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// Copyright (c) 2008 GeometryFactory Sarl (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1.1/GraphicsView/include/CGAL/Qt/GraphicsViewIsoRectangleInput.h $
// $Id: include/CGAL/Qt/GraphicsViewIsoRectangleInput.h 08b27d3db14 $
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
//
// Author(s) : Andreas Fabri <Andreas.Fabri@geometryfactory.com>
// Laurent Rineau <Laurent.Rineau@geometryfactory.com>
#ifndef CGAL_QT_GRAPHICS_VIEW_ISO_RECTANGLE_INPUT_H
#define CGAL_QT_GRAPHICS_VIEW_ISO_RECTANGLE_INPUT_H
#include <CGAL/license/GraphicsView.h>
#include <QGraphicsView>
#include <QRectF>
#include <QPointF>
#include <QGraphicsItem>
#include <QGraphicsRectItem>
#include <QGraphicsScene>
#include <QGraphicsSceneMouseEvent>
#include <QPainter>
#include <QStyleOption>
#include <QKeyEvent>
#include <CGAL/Qt/Converter.h>
#include <CGAL/Qt/GraphicsViewInput.h>
#include <CGAL/array.h>
namespace CGAL {
namespace Qt {
template <typename K>
class GraphicsViewIsoRectangleInput : public GraphicsViewInput
{
public:
GraphicsViewIsoRectangleInput(QObject *parent, QGraphicsScene* s);
~GraphicsViewIsoRectangleInput();
protected:
virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
virtual void keyPressEvent(QKeyEvent *event);
bool eventFilter(QObject *obj, QEvent *event);
private:
typedef typename K::Point_2 Point_2;
QPointF qp, qq, qr;
Point_2 p, q, r;
QGraphicsRectItem *rectItem;
QPointF rect_first_point;
QGraphicsScene *scene_;
Converter<K> convert;
};
template <typename K>
GraphicsViewIsoRectangleInput<K>::GraphicsViewIsoRectangleInput(QObject *parent, QGraphicsScene* s)
: GraphicsViewInput(parent), rectItem(new QGraphicsRectItem), scene_(s)
{
rectItem->setBrush(QBrush());
scene_->addItem(rectItem);
rectItem->hide();
rectItem->setZValue(10000);
}
template <typename K>
GraphicsViewIsoRectangleInput<K>::~GraphicsViewIsoRectangleInput()
{
delete rectItem;
}
template <typename K>
void
GraphicsViewIsoRectangleInput<K>::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
if(event->modifiers() & ::Qt::ShiftModifier){
return;
}
if(event->button() == ::Qt::LeftButton) {
if(rectItem->isVisible()) {
// we have clicked twice
Q_EMIT generate(CGAL::make_object(convert(rectItem->rect())));
rectItem->hide();
} else {
// we enter a first point
rect_first_point = event->scenePos();
rectItem->setRect(QRectF(rect_first_point, rect_first_point));
rectItem->show();
}
}
}
template <typename K>
void
GraphicsViewIsoRectangleInput<K>::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
// todo: only do this if no modifiers are pressed at the same time
if(rectItem->isVisible()) {
rectItem->setRect(QRectF(rect_first_point,
event->scenePos()));
}
}
template <typename K>
void
GraphicsViewIsoRectangleInput<K>::keyPressEvent ( QKeyEvent * event )
{
}
template <typename K>
bool
GraphicsViewIsoRectangleInput<K>::eventFilter(QObject *obj, QEvent *event)
{
if (event->type() == QEvent::GraphicsSceneMousePress) {
QGraphicsSceneMouseEvent *mouseEvent = static_cast<QGraphicsSceneMouseEvent *>(event);
mousePressEvent(mouseEvent);
return true;
} else if (event->type() == QEvent::GraphicsSceneMouseMove) {
QGraphicsSceneMouseEvent *mouseEvent = static_cast<QGraphicsSceneMouseEvent *>(event);
mouseMoveEvent(mouseEvent);
return true;
} else if (event->type() == QEvent::KeyPress) {
QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
keyPressEvent(keyEvent);
return true;
} else{
// standard event processing
return QObject::eventFilter(obj, event);
}
}
} // namespace Qt
} // namespace CGAL
#endif // CGAL_QT_GRAPHICS_VIEW_ISO_RECTANGLE_INPUT_H
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