From 1557c715e461d5a7deb04bb008c6497441351bbe Mon Sep 17 00:00:00 2001
From: Felix Domke <tmbinc@elitedvb.net>
Date: Sun, 30 Jul 2006 22:56:43 +0000
Subject: some minor speedups using caches and more selective updating

---
 lib/python/Components/Renderer/Label.py         | 9 ++++++---
 lib/python/Components/Renderer/PositionGauge.py | 9 ++++++---
 lib/python/Components/Renderer/Progress.py      | 6 +++++-
 3 files changed, 17 insertions(+), 7 deletions(-)

(limited to 'lib/python/Components/Renderer')

diff --git a/lib/python/Components/Renderer/Label.py b/lib/python/Components/Renderer/Label.py
index 1d06a214..3813ce21 100644
--- a/lib/python/Components/Renderer/Label.py
+++ b/lib/python/Components/Renderer/Label.py
@@ -12,7 +12,10 @@ class Label(VariableText, Renderer):
 
 	def connect(self, source):
 		Renderer.connect(self, source)
-		self.changed()
+		self.changed((self.CHANGED_DEFAULT,))
 
-	def changed(self):
-		self.text = self.source.text
+	def changed(self, what):
+		if what[0] == self.CHANGED_CLEAR:
+			self.text = ""
+		else:
+			self.text = self.source.text
diff --git a/lib/python/Components/Renderer/PositionGauge.py b/lib/python/Components/Renderer/PositionGauge.py
index abc9b7ff..4b49501f 100644
--- a/lib/python/Components/Renderer/PositionGauge.py
+++ b/lib/python/Components/Renderer/PositionGauge.py
@@ -11,12 +11,15 @@ class PositionGauge(Renderer):
 	GUI_WIDGET = ePositionGauge
 	
 	def postWidgetCreate(self, instance):
-		self.changed()
+		self.changed((self.CHANGED_DEFAULT,))
 		self.cutlist_changed()
 		instance.setInOutList(self.__cutlist)
 
-	def changed(self):
-		(self.length, self.position) = (self.source.length or 0, self.source.position or 0)
+	def changed(self, what):
+		if what[0] == self.CHANGED_CLEAR:
+			(self.length, self.position) = 0
+		else:
+			(self.length, self.position) = (self.source.length or 0, self.source.position or 0)
 
 	def cutlist_changed(self):
 		self.cutlist = self.source.cutlist or [ ]
diff --git a/lib/python/Components/Renderer/Progress.py b/lib/python/Components/Renderer/Progress.py
index b6f2b1c8..f32802e4 100644
--- a/lib/python/Components/Renderer/Progress.py
+++ b/lib/python/Components/Renderer/Progress.py
@@ -12,7 +12,11 @@ class Progress(VariableValue, Renderer):
 
 	GUI_WIDGET = eSlider
 
-	def changed(self):
+	def changed(self, what):
+		if what[0] == self.CHANGED_CLEAR:
+			(self.range, self.value) = ((0, 1), 0)
+			return
+
 		range = self.source.range or 100
 		value = self.source.value
 		if value is None:
-- 
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