- Qt 6.6
- Qt Graphs
- Graph Gallery
- Qt Graphs | Commercial or GPLv3

# Graph Gallery

     // Copyright (C) 2023 The Qt Company Ltd.
     // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

     #ifndef CUSTOMINPUTHANDLER_H
     #define CUSTOMINPUTHANDLER_H

     #include "highlightseries.h"

     #include <QtGraphs/q3dinputhandler.h>
     #include <QtGraphs/qabstract3dgraph.h>
     #include <QtGraphs/qvalue3daxis.h>

     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; }

     protected:
         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 = nullptr;
         bool m_mousePressed = false;
         InputState m_state = StateNormal;
         QValue3DAxis *m_axisX = nullptr;
         QValue3DAxis *m_axisY = nullptr;
         QValue3DAxis *m_axisZ = nullptr;
         float m_speedModifier = 20.f;
         float m_aspectRatio = 0.f;
         float m_axisXMinValue = 0.f;
         float m_axisXMaxValue = 0.f;
         float m_axisXMinRange = 0.f;
         float m_axisZMinValue = 0.f;
         float m_axisZMaxValue = 0.f;
         float m_axisZMinRange = 0.f;
         float m_areaMinValue = 0.f;
         float m_areaMaxValue = 0.f;
     };

     #endif