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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file GUI/coregui/Views/SampleDesigner/NodeEditor.cpp
//! @brief Implements class NodeEditor
//!
//! @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/NodeEditor.h"
#include "GUI/coregui/Views/SampleDesigner/DesignerView.h"
#include "GUI/coregui/Views/SampleDesigner/NodeEditorConnection.h"
#include "GUI/coregui/Views/SampleDesigner/NodeEditorPort.h"
#include <QEvent>
#include <QGraphicsScene>
#include <QGraphicsSceneMouseEvent>
NodeEditor::NodeEditor(QObject* parent) : QObject(parent), m_scene(0), m_conn(0) {}
void NodeEditor::install(QGraphicsScene* scene)
{
scene->installEventFilter(this);
m_scene = scene;
}
QGraphicsItem* NodeEditor::itemAt(const QPointF& pos)
{
QList<QGraphicsItem*> items = m_scene->items(QRectF(pos - QPointF(1, 1), QSize(3, 3)));
for (QGraphicsItem* item : items)
if (item->type() > QGraphicsItem::UserType)
return item;
return nullptr;
}
bool NodeEditor::eventFilter(QObject* object, QEvent* event)
{
QGraphicsSceneMouseEvent* mouseEvent = dynamic_cast<QGraphicsSceneMouseEvent*>(event);
if (!mouseEvent)
return QObject::eventFilter(object, event);
bool isProcessedEvent(false);
if (event->type() == QEvent::GraphicsSceneMousePress) {
isProcessedEvent = processMousePress(mouseEvent);
} else if (event->type() == QEvent::GraphicsSceneMouseMove) {
isProcessedEvent = processMouseMove(mouseEvent);
} else if (event->type() == QEvent::GraphicsSceneMouseRelease) {
isProcessedEvent = processMouseRelease(mouseEvent);
}
return isProcessedEvent ? isProcessedEvent : QObject::eventFilter(object, event);
}
bool NodeEditor::processMousePress(QGraphicsSceneMouseEvent* event)
{
bool result(false);
if (m_conn == 0 && event->button() == Qt::LeftButton) {
QGraphicsItem* item = itemAt(event->scenePos());
if (item && item->type() == ViewTypes::NODE_EDITOR_PORT) {
emit selectionModeChangeRequest(DesignerView::SIMPLE_SELECTION);
m_conn = new NodeEditorConnection(0, m_scene);
m_conn->setPort1((NodeEditorPort*)item);
m_conn->setPos1(item->scenePos());
m_conn->setPos2(event->scenePos());
m_conn->updatePath();
result = true;
}
}
return result;
}
bool NodeEditor::processMouseMove(QGraphicsSceneMouseEvent* event)
{
bool result(false);
if (m_conn) {
m_conn->setPos2(event->scenePos());
m_conn->updatePath();
result = true;
}
return result;
}
bool NodeEditor::processMouseRelease(QGraphicsSceneMouseEvent* event)
{
bool result(false);
if (m_conn && event->button() == Qt::LeftButton) {
emit selectionModeChangeRequest(DesignerView::RUBBER_SELECTION);
QGraphicsItem* item = itemAt(event->scenePos());
if (item && item->type() == ViewTypes::NODE_EDITOR_PORT) {
NodeEditorPort* port1 = m_conn->port1();
NodeEditorPort* port2 = (NodeEditorPort*)item;
if (port1->parentItem() != port2->parentItem() && port1->isOutput() != port2->isOutput()
&& !port1->isConnected(port2) && port1->getPortType() == port2->getPortType()) {
m_conn->setPos2(port2->scenePos());
m_conn->setPort2(port2);
m_conn->updatePath();
emit connectionIsEstablished(m_conn);
m_conn = 0;
return true;
}
}
delete m_conn;
m_conn = 0;
result = true;
}
return result;
}
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