lockscreen: Improve physical keyboard input

look-and-feel/contents/lockscreen/Keypad.qml

@@ -21,6 +21,8 @@ Rectangle {
     
     required property var lockScreenState
     
+    property alias passwordBar: passwordBar
+    
     // 0 - keypad is not shown, 1 - keypad is shown
     property double swipeProgress
     
@@ -50,25 +52,6 @@ Rectangle {
             easing.type: Easing.InOutQuad
         }
     }
-    
-    // listen for keyboard events
-    Keys.onPressed: {
-        if (event.modifiers === Qt.NoModifier) {
-            if (event.key === Qt.Key_Backspace) {
-                passwordBar.backspace();
-            } else if (event.key === Qt.Key_Return || event.key === Qt.Key_Enter) {
-                passwordBar.enter();
-            } else if (event.text != "") {
-                passwordBar.keyPress(event.text);
-            }
-        }
-
-        if (event.modifiers & Qt.ControlModifier) {
-            if (event.key === Qt.Key_Backspace) {
-                passwordBar.clear();
-            }
-        }
-    }
 
     RectangularGlow {
         anchors.topMargin: 1

look-and-feel/contents/lockscreen/LockScreen.qml

@@ -29,10 +29,19 @@ PlasmaCore.ColorScope {
     property bool notificationsShown: false
     
     readonly property bool drawerOpen: flickable.openFactor >= 1
+    property var passwordBar: keypadLoader.item.passwordBar
     
     colorGroup: PlasmaCore.Theme.ComplementaryColorGroup
     anchors.fill: parent
     
+    // listen for keyboard events, and focus on input area
+    Component.onCompleted: forceActiveFocus();
+    Keys.onPressed: {
+        passwordBar.isPinMode = false;
+        flickable.goToOpenPosition();
+        passwordBar.textField.forceActiveFocus();
+    }
+    
     // wallpaper blur 
     Loader {
         anchors.fill: parent
@@ -167,6 +176,7 @@ PlasmaCore.ColorScope {
             
             // password keypad
             Loader {
+                id: keypadLoader
                 width: parent.width
                 asynchronous: true
                 active: !root.lockScreenState.passwordless // only load keypad if not passwordless
@@ -174,8 +184,9 @@ PlasmaCore.ColorScope {
                 anchors.bottom: parent.bottom
                 
                 sourceComponent: ColumnLayout {
-                    transform: Translate { y: flickable.keypadHeight - flickable.position }
+                    property alias passwordBar: keypad.passwordBar
                     
+                    transform: Translate { y: flickable.keypadHeight - flickable.position }
                     spacing: 0
                     
                     // info notification text

look-and-feel/contents/lockscreen/PasswordBar.qml

@@ -20,6 +20,8 @@ Rectangle {
     
     required property var lockScreenState
     
+    property alias textField: textField
+    
     // toggle between pin and password mode
     property bool isPinMode: true