nova-shell/shell/applets/TemperatureApplet.qml

import QtQuick
import "../services" as S

Column {
    id: root

    required property int temp
    required property int warm
    required property int hot
    required property var history
    required property var devices
    required property color accentColor

    property bool active: true
    property string deviceFilter: ""

    property color stateColor: temp > hot ? S.Theme.base08 : temp > warm ? S.Theme.base0A : root.accentColor
    Behavior on stateColor {
        ColorAnimation {
            duration: 300
        }
    }

    function _tempColor(celsius) {
        const t = Math.max(0, Math.min(100, celsius)) / 100;
        const a = t < 0.5 ? S.Theme.base0B : S.Theme.base0A;
        const b = t < 0.5 ? S.Theme.base0A : S.Theme.base08;
        const u = t < 0.5 ? t * 2 : (t - 0.5) * 2;
        return Qt.rgba(a.r + (b.r - a.r) * u, a.g + (b.g - a.g) * u, a.b + (b.b - a.b) * u, 1);
    }

    // Header - current temp
    Item {
        width: root.width
        height: 28

        Text {
            anchors.right: parent.right
            anchors.rightMargin: 12
            anchors.verticalCenter: parent.verticalCenter
            text: root.temp + "\u00B0C"
            color: root.stateColor
            font.pixelSize: S.Theme.fontSize
            font.family: S.Theme.fontFamily
            font.bold: true
            width: _tempSizer.implicitWidth
            horizontalAlignment: Text.AlignRight

            Text {
                id: _tempSizer
                visible: false
                text: "100\u00B0C"
                font: parent.font
            }
        }
    }

    // Gauge bar (0-100C), with warm/hot threshold markers
    Item {
        width: root.width
        height: 16

        Item {
            id: _gaugeBar
            anchors.left: parent.left
            anchors.leftMargin: 12
            anchors.right: parent.right
            anchors.rightMargin: 12
            anchors.verticalCenter: parent.verticalCenter
            height: 6

            Rectangle {
                anchors.fill: parent
                color: S.Theme.base02
                radius: 3
            }

            Rectangle {
                width: parent.width * Math.min(1, root.temp / 100)
                height: parent.height
                color: root.stateColor
                radius: 3
                Behavior on width {
                    enabled: root.active
                    NumberAnimation {
                        duration: 300
                        easing.type: Easing.OutCubic
                    }
                }
            }

            // Warm threshold marker
            Rectangle {
                x: parent.width * (root.warm / 100) - 1
                width: 1
                height: parent.height + 4
                anchors.verticalCenter: parent.verticalCenter
                color: S.Theme.base0A
                opacity: 0.6
            }

            // Hot threshold marker
            Rectangle {
                x: parent.width * (root.hot / 100) - 1
                width: 1
                height: parent.height + 4
                anchors.verticalCenter: parent.verticalCenter
                color: S.Theme.base08
                opacity: 0.6
            }
        }
    }

    // History sparkline
    Canvas {
        id: _sparkline
        anchors.left: parent.left
        anchors.leftMargin: 12
        anchors.right: parent.right
        anchors.rightMargin: 12
        height: 40

        property var _hist: root.history
        property color _col: root.stateColor

        on_HistChanged: if (root.active)
            requestPaint()
        on_ColChanged: if (root.active)
            requestPaint()

        onVisibleChanged: if (visible)
            requestPaint()

        onPaint: {
            const ctx = getContext("2d");
            if (!ctx)
                return;
            ctx.clearRect(0, 0, width, height);
            const d = _hist;
            if (!d.length)
                return;

            const maxSamples = 150;
            const bw = width / maxSamples;

            // Background tint
            ctx.fillStyle = Qt.rgba(_col.r, _col.g, _col.b, 0.08).toString();
            ctx.fillRect(0, 0, width, height);

            // Warm threshold line
            const warmY = height - height * (root.warm / 100);
            ctx.strokeStyle = S.Theme.base0A.toString();
            ctx.globalAlpha = 0.3;
            ctx.lineWidth = 1;
            ctx.setLineDash([3, 3]);
            ctx.beginPath();
            ctx.moveTo(0, warmY);
            ctx.lineTo(width, warmY);
            ctx.stroke();

            // Hot threshold line
            const hotY = height - height * (root.hot / 100);
            ctx.strokeStyle = S.Theme.base08.toString();
            ctx.beginPath();
            ctx.moveTo(0, hotY);
            ctx.lineTo(width, hotY);
            ctx.stroke();

            ctx.setLineDash([]);
            ctx.globalAlpha = 1.0;

            // Bars
            const offset = maxSamples - d.length;
            for (let i = 0; i < d.length; i++) {
                const barH = Math.max(1, height * d[i] / 100);
                const barColor = d[i] > root.hot ? S.Theme.base08 : d[i] > root.warm ? S.Theme.base0A : _col;
                ctx.fillStyle = barColor.toString();
                ctx.fillRect((offset + i) * bw, height - barH, Math.max(1, bw - 0.5), barH);
            }
        }
    }

    // Threshold labels
    Item {
        width: root.width
        height: 16

        Text {
            anchors.left: parent.left
            anchors.leftMargin: 12
            anchors.verticalCenter: parent.verticalCenter
            text: "warm " + root.warm + "\u00B0  hot " + root.hot + "\u00B0"
            color: S.Theme.base03
            font.pixelSize: S.Theme.fontSize - 3
            font.family: S.Theme.fontFamily
            font.letterSpacing: 0.5
        }

        Text {
            anchors.right: parent.right
            anchors.rightMargin: 12
            anchors.verticalCenter: parent.verticalCenter
            text: "10 min"
            color: S.Theme.base03
            font.pixelSize: S.Theme.fontSize - 3
            font.family: S.Theme.fontFamily
        }
    }

    // Per-device breakdown
    Rectangle {
        width: root.width - 16
        height: 1
        anchors.horizontalCenter: parent.horizontalCenter
        color: S.Theme.base03
        visible: root.devices.length > 0
    }

    Repeater {
        model: root.devices
        delegate: Item {
            required property var modelData
            width: root.width
            height: 22

            readonly property bool _isActive: root.deviceFilter === modelData.name

            Rectangle {
                anchors.fill: parent
                anchors.leftMargin: 8
                anchors.rightMargin: 8
                color: _isActive ? Qt.rgba(root.accentColor.r, root.accentColor.g, root.accentColor.b, 0.12) : "transparent"
                radius: 3
            }

            Text {
                anchors.left: parent.left
                anchors.leftMargin: 12
                anchors.verticalCenter: parent.verticalCenter
                text: modelData.name
                color: _isActive ? root.accentColor : S.Theme.base04
                font.pixelSize: S.Theme.fontSize - 2
                font.family: S.Theme.fontFamily
                elide: Text.ElideRight
                width: parent.width - 80
            }

            Text {
                anchors.right: parent.right
                anchors.rightMargin: 12
                anchors.verticalCenter: parent.verticalCenter
                text: modelData.celsius + "\u00B0C"
                color: root._tempColor(modelData.celsius)
                font.pixelSize: S.Theme.fontSize - 2
                font.family: S.Theme.fontFamily
                font.bold: _isActive
            }
        }
    }

    Item {
        width: 1
        height: 4
    }
}