push down initial 'changed' event

1 files changed, 24 insertions, 0 deletions

diff --git a/lib/python/Components/Converter/StringListSelection.py b/lib/python/Components/Converter/StringListSelection.py
new file mode 100644
index 00000000..747a82a6
--- /dev/null
+++ b/lib/python/Components/Converter/StringListSelection.py
@@ -0,0 +1,24 @@
+from Components.Converter.Converter import Converter
+from Components.Element import cached
+
+class StringListSelection(Converter, object):
+	"extracts the first element of a the current string list  element for displaying it on LCD"
+	def __init__(self, args):
+		Converter.__init__(self, args)
+
+	def selChanged(self):
+		self.downstream_elements.changed((self.CHANGED_ALL, 0))
+
+	@cached
+	def getText(self):
+		cur = self.source.current
+		if cur and len(cur):
+			return cur[0]
+		return None
+
+	text = property(getText)
+
+	def changed(self, what):
+		if what[0] == self.CHANGED_DEFAULT:
+			self.source.onSelectionChanged.append(self.selChanged)
+		Converter.changed(self, what)