[plasma/plasma-bigscreen] kcms/bluetooth/ui: kcms/bluetooth: add placeholder message if no Bluetooth adapters could be found

Git commit 1872c5b8b515979f0a2b47747049bf8160896649 by Devin Lin, on behalf of User8395.
Committed on 30/07/2026 at 02:53.
Pushed by devinlin into branch 'master'.

kcms/bluetooth: add placeholder message if no Bluetooth adapters could be found

BUG: 518976

I haven't tested this with inserting a USB adapter since I turned off Bluetooth from my BIOS.

![image](/uploads/4233ebd8c7f623cb22a3c8aa53c7caa9/image.png){width=900 height=563}

M  +12   -0    kcms/bluetooth/ui/main.qml

https://invent.kde.org/plasma/plasma-bigscreen/-/commit/1872c5b8b515979f0a2b47747049bf8160896649

diff --git a/kcms/bluetooth/ui/main.qml b/kcms/bluetooth/ui/main.qml
index 99ec19d2..c7f3df0c 100644
--- a/kcms/bluetooth/ui/main.qml
+++ b/kcms/bluetooth/ui/main.qml
@@ -58,7 +58,19 @@ Bigscreen.ScrollablePage {
         sourceModel: BluezQt.DevicesModel {}
     }
 
+    Kirigami.PlaceholderMessage {
+        id: noBluetoothMessage
+        // We cannot use the adapter count here because that can be zero when
+        // bluetooth is disabled even when there are physical devices
+        visible: BluezQt.Manager.rfkill.state === BluezQt.Rfkill.Unknown
+        icon.name: "edit-none"
+        text: i18n("No Bluetooth adapters found")
+        explanation: i18n("Connect an external Bluetooth adapter")
+        anchors.centerIn: parent
+    }
+
     ColumnLayout {
+        visible: !noBluetoothMessage.visible
         KeyNavigation.left: bluetoothView.KeyNavigation.left
         id: column
         spacing: 0