[PATCH 4/5] perf gtk/hists: Add a double-click handler for callchains

[Namhyung Kim <namhyung@kernel.org>]

From: Namhyung Kim <namhyung.kim@lge.com>

If callchain is displayed, add "row-activated" signal handler for
handling double-click or pressing ENTER key action.

Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/ui/gtk/hists.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tools/perf/ui/gtk/hists.c b/tools/perf/ui/gtk/hists.c
index 34a09c09748c..4e96f7a9f6d1 100644
--- a/tools/perf/ui/gtk/hists.c
+++ b/tools/perf/ui/gtk/hists.c
@@ -175,6 +175,18 @@ static void perf_gtk__add_callchain(struct rb_root *root, GtkTreeStore *store,
 	}
 }
 
+static void on_row_activated(GtkTreeView *view, GtkTreePath *path,
+			     GtkTreeViewColumn *col __maybe_unused,
+			     gpointer user_data __maybe_unused)
+{
+	bool expanded = gtk_tree_view_row_expanded(view, path);
+
+	if (expanded)
+		gtk_tree_view_collapse_row(view, path);
+	else
+		gtk_tree_view_expand_row(view, path, FALSE);
+}
+
 static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,
 				 float min_pcnt)
 {
@@ -315,6 +327,8 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,
 		}
 	}
 
+	g_signal_connect(view, "row-activated",
+			 G_CALLBACK(on_row_activated), NULL);
 	gtk_container_add(GTK_CONTAINER(window), view);
 }
 
-- 
1.7.11.7