Dan wrote:
> Hello SIMILE enthusiasts-
> I've got some data that stores time values as epoch seconds, and I'd
> like to load this data into Exhibit. I've done a bit of poking around
> the code, and it looks like the time parsing and storage functions are
> in a few different places.
>
> I'd like to write something that will be ready for inclusion into the
> code base, so am requesting suggestions from this group to get
> started:
>
> How is time stored in Exhibit? In particular, I'm working with the
> Timeplot extension.
>
> Is it as simple as creating two functions to translate between epoch
> seconds and Exhibit's time storage format?
>
> Which files and functions are involved?
>
This is the file
http://api.simile-widgets.org/exhibit/2.2.0/extensions/timeplot/scripts/timeplot-view.js
Look for
Exhibit.TimeplotView.prototype._reconstruct
[1] For time series, look for
idx = SimileAjax.DateTime.parseIso8601DateTime(seriesTime[i]).getTime();
[2] For discrete events, look for
self._getTime(itemID, database, function(v) { time = v; return true; });
_getTime is created in
Exhibit.TimeplotView._configure
from accessors.getTime, which in turn was created from the second element in
Exhibit.TimeplotView._accessorSpecs
Note
type: "date"
Exhibit.TimeplotView._accessorSpecs is passed into the functions in
http://api.simile-widgets.org/exhibit/2.2.0/scripts/util/settings.js
and type:"date" ultimately causes
Exhibit.SettingsUtilities._typeToParser to choose
Exhibit.SettingsUtilities._dateParser, which calls
SimileAjax.DateTime.parseIso8601DateTime to parse strings into
Javascript Date objects. If you set
Exhibit.TimeplotView._accessorSpecs[1].type = "text";
then those string values will be left as-is, and you can do your own
parsing by overriding Exhibit.TimeplotView._configure
<script>
Exhibit.TimeplotView._configure = function(view, configuration) {
Exhibit.SettingsUtilities.createAccessors(configuration,
Exhibit.TimeplotView._accessorSpecs, view._accessors);
Exhibit.SettingsUtilities.collectSettings(configuration,
Exhibit.TimeplotView._settingSpecs, view._settings);
var accessors = view._accessors;
view._getTime = function(itemID, database, visitor) {
accessors.getProxy(itemID, database, function(proxy) {
accessors.getTime(proxy, database, function(v) {
var v2 = // parse v yourself
visitor(v2);
});
});
};
};
</script>
David
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