When presenting the calibre must be restarted warning after installing a new plugin, add a restart now button so that the user can conveniently restart calibre

src/calibre/gui2/actions/preferences.py

@@ -45,6 +45,8 @@ class PreferencesAction(InterfaceAction):
         d = PluginUpdaterDialog(self.gui,
                 initial_filter=FILTER_NOT_INSTALLED)
         d.exec_()
+        if d.do_restart:
+            self.gui.quit(restart=True)
 
     def do_config(self, checked=False, initial_plugin=None,
             close_after_initial=False):

src/calibre/gui2/dialogs/plugin_updater.py

@@ -456,6 +456,7 @@ class PluginUpdaterDialog(SizePersistedDialog):
         self.gui = gui
         self.forum_link = None
         self.model = None
+        self.do_restart = False
         self._initialize_controls()
         self._create_context_menu()
 
@@ -720,6 +721,7 @@ class PluginUpdaterDialog(SizePersistedDialog):
             prints('Installing plugin: ', zip_path)
         self.gui.status_bar.showMessage(_('Installing plugin: %s') % zip_path)
 
+        do_restart = False
         try:
             try:
                 plugin = add_plugin(zip_path)
@@ -731,11 +733,21 @@ class PluginUpdaterDialog(SizePersistedDialog):
             widget.gui = self.gui
             widget.check_for_add_to_toolbars(plugin)
             self.gui.status_bar.showMessage(_('Plugin installed: %s') % display_plugin.name)
-            info_dialog(self.gui, _('Success'),
+            d = info_dialog(self.gui, _('Success'),
                     _('Plugin <b>{0}</b> successfully installed under <b>'
                         ' {1} plugins</b>. You may have to restart calibre '
                         'for the plugin to take effect.').format(plugin.name, plugin.type),
-                    show=True, show_copy_button=False)
+                    show_copy_button=False)
+            b = d.bb.addButton(_('Restart calibre now'), d.bb.AcceptRole)
+            b.setIcon(QIcon(I('lt.png')))
+            d.do_restart = False
+            def rf():
+                d.do_restart = True
+            b.clicked.connect(rf)
+            d.set_details('')
+            d.exec_()
+            b.clicked.disconnect()
+            do_restart = d.do_restart
 
             display_plugin.plugin = plugin
             # We cannot read the 'actual' version information as the plugin will not be loaded yet
@@ -762,6 +774,9 @@ class PluginUpdaterDialog(SizePersistedDialog):
         else:
             self.model.refresh_plugin(display_plugin)
             self._select_and_focus_view(change_selection=False)
+        if do_restart:
+            self.do_restart = True
+            self.accept()
 
     def _history_clicked(self):
         display_plugin = self._selected_display_plugin()

src/calibre/gui2/preferences/__init__.py

@@ -236,6 +236,7 @@ class ConfigWidgetBase(QWidget, ConfigWidgetInterface):
     '''
 
     changed_signal = pyqtSignal()
+    restart_now = pyqtSignal()
     supports_restoring_to_defaults = True
     restart_critical = False
 

src/calibre/gui2/preferences/main.py

@@ -290,6 +290,7 @@ class Preferences(QMainWindow):
         self.apply_action.setEnabled(False)
         self.showing_widget.changed_signal.connect(lambda :
                 self.apply_action.setEnabled(True))
+        self.showing_widget.restart_now.connect(self.restart_now)
         self.restore_action.setEnabled(self.showing_widget.supports_restoring_to_defaults)
         tt = self.showing_widget.restore_defaults_desc
         if not self.restore_action.isEnabled():
@@ -319,6 +320,15 @@ class Preferences(QMainWindow):
         elif self.stack.currentIndex() == 0:
             self.close()
 
+    def restart_now(self):
+        try:
+            self.showing_widget.commit()
+        except AbortCommit:
+            return
+        self.hide_plugin()
+        self.close()
+        self.gui.quit(restart=True)
+
     def commit(self, *args):
         try:
             must_restart = self.showing_widget.commit()

src/calibre/gui2/preferences/plugins.py

@@ -384,6 +384,8 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         self._plugin_model.populate()
         self._plugin_model.reset()
         self.changed_signal.emit()
+        if d.do_restart:
+            self.restart_now.emit()
 
     def reload_store_plugins(self):
         self.gui.load_store_plugins()