perf ui gtk: Implement helpline_fns

Add helpline API implementation to GTK front-end.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1345104894-14205-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Makefile

@@ -600,6 +600,7 @@ else
 		LIB_OBJS += $(OUTPUT)ui/gtk/browser.o
 		LIB_OBJS += $(OUTPUT)ui/gtk/setup.o
 		LIB_OBJS += $(OUTPUT)ui/gtk/util.o
+		LIB_OBJS += $(OUTPUT)ui/gtk/helpline.o
 		# Make sure that it'd be included only once.
 		ifneq ($(findstring -DNO_NEWT_SUPPORT,$(BASIC_CFLAGS)),)
 			LIB_OBJS += $(OUTPUT)ui/setup.o

tools/perf/ui/gtk/gtk.h

@@ -29,6 +29,8 @@ static inline bool perf_gtk__is_active_context(struct perf_gtk_context *ctx)
 struct perf_gtk_context *perf_gtk__activate_context(GtkWidget *window);
 int perf_gtk__deactivate_context(struct perf_gtk_context **ctx);
 
+void perf_gtk__init_helpline(void);
+
 #ifndef HAVE_GTK_INFO_BAR
 static inline GtkWidget *perf_gtk__setup_info_bar(void)
 {

tools/perf/ui/gtk/helpline.c

@@ -0,0 +1,30 @@
+#include "gtk.h"
+#include "../helpline.h"
+
+static void gtk_helpline_pop(void)
+{
+	if (!perf_gtk__is_active_context(pgctx))
+		return;
+
+	gtk_statusbar_pop(GTK_STATUSBAR(pgctx->statbar),
+			  pgctx->statbar_ctx_id);
+}
+
+static void gtk_helpline_push(const char *msg)
+{
+	if (!perf_gtk__is_active_context(pgctx))
+		return;
+
+	gtk_statusbar_push(GTK_STATUSBAR(pgctx->statbar),
+			   pgctx->statbar_ctx_id, msg);
+}
+
+static struct ui_helpline gtk_helpline_fns = {
+	.pop	= gtk_helpline_pop,
+	.push	= gtk_helpline_push,
+};
+
+void perf_gtk__init_helpline(void)
+{
+	helpline_fns = &gtk_helpline_fns;
+}

tools/perf/ui/gtk/setup.c

@@ -7,6 +7,7 @@ extern struct perf_error_ops perf_gtk_eops;
 int perf_gtk__init(void)
 {
 	perf_error__register(&perf_gtk_eops);
+	perf_gtk__init_helpline();
 	return gtk_init_check(NULL, NULL) ? 0 : -1;
 }