File indexing completed on 2024-06-16 04:35:04

 /*
     SPDX-FileCopyrightText: 2016 Nicolas Carion
     SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
 */
 
 #pragma once
 
 #include "../../../bpoint.h"
 #include <QWidget>
 #include <memory>
 
 #include <QPainter>
 
 /** State of a point being moved */
 enum class State_t { NORMAL, DRAG };
 
 /** @class __dummy_AbstractCurveWidget
     @brief This class is a workaround to be able to use templating in the actual class
     Note that Qt doesn't support templated signals, so we have to define a signal for
     all possible Point type
 */
 class __dummy_AbstractCurveWidget : public QWidget
 {
     Q_OBJECT
 public:
     __dummy_AbstractCurveWidget(QWidget *parent)
         : QWidget(parent)
     {
     }
 
 Q_SIGNALS:
     /**
      * Emitted whenever a control point has changed position.
      */
     void modified();
     /**
        Signal sent when the current point changes. The point is returned, as well as a flag that determines if the point is the first or last.
     */
     void currentPoint(const QPointF &p, bool extremal);
     void currentPoint(const BPoint &p, bool extremal);
     void resized(const QSize &s);
 
 public Q_SLOTS:
     /** @brief Delete current spline point if it is not a extremal point (first or last)
      */
     virtual void slotDeleteCurrentPoint() = 0;
     virtual void slotZoomIn() = 0;
     virtual void slotZoomOut() = 0;
     virtual void reset() = 0;
 };
 
 /** @brief Base class of all the widgets representing a curve of points
 
  */
 template <typename Curve_t> class AbstractCurveWidget : public __dummy_AbstractCurveWidget
 {
 public:
     typedef typename Curve_t::Point_t Point_t; // NOLINT
     ~AbstractCurveWidget() override = default;
 
     /** @param parent Optional parent of the widget
      */
     AbstractCurveWidget(QWidget *parent = nullptr);
 
     /** @brief Returns whether the points are controlled with additional handles
      */
     virtual bool hasHandles() { return false; }
 
     /** @brief Sets the maximal number of points of the curve
      */
     void setMaxPoints(int max);
 
     /** @brief Sets the background pixmap to @param pixmap.
         The background pixmap will be drawn under the grid and the curve*/
     void setPixmap(const QPixmap &pixmap);
 
     /** @brief Number of lines used in grid. */
     int gridLines() const;
 
     /** @brief Sets the number of grid lines to draw (in one direction) to @param lines. */
     void setGridLines(int lines);
 
     /** @brief Constructs the curve from @param string
      */
     void setFromString(const QString &string);
 
     /** @brief Resets the curve to an empty one
      */
     void reset() override;
 
     /** @brief Returns a string corresponding to the curve
      */
     QString toString();
 
     /** @brief Replaces current point with @param p (index stays the same).
      * @param final (default = true) Q_EMIT signal modified? */
     void updateCurrentPoint(const Point_t &p, bool final = true);
 
     /** @brief Returns the selected point or else empty point. */
     Point_t getCurrentPoint();
 
     /** @brief Returns the list of all the points. */
     virtual QList<Point_t> getPoints() const = 0;
 
 public:
     /** @brief Delete current spline point if it is not a extremal point (first or last)
      */
     void slotDeleteCurrentPoint() override;
     void slotZoomIn() override;
     void slotZoomOut() override;
 
 protected:
     void paintBackground(QPainter *p);
     int heightForWidth(int w) const override;
     void resizeEvent(QResizeEvent *event) override;
     void leaveEvent(QEvent *) override;
     void mouseReleaseEvent(QMouseEvent *e) override;
     void keyPressEvent(QKeyEvent *) override;
     /**
        Utility function to check if current selected point is the first or the last
     */
     bool isCurrentPointExtremal();
 
     int m_zoomLevel{0};
     int m_gridLines{3};
     /** Background */
     QPixmap m_pixmap;
     /** A copy of m_pixmap but scaled to fit the size of the edit region */
     std::shared_ptr<QPixmap> m_pixmapCache;
     /** Whether we have to regenerate the pixmap cache because the pixmap or the size of the edit region changed. */
     bool m_pixmapIsDirty{true};
 
     int m_currentPointIndex{-1};
     int m_maxPoints{1000000};
     int m_wWidth, m_wHeight;
 
     State_t m_state{State_t::NORMAL};
     Curve_t m_curve;
 
     double m_grabRadius{10};
 };
 
 #include "abstractcurvewidget.ipp"