Propagate "update check" prompt to UI checkbox

The "check for updates" button wasn't showing up immediately as checked
as soon as the user is prompted for checking updates. This fixes that.

Fixes #513

dangerzone/gui/__init__.py

@@ -123,6 +123,7 @@ def open_files(filenames: List[str] = []) -> None:
     # Check for updates
     log.debug("Setting up Dangezone updater")
     updater = UpdaterThread(dangerzone)
+    updater.update_check_toggled.connect(window.refresh_updates_checkbox)
     window.register_update_handler(updater.finished)
 
     log.debug("Consulting updater settings before checking for updates")

dangerzone/gui/main_window.py

@@ -229,6 +229,11 @@ def toggle_updates_triggered(self) -> None:
         self.dangerzone.settings.set("updater_check", check)
         self.dangerzone.settings.save()
 
+    def refresh_updates_checkbox(self) -> None:
+        """Refreshes the "check for updates" checkbox according to the settings"""
+        check = self.dangerzone.settings.get("updater_check")
+        self.toggle_updates_action.setChecked(check)
+
     def handle_updates(self, report: UpdateReport) -> None:
         """Handle update reports from the update checker thread.
 

dangerzone/gui/updater.py

@@ -107,6 +107,7 @@ class UpdaterThread(QtCore.QThread):
     """
 
     finished = QtCore.Signal(UpdateReport)
+    update_check_toggled = QtCore.Signal()
 
     GH_RELEASE_URL = (
         "https://api.github.com/repos/freedomofpress/dangerzone/releases/latest"
@@ -176,6 +177,7 @@ def should_check_for_updates(self) -> bool:
         if self.check is None:
             log.debug("User has not been asked yet for update checks")
             self.check = self.prompt_for_checks()
+            self.update_check_toggled.emit()
             return bool(self.check)
         elif not self.check:
             log.debug("User has expressed that they don't want to check for updates")