example 'meshtastic': send phone GPS position to radio; revisions

examples/meshtastic/cpp/ble.cpp

@@ -31,7 +31,9 @@ void BLE::startDeviceDiscovery() {
 
 void BLE::addDevice(const QBluetoothDeviceInfo& device) {
   if (deviceFilter(device)) {
-    qDebug() << "device added:" << device.name();
+    QString name(device.name());
+    qDebug() << "device added:" << name;
+    Q_EMIT deviceDiscovered(name);
   }
 }
 

examples/meshtastic/cpp/ble.h

@@ -33,6 +33,7 @@ public:
 
 Q_SIGNALS:
   // notify
+  void deviceDiscovered(const QString&);
   void mainServiceReady();
   void deviceDisconnecting();
 

examples/meshtastic/cpp/qt.cpp

@@ -1,9 +1,15 @@
 #include "qt.h"
 #include "ble_meshtastic.h"
+#include <ecl_fun.h>
 #include <QSqlQuery>
 #include <QSqlError>
 #include <QtDebug>
 
+#ifdef Q_OS_ANDROID
+  #include <QtAndroid>
+  #include <QAndroidJniEnvironment>
+#endif
+
 QT_BEGIN_NAMESPACE
 
 QObject* ini() {
@@ -15,7 +21,12 @@ QObject* ini() {
 }
 
 QT::QT() : QObject() {
+  // BLE
   ble = new BLE_ME;
+  ble->connect(ble, &BLE::deviceDiscovered,
+               [](const QString& fullName) {
+                 ecl_fun("radios:device-discovered", fullName.right(4));
+               });
 }
 
 // BLE_ME
@@ -47,6 +58,48 @@ QVariant QT::write2(const QVariant& bytes) {
   return QVariant();
 }
 
+// GPS
+
+#ifdef Q_OS_ANDROID
+static void clearEventualExceptions() {
+  QAndroidJniEnvironment env;
+  if (env->ExceptionCheck()) {
+    env->ExceptionClear();
+  }
+}
+
+static qlonglong getLongField(const char* name) {
+  QAndroidJniObject activity = QtAndroid::androidActivity();
+  return static_cast<qlonglong>(activity.getField<jlong>(name));
+}
+
+static double getDoubleField(const char* name) {
+  QAndroidJniObject activity = QtAndroid::androidActivity();
+  return static_cast<double>(activity.getField<jdouble>(name));
+}
+#endif
+
+QVariant QT::iniPositioning() {
+#ifdef Q_OS_ANDROID
+  QtAndroid::runOnAndroidThread([] {
+    QAndroidJniObject activity = QtAndroid::androidActivity();
+    activity.callMethod<void>("iniLocation", "()V");
+    clearEventualExceptions();
+  });
+#endif
+  return QVariant();
+}
+
+QVariant QT::lastPosition() {
+  QVariantList pos;
+#ifdef Q_OS_ANDROID
+  pos << getDoubleField("_position_lat_")
+      << getDoubleField("_position_lon_")
+      << QString::number(getLongField("_position_time_")); // 'QString': see QML 'lastPosition()'
+#endif
+  return pos;
+}
+
 // SQLite
 
 QVariant QT::iniDb(const QVariant& name) {

examples/meshtastic/cpp/qt.h

@@ -25,6 +25,10 @@ public:
   Q_INVOKABLE QVariant read2();
   Q_INVOKABLE QVariant write2(const QVariant&);
 
+  // GPS
+  Q_INVOKABLE QVariant iniPositioning();
+  Q_INVOKABLE QVariant lastPosition();
+
   // SQLite
   Q_INVOKABLE QVariant iniDb(const QVariant&);
   Q_INVOKABLE QVariant sqlQuery(const QVariant&, const QVariant&);

examples/meshtastic/cpp/qt.pro

@@ -1,4 +1,4 @@
-QT          += bluetooth sql
+QT          += bluetooth sql positioning
 TEMPLATE    = lib
 CONFIG      += c++17 plugin release no_keywords
 DEFINES     += PLUGIN