calendars-page: Use switch to toggle visibility

data/ui/calendar-row.ui

@@ -53,6 +53,22 @@
             <property name="top_attach">0</property>
           </packing>
         </child>
+
+        <!-- Visibility switch -->
+        <child>
+          <object class="GtkSwitch" id="switch">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="hexpand">True</property>
+            <property name="halign">end</property>
+            <property name="valign">center</property>
+          </object>
+          <packing>
+            <property name="left_attach">2</property>
+            <property name="top_attach">0</property>
+            <property name="height">2</property>
+          </packing>
+        </child>
       </object>
     </child>
   </object>

src/gui/calendar-management/gcal-calendars-page.c

@@ -79,6 +79,7 @@ make_calendar_row (GcalCalendarsPage *self,
   GtkWidget *top_label;
   GtkWidget *icon;
   GtkWidget *row;
+  GtkWidget *sw;
 
   manager = gcal_context_get_manager (self->context);
   get_source_parent_name_color (manager, gcal_calendar_get_source (calendar), &parent_name, NULL);
@@ -113,6 +114,10 @@ make_calendar_row (GcalCalendarsPage *self,
                            icon,
                            0);
 
+  /* visibility switch */
+  sw = GTK_WIDGET (gtk_builder_get_object (builder, "switch"));
+  g_object_bind_property (calendar, "visible", sw, "active", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
+
   /* parent source name label */
   bottom_label = GTK_WIDGET (gtk_builder_get_object (builder, "subtitle"));
   gtk_label_set_label (GTK_LABEL (bottom_label), parent_name);