[planner] Allow scrolling in Gantt timeline and resource usage (fixes #604355)

[Alexandre Franke <afranke src gnome org>]

commit 170f10cfdcd806abcc7861f8e1757370d62e06e3
Author: Caolan McNamara <caolanm redhat com>
Date:   Mon Oct 18 16:57:50 2010 +0200

    Allow scrolling in Gantt timeline and resource usage (fixes #604355)

 src/planner-gantt-view.c |    5 ++++-
 src/planner-usage-view.c |    6 +++++-
 2 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/src/planner-gantt-view.c b/src/planner-gantt-view.c
index e031c74..8d47944 100644
--- a/src/planner-gantt-view.c
+++ b/src/planner-gantt-view.c
@@ -205,6 +205,7 @@ G_DEFINE_TYPE (PlannerGanttView, planner_gantt_view, PLANNER_TYPE_VIEW);
 static gboolean
 gantt_view_chart_scroll_event (GtkWidget * gki, GdkEventScroll * event, PlannerGanttView *view)
 {
+	gboolean dontpropagate = FALSE;
 	gboolean can_in, can_out;
 	PlannerGanttViewPriv *priv;
 
@@ -213,11 +214,13 @@ gantt_view_chart_scroll_event (GtkWidget * gki, GdkEventScroll * event, PlannerG
 		planner_gantt_chart_can_zoom (PLANNER_GANTT_CHART (priv->gantt), &can_in, &can_out);
 		switch (event->direction) {
 			case GDK_SCROLL_UP: {
+				dontpropagate = TRUE;
 				if (can_in)
 					gantt_view_zoom_in_cb  (NULL, view);
 				break;
 			}
 			case GDK_SCROLL_DOWN:
+				dontpropagate = TRUE;
 				if (can_out)
 					gantt_view_zoom_out_cb  (NULL, view);
 			        break;
@@ -226,7 +229,7 @@ gantt_view_chart_scroll_event (GtkWidget * gki, GdkEventScroll * event, PlannerG
 		}
 	}
 
-	return TRUE;
+	return dontpropagate;
 }
 
 static void
diff --git a/src/planner-usage-view.c b/src/planner-usage-view.c
index 5c17222..c170faa 100644
--- a/src/planner-usage-view.c
+++ b/src/planner-usage-view.c
@@ -124,6 +124,8 @@ G_DEFINE_TYPE (PlannerUsageView, planner_usage_view, PLANNER_TYPE_VIEW);
 static gboolean
 usage_view_chart_scroll_event (GtkWidget * gki, GdkEventScroll * event, PlannerView *view)
 {
+	gboolean dontpropagate = FALSE;
+
 	gboolean can_in, can_out;
 	PlannerUsageViewPriv *priv;
 
@@ -132,11 +134,13 @@ usage_view_chart_scroll_event (GtkWidget * gki, GdkEventScroll * event, PlannerV
 		planner_usage_chart_can_zoom (priv->chart, &can_in, &can_out);
 		switch (event->direction) {
       			case GDK_SCROLL_UP: {
+				dontpropagate = TRUE;
 				if (can_in)
 					usage_view_zoom_in_cb  (NULL, view);
 	        		break;
 			}
 			case GDK_SCROLL_DOWN:
+				dontpropagate = TRUE;
 				if (can_out)
 					usage_view_zoom_out_cb  (NULL, view);
 			        break;
@@ -145,7 +149,7 @@ usage_view_chart_scroll_event (GtkWidget * gki, GdkEventScroll * event, PlannerV
 		}
     	}
 
-	return TRUE;
+	return dontpropagate;
 }