v1.6.0: arrow at 90%, euro+arrow bottom-aligned with the price, bitcoin icon at 110%

README.md

@@ -1,77 +1,113 @@
-# plasma-bitcoin-price
+# Bitcoin Price (Plasma 5 widget)
 
-KDE Plasma 5 widget die de bitcoinprijs in EUR toont, opgehaald bij de
+KDE Plasma 5 widget that shows the bitcoin price in EUR, fetched from the
 [CoinGecko API](https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=eur).
 
-## Weergave
+## Display styles
 
-| Situatie | Weergave |
+Three display styles, configurable in the settings dialog:
+
+| Style | Description |
 |---|---|
-| Prijs gestegen t.o.v. vorige meting | groen |
-| Prijs gedaald t.o.v. vorige meting | rood |
-| Prijs gelijk gebleven (of eerste meting) | grijs |
-| API-fout (netwerkfout, 4xx/5xx, rate limit 429) | `--` |
+| *Plain text* | Trend-colored text (green/red/grey) |
+| *Split-flap board* | Airport board: white digit flaps, white € sign and a trend arrow in the default font. On a price change all flaps first reset to 0 (swept over ~2 s), then take their new values — the whole cycle spreads over the configured cascade time |
+| *Nixie tubes* | Retro amber glowing digits in glass tubes with configurable random flicker, white € sign and a trend arrow in the default font |
 
-Formaat: `₿ 68.969 €` — duizendtallen volgens de systeemlocale, afgerond op hele euro's.
+In the split-flap and nixie styles a trend arrow sits right of the € sign:
+green ▲ when the price went up, red ▼ when it went down. When the price is
+unchanged the last arrow stays; on the very first reading (and on API errors)
+no arrow is shown. Display style changes apply immediately, without
+restarting the shell.
 
-## Configuratie
+| Situation | Plain text color | Arrow in flip/nixie modes |
+|---|---|---|
+| Price up | green | green ▲ |
+| Price down | red | red ▼ |
+| Price unchanged | grey | last arrow stays |
+| First reading / API failure | grey / `--` | no arrow |
 
-- **Vernieuwinterval (minuten)** — standaard 5, minimaal **5**, maximaal 1440.
-  Het minimum van 5 minuten komt door de CoinGecko rate limit van 1 call per 5 minuten.
+Format: `68,969 €` (thousands separators follow the system locale, rounded to
+whole euros) preceded by the bundled Bitcoin icon in the compact and full
+representations.
 
-Instelbaar via rechtsklik op de widget → *Configureer Bitcoin-prijs* → *Algemeen*.
+## Configuration
 
-## Installatie
+- **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.
 
-### Grafisch
-Dubbelklik op `dist/bitcoin-price-1.0.0.plasmoid` in Dolphin (Plasma installeert
-dan automatisch naar `~/.local/share/plasma/plasmoids/`).
+Configurable via right-click on the widget → *Configure Bitcoin Price…* → *General*.
+
+## Installation
+
+### Graphical
+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 [v1.3.0 release](../../releases/tag/v1.2.0).
 
 ### Terminal
 ```bash
-kpackagetool5 --type Plasma/Applet --install dist/bitcoin-price-1.0.0.plasmoid
-# widget toevoegen via Add Widgets; bij twijfel plasma herladen:
+kpackagetool5 --type Plasma/Applet --upgrade bitcoin-price-1.3.0.plasmoid
+# Then restart the shell if needed:
 plasmashell --replace &
 ```
 
-Verwijderen:
+Upgrading an already-installed widget requires `--upgrade` (`--install` fails
+when the plugin id already exists).
+
+Uninstall:
 ```bash
 kpackagetool5 --type Plasma/Applet --remove nl.a14r.bitcoinprice
 ```
 
-## Notities
+## Notes
 
-- De API-URL gebruikt `vs_currencies=eur`. In de oorspronkelijke opdracht stond
-  een `usd`-URL, maar de eis was "prijs t.o.v. de euro" met een `€`-teken; een
-  dollarwaarde onder een €-teken zou foutief zijn.
-- De trendvergelijking gebeurt tegen de laatst bekend geraakte prijs. Na een
-  API-fout blijft die referentie staan, zodat de kleur klopt zodra er weer
-  data binnenkomt.
-- Zonder CoinGecko API-key kan de API ook tussendoor een 429 geven; de widget
-  toont dan `--` tot de eerstvolgende geslaagde poll.
-- Getest op Debian 12 / Plasma 5 (Qt 5.15). Plasma 6 werkt vermoedelijk ook,
-  maar is niet getest.
+- The API URL uses `vs_currencies=eur`. The original request referenced a
+  `usd` URL, but the requirement was "price versus the euro" with a €-sign;
+  showing a dollar amount under a € sign would be wrong.
+- The trend comparison is made against the last known price. After an API
+  failure that reference is kept, so the color is correct again as soon as
+  fresh data arrives.
+- Without a CoinGecko API key the API may occasionally return 429; the widget
+  shows `--` until the next successful poll.
+- Tested on Plasma 5.27 / Qt 5.15. Plasma 6 is expected to work but is untested.
 
-## Repository-layout
+## Debugging
+
+The widget logs to the plasmashell journal:
+
+```bash
+journalctl --user -u plasma-plasmashell.service | grep bitcoinprice
+```
+
+Expected lines: `started, refresh interval: N minutes`, `fetched EUR <price>`,
+or `fetch failed, HTTP status: <code>`.
+
+## Repository layout
 
 ```
 metadata.desktop
 contents/
-├── config/main.xml          # config-schema (refreshMinutes, min 5, max 1440)
+├── config/
+│   ├── main.xml            # config schema (refreshMinutes, min 5, max 1440)
+│   └── config.qml          # config dialog registry (ConfigModel/ConfigCategory)
+├── images/bitcoin.svg      # bundled Bitcoin icon
 └── ui/
-    ├── main.qml             # widget + fetch/vergelijk-logica
-    ├── config.qml           # configuratievenster (categorieën)
-    └── configGeneral.qml    # interval-instelling
+    ├── main.qml             # widget + fetch/compare logic
+    └── configGeneral.qml    # interval setting page
 ```
 
-Het kant-en-klare installatiebestand (`bitcoin-price-1.0.0.plasmoid`) staat als
-bijlage bij de [v1.0.0-release](../../releases/tag/v1.0.0).
-
-Zelf (her)packagen:
+Repackage yourself:
 ```bash
 zip -r bitcoin-price.plasmoid metadata.desktop contents
 ```
 
-## Licentie
+## License
 
-MIT — zie [LICENSE](LICENSE).
+MIT — see [LICENSE](LICENSE).

contents/config/config.qml

@@ -3,7 +3,7 @@ import org.kde.plasma.configuration 2.0
 
 ConfigModel {
     ConfigCategory {
-        name: i18n("Algemeen")
+        name: i18n("General")
         icon: "preferences-desktop"
         source: "configGeneral.qml"
     }

contents/config/main.xml

@@ -5,6 +5,27 @@
       http://www.kde.org/standards/kcfg/1.0/kcfg.xsd">
   <kcfgfile name=""/>
   <group name="General">
+    <entry name="displayMode" type="Enum">
+      <label>Display style for the price</label>
+      <choices>
+        <choice name="PlainText"/>
+        <choice name="SplitFlap"/>
+        <choice name="Nixie"/>
+      </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/images/bitcoin.svg

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve" width="6.82666in" height="6.82666in" style="shape-rendering:geometricPrecision; text-rendering:geometricPrecision; image-rendering:optimizeQuality; fill-rule:evenodd; clip-rule:evenodd"
+viewBox="0 0 6.82666 6.82666"
+ xmlns:xlink="http://www.w3.org/1999/xlink">
+ <g id="Layer_x0020_1">
+  <g id="_372402152">
+   <circle id="_372402800" fill="#FF9800" cx="3.41333" cy="3.41333" r="2.56"/>
+   <path id="_372402824" fill="#FFFFFE" d="M3.87171 3.18776c0.0803346,0 0.155882,-0.0312795 0.212665,-0.0880945 0.0568189,-0.0568465 0.0880945,-0.132335 0.0880945,-0.212665 0,-0.0803425 -0.0312756,-0.155886 -0.088122,-0.212701 -0.0567795,-0.0567913 -0.132303,-0.0880669 -0.212638,-0.0880669l-0.827106 0 0 0.601528 0.827106 0zm0.0249606 1.50341l0 0.225992 -0.451146 0 0 -0.225575 -0.200461 0 0 0.225575 -0.45115 0 0 -0.225575 -0.350843 0 0 -0.45115 0.150382 0 0 -1.6542 -0.150382 0 0 -0.45115 0.350843 0 0 -0.225575 0.45115 0 0 0.225575 0.200461 0 0 -0.225575 0.451146 0 0 0.225992c0.191488,0.00620866 0.37061,0.0837126 0.506701,0.219803 0.142051,0.142051 0.220244,0.330874 0.220244,0.531697 0,0.198319 -0.0762953,0.384929 -0.214953,0.526335 0.138697,0.141421 0.214953,0.328024 0.214953,0.526339 0,0.200823 -0.0782205,0.389646 -0.220217,0.531661 -0.136118,0.136122 -0.31524,0.213626 -0.506728,0.219835zm-0.852067 -0.450732l0.827106 0c0.0803346,0 0.155882,-0.0312835 0.212665,-0.0880906 0.0568189,-0.0568465 0.0880945,-0.132343 0.0880945,-0.212673 0,-0.0803346 -0.0312756,-0.155886 -0.088122,-0.212705 -0.0567795,-0.0567795 -0.132303,-0.088063 -0.212638,-0.088063l-0.827106 0 0 0.601531z"/>
+  </g>
+ </g>
+</svg>

contents/ui/DisplayFlip.qml

@@ -0,0 +1,225 @@
+/*
+ * Split-flap display mode — airport departure board style.
+ * Only digits are shown as flaps; the euro sign is rendered as plain
+ * text (default font, white) next to the board, followed by a trend
+ * arrow (green up / red down; unchanged keeps the last arrow).
+ * On a price change the board first resets every flap to "0" (swept
+ * over ~2 s), then takes the new values (swept over the remainder of
+ * the cascade setting).
+ * Pure QtQuick so it can be tested outside the plasmoid shell.
+ */
+
+import QtQuick 2.15
+
+Row {
+    id: root
+
+    // wired by the parent loader
+    property string display: "--"
+    // 1 = up, -1 = down, 0 = unchanged -> keep showing the last arrow
+    property int trendDir: 0
+    property int lastDir: 0
+    onTrendDirChanged: {
+        if (trendDir !== 0) {
+            lastDir = trendDir;
+        }
+    }
+    // total seconds over which the reset-to-zero + new value cycle spreads
+    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/arrow 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 = boardText.split("");
+        ready = true;
+    }
+
+    onDisplayChanged: {
+        if (!ready) {
+            return;
+        }
+        // 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);
+
+        // Phase 1: every flap resets to "0", swept over ~2 s.
+        // Phase 2: every flap takes its new value, swept over the
+        // remainder of the total cascade time.
+        var total = Math.max(1, flapSeconds) * 1000;
+        var resetSpan = Math.min(2000, Math.floor(total * 2 / 3));
+        var valueStart = resetSpan;
+        var resetStep = n > 1 ? Math.floor(Math.max(0, resetSpan - flapDuration) / (n - 1)) : 0;
+        var valueStep = n > 1 ? Math.floor(Math.max(0, total - valueStart - flapDuration) / (n - 1)) : 0;
+
+        for (var i = 0; i < n; i++) {
+            var cell = rep.itemAt(i);
+            var to = i < nc.length ? nc[i] : "";
+            if (cell) {
+                cell.schedule(to, i * resetStep, valueStart + i * valueStep);
+            }
+        }
+        chars = nc;
+    }
+
+    Repeater {
+        id: rep
+        model: root.chars.length
+
+        delegate: Rectangle {
+            id: cell
+
+            width: root.cellWidth
+            height: root.height
+            radius: 2
+            color: "#0b0b0d"
+            border.color: "#26262b"
+            border.width: 1
+
+            // plain properties (not bindings) so the animations control
+            // when the character actually changes
+            property string ch: ""
+            property string targetCh: ""
+            property string animCh: ""
+
+            Component.onCompleted: {
+                ch = root.chars[index] !== undefined ? root.chars[index] : "";
+            }
+
+            // schedule the two-phase cycle: reset to "0", then target
+            function schedule(t, resetDelay, valueDelay) {
+                targetCh = t;
+                resetTimer.interval = Math.max(0, resetDelay);
+                resetTimer.restart();
+                valueTimer.interval = Math.max(0, valueDelay);
+                valueTimer.restart();
+            }
+
+            function startFlip(newCh) {
+                if (newCh === ch) {
+                    return;
+                }
+                animCh = newCh;
+                flipAnim.restart();
+            }
+
+            Timer {
+                id: resetTimer
+                interval: 0
+                onTriggered: cell.startFlip("0")
+            }
+
+            Timer {
+                id: valueTimer
+                interval: 0
+                onTriggered: cell.startFlip(cell.targetCh)
+            }
+
+            transform: Scale {
+                id: scaleTransform
+                origin.y: cell.height / 2
+                yScale: 1
+            }
+
+            SequentialAnimation {
+                id: flipAnim
+                NumberAnimation {
+                    target: scaleTransform
+                    property: "yScale"
+                    to: 0.06
+                    duration: 130
+                    easing.type: Easing.InQuad
+                }
+                ScriptAction {
+                    script: cell.ch = cell.animCh
+                }
+                NumberAnimation {
+                    target: scaleTransform
+                    property: "yScale"
+                    to: 1
+                    duration: 130
+                    easing.type: Easing.OutQuad
+                }
+            }
+
+            Text {
+                anchors.centerIn: parent
+                text: cell.ch
+                color: "#f2f2f2"
+                font.family: "DejaVu Sans Mono"
+                font.pixelSize: root.cellFont
+            }
+
+            // the flap split line across the middle
+            Rectangle {
+                anchors.horizontalCenter: parent.horizontalCenter
+                y: parent.height / 2 - 1
+                width: parent.width
+                height: 2
+                color: "#000000"
+                opacity: 0.55
+            }
+        }
+    }
+
+    // breathing room between the board and the currency sign
+    Item {
+        width: root.height * 0.22
+        height: 1
+    }
+
+    // euro sign in the plain-text font, white; bottom-aligned with the
+    // price digits (bottomMargin tuned so the glyph bottom matches)
+    Text {
+        anchors.bottom: parent.bottom
+        anchors.bottomMargin: root.height * 0.02
+        text: "\u20AC"
+        visible: root.digitsOnly.length > 0
+        color: "#ffffff"
+        font.family: Qt.application.font.family
+        font.pixelSize: root.height * 0.85
+    }
+
+    // same breathing room between the euro sign and the arrow
+    Item {
+        width: root.height * 0.22
+        height: 1
+    }
+
+    // trend arrow: green up / red down; unchanged keeps the last arrow.
+    // Bottom-aligned with the euro sign and the digits.
+    Text {
+        anchors.bottom: parent.bottom
+        anchors.bottomMargin: root.height * 0.16
+        text: root.lastDir > 0 ? "\u25B2" : "\u25BC"
+        visible: root.digitsOnly.length > 0 && root.lastDir !== 0
+        color: root.lastDir > 0 ? "#2ecc71" : "#e74c3c"
+        font.family: Qt.application.font.family
+        font.pixelSize: root.height * 0.9
+    }
+}

contents/ui/DisplayNixie.qml

@@ -0,0 +1,196 @@
+/*
+ * Nixie tube display mode — retro amber glowing digits in glass tubes.
+ * Glow is faked with layered text copies, so no QtGraphicalEffects
+ * dependency. Tubes flicker randomly (nixie cathode style); the
+ * flicker intensity is configurable (0 = off, 100 = nervous).
+ * The euro sign is plain text (default font, white), followed by a
+ * trend arrow (green up / red down; unchanged keeps the last arrow).
+ * Pure QtQuick: testable outside the plasmoid shell.
+ */
+
+import QtQuick 2.15
+
+Row {
+    id: root
+
+    // wired by the parent loader
+    property string display: "--"
+    // 1 = up, -1 = down, 0 = unchanged -> keep showing the last arrow
+    property int trendDir: 0
+    property int lastDir: 0
+    onTrendDirChanged: {
+        if (trendDir !== 0) {
+            lastDir = trendDir;
+        }
+    }
+    // 0 = no flicker, 100 = frequent and deep flicker
+    property int flickerIntensity: 40
+
+    spacing: height * 0.05
+
+    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
+
+        delegate: Rectangle {
+            id: tube
+
+            width: root.tubeWidth
+            height: root.height
+            radius: width * 0.30
+            gradient: Gradient {
+                GradientStop { position: 0.0; color: "#3a2410" }
+                GradientStop { position: 0.5; color: "#241505" }
+                GradientStop { position: 1.0; color: "#160c03" }
+            }
+            border.color: "#4a2e12"
+            border.width: 1
+
+            // glass reflection strip
+            Rectangle {
+                anchors.top: parent.top
+                anchors.topMargin: parent.height * 0.06
+                anchors.horizontalCenter: parent.horizontalCenter
+                width: parent.width * 0.5
+                height: parent.height * 0.16
+                radius: height / 2
+                color: "#ffffff"
+                opacity: 0.06
+            }
+
+            // digit + glow layers, flickered as one group
+            Item {
+                id: glowGroup
+                anchors.fill: parent
+
+                Text {
+                    id: glowText
+                    anchors.centerIn: parent
+                    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
+                    }
+                }
+            }
+
+            // nixie flicker: random dropout of the cathode glow.
+            // repeat: true keeps the cycle alive; each trigger reschedules
+            // the next interval (intensity 40 -> ~4 s between flicks,
+            // 100 -> ~1.5 s).
+            Timer {
+                id: flickTimer
+                repeat: true
+                running: root.flickerOn
+                interval: 1500
+                onTriggered: {
+                    flick.restart();
+                    scheduleNext();
+                }
+
+                function scheduleNext() {
+                    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);
+                    }
+                }
+                PauseAnimation { duration: 40 + Math.random() * 140 }
+                NumberAnimation {
+                    target: glowGroup
+                    property: "opacity"
+                    to: 1.0
+                    duration: 90 + Math.random() * 160
+                    easing.type: Easing.OutQuad
+                }
+            }
+        }
+    }
+
+    // breathing room between the tubes and the currency sign
+    Item {
+        width: root.height * 0.22
+        height: 1
+    }
+
+    // euro sign in the plain-text font, white; bottom-aligned with the
+    // price digits (bottomMargin tuned so the glyph bottom matches)
+    Text {
+        anchors.bottom: parent.bottom
+        anchors.bottomMargin: root.height * -0.015
+        text: "\u20AC"
+        visible: root.digits.length > 0
+        color: "#ffffff"
+        font.family: Qt.application.font.family
+        font.pixelSize: root.height * 0.85
+    }
+
+    // same breathing room between the euro sign and the arrow
+    Item {
+        width: root.height * 0.22
+        height: 1
+    }
+
+    // trend arrow: green up / red down; unchanged keeps the last arrow.
+    // Bottom-aligned with the euro sign and the digits.
+    Text {
+        anchors.bottom: parent.bottom
+        anchors.bottomMargin: root.height * 0.10
+        text: root.lastDir > 0 ? "\u25B2" : "\u25BC"
+        visible: root.digits.length > 0 && root.lastDir !== 0
+        color: root.lastDir > 0 ? "#2ecc71" : "#e74c3c"
+        font.family: Qt.application.font.family
+        font.pixelSize: root.height * 0.81
+    }
+
+    // error / empty state
+    Text {
+        anchors.verticalCenter: parent.verticalCenter
+        text: "--"
+        color: "#7a4e1c"
+        font.family: "DejaVu Serif"
+        font.pixelSize: root.glowFont * 0.8
+        visible: root.digits.length === 0
+    }
+}

contents/ui/DisplayText.qml

@@ -0,0 +1,27 @@
+/*
+ * Plain text display mode — colored price text.
+ * Pure QtQuick on purpose: no Plasma imports, so it can be loaded
+ * and tested outside the plasmoid shell.
+ */
+
+import QtQuick 2.15
+
+Text {
+    id: root
+
+    // wired by the parent loader: the formatted price string
+    property string display: "--"
+    // trend color (green/red/grey) from the widget root
+    property color trendColor: "#9e9e9e"
+
+    text: root.display
+    color: root.trendColor
+    textFormat: Text.PlainText
+    elide: Text.ElideRight
+    horizontalAlignment: Text.AlignHCenter
+    verticalAlignment: Text.AlignVCenter
+    font.family: Qt.application.font.family
+    font.pixelSize: root.height > 0
+                    ? Math.round(root.height * 0.82)
+                    : Qt.application.font.pixelSize
+}

contents/ui/configGeneral.qml

@@ -1,16 +1,65 @@
+/*
+ * 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
-import QtQuick.Controls 2.15
+import QtQuick.Controls 2.15 as QQC2
 import org.kde.kirigami 2.5 as Kirigami
 
 Kirigami.FormLayout {
-    property alias cfg_refreshMinutes: intervalSpin.value
+    id: generalPage
 
-    SpinBox {
+    // 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
+    }
+
+    QQC2.ComboBox {
+        id: modeCombo
+        Kirigami.FormData.label: i18n("Display style:")
+        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):")
         from: 5
         to: 1440
         stepSize: 5
         editable: true
-        Kirigami.FormData.label: i18n("Vernieuwinterval (minuten):")
+    }
+
+    QQC2.Label {
+        text: i18n("CoinGecko allows one request per 5 minutes; lower values are not possible.")
+        font.italic: true
+        opacity: 0.7
     }
 }

contents/ui/main.qml

@@ -1,14 +1,18 @@
 /*
  * nl.a14r.bitcoinprice — KDE Plasma 5 widget
  *
- * Toont de bitcoinprijs in EUR (CoinGecko API).
- *  - Groen : prijs gestegen t.o.v. vorige meting
- *  - Rood  : prijs gedaald t.o.v. vorige meting
- *  - Grijs : gelijk gebleven (of eerste meting)
- *  - "--"  : API-fout (netwerkfout, 4xx/5xx, rate limit 429)
+ * Shows the bitcoin price in EUR (CoinGecko API).
+ *  - Green : price up compared to the previous reading
+ *  - Red   : price down compared to the previous reading
+ *  - Grey  : unchanged (or first reading)
+ *  - "--"  : API failure (network error, 4xx/5xx, 429 rate limit)
  *
- * Vernieuwinterval: configureerbaar, minimaal 5 minuten
- * (CoinGecko limiet: 1 call per 5 minuten).
+ * Display modes: 0 = plain text (trend-colored), 1 = split-flap board,
+ * 2 = nixie tubes. In the flip and nixie modes the trend shows on a
+ * small LED, the digits themselves stay white / amber.
+ *
+ * Refresh interval: configurable, minimum 5 minutes
+ * (CoinGecko limit: 1 call per 5 minutes).
  */
 
 import QtQuick 2.15
@@ -20,44 +24,84 @@ Item {
     id: root
 
     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 = gedaald, 0 = gelijk / nog geen vorige meting, 1 = gestegen
+    // -1 = down, 0 = unchanged / no previous reading yet, 1 = up
     property int trend: 0
-    property double lastPrice: NaN   // laatste succesvol opgehaalde prijs
+    property double lastPrice: NaN   // last successfully fetched price
     property string state: "init"    // init | ok | error
-    property string lastUpdated: ""  // HH:mm:ss van laatste succesvolle update
+    property string lastUpdated: ""  // HH:mm:ss of the last successful update
 
     readonly property string displayText: {
         if (state !== "ok" || isNaN(lastPrice)) {
             return "--";
         }
-        return "\u20BF " + Number(lastPrice).toLocaleString(Qt.locale(), "f", 0) + " \u20AC";
+        return Number(lastPrice).toLocaleString(Qt.locale(), "f", 0) + " \u20AC";
     }
 
     readonly property color priceColor: {
         if (state !== "ok" || isNaN(lastPrice)) {
-            return PlasmaCore.Theme.disabledTextColor; // "--" bij fout/init
+            return PlasmaCore.Theme.disabledTextColor; // "--" on error/init
         }
         if (trend > 0) {
-            return "#2ecc71";                          // groen
+            return "#2ecc71";                          // green
         }
         if (trend < 0) {
-            return "#e74c3c";                          // rood
+            return "#e74c3c";                          // red
         }
-        return "#9e9e9e";                              // grijs
+        return "#9e9e9e";                              // grey
     }
 
     readonly property string statusText: {
         if (state === "error") {
             return lastUpdated === ""
-                    ? i18n("API-fout")
-                    : i18n("API-fout — laatste geldige prijs: %1", lastUpdated);
+                    ? i18n("API error")
+                    : i18n("API error — last known price: %1", lastUpdated);
         }
         if (lastUpdated === "") {
-            return i18n("Bezig met ophalen\u2026");
+            return i18n("Fetching\u2026");
         }
-        return i18n("Laatst bijgewerkt: %1", lastUpdated);
+        return i18n("Last updated: %1", lastUpdated);
+    }
+
+    Component.onCompleted: {
+        try {
+            // 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
+        }
+        console.log("[bitcoinprice] started, refresh interval:", refreshMinutes,
+                    "minutes, display mode:", displayMode);
     }
 
     Plasmoid.backgroundHints: PlasmaCore.Types.StandardBackground
@@ -70,22 +114,48 @@ Item {
         Item {
             id: compact
 
-            Layout.minimumWidth: priceLabel.implicitWidth + PlasmaCore.Units.smallSpacing * 2
+            Layout.minimumWidth: btcIcon.width + row.spacing
+                                 + (displayLoader.item ? displayLoader.item.implicitWidth : 0)
+                                 + PlasmaCore.Units.smallSpacing * 2
             Layout.minimumHeight: PlasmaCore.Units.iconSizes.smallMedium
 
-            Text {
-                id: priceLabel
+            Row {
+                id: row
                 anchors.centerIn: parent
-                text: root.displayText
-                color: root.priceColor
-                textFormat: Text.PlainText
-                elide: Text.ElideRight
-                horizontalAlignment: Text.AlignHCenter
-                verticalAlignment: Text.AlignVCenter
-                font.family: PlasmaCore.Theme.defaultFont.family
-                font.pixelSize: compact.height > PlasmaCore.Units.iconSizes.small
-                                ? Math.round(compact.height * 0.6)
-                                : PlasmaCore.Theme.defaultFont.pixelSize
+                spacing: PlasmaCore.Units.smallSpacing
+
+                Image {
+                    id: btcIcon
+                    source: "../images/bitcoin.svg"
+                    sourceSize.width: Math.round(PlasmaCore.Units.iconSizes.smallMedium * 1.1)
+                    sourceSize.height: Math.round(PlasmaCore.Units.iconSizes.smallMedium * 1.1)
+                    anchors.verticalCenter: parent.verticalCenter
+                    fillMode: Image.PreserveAspectFit
+                    visible: root.state === "ok"
+                }
+
+                Loader {
+                    id: displayLoader
+                    anchors.verticalCenter: parent.verticalCenter
+                    height: compact.height * 0.62
+                    width: item ? item.implicitWidth : 0
+                    source: root.modeSource
+                    onLoaded: {
+                        item.display = Qt.binding(function () { return root.displayText; });
+                        if (item.trendColor !== undefined) {
+                            item.trendColor = Qt.binding(function () { return root.priceColor; });
+                        }
+                        if (item.trendDir !== undefined) {
+                            item.trendDir = Qt.binding(function () { return root.trend; });
+                        }
+                        if (item.flapSeconds !== undefined) {
+                            item.flapSeconds = Qt.binding(function () { return root.flapSeconds; });
+                        }
+                        if (item.flickerIntensity !== undefined) {
+                            item.flickerIntensity = Qt.binding(function () { return root.nixieFlicker; });
+                        }
+                    }
+                }
             }
         }
     }
@@ -94,19 +164,43 @@ Item {
         Item {
             id: fullRep
 
-            implicitWidth: PlasmaCore.Units.gridUnit * 14
-            implicitHeight: PlasmaCore.Units.gridUnit * 7
+            implicitWidth: PlasmaCore.Units.gridUnit * 16
+            implicitHeight: PlasmaCore.Units.gridUnit * 10
 
             Column {
                 anchors.centerIn: parent
                 spacing: PlasmaCore.Units.smallSpacing
 
-                Text {
+                Image {
                     anchors.horizontalCenter: parent.horizontalCenter
-                    text: root.displayText
-                    color: root.priceColor
-                    font.family: PlasmaCore.Theme.defaultFont.family
-                    font.pixelSize: PlasmaCore.Units.gridUnit * 2
+                    source: "../images/bitcoin.svg"
+                    sourceSize.width: Math.round(PlasmaCore.Units.iconSizes.large * 1.1)
+                    sourceSize.height: Math.round(PlasmaCore.Units.iconSizes.large * 1.1)
+                    fillMode: Image.PreserveAspectFit
+                    visible: root.state === "ok"
+                }
+
+                Loader {
+                    id: fullDisplayLoader
+                    anchors.horizontalCenter: parent.horizontalCenter
+                    height: PlasmaCore.Units.gridUnit * 2.4
+                    width: item ? item.implicitWidth : 0
+                    source: root.modeSource
+                    onLoaded: {
+                        item.display = Qt.binding(function () { return root.displayText; });
+                        if (item.trendColor !== undefined) {
+                            item.trendColor = Qt.binding(function () { return root.priceColor; });
+                        }
+                        if (item.trendDir !== undefined) {
+                            item.trendDir = Qt.binding(function () { return root.trend; });
+                        }
+                        if (item.flapSeconds !== undefined) {
+                            item.flapSeconds = Qt.binding(function () { return root.flapSeconds; });
+                        }
+                        if (item.flickerIntensity !== undefined) {
+                            item.flickerIntensity = Qt.binding(function () { return root.nixieFlicker; });
+                        }
+                    }
                 }
 
                 Text {
@@ -141,14 +235,15 @@ Item {
                 try {
                     var price = JSON.parse(xhr.responseText).bitcoin.eur;
                     if (typeof price === "number" && !isNaN(price)) {
+                        console.log("[bitcoinprice] fetched EUR", price);
                         root.applyPrice(price);
                         return;
                     }
                 } catch (e) {
-                    // ongeldige JSON → val door naar de foutafhandeling
+                    // invalid JSON → fall through to error handling
                 }
             }
-            // API-fout (netwerk, 4xx/5xx, rate limit 429, onverwachte payload)
+            console.log("[bitcoinprice] fetch failed, HTTP status:", xhr.status);
             root.state = "error";
         };
         xhr.send();

metadata.desktop

@@ -1,8 +1,6 @@
 [Desktop Entry]
 Name=Bitcoin Price
-Name[nl]=Bitcoin-prijs
 Comment=Shows the bitcoin price in EUR, color-coded by trend
-Comment[nl]=Toont de bitcoinprijs in EUR, kleurcodering op trend
 Type=Service
 Icon=bitcoin
 
@@ -12,8 +10,8 @@ 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=1.0.0
-X-KDE-PluginInfo-Website=http://192.168.110.5:40004/hermes/plasma-bitcoin-price
+X-KDE-PluginInfo-Version=1.6.0
+X-KDE-PluginInfo-Website=https://gitea.a14r.be/hermes/plasma-bitcoin-price
 X-KDE-PluginInfo-Category=Utilities
 X-KDE-PluginInfo-License=MIT
 X-KDE-PluginInfo-EnabledByDefault=true