7.3.5 Tool
● Basic function
This area is usually used to show informations about the current state of various resources of the system.
The first time you install the system, you will find menu tools installed that show you information about Bluetooth, network, sound, CPU usage, and current time is installed.
7.3.4 Task Bar (Task Display)
● Basic function
This area shows the task currently being performed. The task that is displayed as window on the desktop screen is displayed as an icon to mean the task here.
7.3.3 Application Launch Bar (Start Task)
● Basic function
This area is where icons representing a specific application are collected.
Clicking on a specific icon registered here will immediately launch the application program associated with the icon.
It will be convenient to register and use frequently used applications.
7.3.2 Menu (Start Menu)
7.3.2.1 Execution of Menu
If you press [Menu] on the left side of [Panel] with the mouse, a list of executable program groups is displayed, and below that, a list of actually executable programs is displayed.
7.3 Detail Structure of Panel (Menu and Taskbar)
7.3.1 Configuring Panel
The Raspberry Pi system provides useru with the ability to adjust the configuration, processing capabilities, appearance, and location of the Panel according to user’s needs. If you press the right mouse button anywhere on the panel, a popup menu like the screen below appears. You can use the [Panel Settings] menu to make the necessary settings.
7.2.3 Configuration of Desktop Area
Figure 7‑5 Configuration of window desktop area
■ Desktop
[Desktop] represents the environment in which a particular user is currently working. When a user executes a specific program, it not only displays the execution status of the program in the form of a window, but also receives a command or input from a user, processes the program, and displays the result.
7.2.2 Configuration of Panel Area
Figure 7‑4 Configuration of pannel area
■ Panel
The entire area at the top of the screen is called [Panel]. It can be moved up, down, left, or right according to the user’s setting.
The [Panel] area is usually used to control and coordinate the window. It can shut down or restart the system, and it also starts a specific program or displays the overall status of the system.
This panel can be divided into several areas according to the purpose, and each area can be defined to perform a special function. [Menu], [Application Launch Bar], [Task Bar], [Tool] can be said as used typical area.
7.2 Basic structure of Window
We will first look at the basic structure of the window. In this section, we will briefly review the whole structure, and we will discuss each detail item in a separate chapter.
7.2.1 Start Screen of Window
The next screen is the window start screen that appears when you first start the window.
7.1.3 Differences from Windows of Other Operating System
You already know that in MS Windows or Mac OS systems, almost everything is processed on a window basis. You know that in addition to simple data management tasks handled by ordinary users, system administrators or operators can install a new system, modify the system, or adjust the system settings for the network by using icons or menus provided in the window.
7.1.2 X Windows and LXDE
The X Window System, also known as X11, X, or X-Windows, provides a framework for using the GUI environment on Unix/Linux-based computers. X-Windows works on a client-server basis. The X-server works by communicating with various kinds of client programs. X-serve also exports windows screen and receives and processes user input such as keyboard, mouse, and touch screen.