Load the system monitor screen on demand

This reduces the total amount of QObjects when starting Neptune by about
3k/25%, and that's even with the not exactly cheap Qt 3D integration
enabled. This also considerably reduces idle load as the system monitor
triggers a huge amount of binding updates even while not being visible.

Change-Id: I2671239ac06f3a6f94a9021ed8fc62b4602c73d7
Reviewed-by: Dominik Holland <dominik.holland@pelagicore.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/sysui/Cloud/Settings/SettingsScreen.qml b/sysui/Cloud/Settings/SettingsScreen.qml
index cf1af84..d2b4936 100644
--- a/sysui/Cloud/Settings/SettingsScreen.qml
+++ b/sysui/Cloud/Settings/SettingsScreen.qml
@@ -68,7 +68,8 @@ UIElement {
                         SettingsService.unitSystem = "metric"
                 }
                 else if (titleText === "SYSTEM MONITOR") {
-                    ApplicationManagerInterface.applicationSurfaceReady(systemMonitor)
+                    systemMonitorLoader.active = true
+                    ApplicationManagerInterface.applicationSurfaceReady(systemMonitorLoader.item)
                 }
             }
         }
@@ -82,8 +83,14 @@ UIElement {
         visible: false
     }
 
-    MainScreen {
-        id: systemMonitor
-        visible: false
+    Loader {
+        id: systemMonitorLoader
+        active: false
+        sourceComponent: Component {
+            MainScreen {
+                id: systemMonitor
+                visible: false
+            }
+        }
     }
 }