[tasks] Only use tooltips if the GTK+ supports it

[Ross Burton <rburton src gnome org>]

commit ae4eaae5157c9727309b0c3ca73ad66769581d8b
Author: Ross Burton <ross linux intel com>
Date:   Thu Apr 23 18:49:34 2009 +0100

    Only use tooltips if the GTK+ supports it
---
 configure.ac             |    4 ++++
 libkoto/koto-task-view.c |    4 ++++
 2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index ddbca9f..cd9f3a5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -98,6 +98,10 @@ AM_CONDITIONAL(HAVE_GREGEX, test "x$have_regex" = "xyes")
 AC_CHECK_DECLS([GDK_WINDOW_TYPE_HINT_COMBO, gtk_style_lookup_color],
                [], [], [#include <gtk/gtk.h>])
 
+# This was introduced in GTK+ 2.12
+AC_CHECK_DECLS([gtk_widget_set_has_tooltip],
+               [], [], [#include <gtk/gtk.h>])
+
 # This was introduced in GTK+ 2.14
 AC_CHECK_DECLS([gtk_show_uri],
                [], [], [#include <gtk/gtk.h>])
diff --git a/libkoto/koto-task-view.c b/libkoto/koto-task-view.c
index c182bdc..e93b7eb 100644
--- a/libkoto/koto-task-view.c
+++ b/libkoto/koto-task-view.c
@@ -263,6 +263,7 @@ on_note_activated (KotoCellRendererPixbuf *cell, const char *path, GtkTreeView *
   }
 }
 
+#if HAVE_DECL_GTK_WIDGET_SET_HAS_TOOLTIP
 static gboolean
 on_query_tooltip (GtkWidget *widget,
                   int x, int y,
@@ -309,6 +310,7 @@ on_query_tooltip (GtkWidget *widget,
 
   return ret;
 }
+#endif
 
 /*
  * Object methods.
@@ -517,8 +519,10 @@ koto_task_view_init (KotoTaskView *self)
   
   gtk_tree_view_append_column (treeview, column);
 
+#if HAVE_DECL_GTK_WIDGET_SET_HAS_TOOLTIP
   gtk_widget_set_has_tooltip (GTK_WIDGET (treeview), TRUE);
   g_signal_connect (treeview, "query-tooltip", G_CALLBACK (on_query_tooltip), NULL);
+#endif
 }