GridDay: add event, not button (#897)

DRY and make Grid more agnostic of widget creation

Author: danirabbit

src/Grid/Grid.vala

@@ -216,8 +216,7 @@ public class Grid : Gtk.Grid {
     public void add_event (ECal.Component event) {
         foreach (var grid_day in data.values) {
             if (Calendar.Util.ecalcomponent_is_on_day (event, grid_day.date)) {
-                var button = new EventButton (event);
-                grid_day.add_event_button (button);
+                grid_day.add_event (event);
             }
         }
     }
@@ -239,8 +238,7 @@ public class Grid : Gtk.Grid {
         foreach (var grid_day in data.values) {
             if (Calendar.Util.ecalcomponent_is_on_day (event, grid_day.date)) {
                 if (!grid_day.update_event (event)) {
-                    var button = new EventButton (event);
-                    grid_day.add_event_button (button);
+                    grid_day.add_event (event);
                 }
             } else {
                 grid_day.remove_event (event);

src/Grid/GridDay.vala

@@ -109,7 +109,9 @@ public class Maya.View.GridDay : Gtk.EventBox {
         calmodel.update_event (src, comp, ECal.ObjModType.ALL);
     }
 
-    public void add_event_button (EventButton button) {
+    public void add_event (ECal.Component component) {
+        var button = new EventButton (component);
+
         string uid = button.get_uid ();
         lock (event_buttons) {
             event_buttons.remove (uid);