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#ifndef BARCHART_H
#define BARCHART_H
#include <vector>
#include <QtQuick>
#include <armadillo>
#include "colorscale.h"
#include "scale.h"
class BarChart
: public QQuickItem
{
Q_OBJECT
public:
BarChart(QQuickItem *parent = 0);
~BarChart();
signals:
void valuesChanged(const arma::vec &values) const;
void colorScaleChanged(const ColorScale *scale) const;
void selectionChanged(const std::vector<bool> &selection) const;
void selectionInteractivelyChanged(const std::vector<bool> &selection) const;
void itemBrushed(int item, float value) const;
void itemInteractivelyBrushed(int item) const;
public slots:
void setValues(const arma::vec &values);
void updateValues(const arma::vec &values);
void setColorScale(const ColorScale *scale);
void setSelection(const std::vector<bool> &selection);
void brushItem(int item);
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:
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_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;
arma::vec m_values;
const ColorScale *m_colorScale;
std::vector<int> m_originalIndices, m_currentIndices;
LinearScale<float> m_scale;
};
#endif // BARCHART_H
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