179 lines
4.1 KiB
C++
179 lines
4.1 KiB
C++
// Copyright (c) 2008 GeometryFactory Sarl (France).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org).
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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/GraphicsView/include/CGAL/Qt/GraphicsViewLineInput.h $
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// $Id: GraphicsViewLineInput.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
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// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
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//
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//
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// Author(s) : Andreas Fabri <Andreas.Fabri@geometryfactory.com>
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// Laurent Rineau <Laurent.Rineau@geometryfactory.com>
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#ifndef CGAL_QT_GRAPHICS_VIEW_LINE_INPUT_H
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#define CGAL_QT_GRAPHICS_VIEW_LINE_INPUT_H
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#include <CGAL/license/GraphicsView.h>
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#include <QGraphicsView>
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#include <QRectF>
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#include <QPointF>
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#include <QGraphicsItem>
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#include <QGraphicsLineItem>
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#include <QGraphicsScene>
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#include <QGraphicsSceneMouseEvent>
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#include <QPainter>
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#include <QStyleOption>
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#include <QKeyEvent>
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#include <CGAL/Qt/Converter.h>
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#include <CGAL/Qt/GraphicsViewInput.h>
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#include <CGAL/Qt/utility.h>
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namespace CGAL {
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namespace Qt {
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template <typename K>
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class GraphicsViewLineInput : public GraphicsViewInput
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{
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public:
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GraphicsViewLineInput(QObject *parent, QGraphicsScene* s);
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protected:
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virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
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virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
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virtual void keyPressEvent(QKeyEvent *event);
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bool eventFilter(QObject *obj, QEvent *event);
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private:
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QRectF boundingRect();
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QLineF qlinef();
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bool second;
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QGraphicsLineItem line;
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QPointF qsp, qtp;
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typename K::Point_2 sp, tp;
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typename K::Line_2 l;
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QGraphicsScene *scene_;
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Converter<K> convert;
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};
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template <typename K>
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QRectF
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GraphicsViewLineInput<K>::boundingRect()
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{
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QRectF rect = CGAL::Qt::viewportsBbox(scene_);
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return rect;
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}
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template <typename K>
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GraphicsViewLineInput<K>::GraphicsViewLineInput(QObject *parent, QGraphicsScene* s)
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: GraphicsViewInput(parent), second(false), scene_(s)
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{}
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template <typename K>
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QLineF
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GraphicsViewLineInput<K>::qlinef()
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{
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sp = convert(qsp);
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tp = convert(qtp);
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typename K::Line_2 l(sp,tp);
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QRectF qrect(boundingRect());
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typename K::Iso_rectangle_2 rect;
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rect = convert(qrect);
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Object o = intersection(l,rect);
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typename K::Segment_2 s;
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assign(s, o);
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return convert(s);
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}
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template <typename K>
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void
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GraphicsViewLineInput<K>::mousePressEvent(QGraphicsSceneMouseEvent *event)
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{
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if(event->modifiers() & ::Qt::ShiftModifier){
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return;
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}
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if(second){
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qtp = event->scenePos();
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sp = convert(qsp);
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tp = convert(qtp);
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scene_->removeItem(&line);
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Q_EMIT generate(CGAL::make_object(typename K::Line_2(sp,tp)));
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} else {
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qsp = event->scenePos();
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qtp = QPointF(qsp.x()+1, qsp.y());
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line.setLine(qlinef());
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scene_->addItem(&line);
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}
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second = !second;
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}
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template <typename K>
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void
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GraphicsViewLineInput<K>::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
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{
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qtp = event->scenePos();
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if(qtp == qsp){
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qtp = QPointF(qsp.x()+1, qsp.y());
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}
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line.setLine(qlinef());
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}
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template <typename K>
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void
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GraphicsViewLineInput<K>::keyPressEvent ( QKeyEvent * event )
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{
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if(event->key() != ::Qt::Key_Delete){ // need an anchored namespace to get away from CGAL::Qt
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return;
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}
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if(second){
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scene_->removeItem(&line);
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second = false;
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}
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}
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template <typename K>
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bool
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GraphicsViewLineInput<K>::eventFilter(QObject *obj, QEvent *event)
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{
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if (event->type() == QEvent::GraphicsSceneMousePress) {
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QGraphicsSceneMouseEvent *mouseEvent = static_cast<QGraphicsSceneMouseEvent *>(event);
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mousePressEvent(mouseEvent);
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return true;
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} else if (event->type() == QEvent::GraphicsSceneMouseMove) {
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QGraphicsSceneMouseEvent *mouseEvent = static_cast<QGraphicsSceneMouseEvent *>(event);
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mouseMoveEvent(mouseEvent);
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return true;
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} else if (event->type() == QEvent::KeyPress) {
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QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
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keyPressEvent(keyEvent);
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return true;
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} else{
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// standard event processing
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return QObject::eventFilter(obj, event);
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}
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}
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} // namespace Qt
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} // namespace CGAL
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#endif // CGAL_QT_GRAPHICS_VIEW_LINE_INPUT_H
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