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// ************************************************************************** //
//
// BornAgain: simulate and fit scattering at grazing incidence
//
//! @file GUI/coregui/Views/SampleDesigner/NodeEditorConnection.cpp
//! @brief Implements class NodeEditorConnection
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************** //
#include "GUI/coregui/Views/SampleDesigner/NodeEditorConnection.h"
#include "Base/Utils/Assert.h"
#include "GUI/coregui/Views/SampleDesigner/ConnectableView.h"
#include <QBrush>
#include <QGraphicsScene>
#include <QPainter>
#include <QPen>
NodeEditorConnection::NodeEditorConnection(QGraphicsItem* parent, QGraphicsScene* scene)
: QGraphicsPathItem(parent), m_port1(0), m_port2(0)
{
setFlag(QGraphicsItem::ItemIsSelectable, true);
setPen(QPen(Qt::darkGray, 2));
setBrush(Qt::NoBrush);
setZValue(-1);
if (scene)
scene->addItem(this);
}
NodeEditorConnection::~NodeEditorConnection()
{
if (m_port1)
m_port1->remove(this);
if (m_port2)
m_port2->remove(this);
}
void NodeEditorConnection::setPos1(const QPointF& p)
{
pos1 = p;
}
void NodeEditorConnection::setPos2(const QPointF& p)
{
pos2 = p;
}
void NodeEditorConnection::setPort1(NodeEditorPort* p)
{
m_port1 = p;
m_port1->append(this);
setPos1(p->scenePos());
}
void NodeEditorConnection::setPort2(NodeEditorPort* p)
{
m_port2 = p;
m_port2->append(this);
setPos2(p->scenePos());
}
void NodeEditorConnection::updatePosFromPorts()
{
pos1 = m_port1->scenePos();
pos2 = m_port2->scenePos();
}
void NodeEditorConnection::updatePath()
{
QPainterPath p;
p.moveTo(pos1);
qreal dx = pos2.x() - pos1.x();
dx = qMax(dx, 200.);
QPointF ctr1(pos1.x() + dx * 0.25, pos1.y());
QPointF ctr2(pos2.x() - dx * 0.25, pos2.y());
p.cubicTo(ctr1, ctr2, pos2);
setPath(p);
}
NodeEditorPort* NodeEditorConnection::port1() const
{
return m_port1;
}
NodeEditorPort* NodeEditorConnection::port2() const
{
return m_port2;
}
NodeEditorPort* NodeEditorConnection::inputPort()
{
ASSERT(m_port1 && m_port2);
return (m_port1->isInput() ? m_port1 : m_port2);
}
NodeEditorPort* NodeEditorConnection::outputPort()
{
ASSERT(m_port1 && m_port2);
return (m_port1->isOutput() ? m_port1 : m_port2);
}
void NodeEditorConnection::paint(QPainter* painter, const QStyleOptionGraphicsItem* option,
QWidget* widget)
{
Q_UNUSED(option)
Q_UNUSED(widget)
painter->setPen(QPen(Qt::darkGray, 2));
painter->setBrush(Qt::NoBrush);
if (isSelected()) {
painter->setPen(Qt::DashLine);
}
painter->drawPath(path());
}
ConnectableView* NodeEditorConnection::getParentView()
{
ASSERT(inputPort() != outputPort());
ConnectableView* result = dynamic_cast<ConnectableView*>(inputPort()->parentItem());
ASSERT(result);
return result;
}
ConnectableView* NodeEditorConnection::getChildView()
{
ASSERT(inputPort() != outputPort());
ConnectableView* result = dynamic_cast<ConnectableView*>(outputPort()->parentItem());
ASSERT(result);
return result;
}
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