[pitivi] previewers: Force waveforms redraw when height changes

[Alexandru Băluț <alexbalut src gnome org>]

commit 223a4c12ce18ddfe76fe5df296dbb726195c334a
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Wed Nov 9 12:34:19 2016 +0100

    previewers: Force waveforms redraw when height changes
    
    Fixes https://phabricator.freedesktop.org/T7612
    
    Reviewed-by: Thibault Saunier <tsaunier gnome org>
    Differential Revision: https://phabricator.freedesktop.org/D1462

 pitivi/timeline/previewers.py |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/pitivi/timeline/previewers.py b/pitivi/timeline/previewers.py
index 5212044..c1975ef 100644
--- a/pitivi/timeline/previewers.py
+++ b/pitivi/timeline/previewers.py
@@ -964,9 +964,13 @@ class AudioPreviewer(Previewer, Zoomable, Loggable):
 
         self._force_redraw = True
 
-        self.ges_elem.connect("notify::in-point", self._inpointChangedCb)
+        self.ges_elem.connect("notify::in-point", self._inpoint_changed_cb)
+        self.connect("notify::height-request", self._height_changed_cb)
+
+    def _inpoint_changed_cb(self, unused_b_element, unused_value):
+        self._force_redraw = True
 
-    def _inpointChangedCb(self, unused_b_element, unused_value):
+    def _height_changed_cb(self, unused_widget, unused_param_spec):
         self._force_redraw = True
 
     def startLevelsDiscoveryWhenIdle(self):