diff options
Diffstat (limited to 'lib/python/Components/Element.py')
| -rw-r--r-- | lib/python/Components/Element.py | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/lib/python/Components/Element.py b/lib/python/Components/Element.py index 12218466..019155c6 100644 --- a/lib/python/Components/Element.py +++ b/lib/python/Components/Element.py @@ -4,7 +4,7 @@ from Tools.CList import CList # Render Converter Converter Source # a bidirectional connection -class Element: +class Element(object): CHANGED_DEFAULT = 0 # initial "pull" state CHANGED_ALL = 1 # really everything changed CHANGED_CLEAR = 2 # we're expecting a real update soon. don't bother polling NOW, but clear data. @@ -15,6 +15,7 @@ class Element: self.downstream_elements = CList() self.master = None self.source = None + self.__suspended = True self.clearCache() def connectDownstream(self, downstream): @@ -61,3 +62,22 @@ class Element: def clearCache(self): self.cache = None + + def setSuspend(self, suspended): + changed = self.__suspended != suspended + if not self.__suspended and suspended: + self.doSuspend(1) + elif self.__suspended and not suspended: + self.doSuspend(0) + + self.__suspended = suspended + if self.source is not None and changed: + self.source.checkSuspend() + + suspended = property(lambda self: self.__suspended, setSuspend) + + def checkSuspend(self): + self.suspended = reduce(lambda x, y: x and y.__suspended, self.downstream_elements, True) + + def doSuspend(self, suspend): + pass |