v1.4.0: digit-only flaps with white euro text, nixie white euro + configurable flicker, mode-conditional config fields; fix stale derived-property reads in change handler

contents/ui/DisplayNixie.qml

@@ -1,7 +1,10 @@
 /*
  * Nixie tube display mode — retro amber glowing digits in glass tubes.
  * Glow is faked with layered text copies, so no QtGraphicalEffects
- * dependency. Pure QtQuick: testable outside the plasmoid shell.
+ * dependency. Tubes flicker randomly (nixie cathode style); the
+ * flicker intensity is configurable (0 = off, 100 = nervous).
+ * The euro sign is rendered as plain text (default font, white).
+ * Pure QtQuick: testable outside the plasmoid shell.
  */
 
 import QtQuick 2.15
@@ -12,12 +15,26 @@ Row {
     // wired by the parent loader
     property string display: "--"
     property color trendColor: "#9e9e9e"
+    // 0 = no flicker, 100 = frequent and deep flicker
+    property int flickerIntensity: 40
 
     spacing: height * 0.05
 
-    readonly property string digits: display.replace(/[^0-9]/g, "")
+    function digitsOf(s) {
+        var out = "";
+        for (var i = 0; i < s.length; i++) {
+            var ch = s.charAt(i);
+            if (ch >= "0" && ch <= "9") {
+                out += ch;
+            }
+        }
+        return out;
+    }
+
+    readonly property string digits: digitsOf(display)
     readonly property real tubeWidth: height * 0.52
     readonly property real glowFont: height * 0.80
+    readonly property bool flickerOn: flickerIntensity > 0 && digits.length > 0
 
     Repeater {
         model: root.digits.length
@@ -48,71 +65,86 @@ Row {
                 opacity: 0.06
             }
 
-            Text {
-                id: glowText
-                anchors.centerIn: parent
-                text: root.digits[index]
-                color: "#ffb648"
-                font.family: "DejaVu Serif"
-                font.pixelSize: root.glowFont
+            // digit + glow layers, flickered as one group
+            Item {
+                id: glowGroup
+                anchors.fill: parent
 
-                // layered glow: two scaled copies behind the crisp digit
                 Text {
+                    id: glowText
                     anchors.centerIn: parent
-                    text: parent.text
-                    color: "#ff8c00"
-                    opacity: 0.30
-                    font: parent.font
-                    scale: 1.24
+                    text: root.digits[index]
+                    color: "#ffb648"
+                    font.family: "DejaVu Serif"
+                    font.pixelSize: root.glowFont
+
+                    // layered glow: two scaled copies behind the crisp digit
+                    Text {
+                        anchors.centerIn: parent
+                        text: parent.text
+                        color: "#ff8c00"
+                        opacity: 0.30
+                        font: parent.font
+                        scale: 1.24
+                    }
+                    Text {
+                        anchors.centerIn: parent
+                        text: parent.text
+                        color: "#ff9d1e"
+                        opacity: 0.50
+                        font: parent.font
+                        scale: 1.10
+                    }
                 }
-                Text {
-                    anchors.centerIn: parent
-                    text: parent.text
-                    color: "#ff9d1e"
-                    opacity: 0.50
-                    font: parent.font
-                    scale: 1.10
+            }
+
+            // nixie flicker: random dropout of the cathode glow
+            Timer {
+                id: flickTimer
+                repeat: false
+                running: root.flickerOn
+                onTriggered: {
+                    flick.restart();
+                    scheduleNext();
                 }
 
-                // occasional gentle nixie flicker
-                Timer {
-                    interval: 2200 + Math.random() * 3200
-                    repeat: false
-                    running: root.visible && root.digits.length > 0
-                    onTriggered: {
-                        flick.stop();
-                        flick.start();
-                        interval = 2200 + Math.random() * 3200;
-                        restart();
+                function scheduleNext() {
+                    // intensity 40 -> ~4 s between flicks, 100 -> ~1.5 s
+                    var base = 6000 - root.flickerIntensity * 45;
+                    interval = Math.max(700, base * (0.6 + Math.random() * 0.8));
+                }
+
+                Component.onCompleted: scheduleNext()
+            }
+
+            SequentialAnimation {
+                id: flick
+                ScriptAction {
+                    script: {
+                        var range = root.flickerIntensity / 100 * 0.75;
+                        glowGroup.opacity = 1 - (0.15 + Math.random() * range);
                     }
                 }
-                SequentialAnimation {
-                    id: flick
-                    NumberAnimation {
-                        target: glowText
-                        property: "opacity"
-                        to: 0.82
-                        duration: 70
-                    }
-                    NumberAnimation {
-                        target: glowText
-                        property: "opacity"
-                        to: 1.0
-                        duration: 140
-                    }
+                PauseAnimation { duration: 40 + Math.random() * 140 }
+                NumberAnimation {
+                    target: glowGroup
+                    property: "opacity"
+                    to: 1.0
+                    duration: 90 + Math.random() * 160
+                    easing.type: Easing.OutQuad
                 }
             }
         }
     }
 
-    // currency indicator, dim amber like an indicator lamp
+    // euro sign in the plain-text font, white
     Text {
         anchors.verticalCenter: parent.verticalCenter
         text: "\u20AC"
-        color: "#8a5a20"
-        font.family: "DejaVu Serif"
-        font.pixelSize: root.glowFont * 0.6
         visible: root.digits.length > 0
+        color: "#ffffff"
+        font.family: Qt.application.font.family
+        font.pixelSize: root.height * 0.60
     }
 
     // error / empty state