4.2 Drawing Ruled Lines in a DECterm Window

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Programming guides for video terminals discuss how you use ANSI escape sequences to perform operations, such as inserting and deleting characters, inserting and removing blank lines, and requesting character display in double height and width. Because a DECterm window is a terminal emulator, these escape sequences also apply to programs that display text and graphics in a DECterm window.

Digital UNIX enhancements for Asian languages include additional escape sequences for drawing and removing ruled lines in a specified area of a DECterm window. These additional escape sequences allow applications to construct tables and diagrams. The feature is a market requirement for Japanese terminals but has been incorporated into DECterm software for all terminal types.

The following sections describe the escape sequences that draw and erase lines according to pattern and area parameters.

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Topics:

• 4.2.1 Drawing Ruled Lines in a Pattern
• 4.2.2 Erasing Ruled Lines in a Pattern
• 4.2.3 Erasing All Ruled Lines in an Area
• 4.2.4 Interaction of Ruled Lines and Other DECterm Escape Sequences
• 4.2.5 Determining if the DECterm Device Setting Supports Ruled Lines

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