Graphics text

GDDM V3R2 Base Application Programming Guide

Graphics text

GDDM V3R2 Base Application Programming Guide
SC33-0867-01

This is the simplest set of functions. The caption on the house in Figure 1 in topic 1.4 is in graphics text. It was created simply by executing a GSCHAR call for the line on which it appears.

The primary purpose of graphics text is to annotate graphics displays. It is also used when maximum control over the appearance of text is required, for instance, when preparing presentation material, such as overhead projection transparencies or slides.

The location of the text is specified in world coordinates, and it can be positioned to pixel accuracy. The application program can specify its size, angle, and direction. Characters can be proportionally spaced. Large and complex symbols can be displayed, as well as characters.

On most types of terminal, graphics text is output only. On 3270-PC/G and /GX workstations, and on 5080 and 6090 Graphics Systems, graphics text functions can be used for input, that is, for reading data from the terminal, but they are suitable for obtaining only small amounts of data. The input functions, like the output functions, are intended primarily for use in a graphics context, for instance, to enable the terminal user to enter parameters concerning a picture currently on display.

Graphics text is supported on all devices except alphanumerics-only terminals and printers.

For more information about graphics-text output, see "Creating graphics-text output in your application" in topic 4.0. For information on receiving graphics-text input, see "Writing interactive graphics applications" in topic 11.0.

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