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project/fm_viewer/ui/rm_map_thread.h

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+#ifndef RM_MAP_THREAD_H
+#define RM_MAP_THREAD_H
+#include "../rm_include.h"
+
+#if (TEST_MAP_MOVE_THREAD)
+#include <QThreadPool>
+#include <QObject>
+#include <QQueue>
+class RMMapMove : public QObject
+{
+    Q_OBJECT
+public:
+    double _lon;
+    double _lat;
+    double _speed;
+    bool _drawLine;
+    RMMapMove(double lon, double lat, double speed, bool drawLine) : QObject()
+    {
+        _lon = lon;
+        _lat = lat;
+        _speed = speed;
+        _drawLine = drawLine;
+    }
+};
+
+class RMMapUpdater : public QThread
+{
+    Q_OBJECT
+public:
+    QQueue<RMMapMove*> queue;
+    void runMove(RMMapMove *move)
+    {
+        _mutex.lock();
+        queue.enqueue(move);
+        //printf("queue count:%d",queue.count());
+        //qInfo() << "queue.count:" << queue.count();
+        _mutex.unlock();
+        startQueue();
+    }
+    void finish()
+    {
+        wait();
+    }
+protected:
+
+    virtual void startQueue()
+    {
+        if (!isRunning())
+            start(LowPriority); // calls run() in a new thread
+    }
+    virtual void run()
+    {
+        _mutex.lock();
+        while (!queue.empty())
+        {
+            _mutex.unlock();
+            RMMapMove* move = queue.dequeue();
+            double lon = move->_lon;
+            double lat = move->_lat;
+            double speed = move->_speed;
+            bool drawLine = move->_drawLine;
+            delete move;
+            _mutex.lock();
+
+            emit moveTo(lon,lat,speed,drawLine);
+        }
+        _mutex.unlock();
+    }
+
+private:
+    QMutex _mutex;
+signals:
+    void moveTo(double lon, double lat, double speed, bool drawLine);
+};
+#endif // TEST_MAP_MOVE_THREAD
+#endif // RM_MAP_THREAD_H