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#ifndef BARCHART_H
#define BARCHART_H
#include <memory>
#include <vector>
#include <armadillo>
#include <glad/gl.h>
#include <nod.hpp>
#include "scale.h"
#include "shader.h"
class BarChart
{
public:
BarChart();
size_t width() const { return m_width; }
size_t height() const { return m_height; }
GLuint texture() const { return m_outTex; }
nod::signal<void(const arma::vec &)> valuesChanged;
nod::signal<void(const std::vector<bool> &)> selectionChanged;
nod::signal<void(const std::vector<bool> &)> selectionInteractivelyChanged;
nod::signal<void(int, float)> itemBrushed;
nod::signal<void(int)> itemInteractivelyBrushed;
void setSize(size_t, size_t);
void setValues(const arma::vec &values);
void updateValues(const arma::vec &values);
void setColormap(GLuint texture);
void setSelection(const std::vector<bool> &selection);
void brushItem(int item);
void update();
void draw();
// protected:
// QSGNode *updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *);
// void hoverEnterEvent(QHoverEvent *event);
// void hoverMoveEvent(QHoverEvent *event);
// void hoverLeaveEvent(QHoverEvent *event);
// void mousePressEvent(QMouseEvent *event);
// void mouseMoveEvent(QMouseEvent *event);
// void mouseReleaseEvent(QMouseEvent *event);
private:
void updateBars();
// QSGNode *newSceneGraph() const;
// QSGNode *newBarNode() const;
// QSGNode *newSelectionBarNode() const;
// void updateViewport(QSGNode *root) const;
// void updateBarNodeGeom(QSGNode *barNode, float x, float width, float height) const;
// void updateBarNodeColor(QSGNode *barNode, const QColor &color) const;
// void updateBars(QSGNode *node) const;
bool m_redraw;
bool m_shouldUpdateBars;
// void updatePreSelection(QSGNode *node) const;
bool m_shouldUpdatePreSelection;
float m_dragStartPos, m_dragLastPos;
// void updateSelectionBar(QSGNode *node, float x, float barWidth, const QColor &color) const;
// void updateSelectionBars(QSGNode *node) const;
bool m_shouldUpdateSelection;
void interactiveSelection(float start, float end);
std::vector<bool> m_selection;
// void updateBrush(QSGNode *node) const;
int m_brushedItem;
int itemAt(float x, bool includeSelectorWidth = false) const;
size_t m_width, m_height;
GLuint m_FBO, m_VAO, m_VBO, m_colormapTex, m_outTex;
std::unique_ptr<Shader> m_shader;
arma::vec m_values;
std::vector<int> m_originalIndices, m_currentIndices;
LinearScale<float> m_scale;
};
#endif // BARCHART_H
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