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#pragma once
#include "graphing.h"
#include <QWidget>
/**
* The generic base class for a graph's view, this is the component that
* displays the actual data for the graph.
*
* - Stores the view area within the graph
* - Simple user interaction such as translating and zooming with mouse
* - Selection tracking synchronised with axis
*/
class GraphView : public QWidget {
Q_OBJECT
public:
GraphView(QWidget* parent = 0);
virtual ~GraphView(){}
virtual void update();
virtual void resizeEvent(QResizeEvent *) override;
virtual void wheelEvent(QWheelEvent *e) override;
virtual void mouseMoveEvent(QMouseEvent *e) override;
virtual void mousePressEvent(QMouseEvent *e) override;
virtual void mouseDoubleClickEvent(QMouseEvent *e) override;
virtual void setSelectionState(SelectionState* state);
void setHorizontalView(qint64 start, qint64 end);
void setVerticalView(qint64 start, qint64 end);
protected:
void setDefaultView(qint64 min, qint64 max);
signals:
void selectionChanged();
void verticalViewChanged(qint64 start, qint64 end);
void verticalRangeChanged(qint64 min, qint64 max);
void horizontalRangeChanged(qint64 min, qint64 max);
void horizontalViewChanged(qint64 start, qint64 end);
protected:
/* Viewport area */
qint64 m_viewLeft;
qint64 m_viewRight;
qint64 m_viewBottom;
qint64 m_viewTop;
/* Graph limits */
qint64 m_graphLeft;
qint64 m_graphRight;
qint64 m_graphBottom;
qint64 m_graphTop;
/* Viewport width (m_viewRight - m_viewLeft), used for zoom */
qint64 m_viewWidth;
qint64 m_viewWidthMin;
qint64 m_viewWidthMax;
/* Viewport height (m_viewTop - m_viewBottom), used for zoom */
qint64 m_viewHeight;
qint64 m_viewHeightMin;
qint64 m_viewHeightMax;
/* Mouse tracking */
QPoint m_mousePressPosition;
qint64 m_mousePressViewLeft;
qint64 m_mousePressViewBottom;
/* Selection */
SelectionState* m_selectionState;
/* State from the last update() call */
struct PreviousUpdate {
qint64 m_viewLeft;
qint64 m_viewRight;
qint64 m_viewBottom;
qint64 m_viewTop;
qint64 m_graphLeft;
qint64 m_graphRight;
qint64 m_graphBottom;
qint64 m_graphTop;
} m_previous;
};
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