[pitivi: 5/6] previewer: add cache size configuration option, se

[Edward Hervey <edwardrv src gnome org>]

commit 491d35b75d3e56da98413ab11e06ed75e8ef1a55
Author: Brandon Lewis <brandon_lewis berkeley edu>
Date:   Fri Mar 6 18:48:41 2009 -0800

    previewer: add cache size configuration option, set a reasonable default
---
 pitivi/previewer.py |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/pitivi/previewer.py b/pitivi/previewer.py
index d48d8b5..f4c4e5c 100644
--- a/pitivi/previewer.py
+++ b/pitivi/previewer.py
@@ -47,6 +47,14 @@ GlobalSettings.addConfigOption("thumbnailSpacingHint",
     section="thumbnailing",
     key="spacing-hint",
     default=2.0)
+# this default works out to a maximum of ~ 1.78 MiB per factory, assuming:
+# 4:3 aspect ratio
+# 4 bytes per pixel
+# 50 pixel height
+GlobalSettings.addConfigOption("thumbnailCacheSize",
+    section="thumbnailing",
+    key="cache-size",
+    default=250)
 
 # Previewer                      -- abstract base class with public interface for UI
 # |_DefaultPreviewer             -- draws a default thumbnail for UI
@@ -126,7 +134,8 @@ class RandomAccessPreviewer(Previewer):
     def __init__(self, factory, stream_):
         Previewer.__init__(self, factory, stream_)
         self._queue = []
-        self._cache = ThumbnailCache(size=100)
+        self._cache = ThumbnailCache(size=
+            instance.PiTiVi.settings.thumbnailCacheSize)
 
         # FIXME:
         # why doesn't this work?