155 lines
3.9 KiB
C++
155 lines
3.9 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/GraphicsViewIsoRectangleInput.h $
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// $Id: GraphicsViewIsoRectangleInput.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_ISO_RECTANGLE_INPUT_H
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#define CGAL_QT_GRAPHICS_VIEW_ISO_RECTANGLE_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 <QGraphicsRectItem>
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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/array.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 GraphicsViewIsoRectangleInput : public GraphicsViewInput
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{
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public:
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GraphicsViewIsoRectangleInput(QObject *parent, QGraphicsScene* s);
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~GraphicsViewIsoRectangleInput();
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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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typedef typename K::Point_2 Point_2;
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QPointF qp, qq, qr;
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Point_2 p, q, r;
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QGraphicsRectItem *rectItem;
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QPointF rect_first_point;
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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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GraphicsViewIsoRectangleInput<K>::GraphicsViewIsoRectangleInput(QObject *parent, QGraphicsScene* s)
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: GraphicsViewInput(parent), rectItem(new QGraphicsRectItem), scene_(s)
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{
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rectItem->setBrush(QBrush());
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scene_->addItem(rectItem);
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rectItem->hide();
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rectItem->setZValue(10000);
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}
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template <typename K>
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GraphicsViewIsoRectangleInput<K>::~GraphicsViewIsoRectangleInput()
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{
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delete rectItem;
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}
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template <typename K>
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void
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GraphicsViewIsoRectangleInput<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(event->button() == ::Qt::LeftButton) {
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if(rectItem->isVisible()) {
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// we have clicked twice
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Q_EMIT generate(CGAL::make_object(convert(rectItem->rect())));
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rectItem->hide();
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} else {
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// we enter a first point
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rect_first_point = event->scenePos();
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rectItem->setRect(QRectF(rect_first_point, rect_first_point));
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rectItem->show();
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}
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}
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}
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template <typename K>
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void
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GraphicsViewIsoRectangleInput<K>::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
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{
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// todo: only do this if no modifiers are pressed at the same time
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if(rectItem->isVisible()) {
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rectItem->setRect(QRectF(rect_first_point,
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event->scenePos()));
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}
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}
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template <typename K>
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void
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GraphicsViewIsoRectangleInput<K>::keyPressEvent ( QKeyEvent * event )
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{
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}
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template <typename K>
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bool
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GraphicsViewIsoRectangleInput<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_ISO_RECTANGLE_INPUT_H
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