custominputhandler.h Example File

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  #ifndef CUSTOMINPUTHANDLER_H
  #define CUSTOMINPUTHANDLER_H

  #include <QtDataVisualization/Q3DInputHandler>
  #include <QtDataVisualization/QAbstract3DGraph>
  #include <QtDataVisualization/QValue3DAxis>
  #include "highlightseries.h"

  using namespace QtDataVisualization;

  class CustomInputHandler : public Q3DInputHandler
  {
      Q_OBJECT

      enum InputState {
          StateNormal = 0,
          StateDraggingX,
          StateDraggingZ,
          StateDraggingY
      };

  public:
      explicit CustomInputHandler(QAbstract3DGraph *graph, QObject *parent = 0);

      inline void setLimits(float min, float max, float minRange) {
          m_areaMinValue = min;
          m_areaMaxValue = max;
          m_axisXMinValue = m_areaMinValue;
          m_axisXMaxValue = m_areaMaxValue;
          m_axisZMinValue = m_areaMinValue;
          m_axisZMaxValue = m_areaMaxValue;
          m_axisXMinRange = minRange;
          m_axisZMinRange = minRange;
      }
      inline void setAxes(QValue3DAxis *axisX, QValue3DAxis *axisY, QValue3DAxis *axisZ) {
          m_axisX = axisX;
          m_axisY = axisY;
          m_axisZ = axisZ;
      }
      inline void setAspectRatio(float ratio) { m_aspectRatio = ratio; }
      inline void setHighlightSeries(HighlightSeries *series) { m_highlight = series; }
      inline void setDragSpeedModifier(float modifier) { m_speedModifier = modifier; }

      virtual void mousePressEvent(QMouseEvent *event, const QPoint &mousePos);
      virtual void mouseMoveEvent(QMouseEvent *event, const QPoint &mousePos);
      virtual void mouseReleaseEvent(QMouseEvent *event, const QPoint &mousePos);
      virtual void wheelEvent(QWheelEvent *event);

  private:
      void handleElementSelected(QAbstract3DGraph::ElementType type);
      void handleAxisDragging();
      void checkConstraints();

  private:
      HighlightSeries *m_highlight;
      bool m_mousePressed;
      InputState m_state;
      QValue3DAxis *m_axisX;
      QValue3DAxis *m_axisY;
      QValue3DAxis *m_axisZ;
      float m_speedModifier;
      float m_aspectRatio;
      float m_axisXMinValue;
      float m_axisXMaxValue;
      float m_axisXMinRange;
      float m_axisZMinValue;
      float m_axisZMaxValue;
      float m_axisZMinRange;
      float m_areaMinValue;
      float m_areaMaxValue;
  };

  #endif