Qt improvments. Created a custom battery icon tray

2026-08-12 02:28:37 +02:00 · 2026-04-11 12:26:19 +02:00
parent 5812d50256
commit e8fa9451e9
12 changed files with 222 additions and 388 deletions
@@ -0,0 +1,176 @@
+# because cbatticon, batticonplus  and other things didn't work.
+# chatGpt did this.
+# https://chatgpt.com/c/69da11b3-ba24-8331-b7b0-a58a72e69d42
+# at your risk and perils
+# click on the icon to get a notification with state, percentage and wattage
+{ lib
+, stdenv
+, qt6
+, pkg-config
+, pkgs
+}:
+
+stdenv.mkDerivation {
+  pname = "qtbatticon";
+  version = "1.0";
+
+  src = pkgs.writeTextFile {
+    name = "qtbatticon.cpp";
+    text = ''
+#include <QApplication>
+#include <QSystemTrayIcon>
+#include <QTimer>
+#include <QFile>
+#include <QTextStream>
+#include <QIcon>
+#include <QString>
+#include <QDebug>
+#include <cstdlib>
+
+QString readFile(const QString &path) {
+    QFile f(path);
+    if (!f.open(QIODevice::ReadOnly)) return "";
+    QTextStream in(&f);
+    return in.readAll().trimmed();
+}
+
+int readInt(const QString &path) {
+    return readFile(path).toInt();
+}
+
+double readDouble(const QString &path) {
+    QFile f(path);
+    if (!f.open(QIODevice::ReadOnly)) return 0;
+    QTextStream in(&f);
+    return in.readAll().trimmed().toDouble();
+}
+
+int toStep(int capacity) {
+    return (capacity / 10) * 10;
+}
+
+QString pad3(int n) {
+    return QString("%1").arg(n, 3, 10, QChar('0'));
+}
+
+double getPowerW(const QString &batPath) {
+    double current_uA = readDouble(batPath + "/current_now");
+    double voltage_uV = readDouble(batPath + "/voltage_now");
+
+    if (current_uA > 0 && voltage_uV > 0) {
+        return (current_uA * voltage_uV) / 1e12;
+    }
+    return -1;
+}
+
+QIcon batteryIcon(int capacity, bool charging) {
+    int step = toStep(capacity);
+    QString num = pad3(step);
+
+    QString base = "/run/current-system/sw/share/icons/Papirus/24x24/panel/";
+
+    QString file;
+    if (charging) {
+        file = base + "battery-" + num + "-charging.svg";
+    } else {
+        file = base + "battery-" + num + ".svg";
+    }
+
+    QIcon icon(file);
+
+    if (icon.isNull()) {
+        qDebug() << "FAILED icon:" << file;
+        icon = QIcon(base + "battery-100.svg");
+    }
+
+    return icon;
+}
+
+void sendNotification(const QString &title, const QString &body) {
+    QString cmd = "notify-send \"" + title + "\" \"" + body + "\"";
+    system(cmd.toUtf8().constData());
+}
+
+int main(int argc, char *argv[]) {
+    QApplication app(argc, argv);
+
+    QString batPath = "/sys/class/power_supply/BAT1";
+    QSystemTrayIcon tray;
+
+    auto updateIcon = [&]() {
+        int capacity = readInt(batPath + "/capacity");
+        QString status = readFile(batPath + "/status");
+        bool charging = status.contains("Charging");
+
+        tray.setIcon(batteryIcon(capacity, charging));
+    };
+
+    auto notify = [&]() {
+        int capacity = readInt(batPath + "/capacity");
+        QString status = readFile(batPath + "/status");
+
+        bool charging = status.contains("Charging");
+        bool discharging = status.contains("Discharging");
+
+        double power = getPowerW(batPath);
+
+        QString state;
+        if (charging) state = "Charging";
+        else if (discharging) state = "Discharging";
+        else state = status;
+
+        QString powerStr = (power > 0.01)
+            ? QString::number(power, 'f', 2) + " W"
+            : "N/A";
+
+        QString msg =
+            QString("%1\n%2%\n%3")
+                .arg(state)
+                .arg(capacity)
+                .arg(powerStr);
+
+        sendNotification("Battery status", msg);
+    };
+
+    QObject::connect(&tray, &QSystemTrayIcon::activated,
+                     [&](QSystemTrayIcon::ActivationReason r) {
+        if (r == QSystemTrayIcon::Trigger) {
+            notify();
+        }
+    });
+
+    updateIcon();
+    tray.setVisible(true);
+
+    QTimer timer;
+    QObject::connect(&timer, &QTimer::timeout, updateIcon);
+    timer.start(5000);
+
+    return app.exec();
+}
+    '';
+  };
+
+  nativeBuildInputs = [
+    pkg-config
+    qt6.wrapQtAppsHook
+  ];
+
+  buildInputs = [
+    qt6.qtbase
+    qt6.qtsvg
+    pkgs.papirus-icon-theme
+  ];
+
+  dontUnpack = true;
+
+  buildPhase = ''
+    g++ $src -o qtbatticon \
+      $(pkg-config --cflags --libs Qt6Widgets)
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    install -m755 qtbatticon $out/bin/
+  '';
+}