Sugar-api-doc: Difference between revisions
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[http://wiki.laptop.org/go/Sugar_Almanac This page has been moved to a new location] |
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{{Sugar Almanac TOC}} |
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= How do I get additional help beyond this almanac? = |
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* Looking to get started with the basics of sugar development? Check out Christoph Derndorfer's [http://www.olpcaustria.org/mediawiki/index.php/Activity_handbook Activity Handbook]. |
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Now, on to the actual almanac ... |
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= Package: sugar.activity = |
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* [[sugar.activity.activity]] |
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= Package: sugar.graphics = |
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* [[sugar.graphics.toolbutton]] |
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* [[sugar.graphics.toolbox]] |
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= Package: sugar.datastore = |
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* [[sugar.datastore.datastore]] |
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= MISCELLANEOUS = |
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The tasks below are random useful techniques that have come up as I write code and documentation for this reference. They have yet to be categorized, but will be as a sufficient set of related entries are written. |
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=== How do I write to a log in my activity code? === |
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Sugar uses [http://www.onlamp.com/pub/a/python/2005/06/02/logging.html python's standard logging]. The following code shows how to output something at the debug log level. |
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import logging |
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_logger = logging.getLogger('annotate-activity') |
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... |
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_logger.debug('starting activity') |
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=== How do I ensure that a text string is correctly translated to another language when appropriate (for internationalization)? === |
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To ensure that string output from your activity is correctly translated, you would use the gettext utility. The code below imports gettext, renaming it as '_' for code brevity. Then, whenever there is a string that you want to make sure is translated based on language settings, you simply pass it to the _() function. |
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from gettext import gettext as _ |
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... |
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#Make sure 'hello world' translates |
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print _('hello world') |
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=== How do I know when my activity is "active" or not? === |
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You can set an event using the VISIBILITY_NOTIFY_MASK constant in order to know when your activity changes visibility. Then in the callback for this event, you simply compare the event's state to gtk-defined variables for activity visibility. See [http://www.pygtk.org/docs/pygtk/gdk-constants.html#gdk-visibility-state-constants GDK Visibility State Constants] of gtk.gdk.Constants for more information. |
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<pre> |
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#Notify when the visibility state changes by calling self._visibleNotifyCb |
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#(PUT THIS IN YOUR ACTIVITY CODE - EG. THE __init__() METHOD) |
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self.add_events(gtk.gdk.VISIBILITY_NOTIFY_MASK) |
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self.connect("visibility-notify-event", self._visibleNotifyCb) |
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... |
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#Callback method for when the activity's visibility changes |
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def _visibleNotifyCb(self, widget, event): |
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if (event.state == gtk.gdk.VISIBILITY_FULLY_OBSCURED): |
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print "I am not visible" |
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elif (event.state == gtk.gdk.VISIBILITY_UNOBSCURED): |
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print "I am visible" |
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</pre> |
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= Notes = |
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* See also [[Sugar Code Snippets]] |
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<references /> |
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