fixed bug #1238385, but no tests

Fixes: https://launchpad.net/bugs/1238385

openlp/core/ui/servicemanager.py

@@ -66,6 +66,12 @@ class ServiceManagerList(QtWidgets.QTreeWidget):
             elif event.key() == QtCore.Qt.Key_Down:
                 self.service_manager.on_move_selection_down()
                 event.accept()
+            elif event.key() == QtCore.Qt.Key_Right:
+                self.service_manager.on_expand_selection()
+                event.accept()
+            elif event.key() == QtCore.Qt.Key_Left:
+                self.service_manager.on_collapse_selection()
+                event.accept()
             elif event.key() == QtCore.Qt.Key_Delete:
                 self.service_manager.on_delete_from_service()
                 event.accept()
@@ -1119,6 +1125,37 @@ class ServiceManager(OpenLPMixin, RegistryMixin, QtWidgets.QWidget, Ui_ServiceMa
             return
         self.service_manager_list.setCurrentItem(item_after)
 
+    def on_expand_selection(self):
+        """
+        Expands cursor selection on the window. Called by the right arrow
+        """
+        item = self.service_manager_list.currentItem()
+
+        if item.childCount(): # Since we only have 2 levels we find them by checking for children
+            if not self.service_manager_list.isExpanded(self.service_manager_list.currentIndex()):
+                self.service_manager_list.expandItem(item)
+                self.service_manager.expanded(item)
+                # If not expanded, Expand it
+
+            self.service_manager_list.setCurrentItem(self.service_manager_list.itemBelow(item))
+            # Then move selection down to child whether it needed to be expanded or not
+
+    def on_collapse_selection(self):
+        """
+        Collapses cursor selection on the window Called by the left arrow
+        """
+        item = self.service_manager_list.currentItem()
+
+        if item.childCount():  # Since we only have 2 levels we find them by checking for children
+            if self.service_manager_list.isExpanded(self.service_manager_list.currentIndex()):
+                self.service_manager_list.collapseItem(item)
+                self.service_manager.collapsed(item)
+
+        else:  # If selection is lower level
+            self.service_manager_list.collapseItem(item.parent())
+            self.service_manager.collapsed(item.parent())
+            self.service_manager_list.setCurrentItem(item.parent())
+
     def on_collapse_all(self, field=None):
         """
         Collapse all the service items.

tests/interfaces/openlp_core_ui/test_servicemanager.py

@@ -28,9 +28,11 @@ from unittest.mock import MagicMock, patch
 from openlp.core.common import Registry
 from openlp.core.lib import ScreenList, ServiceItem, ItemCapabilities
 from openlp.core.ui.mainwindow import MainWindow
+from openlp.core.ui.servicemanager import ServiceManagerList
+from openlp.core.lib.serviceitem import ServiceItem
 
 from tests.helpers.testmixin import TestMixin
-
+from PyQt5 import QtCore, QtGui, QtTest
 
 class TestServiceManager(TestCase, TestMixin):
 
@@ -351,3 +353,38 @@ class TestServiceManager(TestCase, TestMixin):
         new_service.trigger()
 
         assert mocked_event.call_count == 1, 'The on_new_service_clicked method should have been called once'
+
+    def test_keyboard_expand_selection(self):
+        """
+        Test on on_expand_selection method caused by keyboard
+        """
+        # GIVEN A collapsed song selected on the service manager.
+        self.service_manager.setup_ui(self.service_manager)
+        ServiceManagerList(self.service_manager)
+
+        item = ServiceItem()
+        item.title = "test"
+        item.add_from_text("slide 1")
+        item.add_from_text("slide 2")
+        item.add_icon(":/plugins/plugin_songs.png")
+        #SongMediaItem.generate_slide_data(item)
+        self.service_manager.add_service_item(item)
+
+        print(item._raw_frames)
+
+        song_to_expand = self.service_manager.service_manager_list.topLevelItem(0)
+        #print(song_to_expand)
+        self.service_manager.service_manager_list.setCurrentItem(song_to_expand)
+        #print(self.service_manager.service_manager_list.currentItem())
+        #print(self.service_manager.service_manager_list.topLevelItemCount())
+
+        # WHEN Pressing the right arrow key
+        #QtTest.QTest.keyPress(self.service_manager.service_manager_list, QtCore.Qt.Key_Right)
+
+        event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress,QtCore.Qt.Key_Right,QtCore.Qt.NoModifier)
+        ServiceManagerList.keyPressEvent(self.service_manager,event)
+
+        # THEN Should be expanded
+        selected_index = self.service_manager.service_manager_list.currentIndex()
+        above_selection_index = self.service_manager.service_manager_list.indexAbove(selected_index)
+        self.assertTrue(self.service_manager.service_manager_list.isExpanded(above_selection_index), 'Item should have been expanded')