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timeline: fix possible lag when dragging on timeline

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I need to idle-aggregate scroll updates, since gtk performs heavy operations in
a synchronous fashion here (ironically, they do that to make scrolling smooth).
This commit is contained in:
René Stadler 2011-09-06 22:27:33 +02:00 committed by Stefan Sauer
parent 1d009ac3c5
commit e46367c073
1 changed files with 26 additions and 3 deletions
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29
debug-viewer/GstDebugViewer/Plugins/Timeline.py
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@ -746,6 +746,9 @@ class AttachedWindow (object):
handler = self.handle_log_view_notify_model handler = self.handle_log_view_notify_model
self.notify_model_id = window.log_view.connect ("notify::model", handler) self.notify_model_id = window.log_view.connect ("notify::model", handler)
self.idle_scroll_path = None
self.idle_scroll_id = None
def detach (self, feature): def detach (self, feature):
self.window.log_view.disconnect (self.notify_model_id) self.window.log_view.disconnect (self.notify_model_id)
@ -759,6 +762,11 @@ class AttachedWindow (object):
self.timeline.destroy () self.timeline.destroy ()
self.timeline = None self.timeline = None
self.idle_scroll_path = None
if self.idle_scroll_id is not None:
gobject.source_remove (self.idle_scroll_id)
self.idle_scroll_id = None
def handle_detach_log_file (self, log_file): def handle_detach_log_file (self, log_file):
self.timeline.clear () self.timeline.clear ()
@ -870,10 +878,25 @@ class AttachedWindow (object):
count = sum (data[:pos + 1]) count = sum (data[:pos + 1])
view = self.window.log_view
model = view.props.model
row = model[count]
path = (count,) path = (count,)
self.idle_scroll_path = path
if self.idle_scroll_id is None:
self.idle_scroll_id = gobject.idle_add (self.idle_scroll)
return False
def idle_scroll (self):
self.idle_scroll_id = None
if self.idle_scroll_path is None:
return False
path = self.idle_scroll_path
self.idle_scroll_path = None
view = self.window.log_view
view.scroll_to_cell (path, use_align = True, row_align = .5) view.scroll_to_cell (path, use_align = True, row_align = .5)
sel = view.get_selection () sel = view.get_selection ()
sel.select_path (path) sel.select_path (path)