Edit Book: Make the warning dialog that pops up when you try to quit while the editor is saving changes in the background a little more clear. Fixes #1347171 [Background save dialog confusion with "save changes"](https://bugs.launchpad.net/calibre/+bug/1347171)

src/calibre/gui2/__init__.py

@@ -323,7 +323,11 @@ def question_dialog(parent, title, msg, det_msg='', show_copy_button=False,
         skip_dialog_name=None, skip_dialog_msg=_('Show this confirmation again'),
         skip_dialog_skipped_value=True, skip_dialog_skip_precheck=True,
         # Override icon (QIcon to be used as the icon for this dialog)
-        override_icon=None):
+        override_icon=None,
+        # Change the text/icons of the yes and no buttons.
+        # The icons must be QIcon objects or strings for I()
+        yes_text=None, no_text=None, yes_icon=None, no_icon=None,
+    ):
     from calibre.gui2.dialogs.message_box import MessageBox
 
     auto_skip = set(gprefs.get('questions_to_auto_skip', []))
@@ -332,7 +336,8 @@ def question_dialog(parent, title, msg, det_msg='', show_copy_button=False,
 
     d = MessageBox(MessageBox.QUESTION, title, msg, det_msg, parent=parent,
                    show_copy_button=show_copy_button, default_yes=default_yes,
-                    q_icon=override_icon)
+                   q_icon=override_icon, yes_text=yes_text, no_text=no_text,
+                   yes_icon=yes_icon, no_icon=no_icon)
 
     if skip_dialog_name is not None and skip_dialog_msg:
         tc = d.toggle_checkbox

src/calibre/gui2/dialogs/message_box.py

@@ -25,7 +25,8 @@ class MessageBox(QDialog, Ui_Dialog):  # {{{
                  det_msg='',
                  q_icon=None,
                  show_copy_button=True,
-                 parent=None, default_yes=True):
+                 parent=None, default_yes=True,
+                 yes_text=None, no_text=None, yes_icon=None, no_icon=None):
         QDialog.__init__(self, parent)
         if q_icon is None:
             icon = {
@@ -71,6 +72,14 @@ class MessageBox(QDialog, Ui_Dialog):  # {{{
             self.bb.button(self.bb.Yes if default_yes else self.bb.No
                     ).setDefault(True)
             self.default_yes = default_yes
+            if yes_text is not None:
+                self.bb.button(self.bb.Yes).setText(yes_text)
+            if no_text is not None:
+                self.bb.button(self.bb.No).setText(no_text)
+            if yes_icon is not None:
+                self.bb.button(self.bb.Yes).setIcon(yes_icon if isinstance(yes_icon, QIcon) else QIcon(I(yes_icon)))
+            if no_icon is not None:
+                self.bb.button(self.bb.No).setIcon(yes_icon if isinstance(no_icon, QIcon) else QIcon(I(no_icon)))
         else:
             self.bb.button(self.bb.Ok).setDefault(True)
 

src/calibre/gui2/tweak_book/boss.py

@@ -1281,23 +1281,27 @@ class Boss(QObject):
         self.gui.insert_char.show()
 
     # Shutdown {{{
-    def quit(self):
-        if not self.confirm_quit():
-            return
-        self.save_state()
-        self.shutdown()
-        QApplication.instance().quit()
 
-    def confirm_quit(self):
+    def quit(self):
         if self.doing_terminal_save:
             return False
         if self.save_manager.has_tasks:
-            if not question_dialog(
+            if question_dialog(
                 self.gui, _('Are you sure?'), _(
-                    'The current book is being saved in the background, quitting will abort'
+                    'The current book is being saved in the background. Quitting now will'
-                    ' the save process, are you sure?'), default_yes=False):
+                    ' <b>abort the save process</b>! Finish saving first?'),
+                    yes_text=_('Finish &saving first'), no_text=_('&Quit immediately')):
+                self.start_terminal_save_indicator()
                 return False
 
+        if not self.confirm_quit():
+            return False
+        self.save_state()
+        self.shutdown()
+        QApplication.instance().quit()
+        return True
+
+    def confirm_quit(self):
         if self.gui.action_save.isEnabled():
             d = QDialog(self.gui)
             d.l = QGridLayout(d)
@@ -1329,13 +1333,17 @@ class Boss(QObject):
                 return False
             if d.do_save:
                 self.gui.action_save.trigger()
+                self.start_terminal_save_indicator()
+                return False
+
+        return True
+
+    def start_terminal_save_indicator(self):
+        self.save_state()
         self.gui.blocking_job.set_msg(_('Saving, please wait...'))
         self.gui.blocking_job.start()
         self.doing_terminal_save = True
         QTimer.singleShot(50, self.check_terminal_save)
-                return False
-
-        return True
 
     def check_terminal_save(self):
         if self.save_manager.has_tasks: