diagrameventaddshape.h

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/*
        Copyright 2006-2026 The QElectroTech Team
        This file is part of QElectroTech.
 
        QElectroTech is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 2 of the License, or
        (at your option) any later version.
 
        QElectroTech is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.
 
        You should have received a copy of the GNU General Public License
        along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DIAGRAMEVENTADDSHAPE_H
#define DIAGRAMEVENTADDSHAPE_H
 
#include "../qetgraphicsitem/qetshapeitem.h"
#include "diagrameventinterface.h"
 
class QGraphicsEllipseItem;

class DiagramEventAddShape : public DiagramEventInterface
{
                Q_OBJECT
 
        public:
                DiagramEventAddShape(Diagram *diagram, QetShapeItem::ShapeType shape_type);
 
                ~DiagramEventAddShape() override;
                void mousePressEvent       (QGraphicsSceneMouseEvent *event) override;
                void mouseMoveEvent        (QGraphicsSceneMouseEvent *event) override;
                void mouseReleaseEvent     (QGraphicsSceneMouseEvent *event) override;
                void mouseDoubleClickEvent (QGraphicsSceneMouseEvent *event) override;
                void keyPressEvent         (QKeyEvent *event) override;
                void keyReleaseEvent       (QKeyEvent *event) override;
                void init() override;
 
        private:
                void updateHelpCross (const QPointF &p);
                void applyPosition (const QPointF &pos, Qt::KeyboardModifiers mods);
                void updateCreationHint () const;
                QString beforeClickHint () const;
                QString afterClickHint () const;
                void showCenterMarker (const QPointF &scenePos);
                void hideCenterMarker ();
                void reapplyLastPosition (QKeyEvent *event);
 
        protected:
                QetShapeItem::ShapeType  m_shape_type;
                QetShapeItem            *m_shape_item;
                QGraphicsLineItem       *m_help_horiz, *m_help_verti;
                QPointF                  m_anchor_point;   // the shape's first-click point -- meaningful once m_shape_item exists
                QGraphicsEllipseItem    *m_center_marker = nullptr;   // shown only while Ctrl-anchoring is actually in effect, so it doubles as confirmation that it is
                bool                     m_center_anchored = false;   // decided once, at the first click -- see applyPosition()'s doc comment for why
                QPointF                  m_last_mouse_scene_pos;      // raw, unsnapped -- lets a modifier-only change re-snap correctly when reapplied
};
 
#endif // DIAGRAMEVENTADDSHAPE_H