clean up alertsmanager

- the alertsmanager does not manage the alerts anymore, they are managed by the display
- thus the list of alerts is not needed, the id is not needed, also the
  timer id is not needed
- live_display_active is not needed anymore
- there is no point in using the status message

openlp/core/display/window.py

@@ -413,9 +413,6 @@ class DisplayWindow(QtWidgets.QWidget, RegistryProperties, LogMixin):
         if self.isHidden():
             self.setVisible(True)
         self.hide_mode = None
-        # Trigger actions when display is active again.
-        if self.is_display:
-            Registry().execute('live_display_active')
 
     def hide_display(self, mode=HideMode.Screen):
         """

openlp/plugins/alerts/lib/alertsmanager.py

@@ -26,7 +26,6 @@ import json
 
 from PyQt5 import QtCore, QtGui
 
-from openlp.core.common.i18n import translate
 from openlp.core.common.mixins import LogMixin, RegistryProperties
 from openlp.core.common.registry import Registry, RegistryBase
 from openlp.core.display.screens import ScreenList
@@ -40,9 +39,6 @@ class AlertsManager(QtCore.QObject, RegistryBase, LogMixin, RegistryProperties):
 
     def __init__(self, parent):
         super(AlertsManager, self).__init__()
-        self.timer_id = 0
-        self.alert_list = []
-        Registry().register_function('live_display_active', self.generate_alert)
         Registry().register_function('alerts_text', self.alert_text)
         self.alerts_text.connect(self.alert_text)
 
@@ -65,56 +61,25 @@ class AlertsManager(QtCore.QObject, RegistryBase, LogMixin, RegistryProperties):
 
         :param text: The text to display
         """
-        self.log_debug('display alert called {text}'.format(text=text))
+        self.log_debug(f'display alert called "{text}"')
-        if text:
+        if not text:
-            self.alert_list.append(text)
-            if self.timer_id != 0:
-                self.main_window.show_status_message(
-                    translate('AlertsPlugin.AlertsManager', 'Alert message created and displayed.'))
             return
-            self.main_window.show_status_message('')
+        if len(ScreenList()) == 1 and not self.settings.value('core/display on monitor'):
-            self.generate_alert()
-
-    def generate_alert(self):
-        """
-        Format and request the Alert and start the timer.
-        """
-        if not self.alert_list or (len(ScreenList()) == 1 and
-                                   not self.settings.value('core/display on monitor')):
             return
-        text = self.alert_list.pop(0)
-
-        # Get the rgb color format of the font & background hex colors from settings
-        rgb_font_color = self.hex_to_rgb(QtGui.QColor(self.settings.value('alerts/font color')))
-        rgb_background_color = self.hex_to_rgb(QtGui.QColor(self.settings.value('alerts/background color')))
-
         # Put alert settings together in dict that will be passed to Display in Javascript
         alert_settings = {
-            'backgroundColor': rgb_background_color,
+            'backgroundColor': self._hex_to_rgb(QtGui.QColor(self.settings.value('alerts/background color'))),
             'location': self.settings.value('alerts/location'),
             'fontFace': self.settings.value('alerts/font face'),
             'fontSize': self.settings.value('alerts/font size'),
-            'fontColor': rgb_font_color,
+            'fontColor': self._hex_to_rgb(QtGui.QColor(self.settings.value('alerts/font color'))),
             'timeout': self.settings.value('alerts/timeout'),
             'repeat': self.settings.value('alerts/repeat'),
             'scroll': self.settings.value('alerts/scroll')
         }
-        self.live_controller.displays[0].alert(text, json.dumps(alert_settings))
+        self.live_controller.display.alert(text, json.dumps(alert_settings))
 
-    def timerEvent(self, event):
+    def _hex_to_rgb(self, rgb_values):
-        """
-        Time has finished so if our time then request the next Alert if there is one and reset the timer.
-
-        :param event: the QT event that has been triggered.
-        """
-        if event.timerId() == self.timer_id:
-            alert_tab = self.parent().settings_tab
-            self.live_controller.display.alert('', alert_tab.location)
-        self.killTimer(self.timer_id)
-        self.timer_id = 0
-        self.generate_alert()
-
-    def hex_to_rgb(self, rgb_values):
         """
         Converts rgb color values from QColor to rgb string
 

tests/openlp_core/display/test_window.py

@@ -483,7 +483,6 @@ def test_show_display(mocked_screenlist, mocked_registry_execute, display_window
     # THEN: Should show the display and set the hide mode to none
     display_window.setVisible.assert_called_once_with(True)
     display_window.run_javascript.assert_called_once_with('Display.show();')
-    mocked_registry_execute.assert_called_once_with('live_display_active')
 
 
 @patch('openlp.core.display.window.ScreenList')