Button to easily restore default settings on the preferences panel

src/pyj/book_list/prefs.pyj

@@ -4,6 +4,8 @@
 from dom import clear
 from elementmaker import E
 from book_list.globals import get_session_data
+from widgets import create_button
+from gettext import gettext as _
 
 # from book_list.theme import get_font_size, get_color
 
@@ -47,13 +49,20 @@ class ConfigItem:
         get_session_data().set(self.item_data.name, val)
 
     def defval(self):
-        return get_session_data().defval(self.item_data.name)
+        val = get_session_data().defval(self.item_data.name)
+        if self.item_data.from_storage:
+            val = self.item_data.from_storage(val)
+        return val
 
     def ui_value_changed(self):
         if self.ignore_ui_value_changed:
             return
         self.to_storage(self.from_ui())
 
+    def reset_to_default(self):
+        self.to_ui(self.defval())
+        self.ui_value_changed()
+
     def to_ui(self, val):
         pass
 
@@ -95,6 +104,7 @@ class CheckBox(ConfigItem):
         control = div.firstChild
         control.addEventListener('change', self.ui_value_changed.bind(self))
         control.addEventListener('focus', onfocus)
+        div.lastChild.addEventListener('click', self.toggle.bind(self))
 
     @property
     def control(self):
@@ -106,6 +116,10 @@ class CheckBox(ConfigItem):
     def from_ui(self):
         return bool(self.control.checked)
 
+    def toggle(self):
+        self.to_ui(not self.from_ui())
+        self.ui_value_changed()
+
 class SpinBox(ConfigItem):
 
     def __init__(self, item_data, container, onfocus):
@@ -211,3 +225,14 @@ class PrefsPanel:
             else:
                 cls = LineEdit
             self.widgets.append((new cls(item, div.firstChild, onfocus(item.name))).initialize())
+        if self.widgets.length:
+            c.appendChild(
+                E.div(
+                    style='margin:1ex 1em; padding: 1em; text-align:center',
+                    create_button(_('Restore default settings'), 'refresh', self.reset_to_defaults.bind(self))
+                )
+            )
+
+    def reset_to_defaults(self):
+        for w in self.widgets:
+            w.reset_to_default()

src/pyj/book_list/ui.pyj

@@ -90,14 +90,19 @@ class UI:
         self.panel_map['booklist-sort-menu'] = UIState(ClosePanelBar(_('Sort books')), panel_data=def():
             return self.books_view.sort_panel_data(create_item)
         )
-        self.panel_map['booklist-config-tb'] = UIState(
-            ClosePanelBar(_('Configure Tag Browser'), close_callback=self.search_panel.apply_prefs.bind(self.search_panel)),
-            main_panel=self.prefs_panel, panel_data=self.search_panel.get_prefs.bind(self.search_panel))
+        self.panel_map['booklist-config-tb'] = self.create_prefences_panel(
+            _('Configure Tag Browser'), close_callback=self.search_panel.apply_prefs.bind(self.search_panel),
+            panel_data=self.search_panel.get_prefs.bind(self.search_panel))
 
         bss = ClosePanelBar(_('Search for books'))
         bss.add_button(icon_name='cogs', tooltip=_('Configure Tag Browser'), action=show_panel_action('booklist-config-tb'))
         self.panel_map['booklist-search'] = UIState(bss, main_panel=self.search_panel)
 
+    def create_prefences_panel(self, title, close_callback=None, panel_data=None):
+        ans = UIState(ClosePanelBar(title), close_callback=close_callback, main_panel=self.prefs_panel, panel_data=panel_data)
+        ans.add_button(icon_name='refresh', tooltip=_('Restore default settings'), action=self.prefs_panel.reset_to_defaults.bind(self.prefs_panel))
+        return ans
+
     def on_resize(self):
         pass
 

src/pyj/session.pyj

@@ -120,6 +120,9 @@ class UserSessionData(SessionData):
                 self.set(key, saved_data[key])
         self.echo_changes = True
 
+    def defval(self, key):
+        return defaults[key]
+
     def get(self, key, defval):
         if defval is undefined:
             defval = defaults[key]