A dynamic segment is a chained segment that possesses special properties. Dynamic segments are those that can be moved or changed in some other way without disturbing the remaining parts of the picture. To draw dynamic segments on the display screen for the first time, use GpiDrawDynamics. GpiDrawDynamics draws every dynamic segment in the segment chain.
When they have been drawn on the display, dynamic segments can be updated. For example, to move one or more dynamic segments to another part of the display screen, remove them from their current position using GpiRemoveDynamics. You can restrict the scope of this function by supplying the names of a start segment and a finish segment. The start segment and finish segment can be the same. Dynamic segments outside of this range are not removed from the display screen.
If you intend to re-associate the presentation space, call GpiRemoveDynamics first; otherwise, GpiRemoveDynamics cannot remove the dynamic segments after the presentation space has been re-associated. The dynamic segments effectively cease to be dynamic.
After removing the appropriate dynamic segments from the display screen, you can redraw them elsewhere, again using GpiDrawDynamics. If you specify a range of dynamic segments in GpiRemoveDynamics, the redrawing is restricted to that range. Note that, when dynamic segments have been drawn on the display screen, you must not edit their definitions in segment store.
Dynamic segments are treated like nondynamic segments when you are directing output to a hardcopy device. GpiRemoveDynamics and GpiDrawDynamics raise an error condition if the current output device is not a display window.