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Let activities provide their own implementation of get_preview() #152

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This commit is contained in:
Tomeu Vizoso 2009-02-25 16:09:06 +01:00
parent 607c2a9610
commit 29cc73ae18
1 changed files with 8 additions and 2 deletions
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10
src/sugar/activity/activity.py
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@ -713,8 +713,14 @@ class Activity(Window, gtk.Container):
self._jobject.destroy()
self._jobject = None
def _get_preview(self):
def get_preview(self):
"""Returns an image representing the state of the activity. Generally
this is what the user is seeing in this moment.
Activities can override this method, which should return a str with the
binary content of a png image with a width of 300 and a height of 225
pixels.
"""
if self.canvas is None or not hasattr(self.canvas, 'get_snapshot'):
return None
pixmap = self.canvas.get_snapshot((-1, -1, 0, 0))
@ -770,7 +776,7 @@ class Activity(Window, gtk.Container):
self.metadata['buddies_id'] = cjson.encode(buddies_dict.keys())
self.metadata['buddies'] = cjson.encode(self._get_buddies())
preview = self._get_preview()
preview = self.get_preview()
if preview is not None:
self.metadata['preview'] = dbus.ByteArray(preview)