calls-new-call-box: Allow entering of "+" symbol

Use the "number" property of the dial pad for the dialed number which
takes care of cycling buttons. While we're at it, also make the clear
button external to the number entry box, enlarging it and turning it
into a backspace button.

Closes #12

src/calls-new-call-box.c

@@ -36,7 +36,9 @@ struct _CallsNewCallBox
 
   GtkListStore *origin_store;
   GtkComboBox *origin_box;
-  GtkSearchEntry *number_entry;
+  GtkEntry *number_entry;
+  GtkButton *backspace;
+  HdyDialer *dial_pad;
   GtkButton *dial;
   GtkLabel *status;
 
@@ -84,22 +86,40 @@ get_origin (CallsNewCallBox *self)
 
 
 static void
-dial_pad_symbol_clicked_cb (CallsNewCallBox *self,
-                            gchar            symbol,
-                            HdyDialer       *dialer)
+backspace_clicked_cb (CallsNewCallBox *self)
 {
-  calls_entry_append (GTK_ENTRY (self->number_entry), symbol);
+  const gchar *old;
+  size_t len;
+  gchar *new;
+
+  old = hdy_dialer_get_number (self->dial_pad);
+  g_assert (old != NULL);
+
+  len = strlen (old);
+  if (len == 0)
+    {
+      return;
+    }
+
+  new = g_strndup (old, strlen (old) - 1);
+  hdy_dialer_set_number (self->dial_pad, new);
+  g_free (new);
 }
 
 
 static void
-dial_pad_deleted_cb (CallsNewCallBox *self,
-                     HdyDialer       *dialer)
+dial_pad_notify_number_cb (CallsNewCallBox *self,
+                           GParamSpec      *pspec,
+                           GObject         *gobject)
 {
-  GtkEntryBuffer *buf = gtk_entry_get_buffer (GTK_ENTRY (self->number_entry));
-  guint len = gtk_entry_buffer_get_length (buf);
+  const gchar *number;
 
-  gtk_entry_buffer_delete_text (buf, len - 1, 1);
+  g_assert (strcmp(g_param_spec_get_name (pspec), "number") == 0);
+
+  number = hdy_dialer_get_number (self->dial_pad);
+  gtk_entry_set_text (self->number_entry, number);
+  gtk_widget_set_visible (GTK_WIDGET (self->backspace),
+                          strlen (number) > 0);
 }
 
 
@@ -308,10 +328,27 @@ calls_new_call_box_init (CallsNewCallBox *self)
 }
 
 
+static void
+constructed (GObject *object)
+{
+  GObjectClass *parent_class = g_type_class_peek (G_TYPE_OBJECT);
+  CallsNewCallBox *self = CALLS_NEW_CALL_BOX (object);
+  PangoAttrList *attrs;
+
+  // Increase the size of the number entry text
+  attrs = pango_attr_list_new ();
+  pango_attr_list_insert (attrs, pango_attr_scale_new (1.2));
+  gtk_entry_set_attributes (self->number_entry, attrs);
+  pango_attr_list_unref (attrs);
+
+  parent_class->constructed (object);
+}
+
+
 static void
 dispose (GObject *object)
 {
-  GObjectClass *parent_class = g_type_class_peek (GTK_TYPE_BOX);
+  GObjectClass *parent_class = g_type_class_peek (G_TYPE_OBJECT);
   CallsNewCallBox *self = CALLS_NEW_CALL_BOX (object);
 
   clear_dial_queue (self);
@@ -332,6 +369,7 @@ calls_new_call_box_class_init (CallsNewCallBoxClass *klass)
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
   object_class->set_property = set_property;
+  object_class->constructed = constructed;
   object_class->dispose = dispose;
 
 
@@ -349,11 +387,13 @@ calls_new_call_box_class_init (CallsNewCallBoxClass *klass)
   gtk_widget_class_bind_template_child (widget_class, CallsNewCallBox, origin_store);
   gtk_widget_class_bind_template_child (widget_class, CallsNewCallBox, origin_box);
   gtk_widget_class_bind_template_child (widget_class, CallsNewCallBox, number_entry);
+  gtk_widget_class_bind_template_child (widget_class, CallsNewCallBox, backspace);
+  gtk_widget_class_bind_template_child (widget_class, CallsNewCallBox, dial_pad);
   gtk_widget_class_bind_template_child (widget_class, CallsNewCallBox, dial);
   gtk_widget_class_bind_template_child (widget_class, CallsNewCallBox, status);
   gtk_widget_class_bind_template_callback (widget_class, dial_clicked_cb);
-  gtk_widget_class_bind_template_callback (widget_class, dial_pad_deleted_cb);
-  gtk_widget_class_bind_template_callback (widget_class, dial_pad_symbol_clicked_cb);
+  gtk_widget_class_bind_template_callback (widget_class, dial_pad_notify_number_cb);
+  gtk_widget_class_bind_template_callback (widget_class, backspace_clicked_cb);
 }