added lightning bolt

SystemInfo.cpp

@@ -2,6 +2,7 @@
 
 #include <QDir>
 #include <QFile>
+#include <QFileInfo>
 #include <QTextStream>
 
 SystemInfo::SystemInfo(QObject *parent)
@@ -16,7 +17,8 @@ SystemInfo::SystemInfo(QObject *parent)
             this,
             &SystemInfo::updateBattery);
 
-    // Battery percentage doesn't need millisecond precision.
+    // Battery percentage and charging state don't need
+    // millisecond precision.
     m_batteryTimer.start(10000);
 }
 
@@ -25,6 +27,11 @@ int SystemInfo::batteryPercent() const
     return m_batteryPercent;
 }
 
+bool SystemInfo::charging() const
+{
+    return m_charging;
+}
+
 QString SystemInfo::findBatteryCapacityPath() const
 {
     QDir powerSupply("/sys/class/power_supply");
@@ -64,26 +71,52 @@ void SystemInfo::updateBattery()
     if (m_capacityPath.isEmpty())
         return;
 
+    // ─────────────────────────────────────────────────────────────
+    // Battery percentage
+    // ─────────────────────────────────────────────────────────────
+
     QFile capacityFile(m_capacityPath);
 
-    if (!capacityFile.open(QIODevice::ReadOnly | QIODevice::Text))
-        return;
+    if (capacityFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        bool ok = false;
 
-    bool ok = false;
+        int percent =
+            QString::fromUtf8(capacityFile.readAll())
+                .trimmed()
+                .toInt(&ok);
 
-    int percent =
-        QString::fromUtf8(capacityFile.readAll())
-            .trimmed()
-            .toInt(&ok);
+        if (ok) {
+            percent = qBound(0, percent, 100);
 
-    if (!ok)
-        return;
+            if (percent != m_batteryPercent) {
+                m_batteryPercent = percent;
+                emit batteryPercentChanged();
+            }
+        }
+    }
 
-    percent = qBound(0, percent, 100);
+    // ─────────────────────────────────────────────────────────────
+    // Charging state
+    // ─────────────────────────────────────────────────────────────
 
-    if (percent == m_batteryPercent)
-        return;
+    // m_capacityPath is something like:
+    // /sys/class/power_supply/battery/capacity
+    //
+    // The status file lives beside it.
+    const QString batteryDirectory =
+        QFileInfo(m_capacityPath).absolutePath();
 
-    m_batteryPercent = percent;
-    emit batteryPercentChanged();
-}
+    QFile statusFile(batteryDirectory + "/status");
+
+    if (statusFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        const QString status =
+            QString::fromUtf8(statusFile.readAll()).trimmed();
+
+        const bool charging = (status == "Charging");
+
+        if (charging != m_charging) {
+            m_charging = charging;
+            emit chargingChanged();
+        }
+    }
+}