HP 3000 Manuals HP 3000 Manuals
Communicating with HP ALLBASE/4GL The remainder of this chapter describes the use of the terminal keyboard, but before you look at this in detail, the next few paragraphs provide an overview of the way HP ALLBASE/4GL uses screens. HP ALLBASE/4GL Screens HP ALLBASE/4GL uses two distinctly different types of screens. These are called menus and data screens. Menus Menus allow you to select various options or facilities in HP ALLBASE/4GL. While HP ALLBASE/4GL is displaying a menu, you can use the terminal keyboard to select items from the menu, and then request HP ALLBASE/4GL to execute the selected item. Making HP ALLBASE/4GL execute a selected menu item is referred to as activating the item. Data Screens HP ALLBASE/4GL data screens allow you to enter and edit data. In general, data screens have at least one data input field. You can use the terminal keyboard to enter data into the input fields on data screens, or edit data in these fields. Data screens can also have display-only fields. These fields display system or application information. You cannot change the information displayed in these fields. Data screens in HP ALLBASE/4GL may use windows. A window is a supplementary screen that is overlaid on the data screen. The window can contain further data input or display-only fields. Data screens may also use a scroll area to display lists of information. As each new line of information is displayed, the existing lines of information may be scrolled upwards or downwards on the screen.