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

README.md

@@ -10,11 +10,12 @@ Three display styles, configurable in the settings dialog:
 | Style | Description |
 |---|---|
 | *Plain text* | Trend-colored text (green/red/grey) |
-| *Split-flap board* | Airport board: white characters on black flaps, cascading flip animation on price changes, trend LED |
-| *Nixie tubes* | Retro amber glowing digits in glass tubes (with a soft flicker), trend LED |
+| *Split-flap board* | Airport board: white digit flaps, white € sign in the default font, cascading flip animation on price changes (configurable duration), trend LED |
+| *Nixie tubes* | Retro amber glowing digits in glass tubes with configurable random flicker, white € sign in the default font, trend LED |
 
 In the split-flap and nixie styles the digits keep their display color and the
 trend (up/down/unchanged) is shown on a small LED next to the display.
+Display style changes apply immediately, without restarting the shell.
 
 | Situation | Plain text color | Trend LED |
 |---|---|---|
@@ -32,19 +33,25 @@ representations.
 - **Refresh interval (minutes)** — default 5, minimum **5**, maximum 1440.
   The 5-minute floor exists because the CoinGecko API allows one request per
   5 minutes. A hint text in the config dialog explains this.
+- **Split-flap cascade (seconds)** — default 3, range 1–15. Spreads the flip
+  animation of a price change evenly over this many seconds (applies to the
+  split-flap display style). Only shown when that style is selected.
+- **Nixie flicker (0 = off)** — default 40, range 0–100. Random cathode-dropout
+  flicker of the nixie tubes; 0 disables it, higher values flicker more often
+  and deeper. Only shown when the nixie style is selected.
 
 Configurable via right-click on the widget → *Configure Bitcoin Price…* → *General*.
 
 ## Installation
 
 ### Graphical
-Double-click `bitcoin-price-1.2.0.plasmoid` in Dolphin (Plasma installs it to
+Double-click `bitcoin-price-1.3.0.plasmoid` in Dolphin (Plasma installs it to
 `~/.local/share/plasma/plasmoids/` automatically). The latest build is attached
-to the [v1.2.0 release](../../releases/tag/v1.2.0).
+to the [v1.3.0 release](../../releases/tag/v1.2.0).
 
 ### Terminal
 ```bash
-kpackagetool5 --type Plasma/Applet --upgrade bitcoin-price-1.2.0.plasmoid
+kpackagetool5 --type Plasma/Applet --upgrade bitcoin-price-1.3.0.plasmoid
 # Then restart the shell if needed:
 plasmashell --replace &
 ```

contents/config/main.xml

@@ -14,6 +14,18 @@
       </choices>
       <default>0</default>
     </entry>
+    <entry name="flapSeconds" type="Int">
+      <label>Seconds over which the split-flap cascade spreads a price change</label>
+      <default>3</default>
+      <min>1</min>
+      <max>15</max>
+    </entry>
+    <entry name="nixieFlicker" type="Int">
+      <label>Nixie tube flicker intensity (0 = off, 100 = frequent and deep)</label>
+      <default>40</default>
+      <min>0</min>
+      <max>100</max>
+    </entry>
     <entry name="refreshMinutes" type="Int">
       <label>Refresh interval in minutes (minimum 5 because of the CoinGecko rate limit)</label>
       <default>5</default>

contents/ui/DisplayFlip.qml

@@ -1,7 +1,9 @@
 /*
  * Split-flap display mode — airport departure board style.
- * White characters on black cells with a flap split line;
- * changed characters flip with a cascading animation.
+ * Only digits are shown as flaps; the euro sign is rendered as plain
+ * text (default font, white) next to the board, and the trend shows
+ * on a small LED. Changed characters flip with a cascading animation
+ * spread over the configured number of seconds.
  * Pure QtQuick so it can be tested outside the plasmoid shell.
  */
 
@@ -13,16 +15,37 @@ Row {
     // wired by the parent loader
     property string display: "--"
     property color trendColor: "#9e9e9e"
+    // seconds over which the cascade to a new price is spread
+    property int flapSeconds: 3
 
     spacing: height * 0.06
 
+    function digitsOf(s) {
+        var out = "";
+        for (var i = 0; i < s.length; i++) {
+            var ch = s.charAt(i);
+            if ((ch >= "0" && ch <= "9") || ch === "-") {
+                out += ch;
+            }
+        }
+        return out;
+    }
+
+    // UI-only derived values (euro visibility); logic must not rely on these —
+    // QML gives no ordering guarantee between a change handler and the
+    // re-evaluation of dependent bindings.
+    readonly property string digitsOnly: digitsOf(display)
+    readonly property string boardText: digitsOnly.length > 0 ? digitsOnly : "--"
+
     property var chars: []
     property bool ready: false
     readonly property real cellFont: height * 0.72
     readonly property real cellWidth: cellFont * 0.80
+    // one flap open+close takes 260 ms; keep delays above that
+    readonly property int flapDuration: 260
 
     Component.onCompleted: {
-        chars = display.split("");
+        chars = boardText.split("");
         ready = true;
     }
 
@@ -30,17 +53,27 @@ Row {
         if (!ready) {
             return;
         }
-        var nc = display.split("");
+        // compute from display directly: derived bindings may still be
+        // stale at this point (QML makes no ordering guarantee)
+        var digits = digitsOf(display);
+        var nc = (digits.length > 0 ? digits : "--").split("");
         var n = Math.max(chars.length, nc.length);
+        // spread the changed cells evenly across flapSeconds
+        var changed = [];
         for (var i = 0; i < n; i++) {
             var from = i < chars.length ? chars[i] : "";
             var to = i < nc.length ? nc[i] : "";
             if (from !== to) {
-                var cell = rep.itemAt(i);
-                if (cell) {
-                    cell.flipTo(to, i * 45);
+                changed.push([i, to]);
             }
         }
+        var span = Math.max(1, flapSeconds) * 1000 - flapDuration;
+        var step = changed.length > 1 ? Math.max(0, Math.floor(span / (changed.length - 1))) : 0;
+        for (var j = 0; j < changed.length; j++) {
+            var cell = rep.itemAt(changed[j][0]);
+            if (cell) {
+                cell.flipTo(changed[j][1], j * step);
+            }
         }
         chars = nc;
     }
@@ -130,8 +163,17 @@ Row {
         }
     }
 
-    // trend LED (green/red/grey) — boards are monochrome, so the
-    // trend shows here instead of in the letter color
+    // euro sign in the plain-text font, white
+    Text {
+        anchors.verticalCenter: parent.verticalCenter
+        text: "\u20AC"
+        visible: root.digitsOnly.length > 0
+        color: "#ffffff"
+        font.family: Qt.application.font.family
+        font.pixelSize: root.height * 0.66
+    }
+
+    // trend LED (green/red/grey)
     Rectangle {
         width: root.height * 0.14
         height: width

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
@@ -48,6 +65,11 @@ Row {
                 opacity: 0.06
             }
 
+            // digit + glow layers, flickered as one group
+            Item {
+                id: glowGroup
+                anchors.fill: parent
+
                 Text {
                     id: glowText
                     anchors.centerIn: parent
@@ -73,46 +95,56 @@ Row {
                         font: parent.font
                         scale: 1.10
                     }
+                }
+            }
 
-                // occasional gentle nixie flicker
+            // nixie flicker: random dropout of the cathode glow
             Timer {
-                    interval: 2200 + Math.random() * 3200
+                id: flickTimer
                 repeat: false
-                    running: root.visible && root.digits.length > 0
+                running: root.flickerOn
                 onTriggered: {
-                        flick.stop();
-                        flick.start();
-                        interval = 2200 + Math.random() * 3200;
-                        restart();
+                    flick.restart();
+                    scheduleNext();
                 }
+
+                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
-                    NumberAnimation {
-                        target: glowText
-                        property: "opacity"
-                        to: 0.82
-                        duration: 70
+                ScriptAction {
+                    script: {
+                        var range = root.flickerIntensity / 100 * 0.75;
+                        glowGroup.opacity = 1 - (0.15 + Math.random() * range);
                     }
+                }
+                PauseAnimation { duration: 40 + Math.random() * 140 }
                 NumberAnimation {
-                        target: glowText
+                    target: glowGroup
                     property: "opacity"
                     to: 1.0
-                        duration: 140
-                    }
+                    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

contents/ui/configGeneral.qml

@@ -2,6 +2,7 @@
  * Config page for nl.a14r.bitcoinprice.
  * Follows the canonical Plasma 5 config dialog pattern:
  * Kirigami.FormLayout + cfg_ prefixed property aliases.
+ * Mode-specific settings are only visible for the matching style.
  */
 
 import QtQuick 2.15
@@ -14,6 +15,8 @@ Kirigami.FormLayout {
     // The cfg_ prefix is what Plasma uses to read/write plasmoid.configuration
     property alias cfg_displayMode: modeCombo.currentIndex
     property alias cfg_refreshMinutes: intervalSpin.value
+    property alias cfg_flapSeconds: flapSpin.value
+    property alias cfg_nixieFlicker: flickSpin.value
 
     Item {
         Kirigami.FormData.isSection: true
@@ -25,6 +28,26 @@ Kirigami.FormLayout {
         model: [i18n("Plain text"), i18n("Split-flap board"), i18n("Nixie tubes")]
     }
 
+    QQC2.SpinBox {
+        id: flapSpin
+        visible: modeCombo.currentIndex === 1
+        Kirigami.FormData.label: i18n("Split-flap cascade (seconds):")
+        from: 1
+        to: 15
+        stepSize: 1
+        editable: true
+    }
+
+    QQC2.SpinBox {
+        id: flickSpin
+        visible: modeCombo.currentIndex === 2
+        Kirigami.FormData.label: i18n("Nixie flicker (0 = off):")
+        from: 0
+        to: 100
+        stepSize: 10
+        editable: true
+    }
+
     QQC2.SpinBox {
         id: intervalSpin
         Kirigami.FormData.label: i18n("Refresh interval (minutes):")

contents/ui/main.qml

@@ -25,11 +25,32 @@ Item {
 
     readonly property int refreshMinutes: Math.max(5, plasmoid.configuration.refreshMinutes)
 
+    // Seconds over which the split-flap display cascades to a new price
+    readonly property int flapSeconds: Math.max(1, plasmoid.configuration.flapSeconds)
+
+    // Nixie tube flicker intensity (0 = off, 100 = frequent and deep)
+    readonly property int nixieFlicker: Math.max(0, Math.min(100, plasmoid.configuration.nixieFlicker))
+
     // 0 = plain text, 1 = split-flap board, 2 = nixie tubes
     property int displayMode: 0
     readonly property string modeSource: displayMode === 1 ? "DisplayFlip.qml"
                                         : displayMode === 2 ? "DisplayNixie.qml"
                                         : "DisplayText.qml"
+
+    // Enum config values arrive either as an int index or as the choice
+    // name, depending on the Plasma version — accept both.
+    function modeFromConfig(v) {
+        if (typeof v === "number") {
+            return Math.max(0, Math.min(2, Math.round(v)));
+        }
+        if (v === "SplitFlap") {
+            return 1;
+        }
+        if (v === "Nixie") {
+            return 2;
+        }
+        return 0;
+    }
     readonly property string apiUrl: "https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=eur"
 
     // -1 = down, 0 = unchanged / no previous reading yet, 1 = up
@@ -72,7 +93,10 @@ Item {
 
     Component.onCompleted: {
         try {
-            displayMode = Math.max(0, Math.min(2, plasmoid.configuration.displayMode));
+            // live binding: config changes from the dialog apply immediately
+            displayMode = Qt.binding(function () {
+                return modeFromConfig(plasmoid.configuration.displayMode);
+            });
         } catch (e) {
             // outside a real plasmoid shell (tests): keep the default
         }
@@ -119,6 +143,12 @@ Item {
                     onLoaded: {
                         item.display = Qt.binding(function () { return root.displayText; });
                         item.trendColor = Qt.binding(function () { return root.priceColor; });
+                        if (item.flapSeconds !== undefined) {
+                            item.flapSeconds = Qt.binding(function () { return root.flapSeconds; });
+                        }
+                        if (item.flickerIntensity !== undefined) {
+                            item.flickerIntensity = Qt.binding(function () { return root.nixieFlicker; });
+                        }
                     }
                 }
             }
@@ -154,6 +184,12 @@ Item {
                     onLoaded: {
                         item.display = Qt.binding(function () { return root.displayText; });
                         item.trendColor = Qt.binding(function () { return root.priceColor; });
+                        if (item.flapSeconds !== undefined) {
+                            item.flapSeconds = Qt.binding(function () { return root.flapSeconds; });
+                        }
+                        if (item.flickerIntensity !== undefined) {
+                            item.flickerIntensity = Qt.binding(function () { return root.nixieFlicker; });
+                        }
                     }
                 }
 

metadata.desktop

@@ -10,7 +10,7 @@ X-KDE-ServiceTypes=Plasma/Applet
 X-KDE-PluginInfo-Author=Arnold Cordewiner
 X-KDE-PluginInfo-Email=hermes@a14r.be
 X-KDE-PluginInfo-Name=nl.a14r.bitcoinprice
-X-KDE-PluginInfo-Version=1.2.0
+X-KDE-PluginInfo-Version=1.4.0
 X-KDE-PluginInfo-Website=https://gitea.a14r.be/hermes/plasma-bitcoin-price
 X-KDE-PluginInfo-Category=Utilities
 X-KDE-PluginInfo-License=MIT