prevent button1/2 clicks on pixfaders from being used to drive event processing in parent containers (#5272)

git-svn-id: svn://localhost/ardour2/branches/3.0@13868 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 2 insertions, 1 deletions

diff --git a/libs/gtkmm2ext/pixfader.cc b/libs/gtkmm2ext/pixfader.cc
index 8b52fbbf23..6c4a511ae1 100644
--- a/libs/gtkmm2ext/pixfader.cc
+++ b/libs/gtkmm2ext/pixfader.cc
@@ -362,7 +362,7 @@ PixFader::on_button_release_event (GdkEventButton* ev)
 					adjustment.set_value (adjustment.get_value() - adjustment.get_step_increment());
 				}
 			}
-
+			return true;
 		} 
 		break;
 		
@@ -372,6 +372,7 @@ PixFader::on_button_release_event (GdkEventButton* ev)
 			dragging = false;
 			set_adjustment_from_event (ev);
 			gdk_pointer_ungrab (GDK_CURRENT_TIME);
+			return true;
 		}
 		break;