kcms/nightcolor: Show loading text instead of zero coordinates

Both coordinates being exactly zero indicates that location data is still
loading. So show loading text instead of spurious coordinates and calculated
timings.

kcms/nightcolor/package/contents/ui/main.qml

@@ -8,7 +8,7 @@ import QtQuick 2.15
 import QtQuick.Layouts 1.1
 import QtQuick.Controls 2.5 as QQC2
 
-import org.kde.kirigami 2.5 as Kirigami
+import org.kde.kirigami 2.19 as Kirigami
 import org.kde.kcm 1.5 as KCM
 
 import org.kde.colorcorrect 0.1 as CC
@@ -20,6 +20,7 @@ KCM.SimpleKCM {
     property int error: cA.error
     property bool defaultRequested: false
     property var locator
+    readonly property bool doneLocating: locator !== undefined && !(locator.latitude == 0 && locator.longitude == 0)
     implicitHeight: Kirigami.Units.gridUnit * 29
     implicitWidth: Kirigami.Units.gridUnit * 35
 
@@ -258,6 +259,7 @@ KCM.SimpleKCM {
             // Show current location in auto mode
             QQC2.Label {
                 visible: kcm.nightColorSettings.mode === NightColorMode.Automatic && kcm.nightColorSettings.active
+                    && root.doneLocating
                 enabled: activator.checked
                 wrapMode: Text.Wrap
                 text: i18n("Latitude: %1°   Longitude: %2°", Math.round(locator.latitude * 100)/100, Math.round(locator.longitude * 100)/100)
@@ -372,15 +374,29 @@ KCM.SimpleKCM {
         }
 
         // Show start/end times in automatic and manual location modes
-        TimingsView {
-            id: timings
-            visible: (kcm.nightColorSettings.mode === NightColorMode.Automatic ||
-                kcm.nightColorSettings.mode === NightColorMode.Location) && kcm.nightColorSettings.active
+        Item {
+            visible: kcm.nightColorSettings.mode === NightColorMode.Automatic || kcm.nightColorSettings.mode === NightColorMode.Location
+                && kcm.nightColorSettings.active
             Layout.topMargin: Kirigami.Units.largeSpacing * 4
             Layout.alignment: Qt.AlignHCenter
-            enabled: kcm.nightColorSettings.active
-            latitude: kcm.nightColorSettings.mode === NightColorMode.Automatic ? locator.latitude : kcm.nightColorSettings.latitudeFixed
-            longitude: kcm.nightColorSettings.mode === NightColorMode.Automatic ? locator.longitude : kcm.nightColorSettings.longitudeFixed
+
+            Kirigami.LoadingPlaceholder {
+                visible: kcm.nightColorSettings.mode === NightColorMode.Automatic && (!locator || !root.doneLocating)
+                text: i18nc("@info:placeholder", "Locating…")
+                anchors.centerIn: parent
+            }
+
+            TimingsView {
+                id: timings
+                visible: kcm.nightColorSettings.mode === NightColorMode.Location ||
+                    (kcm.nightColorSettings.mode === NightColorMode.Automatic && root.doneLocating)
+                anchors.centerIn: parent
+                enabled: kcm.nightColorSettings.active
+                latitude: kcm.nightColorSettings.mode === NightColorMode.Automatic
+                    && (locator !== undefined) ? locator.latitude : kcm.nightColorSettings.latitudeFixed
+                longitude: kcm.nightColorSettings.mode === NightColorMode.Automatic
+                    && (locator !== undefined) ? locator.longitude : kcm.nightColorSettings.longitudeFixed
+            }
         }
     }
 }