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adjusting documentation for the view predicates

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This commit is contained in:
Danny Yoo 2011-08-31 17:52:47 -04:00
parent 2cc5ab5c28
commit eacc559bf1
3 changed files with 73 additions and 9 deletions
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30
js-assembler/runtime-src/baselib-srclocs.js Normal file
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@ -0,0 +1,30 @@
(function(baselib) {
'use strict';
var exports = {};
baselib.srclocs = exports;
// (define-struct srcloc (source line column position span))
var srcloc = baselib.structs.makeStructureType(
'srcloc', false, 5, 0, false, false);
var makeSrcloc = srcloc.constructor;
var isSrcloc = srcloc.predicate;
var srclocSource = function(x) { return srcloc.accessor(x, 0); }
var srclocLine = function(x) { return srcloc.accessor(x, 1); }
var srclocColumn = function(x) { return srcloc.accessor(x, 2); }
var srclocPosition = function(x) { return srcloc.accessor(x, 3); }
var srclocSpan = function(x) { return srcloc.accessor(x, 4); }
//////////////////////////////////////////////////////////////////////
exports.makeSrcloc = makeSrcloc;
exports.isSrcloc = isSrcloc;
exports.srclocSource = srclocSource;
exports.srclocColumn = srclocColumn;
exports.srclocPosition = srclocPosition;
exports.srclocSpan = srclocSpan;
}(this.plt.baselib))

39
scribblings/cs19.scrbl
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@ -357,32 +357,55 @@ moment.
}
Once we have a view, we can refocus the view to different elements by using
@racket[view-left], @racket[view-right], @racket[view-up], and @racket[view-down].
@defproc[(view-left? [v view]) boolean]{
See if the view can be moved to the previous sibling.
}
@defproc[(view-left [v view]) view]{
Move the focus to the previous sibling.
}
@defproc[(view-right? [v view]) boolean]{
See if the view can be moved to the next sibling.
}
@defproc[(view-right [v view]) view]{
Move the focus to the next sibling.}
@defproc[(view-up? [v view]) boolean]{
See if the view can be moved to the parent.
}
@defproc[(view-up [v view]) view]{
Move the focus to the parent.}
@defproc[(view-down? [v view]) boolean]{
See if the view can be moved to the first child.
}
@defproc[(view-down [v view]) view]{
Move the view to the first child.}
Once we focus the view on an element, we can bind a world handler to it that
responds to events.
@defproc[(view-bind [v view] [type string] [world-updater ([w world] [v view] [e event]? -> world)]) view]{
Attach a world-updating event to the focus. When the world-updater is
called, the view will be focused on the element that triggered the
event. Common event types include @racket["click"],
@racket["mouseenter"], @racket["change"].}
When the view is on an element that we'd like to query or update, we can use
several functions:
@defproc[(view-text [v view]) string]{
Get the textual content at the focus.
}
@defproc[(update-view-text [v view] [s string]) view]{
Update the textual content at the focus.}
@defproc[(view-bind [v view] [type string] [world-updater ([w world] [v view] [e event]? -> world)]) view]{
Attach a world-updating event to the focus.
Attach a world-updating event to the focus. When the world-updater is
called, the view will be focused on the element that triggered the
event.
Common event types include @racket["click"], @racket["mouseenter"], @racket["change"].}
@defproc[(view-show [v view]) view]{
Show the element at the focus.

13
scribblings/manual.scrbl
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@ -743,15 +743,26 @@ moment.
}
@defproc[(view-left? [v view]) boolean]{
See if the view can be moved to the previous sibling.
}
@defproc[(view-left [v view]) view]{
Move the focus to the previous sibling.
}
@defproc[(view-right? [v view]) boolean]{
See if the view can be moved to the next sibling.
}
@defproc[(view-right [v view]) view]{
Move the focus to the next sibling.}
@defproc[(view-up? [v view]) boolean]{
See if the view can be moved to the parent.
}
@defproc[(view-up [v view]) view]{
Move the focus to the parent.}
@defproc[(view-down? [v view]) boolean]{
See if the view can be moved to the first child.
}
@defproc[(view-down [v view]) view]{
Move the view to the first child.}