qml: pin lock after inactivity

electrum/gui/qml/components/Pin.qml

@@ -21,12 +21,15 @@ Dialog {
     modal: true
     parent: Overlay.overlay
     Overlay.modal: Rectangle {
-        color: "#aa000000"
+        color: canCancel ? "#aa000000" : "#ff000000"
     }
 
     focus: true
 
-    standardButtons: Dialog.Cancel
+    standardButtons: canCancel ? Dialog.Cancel : 0
+    closePolicy: canCancel ? Popup.CloseOnEscape | Popup.CloseOnPressOutside : Popup.NoAutoClose
+
+    property bool canCancel: true
 
     property string mode // [check, enter, change]
     property string pincode // old one passed in when change, new one passed out

electrum/gui/qml/components/main.qml

@@ -275,7 +275,7 @@ ApplicationWindow
     }
 
     function handleAuthRequired(qtobject, method) {
-        console.log('AUTHENTICATING USING METHOD ' + method)
+        console.log('auth using method ' + method)
         if (method == 'wallet') {
             if (Daemon.currentWallet.verify_password('')) {
                 // wallet has no password
@@ -309,6 +309,34 @@ ApplicationWindow
                 })
                 dialog.open()
             }
+        } else {
+            console.log('unknown auth method ' + method)
+            qtobject.authCancel()
+        }
+    }
+
+    property var _lastActive: 0 // record time of last activity
+    property int _maxInactive: 30 // seconds
+    property bool _lockDialogShown: false
+
+    onActiveChanged: {
+        console.log('active='+active)
+        if (!active) {
+            // deactivated
+            _lastActive = Date.now()
+        } else {
+            // activated
+            if (_lastActive != 0 && Date.now() - _lastActive > _maxInactive * 1000) {
+                if (_lockDialogShown || Config.pinCode == '')
+                    return
+                var dialog = app.pinDialog.createObject(app, {mode: 'check', canCancel: false, pincode: Config.pinCode})
+                dialog.accepted.connect(function() {
+                    dialog.close()
+                    _lockDialogShown = false
+                })
+                dialog.open()
+                _lockDialogShown = true
+            }
         }
     }