[dconf-editor] Split dconf-window.vala in two files.

[Arnaud Bonatti <arnaudb src gnome org>]

commit 57d280acd4a9cfdf927dc2f8c788bbd6ed3c4eba
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Wed Nov 25 13:23:29 2015 +0100

    Split dconf-window.vala in two files.

 editor/Makefile.am           |    3 +-
 editor/dconf-window.vala     |  316 ---------------------------------------
 editor/key-list-box-row.vala |  334 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 336 insertions(+), 317 deletions(-)
---
diff --git a/editor/Makefile.am b/editor/Makefile.am
index aa64b55..344cdc3 100644
--- a/editor/Makefile.am
+++ b/editor/Makefile.am
@@ -40,7 +40,8 @@ dconf_editor_SOURCES = \
        dconf-window.vala \
        dconf-model.vala \
        dconf-view.vala \
-       bookmarks.vala
+       bookmarks.vala \
+       key-list-box-row.vala
 
 desktopdir = $(datadir)/applications
 desktop_in_files = ca.desrt.dconf-editor.desktop.in.in
diff --git a/editor/dconf-window.vala b/editor/dconf-window.vala
index dc0abc4..45d013f 100644
--- a/editor/dconf-window.vala
+++ b/editor/dconf-window.vala
@@ -339,319 +339,3 @@ class DConfWindow : ApplicationWindow
         return true;
     }
 }
-
-[GtkTemplate (ui = "/ca/desrt/dconf-editor/ui/key-list-box-row.ui")]
-private class KeyListBoxRow : EventBox
-{
-    protected Window window { get; set; }
-    protected Notification notification = new Notification (_("Copied to clipboard"));
-    protected bool notification_active = false;
-    protected uint notification_number;
-
-    [GtkChild] protected Label key_name_label;
-    [GtkChild] protected Label key_value_label;
-    [GtkChild] protected Label key_info_label;
-
-    public signal void show_dialog ();
-
-    protected ContextPopover? nullable_popover;
-    protected virtual bool generate_popover (ContextPopover popover) { return false; }      // no popover 
should be created
-
-    public override bool button_press_event (Gdk.EventButton event)     // list_box_row selection is done 
elsewhere
-    {
-        if (event.button == Gdk.BUTTON_SECONDARY)
-        {
-            nullable_popover = new ContextPopover ();
-            if (!generate_popover ((!) nullable_popover))
-                return false;
-
-            ((!) nullable_popover).set_relative_to (this);
-            ((!) nullable_popover).position = PositionType.BOTTOM;     // TODO better
-
-            Gdk.Rectangle rect;
-            ((!) nullable_popover).get_pointing_to (out rect);
-            rect.x = (int) (event.x - this.get_allocated_width () / 2.0);
-            ((!) nullable_popover).set_pointing_to (rect);
-            ((!) nullable_popover).show ();
-        }
-
-        return false;
-    }
-
-    protected void copy_text (string text)
-    {
-        // clipboard
-        Gdk.Display? display = Gdk.Display.get_default ();
-        if (display == null)
-            return;
-
-        Clipboard clipboard = Clipboard.get_default ((!) display);
-        clipboard.set_text (text, text.length);
-
-        // notification
-        GLib.Application application = window.get_application ();   // TODO better; but "of course", after 
the window is added to the application...
-        if (notification_active == true)
-        {
-            Source.remove (notification_number);
-            notification_active = false;
-        }
-
-        notification_number = Timeout.add_seconds (30, () => {
-                if (notification_active == false)
-                    return Source.CONTINUE;
-                application.withdraw_notification ("copy");
-                notification_active = false;
-                return Source.REMOVE;
-            });
-        notification_active = true;
-
-        notification.set_body (text);
-        application.withdraw_notification ("copy");     // TODO report bug: Shell cancels previous 
notification of the same name, instead of replacing it
-        application.send_notification ("copy", notification);
-    }
-
-    protected static string cool_text_value (Key key)   // TODO better
-    {
-        return Key.cool_text_value_from_variant (key.value, key.type_string);
-    }
-}
-
-private class KeyListBoxRowEditableNoSchema : KeyListBoxRow
-{
-    public DConfKey key { get; private set; }
-
-    public KeyListBoxRowEditableNoSchema (Window _window, DConfKey _key)
-    {
-        this.window = _window;
-        this.key = _key;
-
-        Pango.AttrList attr_list = new Pango.AttrList ();
-        attr_list.insert (Pango.attr_weight_new (Pango.Weight.BOLD));
-        key_name_label.set_attributes (attr_list);
-        key_value_label.set_attributes (attr_list);
-
-        key_name_label.label = key.name;
-        key_value_label.label = cool_text_value (key);
-        key_info_label.set_markup ("<i>" + _("No Schema Found") + "</i>");
-
-        key.value_changed.connect (() => { key_value_label.label = cool_text_value (key); if 
(nullable_popover != null) nullable_popover.destroy (); });
-    }
-
-    protected override bool generate_popover (ContextPopover popover)
-    {
-        popover.new_action ("customize", () => { show_dialog (); });
-        popover.new_action ("copy", () => { copy_text (key.full_name + " " + key.value.print (false)); });
-
-        if (key.type_string == "b" || key.type_string == "mb")
-        {
-            popover.new_section ();
-            popover.create_buttons_list (key, false);
-
-            popover.value_changed.connect ((gvariant) => { nullable_popover.destroy (); key.value = 
gvariant; });
-        }
-        return true;
-    }
-}
-
-private class KeyListBoxRowEditable : KeyListBoxRow
-{
-    public GSettingsKey key { get; private set; }
-
-    private Pango.AttrList attr_list = new Pango.AttrList ();
-
-    public KeyListBoxRowEditable (Window _window, GSettingsKey _key)
-    {
-        this.window = _window;
-        this.key = _key;
-
-        key_value_label.set_attributes (attr_list);
-        update ();      // sets key_name_label attributes and key_value_label label
-        key_name_label.label = key.name;
-        key_info_label.label = key.summary;
-
-        key.value_changed.connect (() => { update (); if (nullable_popover != null) nullable_popover.destroy 
(); });
-    }
-
-    protected override bool generate_popover (ContextPopover popover)
-    {
-        popover.new_action ("customize", () => { show_dialog (); });
-        popover.new_action ("copy", () => { copy_text (key.schema_id + " " + key.name + " " + 
key.value.print (false)); });
-
-        if (key.type_string == "b" || key.type_string == "<enum>" || key.type_string == "mb")
-        {
-            popover.new_section ();
-            popover.create_buttons_list (key, true);
-
-            popover.set_to_default.connect (() => { nullable_popover.destroy (); key.set_to_default (); });
-            popover.value_changed.connect ((gvariant) => { nullable_popover.destroy (); key.value = 
gvariant; });
-        }
-        else if (key.type_string == "<flags>")
-        {
-            popover.new_section ();
-            if (!key.is_default)
-            {
-                popover.new_action ("default2", () => { nullable_popover.destroy (); key.set_to_default (); 
});
-                popover.new_section (false);    // ensures a flag called "default2" won't cause problems
-            }
-            popover.create_flags_list ((GSettingsKey) key);
-
-            popover.value_changed.connect ((gvariant) => { key.value = gvariant; });
-        }
-        else if (!key.is_default)
-        {
-            popover.new_section ();
-            popover.new_action ("default1", () => { key.set_to_default (); });
-        }
-        return true;
-    }
-
-    private void update ()
-    {
-        attr_list.change (Pango.attr_weight_new (key.is_default ? Pango.Weight.NORMAL : Pango.Weight.BOLD));
-        key_name_label.set_attributes (attr_list);
-        // TODO key_info_label.set_attributes (attr_list); ?
-
-        key_value_label.label = cool_text_value (key);
-    }
-}
-
-private class ContextPopover : Popover
-{
-    private GLib.Menu menu = new GLib.Menu ();
-    private GLib.Menu current_section;
-
-    private ActionMap current_group;
-    private string current_group_prefix = "";
-
-    // public signals
-    public signal void set_to_default ();
-    public signal void value_changed (Variant gvariant);
-
-    public ContextPopover ()
-    {
-        new_section ();
-
-        bind_model (menu, null);    // TODO menu.freeze() [and sections?], somewhere
-    }
-
-    /*\
-    * * Simple actions
-    \*/
-
-    public delegate void button_action ();
-    public void new_action (string action_action, button_action action)
-    {
-        string text;
-        switch (action_action)        // TODO enum
-        {
-            /* Translators: "open key-editor dialog" action in the right-click menu on the list of keys */
-            case "customize":   text = _("Customize…");     break;
-            /* Translators: "copy to clipboard" action in the right-click menu on the list of keys */
-            case "copy":        text = _("Copy");           break;
-            /* Translators: "reset key value" action in the right-click menu on the list of keys */
-            case "default1":    text = _("Set to default"); break;
-            /* Translators: "reset key value" option of a multi-choice list in the right-click menu on the 
list of keys */
-            case "default2":    text = _("Default value");  break;      // TODO string duplication
-            default: assert_not_reached ();
-        }
-
-        SimpleAction simple_action = new SimpleAction (action_action, null);
-        simple_action.activate.connect (() => { action (); });
-        current_group.add_action (simple_action);
-
-        current_section.append (text, current_group_prefix + "." + action_action);
-    }
-
-    public void new_section (bool draw_line = true)
-    {
-        current_group_prefix += "a";
-        current_group = new SimpleActionGroup ();
-        insert_action_group (current_group_prefix, (SimpleActionGroup) current_group);
-
-        if (!draw_line)
-            return;
-
-        current_section = new GLib.Menu ();
-        menu.append_section (null, current_section);
-    }
-
-    /*\
-    * * Flags
-    \*/
-
-    public void create_flags_list (GSettingsKey key)
-    {
-        GLib.Settings settings = new GLib.Settings (key.schema_id);
-        string [] active_flags = settings.get_strv (key.name);
-        string [] all_flags = key.range_content.get_strv ();
-        SimpleAction [] flags_actions = new SimpleAction [0];
-        foreach (string flag in all_flags)
-        {
-            SimpleAction simple_action = new SimpleAction.stateful (flag, null, new Variant.boolean (flag in 
active_flags));
-            current_group.add_action (simple_action);
-
-            current_section.append (flag, current_group_prefix + "." + flag);
-
-            flags_actions += simple_action;
-
-            simple_action.change_state.connect ((gaction, gvariant) => {
-                    gaction.set_state (gvariant);
-
-                    string [] new_flags = new string [0];
-                    foreach (SimpleAction action in flags_actions)
-                        if (action.state.get_boolean ())
-                            new_flags += action.name;
-                    Variant variant = new Variant.strv (new_flags);
-                    value_changed (variant);
-                });
-        }
-    }
-
-    /*\
-    * * Choices
-    \*/
-
-    public void create_buttons_list (Key key, bool nullable)
-    {
-        const string ACTION_NAME = "reservedactionprefix";
-
-        VariantType original_type = key.value.get_type ();
-        VariantType nullable_type = new VariantType.maybe (original_type);
-        string nullable_type_string = nullable_type.dup_string ();
-        Variant variant = new Variant.maybe (original_type, key.has_schema && ((GSettingsKey) 
key).is_default ? null : key.value);
-
-        current_group.add_action (new SimpleAction.stateful (ACTION_NAME, nullable_type, variant));
-
-        if (nullable)
-            current_section.append (_("Default value"), current_group_prefix + "." + ACTION_NAME + "(@" + 
nullable_type_string + " nothing)");   // TODO string duplication
-
-        switch (key.type_string)
-        {
-            case "b":
-                current_section.append (Key.cool_boolean_text_value (true), current_group_prefix + "." + 
ACTION_NAME + "(@mb true)");
-                current_section.append (Key.cool_boolean_text_value (false), current_group_prefix + "." + 
ACTION_NAME + "(@mb false)");
-                break;
-            case "<enum>":      // defined by the schema
-                Variant range = ((GSettingsKey) key).range_content;
-                uint size = (uint) range.n_children ();
-                if (size == 0)      // TODO special case also 1?
-                    assert_not_reached ();
-                for (uint index = 0; index < size; index++)
-                    current_section.append (range.get_child_value (index).print (false), 
current_group_prefix + "." + ACTION_NAME + "(@ms '" + range.get_child_value (index).get_string () + "')");    
    // TODO use int settings.get_enum ()
-                break;
-            case "mb":
-                current_section.append (Key.cool_boolean_text_value (null), current_group_prefix + "." + 
ACTION_NAME + "(@mmb just nothing)");
-                current_section.append (Key.cool_boolean_text_value (true), current_group_prefix + "." + 
ACTION_NAME + "(@mmb true)");
-                current_section.append (Key.cool_boolean_text_value (false), current_group_prefix + "." + 
ACTION_NAME + "(@mmb false)");
-                break;
-        }
-
-        ((GLib.ActionGroup) current_group).action_state_changed [ACTION_NAME].connect ((unknown_string, 
tmp_variant) => {
-                Variant? new_variant = tmp_variant.get_maybe ();
-                if (new_variant == null)
-                    set_to_default ();
-                else
-                    value_changed ((!) new_variant);
-            });
-    }
-}
diff --git a/editor/key-list-box-row.vala b/editor/key-list-box-row.vala
new file mode 100644
index 0000000..5d93324
--- /dev/null
+++ b/editor/key-list-box-row.vala
@@ -0,0 +1,334 @@
+/*
+  This file is part of Dconf Editor
+
+  Dconf Editor 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.
+
+  Dconf Editor 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 Dconf Editor.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+using Gtk;
+
+[GtkTemplate (ui = "/ca/desrt/dconf-editor/ui/key-list-box-row.ui")]
+private class KeyListBoxRow : EventBox
+{
+    protected Window window { get; set; }
+    protected Notification notification = new Notification (_("Copied to clipboard"));
+    protected bool notification_active = false;
+    protected uint notification_number;
+
+    [GtkChild] protected Label key_name_label;
+    [GtkChild] protected Label key_value_label;
+    [GtkChild] protected Label key_info_label;
+
+    public signal void show_dialog ();
+
+    protected ContextPopover? nullable_popover;
+    protected virtual bool generate_popover (ContextPopover popover) { return false; }      // no popover 
should be created
+
+    public override bool button_press_event (Gdk.EventButton event)     // list_box_row selection is done 
elsewhere
+    {
+        if (event.button == Gdk.BUTTON_SECONDARY)
+        {
+            nullable_popover = new ContextPopover ();
+            if (!generate_popover ((!) nullable_popover))
+                return false;
+
+            ((!) nullable_popover).set_relative_to (this);
+            ((!) nullable_popover).position = PositionType.BOTTOM;     // TODO better
+
+            Gdk.Rectangle rect;
+            ((!) nullable_popover).get_pointing_to (out rect);
+            rect.x = (int) (event.x - this.get_allocated_width () / 2.0);
+            ((!) nullable_popover).set_pointing_to (rect);
+            ((!) nullable_popover).show ();
+        }
+
+        return false;
+    }
+
+    protected void copy_text (string text)
+    {
+        // clipboard
+        Gdk.Display? display = Gdk.Display.get_default ();
+        if (display == null)
+            return;
+
+        Clipboard clipboard = Clipboard.get_default ((!) display);
+        clipboard.set_text (text, text.length);
+
+        // notification
+        GLib.Application application = window.get_application ();   // TODO better; but "of course", after 
the window is added to the application...
+        if (notification_active == true)
+        {
+            Source.remove (notification_number);
+            notification_active = false;
+        }
+
+        notification_number = Timeout.add_seconds (30, () => {
+                if (notification_active == false)
+                    return Source.CONTINUE;
+                application.withdraw_notification ("copy");
+                notification_active = false;
+                return Source.REMOVE;
+            });
+        notification_active = true;
+
+        notification.set_body (text);
+        application.withdraw_notification ("copy");     // TODO report bug: Shell cancels previous 
notification of the same name, instead of replacing it
+        application.send_notification ("copy", notification);
+    }
+
+    protected static string cool_text_value (Key key)   // TODO better
+    {
+        return Key.cool_text_value_from_variant (key.value, key.type_string);
+    }
+}
+
+private class KeyListBoxRowEditableNoSchema : KeyListBoxRow
+{
+    public DConfKey key { get; private set; }
+
+    public KeyListBoxRowEditableNoSchema (Window _window, DConfKey _key)
+    {
+        this.window = _window;
+        this.key = _key;
+
+        Pango.AttrList attr_list = new Pango.AttrList ();
+        attr_list.insert (Pango.attr_weight_new (Pango.Weight.BOLD));
+        key_name_label.set_attributes (attr_list);
+        key_value_label.set_attributes (attr_list);
+
+        key_name_label.label = key.name;
+        key_value_label.label = cool_text_value (key);
+        key_info_label.set_markup ("<i>" + _("No Schema Found") + "</i>");
+
+        key.value_changed.connect (() => { key_value_label.label = cool_text_value (key); if 
(nullable_popover != null) nullable_popover.destroy (); });
+    }
+
+    protected override bool generate_popover (ContextPopover popover)
+    {
+        popover.new_action ("customize", () => { show_dialog (); });
+        popover.new_action ("copy", () => { copy_text (key.full_name + " " + key.value.print (false)); });
+
+        if (key.type_string == "b" || key.type_string == "mb")
+        {
+            popover.new_section ();
+            popover.create_buttons_list (key, false);
+
+            popover.value_changed.connect ((gvariant) => { nullable_popover.destroy (); key.value = 
gvariant; });
+        }
+        return true;
+    }
+}
+
+private class KeyListBoxRowEditable : KeyListBoxRow
+{
+    public GSettingsKey key { get; private set; }
+
+    private Pango.AttrList attr_list = new Pango.AttrList ();
+
+    public KeyListBoxRowEditable (Window _window, GSettingsKey _key)
+    {
+        this.window = _window;
+        this.key = _key;
+
+        key_value_label.set_attributes (attr_list);
+        update ();      // sets key_name_label attributes and key_value_label label
+        key_name_label.label = key.name;
+        key_info_label.label = key.summary;
+
+        key.value_changed.connect (() => { update (); if (nullable_popover != null) nullable_popover.destroy 
(); });
+    }
+
+    protected override bool generate_popover (ContextPopover popover)
+    {
+        popover.new_action ("customize", () => { show_dialog (); });
+        popover.new_action ("copy", () => { copy_text (key.schema_id + " " + key.name + " " + 
key.value.print (false)); });
+
+        if (key.type_string == "b" || key.type_string == "<enum>" || key.type_string == "mb")
+        {
+            popover.new_section ();
+            popover.create_buttons_list (key, true);
+
+            popover.set_to_default.connect (() => { nullable_popover.destroy (); key.set_to_default (); });
+            popover.value_changed.connect ((gvariant) => { nullable_popover.destroy (); key.value = 
gvariant; });
+        }
+        else if (key.type_string == "<flags>")
+        {
+            popover.new_section ();
+            if (!key.is_default)
+            {
+                popover.new_action ("default2", () => { nullable_popover.destroy (); key.set_to_default (); 
});
+                popover.new_section (false);    // ensures a flag called "default2" won't cause problems
+            }
+            popover.create_flags_list ((GSettingsKey) key);
+
+            popover.value_changed.connect ((gvariant) => { key.value = gvariant; });
+        }
+        else if (!key.is_default)
+        {
+            popover.new_section ();
+            popover.new_action ("default1", () => { key.set_to_default (); });
+        }
+        return true;
+    }
+
+    private void update ()
+    {
+        attr_list.change (Pango.attr_weight_new (key.is_default ? Pango.Weight.NORMAL : Pango.Weight.BOLD));
+        key_name_label.set_attributes (attr_list);
+        // TODO key_info_label.set_attributes (attr_list); ?
+
+        key_value_label.label = cool_text_value (key);
+    }
+}
+
+private class ContextPopover : Popover
+{
+    private GLib.Menu menu = new GLib.Menu ();
+    private GLib.Menu current_section;
+
+    private ActionMap current_group;
+    private string current_group_prefix = "";
+
+    // public signals
+    public signal void set_to_default ();
+    public signal void value_changed (Variant gvariant);
+
+    public ContextPopover ()
+    {
+        new_section ();
+
+        bind_model (menu, null);    // TODO menu.freeze() [and sections?], somewhere
+    }
+
+    /*\
+    * * Simple actions
+    \*/
+
+    public delegate void button_action ();
+    public void new_action (string action_action, button_action action)
+    {
+        string text;
+        switch (action_action)        // TODO enum
+        {
+            /* Translators: "open key-editor dialog" action in the right-click menu on the list of keys */
+            case "customize":   text = _("Customize…");     break;
+            /* Translators: "copy to clipboard" action in the right-click menu on the list of keys */
+            case "copy":        text = _("Copy");           break;
+            /* Translators: "reset key value" action in the right-click menu on the list of keys */
+            case "default1":    text = _("Set to default"); break;
+            /* Translators: "reset key value" option of a multi-choice list in the right-click menu on the 
list of keys */
+            case "default2":    text = _("Default value");  break;      // TODO string duplication
+            default: assert_not_reached ();
+        }
+
+        SimpleAction simple_action = new SimpleAction (action_action, null);
+        simple_action.activate.connect (() => { action (); });
+        current_group.add_action (simple_action);
+
+        current_section.append (text, current_group_prefix + "." + action_action);
+    }
+
+    public void new_section (bool draw_line = true)
+    {
+        current_group_prefix += "a";
+        current_group = new SimpleActionGroup ();
+        insert_action_group (current_group_prefix, (SimpleActionGroup) current_group);
+
+        if (!draw_line)
+            return;
+
+        current_section = new GLib.Menu ();
+        menu.append_section (null, current_section);
+    }
+
+    /*\
+    * * Flags
+    \*/
+
+    public void create_flags_list (GSettingsKey key)
+    {
+        GLib.Settings settings = new GLib.Settings (key.schema_id);
+        string [] active_flags = settings.get_strv (key.name);
+        string [] all_flags = key.range_content.get_strv ();
+        SimpleAction [] flags_actions = new SimpleAction [0];
+        foreach (string flag in all_flags)
+        {
+            SimpleAction simple_action = new SimpleAction.stateful (flag, null, new Variant.boolean (flag in 
active_flags));
+            current_group.add_action (simple_action);
+
+            current_section.append (flag, current_group_prefix + "." + flag);
+
+            flags_actions += simple_action;
+
+            simple_action.change_state.connect ((gaction, gvariant) => {
+                    gaction.set_state (gvariant);
+
+                    string [] new_flags = new string [0];
+                    foreach (SimpleAction action in flags_actions)
+                        if (action.state.get_boolean ())
+                            new_flags += action.name;
+                    Variant variant = new Variant.strv (new_flags);
+                    value_changed (variant);
+                });
+        }
+    }
+
+    /*\
+    * * Choices
+    \*/
+
+    public void create_buttons_list (Key key, bool nullable)
+    {
+        const string ACTION_NAME = "reservedactionprefix";
+
+        VariantType original_type = key.value.get_type ();
+        VariantType nullable_type = new VariantType.maybe (original_type);
+        string nullable_type_string = nullable_type.dup_string ();
+        Variant variant = new Variant.maybe (original_type, key.has_schema && ((GSettingsKey) 
key).is_default ? null : key.value);
+
+        current_group.add_action (new SimpleAction.stateful (ACTION_NAME, nullable_type, variant));
+
+        if (nullable)
+            current_section.append (_("Default value"), current_group_prefix + "." + ACTION_NAME + "(@" + 
nullable_type_string + " nothing)");   // TODO string duplication
+
+        switch (key.type_string)
+        {
+            case "b":
+                current_section.append (Key.cool_boolean_text_value (true), current_group_prefix + "." + 
ACTION_NAME + "(@mb true)");
+                current_section.append (Key.cool_boolean_text_value (false), current_group_prefix + "." + 
ACTION_NAME + "(@mb false)");
+                break;
+            case "<enum>":      // defined by the schema
+                Variant range = ((GSettingsKey) key).range_content;
+                uint size = (uint) range.n_children ();
+                if (size == 0)      // TODO special case also 1?
+                    assert_not_reached ();
+                for (uint index = 0; index < size; index++)
+                    current_section.append (range.get_child_value (index).print (false), 
current_group_prefix + "." + ACTION_NAME + "(@ms '" + range.get_child_value (index).get_string () + "')");    
    // TODO use int settings.get_enum ()
+                break;
+            case "mb":
+                current_section.append (Key.cool_boolean_text_value (null), current_group_prefix + "." + 
ACTION_NAME + "(@mmb just nothing)");
+                current_section.append (Key.cool_boolean_text_value (true), current_group_prefix + "." + 
ACTION_NAME + "(@mmb true)");
+                current_section.append (Key.cool_boolean_text_value (false), current_group_prefix + "." + 
ACTION_NAME + "(@mmb false)");
+                break;
+        }
+
+        ((GLib.ActionGroup) current_group).action_state_changed [ACTION_NAME].connect ((unknown_string, 
tmp_variant) => {
+                Variant? new_variant = tmp_variant.get_maybe ();
+                if (new_variant == null)
+                    set_to_default ();
+                else
+                    value_changed ((!) new_variant);
+            });
+    }
+}