[sysprof/wip/visualizers] window: update zoom reset label to display current zoom

[Christian Hergert <chergert src gnome org>]

commit 60e917a5d13e261cbf8d905296e526df82816337
Author: Christian Hergert <chergert redhat com>
Date:   Wed Sep 28 18:06:33 2016 -0700

    window: update zoom reset label to display current zoom

 src/resources/ui/sp-window.ui |    8 +++++++-
 src/sp-window.c               |   19 +++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletions(-)
---
diff --git a/src/resources/ui/sp-window.ui b/src/resources/ui/sp-window.ui
index f95a93a..86e14e9 100644
--- a/src/resources/ui/sp-window.ui
+++ b/src/resources/ui/sp-window.ui
@@ -215,6 +215,7 @@
         <property name="visible">true</property>
         <child>
           <object class="GtkBox">
+            <property name="hexpand">true</property>
             <property name="orientation">horizontal</property>
             <property name="margin-bottom">12</property>
             <property name="visible">true</property>
@@ -240,8 +241,13 @@
             <child>
               <object class="GtkButton">
                 <property name="action-name">zoom.zoom-one</property>
-                <property name="label" translatable="yes">100%</property>
                 <property name="visible">true</property>
+                <child>
+                  <object class="GtkLabel" id="zoom_one_label">
+                    <property name="width-chars">5</property>
+                    <property name="visible">true</property>
+                  </object>
+                </child>
               </object>
             </child>
             <child>
diff --git a/src/sp-window.c b/src/sp-window.c
index f1840a1..93e011c 100644
--- a/src/sp-window.c
+++ b/src/sp-window.c
@@ -18,6 +18,7 @@
 
 #include <errno.h>
 #include <glib/gi18n.h>
+#include <math.h>
 #include <sysprof.h>
 #include <sysprof-ui.h>
 
@@ -52,6 +53,7 @@ struct _SpWindow
   GtkStack             *view_stack;
   SpVisualizerView     *visualizers;
   SpZoomManager        *zoom_manager;
+  GtkLabel             *zoom_one_label;
 
   guint                 stats_handler;
 
@@ -715,6 +717,17 @@ sp_window_reset_paned (SpWindow *self)
   gtk_paned_set_position (self->paned, MAX (min_height, MIN (nat_height, 300)));
 }
 
+static gboolean
+zoom_level_to_string (GBinding     *binding,
+                      const GValue *from_value,
+                      GValue       *to_value,
+                      gpointer      user_data)
+{
+  gdouble percent = 100.0 * g_value_get_double (from_value);
+  g_value_take_string (to_value, g_strdup_printf ("%u%%", (guint)ceil (percent)));
+  return TRUE;
+}
+
 static void
 sp_window_destroy (GtkWidget *widget)
 {
@@ -786,6 +799,8 @@ sp_window_class_init (SpWindowClass *klass)
   gtk_widget_class_bind_template_child (widget_class, SpWindow, title);
   gtk_widget_class_bind_template_child (widget_class, SpWindow, view_stack);
   gtk_widget_class_bind_template_child (widget_class, SpWindow, visualizers);
+  gtk_widget_class_bind_template_child (widget_class, SpWindow, zoom_manager);
+  gtk_widget_class_bind_template_child (widget_class, SpWindow, zoom_one_label);
 }
 
 static void
@@ -834,6 +849,10 @@ sp_window_init (SpWindow *self)
                            self,
                            G_CONNECT_SWAPPED);
 
+  g_object_bind_property_full (self->zoom_manager, "zoom", self->zoom_one_label, "label",
+                               G_BINDING_SYNC_CREATE,
+                               zoom_level_to_string, NULL, NULL, NULL);
+
   /*
    * Setup actions for the window.
    */