Initial commit

Lts/Viewer/SituationMap/MapImpl/screen_location_elevation_helper_base.h

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+/**
+  * @RDE_HEADER@
+  * Base class for ScreenToLocation and LocationToElevation
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#pragma once
+
+// Own
+#include <situation_map_export.h>
+#include <Common/situation_map_logging.h>
+
+
+// ESRI
+
+
+// Qt
+#include <QUuid>
+#include <QTimer>
+
+
+namespace Esri {
+namespace ArcGISRuntime
+{
+class TaskWatcher;
+}
+}
+
+
+//----------------------------------------------------------------------------
+namespace SituationMap
+{
+/**
+ * @brief The ScreenLocationElevationHelperBase class limits the load of
+ * e.g. Esri::ArcGISRuntime::SceneGraphicsView::screenToLocation
+ * (cpu load of ~50% was recognized othjerwise)
+ * This class limits this to 10 computations per second.
+ */
+class SITUATIONMAP_EXPORT ScreenLocationElevationHelperBase : public QObject
+{
+  Q_OBJECT
+
+  using BaseClass = QObject;
+
+public:
+  /*! \name Construction, Destruction */
+  //@{
+  explicit ScreenLocationElevationHelperBase(QObject *parent = nullptr);
+  virtual ~ScreenLocationElevationHelperBase();
+
+  int pendingOperationsCount() const;
+  void cancel();
+  void stop();
+
+  void newComputationRequested();
+
+  ScreenLocationElevationHelperBase(const ScreenLocationElevationHelperBase &other)      = delete;
+  ScreenLocationElevationHelperBase &operator=(ScreenLocationElevationHelperBase &other) = delete;
+  //@}
+
+  virtual void mainComputation() = 0;
+
+private Q_SLOTS:
+  void onMainTimoutInternal();
+  void onKillTimout();
+
+protected:
+  bool insertTask(const Esri::ArcGISRuntime::TaskWatcher &tw);
+  bool removeTask(const QUuid &taskId);
+
+private:
+  LOGGER_T m_logger;      ///< Interface of the Logging-Facility
+
+  class Private;
+  /**
+      * The private d->pointer to not break BC when changing internals of this class
+     */
+  Private *d = nullptr;
+};
+
+} // namespace SituationMap
+