Input functions

GDDM-GKS V1R1 Programming Guide and Reference

Input functions

GDDM-GKS V1R1 Programming Guide and Reference
SC33-0334-00

GDDM-GKS supports six input classes for interactive graphics programs: locator, valuator, choice, pick, stroke, and string. A logical input device is an abstract device that delivers input data to your application program, based on one of the six input classes.

You initialize a logical input device in GKS by establishing an initial value, a prompt and echo type, an echo area, and an initial data record for the device. There is a function for initializing each input class. There are default values for all these parameters, and no initialization is necessary unless the defaults must be changed.

Subtopics:

2.2.6.1 Input classes
2.2.6.2 Input modes
2.2.6.3 Prompt and echo types

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