Display momentary current value

application/qml/pages/MainPage.qml

@@ -153,6 +153,11 @@ Page {
                         label: qsTr("Charge:")
                         value: battery.charge + "%"
                     }
+                    MyDetailItem {
+                        label: qsTr("Current:")
+                        value: Math.floor(battery.current / 1000) + " mA"
+                    }
+
                     MyDetailItem {
                         label: qsTr("Charger connected:")
                         value: battery.chargerConnected ? qsTr("yes") : qsTr("no")

application/src/battery.cpp

@@ -26,6 +26,10 @@ Battery::Battery(Settings* newSettings, QObject* parent) : QObject(parent)
     chargeFile   = new QFile("/sys/class/power_supply/battery/capacity", this);
     qInfo() << "Reading capacity from" << chargeFile->fileName();
 
+    // Number: battery/charging current, e.g. -1450000 (-145mA)
+    currentFile   = new QFile("/sys/class/power_supply/battery/current_now", this);
+    qInfo() << "Reading current from" << currentFile->fileName();
+
     // String: charging, discharging, full, empty, unknown (others?)
     stateFile   = new QFile("/sys/class/power_supply/battery/status", this);
     qInfo() << "Reading charge state from" << stateFile->fileName();
@@ -105,6 +109,15 @@ void Battery::updateData()
         }
         chargeFile->close();
     }
+    if(currentFile && currentFile->open(QIODevice::ReadOnly)) {
+        nextCurrent = currentFile->readLine().trimmed().toInt();
+        if(nextCurrent != current) {
+            current = nextCurrent;
+            emit currentChanged(current);
+            qDebug() << "Current:" << current;
+        }
+        currentFile->close();
+    }
     if(chargerConnectedFile && chargerConnectedFile->open(QIODevice::ReadOnly)) {
         nextChargerConnected = chargerConnectedFile->readLine().trimmed().toInt();
         if(nextChargerConnected != chargerConnected) {
@@ -127,6 +140,8 @@ void Battery::updateData()
 
 int Battery::getCharge(){ return charge; }
 
+int Battery::getCurrent(){ return current; }
+
 QString Battery::getState() { return state; }
 
 bool Battery::getChargingEnabled() { return chargingEnabled; }

application/src/battery.h

@@ -31,6 +31,7 @@ class Battery : public QObject
 {
     Q_OBJECT
     Q_PROPERTY(int charge READ getCharge NOTIFY chargeChanged)
+    Q_PROPERTY(int current READ getCurrent NOTIFY currentChanged)
     Q_PROPERTY(bool chargerConnected READ getChargerConnected NOTIFY chargerConnectedChanged)
     Q_PROPERTY(QString state READ getState NOTIFY stateChanged)
     Q_PROPERTY(bool chargingEnabled READ getChargingEnabled  WRITE setChargingEnabled NOTIFY chargingEnabledChanged)
@@ -40,6 +41,7 @@ public:
     ~Battery();
 
     int getCharge();
+    int getCurrent();
     bool getCharging();
     bool getChargerConnected();
     QString getState();
@@ -52,6 +54,7 @@ public slots:
 
 private:
     QFile* chargeFile = nullptr;
+    QFile* currentFile = nullptr;
     QFile* chargerConnectedFile = nullptr;
     QFile* stateFile = nullptr;
     QFile* chargingEnabledFile = nullptr;
@@ -59,6 +62,7 @@ private:
 
     // Default values:
     int charge = 100; // 100% full
+    int current = 0; // Not charging/discharging
     bool chargerConnected = false; // Charger plugged in
     QString state = "idle"; // dis/charging, idle, unknown
     bool chargingEnabled = true; // Only ever disabled manually
@@ -68,12 +72,14 @@ private:
     bool chargerIsEnabled = true;
 
     int nextCharge = charge;
+    int nextCurrent = current;
     bool nextChargerConnected = chargerConnected;
     QString nextState = state;
     bool nextChargingEnabled = chargingEnabled;
 
 signals:
     void chargeChanged(int);
+    void currentChanged(int);
     void stateChanged(QString);
     void chargingEnabledChanged(bool);
     void chargerConnectedChanged(bool);

application/translations/harbour-batterybuddy.ts

@@ -235,6 +235,10 @@
         <source>Stop</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Current:</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>Settings</name>