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https://github.com/qelectrotech/qelectrotech-source-mirror.git
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Laurent Trinques
79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
/*
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Copyright 2006-2026 The QElectroTech Team
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This file is part of QElectroTech.
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QElectroTech is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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QElectroTech is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with QElectroTech. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef DIAGRAMEVENTADDCABLE_H
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#define DIAGRAMEVENTADDCABLE_H
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#include "../cable/cablemanager.h"
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#include "diagrameventinterface.h"
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class QLineF;
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class QGraphicsLineItem;
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/**
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@brief The DiagramEventAddCable class draws the trunk line of a cable.
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It behaves like every other drawing tool of QElectroTech: the first
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click puts the start point down, the mouse then shows the line as it
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will be, and either a second click or the release of a drag lays it
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-- whichever the user does, he does not have to aim at anything.
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The line stays horizontal or vertical, whichever way the user pulls
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harder, and it keeps following him: the direction is worked out again
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on every mouse move (with a dead band so it does not flicker), never
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frozen by the first stray pixel of the gesture -- a cable trunk runs
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straight along a row of drawings, but along the row the user meant.
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*/
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class DiagramEventAddCable : public DiagramEventInterface
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{
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Q_OBJECT
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public:
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explicit DiagramEventAddCable(Diagram *diagram);
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~DiagramEventAddCable() override;
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void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
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void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
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void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
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void keyPressEvent(QKeyEvent *event) override;
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void init() override;
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private:
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void reset();
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void updatePreview(const QPointF &scene_pos);
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QPointF finishPoint(const QPointF &scene_pos) const;
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void finishLine(const QPointF &end);
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void showGuides(const QPointF &scene_pos);
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void clearHint() const;
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void updateHint() const;
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private:
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QGraphicsLineItem *m_preview = nullptr;
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///The cross QElectroTech shows while any shape is drawn
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QGraphicsLineItem *m_help_horiz = nullptr;
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QGraphicsLineItem *m_help_verti = nullptr;
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///True once the first click has put the line's start down
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bool m_has_anchor = false;
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QPointF m_anchor;
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///Which way the line is locked:
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///-1 undecided, 0 horizontal, 1 vertical
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int m_axis = -1;
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QList<CableCrossing> m_crossings;
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};
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#endif // DIAGRAMEVENTADDCABLE_H
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