6.3.90.900
Staged Slides
| (require slideshow/staged-slide) | package: staged-slide |
This library provides helpers for creating stages slides that provide more flexibility than Slideshow’s build-in slide.
syntax
(staged [name ...] body ...)
Executes the body terms once for each stage name. The terms
may include expressions and mutually recursive definitions. Within the body,
each name is bound to a number from 1 to the number of stages
in order. Furthermore, during execution stage is bound to the number
of the current stage and stage-name is bound to a symbol representing
the name of the current stage. By comparing stage to the
numeric value of each name, or stage-name to quoted symbols of
the form 'name, the user may compute based on the progression of the
stages.
syntax
syntax
These keywords are bound during the execution of staged and should not
be used otherwise.
syntax
(slide/staged [name ...] arg ...)
Within a staged slide, the boolean arguments to hide, show, and others can be used to determine in which stages to perform a transformation. The macros pict-if, pict-cond, and pict-case, may also be used to create images which change naturally between stages.
syntax
(at name ...)
Returns #t if the current stage is one of name.
syntax
(before name)
Returns #t if the current stage is before name.
syntax
(before/at name)
Returns #t if the current stage is before name or is name.
syntax
(at/after name)
Returns #t if the current stage is after name or is name.
syntax
(after name)
Returns #t if the current stage is after name.
Returns #t if the current stage is before or after name.