File indexing completed on 2024-04-28 15:52:04

 // SPDX-FileCopyrightText: 2021 Carl Schwan <carlschwan@kde.org>
 //
 // SPDX-License-Identifier: LGPL-2.1-or-later
 
 #pragma once
 
 #include <QQuickItem>
 #include <QTime>
 #include <tessellation.rs.h>
 #include <QList>
 #include <QCursor>
 #include <optional>
 #include <QPainterPath>
 
 class DrawEvent
 {
 public:
     DrawEvent()
         : penWidth(10)
         , penColor(Qt::black)
         , fill(false)
     {
     }
 
     DrawEvent(float width, const QColor& color)
         : penWidth(width)
         , penColor(color)
         , fill(false)
     {
     }
 
     void lineTo(const QPoint& pos)
     {
         path.lineTo(pos);
     }
 
     float penWidth;
     QColor penColor;
     QPainterPath path;
     bool fill;
 };
 
 /**
  * @class DrawingArea
  * @brief The document view
  * 
  * This @c QQuickItem should be used in a @c Scene only.
  */
 class DrawingArea : public QQuickItem
 {
     Q_OBJECT
 
     Q_PROPERTY(QColor penColor READ penColor WRITE setPenColor NOTIFY penColorChanged)
     Q_PROPERTY(float penWidth READ penWidth WRITE setPenWidth NOTIFY penWidthChanged)
     Q_PROPERTY(bool canUndo READ canUndo NOTIFY canUndoChanged)
     Q_PROPERTY(Tool tool READ tool WRITE setTool NOTIFY toolChanged)
 
 public:
     enum Tool {
         Drawing,
         Rectangle,
         Circle,
     };
     Q_ENUM(Tool);
 
     explicit DrawingArea(QQuickItem *parent = nullptr);
     ~DrawingArea();
 
     Q_INVOKABLE void saveSvg(const QUrl &file);
 
     QColor penColor() const;
     void setPenColor(const QColor &color);
 
     double penWidth() const;
     void setPenWidth(double penWidth);
 
     Tool tool() const;
     void setTool(Tool tool);
 
     bool canUndo() const;
 
     void mouseReleaseEvent(QMouseEvent* e) override;
     void mouseMoveEvent(QMouseEvent* e) override;
     void mousePressEvent(QMouseEvent* e) override;
 
 public Q_SLOTS:
     void undo();
 
 Q_SIGNALS:
     void penColorChanged();
     void penWidthChanged();
     void canUndoChanged();
     void toolChanged();
 
 protected:
     QSGNode *updatePaintNode(QSGNode *, QQuickItem::UpdatePaintNodeData *) override;
 
 private:
     DrawEvent &currentDrawEvent();
     void ensureNewDrawEvent();
 
     QSGNode *createRootNode();
     QColor m_penColor;
     double m_penWidth = 4;
 
     bool m_needUpdate;
     QList<DrawEvent> m_drawEventList;
     QCursor m_drawCursor;
     QPoint m_lastPoint;
     QTime m_drawEventCreationTime;
     int m_eventIndex;
     bool m_drawing;
     int m_lastNumberOfEvent;
     Tool m_tool = Tool::Drawing;
 };