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// ************************************************************************** //
//
// BornAgain: simulate and fit scattering at grazing incidence
//
//! @file GUI/ba3d/view/canvas.h
//! @brief Defines Canvas class
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************** //
#ifndef BORNAGAIN_GUI_BA3D_VIEW_CANVAS_H
#define BORNAGAIN_GUI_BA3D_VIEW_CANVAS_H
#include "GUI/ba3d/def.h"
#include <QHash>
#include <QOpenGLFunctions>
#include <QOpenGLShaderProgram>
#include <QOpenGLWidget>
namespace RealSpace
{
class Camera;
class Program;
class Model;
class Geometry;
class Buffer;
class Object;
class Canvas : public QOpenGLWidget, protected QOpenGLFunctions
{
Q_OBJECT
friend class Object;
public:
Canvas();
~Canvas();
void setBgColor(QColor const&);
// active things, owned elsewhere, may be nullptr
void setCamera(Camera*);
void setProgram(Program*);
void setModel(Model*);
Model* getModel();
// ToolBar Actions
void defaultView();
void sideView();
void topView();
// Flying Camera implementation (similar to Blender's camera system)
void horizontalCameraTurn(float angle);
void verticalCameraTurn(float angle);
Camera* cam() { return camera; }
private:
QRect viewport;
float aspectRatio, colorBgR, colorBgG, colorBgB;
int currentZoomLevel; // current configuration of mousewheel w.r.t to default (0) configuration
void setCamera(bool full = true);
void initializeGL();
void resizeGL(int, int);
void paintGL();
QPoint e_last; // latest mouse event's (x,y) screen coordinates
QMatrix4x4 matModel, matProj;
QVector3D unproject(QPoint const&);
enum { btnNONE, btnTURN, btnZOOM } mouseButton;
void mousePressEvent(QMouseEvent*);
void mouseMoveEvent(QMouseEvent*);
void mouseReleaseEvent(QMouseEvent*);
void wheelEvent(QWheelEvent*);
Camera* camera;
Program* program;
Model* model;
QMetaObject::Connection modelUpdated;
QHash<Geometry const*, Buffer*> buffers;
void releaseBuffer(Geometry const*);
void releaseBuffers();
void draw(QColor const&, QMatrix4x4 const&, Geometry const&);
void cleanup();
bool isInitialized() const;
bool m_isInitializedGL;
};
} // namespace RealSpace
#endif // BORNAGAIN_GUI_BA3D_VIEW_CANVAS_H
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