perf ui/gtk: Use struct perf_error_ops

Define and use perf_gtk_eops to provide a GTK2 message dialog for error
reporting and a info_bar for warning.

As GtkInfoBar requires recent GTK+ libraries, provides a fallback
implementation using statusbar widget too.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Acked-by: Pekka Enberg <penberg@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/1338265382-6872-8-git-send-email-namhyung@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 91 insertions, 0 deletions

diff --git a/tools/perf/ui/gtk/setup.c b/tools/perf/ui/gtk/setup.c
index 829529957766..92879ce61e2f 100644
--- a/tools/perf/ui/gtk/setup.c
+++ b/tools/perf/ui/gtk/setup.c
@@ -1,12 +1,17 @@
 #include "gtk.h"
 #include "../../util/cache.h"
+#include "../../util/debug.h"
+
+extern struct perf_error_ops perf_gtk_eops;
 
 int perf_gtk__init(void)
 {
+        perf_error__register(&perf_gtk_eops);
         return gtk_init_check(NULL, NULL) ? 0 : -1;
 }
 
 void perf_gtk__exit(bool wait_for_ok __used)
 {
+        perf_error__unregister(&perf_gtk_eops);
         gtk_main_quit();
 }
diff --git a/tools/perf/ui/gtk/util.c b/tools/perf/ui/gtk/util.c
index 6fe13fdc513e..0ead373c0dfb 100644
--- a/tools/perf/ui/gtk/util.c
+++ b/tools/perf/ui/gtk/util.c
@@ -2,6 +2,8 @@
 #include "../../util/debug.h"
 #include "gtk.h"
 
+#include <string.h>
+
 
 struct perf_gtk_context *pgctx;
 
@@ -26,6 +28,90 @@ int perf_gtk__deactivate_context(struct perf_gtk_context **ctx)
         return 0;
 }
 
+static int perf_gtk__error(const char *format, va_list args)
+{
+        char *msg;
+        GtkWidget *dialog;
+
+        if (!perf_gtk__is_active_context(pgctx) ||
+            vasprintf(&msg, format, args) < 0) {
+                fprintf(stderr, "Error:\n");
+                vfprintf(stderr, format, args);
+                fprintf(stderr, "\n");
+                return -1;
+        }
+
+        dialog = gtk_message_dialog_new_with_markup(GTK_WINDOW(pgctx->main_window),
+                                        GTK_DIALOG_DESTROY_WITH_PARENT,
+                                        GTK_MESSAGE_ERROR,
+                                        GTK_BUTTONS_CLOSE,
+                                        "<b>Error</b>\n\n%s", msg);
+        gtk_dialog_run(GTK_DIALOG(dialog));
+
+        gtk_widget_destroy(dialog);
+        free(msg);
+        return 0;
+}
+
+#ifdef HAVE_GTK_INFO_BAR
+static int perf_gtk__warning_info_bar(const char *format, va_list args)
+{
+        char *msg;
+
+        if (!perf_gtk__is_active_context(pgctx) ||
+            vasprintf(&msg, format, args) < 0) {
+                fprintf(stderr, "Warning:\n");
+                vfprintf(stderr, format, args);
+                fprintf(stderr, "\n");
+                return -1;
+        }
+
+        gtk_label_set_text(GTK_LABEL(pgctx->message_label), msg);
+        gtk_info_bar_set_message_type(GTK_INFO_BAR(pgctx->info_bar),
+                                      GTK_MESSAGE_WARNING);
+        gtk_widget_show(pgctx->info_bar);
+
+        free(msg);
+        return 0;
+}
+#else
+static int perf_gtk__warning_statusbar(const char *format, va_list args)
+{
+        char *msg, *p;
+
+        if (!perf_gtk__is_active_context(pgctx) ||
+            vasprintf(&msg, format, args) < 0) {
+                fprintf(stderr, "Warning:\n");
+                vfprintf(stderr, format, args);
+                fprintf(stderr, "\n");
+                return -1;
+        }
+
+        gtk_statusbar_pop(GTK_STATUSBAR(pgctx->statbar),
+                          pgctx->statbar_ctx_id);
+
+        /* Only first line can be displayed */
+        p = strchr(msg, '\n');
+        if (p)
+                *p = '\0';
+
+        gtk_statusbar_push(GTK_STATUSBAR(pgctx->statbar),
+                           pgctx->statbar_ctx_id, msg);
+
+        free(msg);
+        return 0;
+}
+#endif
+
+struct perf_error_ops perf_gtk_eops = {
+        .error          = perf_gtk__error,
+#ifdef HAVE_GTK_INFO_BAR
+        .warning        = perf_gtk__warning_info_bar,
+#else
+        .warning        = perf_gtk__warning_statusbar,
+#endif
+};
+
 /*
  * FIXME: Functions below should be implemented properly.
  *        For now, just add stubs for NO_NEWT=1 build.