Add left handed

data/io.elementary.SettingsDaemon.AccountsService.xml

@@ -20,5 +20,9 @@
       <annotation name="org.freedesktop.Accounts.DefaultValue" value="0"/>
     </property>
 
+    <property name="LeftHanded" type="b" access="readwrite">
+      <annotation name="org.freedesktop.Accounts.DefaultValue" value="false"/>
+    </property>
+
   </interface>
 </node>

src/AccountsService.vala

@@ -27,6 +27,7 @@ public interface SettingsDaemon.AccountsService : Object {
 
     public abstract KeyboardLayout[] keyboard_layouts { owned get; set; }
     public abstract uint active_keyboard_layout { get; set; }
+    public abstract bool left_handed { get; set; }
 }
 
 [DBus (name = "io.elementary.pantheon.AccountsService")]

src/Application.vala

@@ -36,6 +36,8 @@ public class SettingsDaemon.Application : GLib.Application {
 
     private Backends.KeyboardSettings keyboard_settings;
 
+    private Backends.MouseSettings mouse_settings;
+
     private Backends.PrefersColorSchemeSettings prefers_color_scheme_settings;
 
     private Backends.Housekeeping housekeeping;
@@ -91,6 +93,7 @@ public class SettingsDaemon.Application : GLib.Application {
 
         if (accounts_service != null) {
             keyboard_settings = new Backends.KeyboardSettings (accounts_service);
+            mouse_settings = new Backends.MouseSettings (accounts_service);
         }
 
         try {

src/Backends/MouseSettings.vala

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2021 elementary, Inc. (https://elementary.io)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA
+ * Authored by: Marius Meisenzahl <[email protected]>
+ */
+
+public class SettingsDaemon.Backends.MouseSettings : GLib.Object {
+    public unowned AccountsService accounts_service { get; construct; }
+
+    private GLib.Settings mouse_settings;
+
+    public MouseSettings (AccountsService accounts_service) {
+        Object (accounts_service: accounts_service);
+    }
+
+    construct {
+        mouse_settings = new GLib.Settings ("org.gnome.desktop.peripherals.mouse");
+
+        if (accounts_service.left_handed != mouse_settings.get_boolean ("left-handed")) {
+            sync_accountsservice_to_gsettings ();
+        }
+
+        sync_gsettings_to_accountsservice ();
+
+        mouse_settings.changed.connect ((key) => {
+            if (key == "left-handed") {
+                sync_gsettings_to_accountsservice ();
+            }
+        });
+    }
+
+    private void sync_accountsservice_to_gsettings () {
+        mouse_settings.set_boolean ("left-handed", accounts_service.left_handed);
+    }
+
+    private void sync_gsettings_to_accountsservice () {
+        accounts_service.left_handed = mouse_settings.get_boolean ("left-handed");
+    }
+}

src/meson.build

@@ -4,6 +4,7 @@ sources = files(
     'SessionManager.vala',
     'Backends/Housekeeping.vala',
     'Backends/KeyboardSettings.vala',
+    'Backends/MouseSettings.vala',
     'Backends/PrefersColorSchemeSettings.vala',
     'Utils/SunriseSunsetCalculator.vala',
 )