cable.hpp

Go to the documentation of this file.

#pragma once
 
#include <QCursor>
#include <QGraphicsObject>
#include <QGraphicsScene>
#include <QGraphicsSceneMouseEvent>
#include <QGuiApplication>
#include <QPainter>
 
#include "pad.hpp"
 
enum class DirectionalPlane { Horizontal, Vertical };
inline DirectionalPlane &operator!(DirectionalPlane &plane)
{
    return plane = plane == DirectionalPlane::Horizontal ? DirectionalPlane::Vertical
                                                         : DirectionalPlane::Horizontal;
}
 
struct CableSegment
{
    DirectionalPlane plane;
    QPoint start_point;
    QPoint end_point;
    // @TODO: Cable segments should also have a next and previous pointers and a mechansim for special
    // cases like connection split or the end of a cable. This would make it easier to manage the segments and their connections.
};
 
class Cable : public QGraphicsObject
{
    Q_OBJECT
 
public:
    explicit Cable(QGraphicsItem *parent, const Pad *start_pad);
 
    void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *) override;
    QRectF boundingRect() const override;

    void setEditable(bool editable);

    inline bool isEditable() const { return m_editable; }
 
protected:
    void previewCable(QPoint point);

    void corner();

    void endCorner(QPoint point);
 
    QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
    void hoverMoveEvent(QGraphicsSceneHoverEvent *event) override;
    void hoverLeaveEvent(QGraphicsSceneHoverEvent *event) override;
    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
 
private slots:
    void updateStartCablePosition();
    void updateEndCablePosition();
 
private:
    void updateBoundingRect(QRectF new_rect);
    Pad *getPadAtScenePos(const QPointF &scene_pos) const;
    void initiateConnection(Pad *end_pad);
 
    QList<CableSegment> m_cable_segments;
    const Pad *m_start_pad = nullptr;
    Pad *m_end_pad = nullptr;
    Pad *m_hovered_pad = nullptr;
    bool m_editable = true;
    bool m_first_scene = true;
    // Do not access directly, use updateBoundingRect() to update repaint.
    QRectF m_bounding_rect;
};