SYSGUI Drawing - Introduction

Drawing in a SYSGUI Window

SYSGUI windows may display not only GUI controls, but also drawn or plotted objects, including lines, arrows, bitmaps, shapes, etc. All such drawing is done in the DRAWING coordinate system.

Controls always appear in front of any drawn items, and will never scroll with the drawing surface, be cleared, or be otherwise altered by any drawing command. Imagine that the CONTROL coordinate system is laid on top of the DRAWING coordinate system. Each has its own set of coordinates and commands, but drawn items can only be seen when not obscured by controls. Note that group boxes are not transparent.