM icon and select the Unmount entry. The CD-ROM disk is automatically ejected. The same procedure works for floppy disks, using the Floppy Disk icon. Be sure you don't remove a mounted floppy disk until you have first unmounted it, selecting the Unmount entry in the pop-up menu. Usually a window manager extends a desktop into several areas that appear as different screens. Gnome's drag-and-drop operation works on desktop areas provided by a Gnomecompliant window manager. Gnome does not directly manage desktop areas, though you can use the Gnome pager to move to them. You use the window manager configuration tool to configure them-in this case Sawfish, which is the default window manager for Gnome used in Red Hat. In addition, most window managers, including Sawfish, also support virtual desktops. Instead of being extensions of the same desktop area, virtual desktops are separate entities. The Gnome pager on the Panel supports virtual desktops, creating icons for each in the panel, along with task buttons for any applications open on them. You can use the Gnome pager to move to different virtual desktops and their areas.
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