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→Using Sugar Activities
===Using Karma Templates===
===Using Karma Templates===
===Using Sugar Activities===
===Using Sugar Activities===
There is currently no automated support for creating these lessons. It requires some command-line knowledge.
When a lesson is opened in the edit mode, the file being edited is 'source.txt'. The first line of this file
contains a directive to launch a specific Sugar activity, e.g.,
<!--B:TurtleArt,lines_lesson.ta,application/x-turtle-art-->
For technical reasons, this line appears in the edit mode as:
/*B:TurtleArt,lines_lesson.ta,application/x-turtle-art*/
The source.txt file uses html5 markup in which <!-- and --> enclose a comment. As a result, this line is
not visible in the editor. By converting the markup to /* */, the user can create and edit this line.
The B: is required to signal this comment contains a directive. There are three parts to the directive separated by commas:
#name of the Sugar activity. This is the same as the name in /home/olpc/Activities minus the activity.
So Turtle Art (Blocks) appears as /home/olpc/Activities/TurtleArt.activity.
#file name of the activity bundle (lines_lesson.ta) including the file extension. This bundle must be in
the folder for this lesson in Learn.
#mime_type of the bundle. The mime_type of a bundle is given in /home/olpc/Activities/TurtleArt.activity/activity/activity.info. For 'some.activity', look in /home/olpc/Activities/some.activity/activity/activity.info.
A Sugar activity can be launched as a new start by:
/*B:some.activity*/
The Learn.activity creates a Journal object with the bundle file as data. It then resumes the activity from this Journal object.
The user needs to quit the launched activity when finished to return to the Learn activity. Sugar treats the launched activity as a window opened by Learn and so gets confused if the user tries to return to Learn via the frame.
==Update==
==Update==