GDDM V3R2 Base Application Programming Guide
GDDM V3R2 Base Application Programming Guide
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Writing interactive graphics applications GDDM V3R2 Base Application Programming Guide SC33-0867-01 |
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This topic tells you how to make the screen of a display unit into a drawing pad. It describes GDDM calls and programming techniques that create and manipulate graphics primitives interactively, in response to the demands of the end user. The GDDM facilities for creating graphics are basically the same in interactive graphics applications as in noninteractive ones. In other words, you define graphics attributes and create graphics primitives and segments using the calls introduced in "Example: The HOUSE program" in topic 1.4. Interactive graphics applications differ in the calls they use for handling input from the terminal. These calls help you by letting GDDM do a lot of the work. The GDDM-supported terminals most suitable for interactive graphics are workstations running GDDM-OS/2 Link and the 3270-PC/G and /GX workstations. This topic tells you primarily how to write programs for these. Differences on other types of terminal are described in "Device variations with interactive graphics" in topic 11.14.4. Subtopics:
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