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visualizer-view: avoid overscroll upon zoom change

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When changing the zoom (zooming out), we could potentially
let the scrollbar be past the end. This looks pretty bad when
the GtkWindow doesn't clip correctly.

This just adjusts things so we push ourselves back into the
visible area.
This commit is contained in:
Christian Hergert
2016-09-30 17:04:48 -07:00
parent e54c496f7d
commit 5c53dd5d6e
1 changed files with 12 additions and 0 deletions
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12
lib/sp-visualizer-view.c
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@ -130,6 +130,9 @@ sp_visualizer_view_notify_zoom (SpVisualizerView *self,
gint64 begin_time = 0.0;
gint64 end_time;
gdouble zoom;
gdouble page_size;
gdouble upper;
gdouble value;
g_assert (SP_IS_VISUALIZER_VIEW (self));
g_assert (SP_IS_ZOOM_MANAGER (zoom_manager));
@ -144,6 +147,15 @@ sp_visualizer_view_notify_zoom (SpVisualizerView *self,
sp_visualizer_view_set_time_range (self, begin_time, end_time);
gtk_adjustment_set_page_size (priv->scroll_adjustment, end_time - begin_time);
g_object_get (priv->scroll_adjustment,
"page-size", &page_size,
"upper", &upper,
"value", &value,
NULL);
if (value + page_size > upper)
gtk_adjustment_set_value (priv->scroll_adjustment, upper - page_size);
if (priv->reader != NULL)
{
gint64 real_range;