nodeeditor/src/ConnectionGraphicsObject.cpp at bt3 · BehaviorTree/nodeeditor · GitHub

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#include "ConnectionGraphicsObject.hpp"

#include "AbstractGraphModel.hpp"

#include "AbstractNodeGeometry.hpp"

#include "BasicGraphicsScene.hpp"

#include "ConnectionIdUtils.hpp"

#include "ConnectionPainter.hpp"

#include "ConnectionState.hpp"

#include "ConnectionStyle.hpp"

#include "NodeConnectionInteraction.hpp"

#include "NodeGraphicsObject.hpp"

#include "StyleCollection.hpp"

#include "locateNode.hpp"

#include <QtWidgets/QGraphicsBlurEffect>

#include <QtWidgets/QGraphicsDropShadowEffect>

#include <QtWidgets/QGraphicsSceneMouseEvent>

#include <QtWidgets/QGraphicsView>

#include <QtWidgets/QStyleOptionGraphicsItem>

#include <QtCore/QDebug>

#include <stdexcept>

namespace QtNodes {

ConnectionGraphicsObject::ConnectionGraphicsObject(BasicGraphicsScene &scene,

ConnectionId const connectionId)

: _connectionId(connectionId)

, _graphModel(scene.graphModel())

, _connectionState(*this)

, _out{0, 0}

, _in{0, 0}

{

scene.addItem(this);

setFlag(QGraphicsItem::ItemIsMovable, true);

setFlag(QGraphicsItem::ItemIsFocusable, true);

setFlag(QGraphicsItem::ItemIsSelectable, true);

setAcceptHoverEvents(true);

//addGraphicsEffect();

setZValue(-1.0);

initializePosition();

}

void ConnectionGraphicsObject::initializePosition()

{

// This function is only called when the ConnectionGraphicsObject

// is newly created. At this moment both end coordinates are (0, 0)

// in Connection G.O. coordinates. The position of the whole

// Connection G. O. in scene coordinate system is also (0, 0).

// By moving the whole object to the Node Port position

// we position both connection ends correctly.

if (_connectionState.requiredPort() != PortType::None) {

PortType attachedPort = oppositePort(_connectionState.requiredPort());

PortIndex portIndex = getPortIndex(attachedPort, _connectionId);

NodeId nodeId = getNodeId(attachedPort, _connectionId);

NodeGraphicsObject *ngo = nodeScene()->nodeGraphicsObject(nodeId);

if (ngo) {

QTransform nodeSceneTransform = ngo->sceneTransform();

AbstractNodeGeometry &geometry = nodeScene()->nodeGeometry();

QPointF pos = geometry.portScenePosition(nodeId,

attachedPort,

portIndex,

nodeSceneTransform);

this->setPos(pos);

}

move();

}

AbstractGraphModel &ConnectionGraphicsObject::graphModel() const

{

return _graphModel;

}

BasicGraphicsScene *ConnectionGraphicsObject::nodeScene() const

{

return dynamic_cast<BasicGraphicsScene *>(scene());

}

ConnectionId const &ConnectionGraphicsObject::connectionId() const

{

return _connectionId;

}

QRectF ConnectionGraphicsObject::boundingRect() const

{

auto points = pointsC1C2();

// `normalized()` fixes inverted rects.

QRectF basicRect = QRectF(_out, _in).normalized();

QRectF c1c2Rect = QRectF(points.first, points.second).normalized();

QRectF commonRect = basicRect.united(c1c2Rect);

auto const &connectionStyle = StyleCollection::connectionStyle();

float const diam = connectionStyle.pointDiameter();

QPointF const cornerOffset(diam, diam);

// Expand rect by port circle diameter

commonRect.setTopLeft(commonRect.topLeft() - cornerOffset);

commonRect.setBottomRight(commonRect.bottomRight() + 2 * cornerOffset);

return commonRect;

}

QPainterPath ConnectionGraphicsObject::shape() const

{

#ifdef DEBUG_DRAWING

//QPainterPath path;

//path.addRect(boundingRect());

//return path;

#else

return ConnectionPainter::getPainterStroke(*this);

#endif

}

QPointF const &ConnectionGraphicsObject::endPoint(PortType portType) const

{

Q_ASSERT(portType != PortType::None);

return (portType == PortType::Out ? _out : _in);

}

void ConnectionGraphicsObject::setEndPoint(PortType portType, QPointF const &point)

{

if (portType == PortType::In)

_in = point;

else

_out = point;

}

void ConnectionGraphicsObject::move()

{

auto moveEnd = [this](ConnectionId cId, PortType portType) {

NodeId nodeId = getNodeId(portType, cId);

if (nodeId == InvalidNodeId)

return;

NodeGraphicsObject *ngo = nodeScene()->nodeGraphicsObject(nodeId);

if (ngo) {

AbstractNodeGeometry &geometry = nodeScene()->nodeGeometry();

QPointF scenePos = geometry.portScenePosition(nodeId,

portType,

getPortIndex(portType, cId),

ngo->sceneTransform());

QPointF connectionPos = sceneTransform().inverted().map(scenePos);

setEndPoint(portType, connectionPos);

}

};

moveEnd(_connectionId, PortType::Out);

moveEnd(_connectionId, PortType::In);

prepareGeometryChange();

update();

}

void ConnectionGraphicsObject::lock(bool locked)

{

setFlag(QGraphicsItem::ItemIsMovable, !locked);

setFlag(QGraphicsItem::ItemIsFocusable, !locked);

setFlag(QGraphicsItem::ItemIsSelectable, !locked);

}

ConnectionState const &ConnectionGraphicsObject::connectionState() const

{

return _connectionState;

}

ConnectionState &ConnectionGraphicsObject::connectionState()

{

return _connectionState;

}

ConnectionStyle ConnectionGraphicsObject::connectionStyle() const

{

auto connectionStyle = StyleCollection::connectionStyle();

//-------------------------------------------

// This is a BehaviorTree specific code, not applicable to upstream

const auto &defaultStyle = StyleCollection::nodeStyle();

auto inNodeStyle = _graphModel.nodeData(_connectionId.inNodeId, NodeRole::Style);

QJsonDocument json = QJsonDocument::fromVariant(inNodeStyle);

NodeStyle nodeStyle(json.object());

// In real-time monitoring mode, the color of the connection should be the same

// as the NormalBoundaryColor.

// We recognize this case by the fact that nodeStyle and defaultStyle are different

if (defaultStyle.ConnectionPointColor != nodeStyle.ConnectionPointColor) {

auto connectionJson = connectionStyle.toJson();

auto connectionJsonObj = connectionJson["ConnectionStyle"].toObject();

connectionJsonObj["NormalColor"] = nodeStyle.ConnectionPointColor.name();

connectionJson["ConnectionStyle"] = connectionJsonObj;

connectionStyle.loadJson(connectionJson);

}

//-------------------------------------------

return connectionStyle;

}

void ConnectionGraphicsObject::paint(QPainter *painter,

QStyleOptionGraphicsItem const *option,

QWidget *)

{

if (!scene())

return;

painter->setClipRect(option->exposedRect);

ConnectionPainter::paint(painter, *this);

}

void ConnectionGraphicsObject::mousePressEvent(QGraphicsSceneMouseEvent *event)

{

QGraphicsItem::mousePressEvent(event);

}

void ConnectionGraphicsObject::mouseMoveEvent(QGraphicsSceneMouseEvent *event)

{

prepareGeometryChange();

auto view = static_cast<QGraphicsView *>(event->widget());

auto ngo = locateNodeAt(event->scenePos(), *nodeScene(), view->transform());

if (ngo) {

ngo->reactToConnection(this);

_connectionState.setLastHoveredNode(ngo->nodeId());

} else {

_connectionState.resetLastHoveredNode();

}

//-------------------

auto requiredPort = _connectionState.requiredPort();

if (requiredPort != PortType::None) {

setEndPoint(requiredPort, event->pos());

}

//-------------------

update();

event->accept();

}

void ConnectionGraphicsObject::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)

{

QGraphicsItem::mouseReleaseEvent(event);

ungrabMouse();

event->accept();

auto view = static_cast<QGraphicsView *>(event->widget());

Q_ASSERT(view);

auto ngo = locateNodeAt(event->scenePos(), *nodeScene(), view->transform());

bool wasConnected = false;

if (ngo) {

NodeConnectionInteraction interaction(*ngo, *this, *nodeScene());

wasConnected = interaction.tryConnect();

}

// If connection attempt was unsuccessful

if (!wasConnected) {

// Resulting unique_ptr is not used and automatically deleted.

nodeScene()->resetDraftConnection();

}

void ConnectionGraphicsObject::hoverEnterEvent(QGraphicsSceneHoverEvent *event)

{

_connectionState.setHovered(true);

update();

// Signal

nodeScene()->connectionHovered(connectionId(), event->screenPos());

event->accept();

}

void ConnectionGraphicsObject::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)

{

_connectionState.setHovered(false);

update();

// Signal

nodeScene()->connectionHoverLeft(connectionId());

event->accept();

}

std::pair<QPointF, QPointF> ConnectionGraphicsObject::pointsC1C2() const

{

switch (nodeScene()->orientation()) {

case Qt::Horizontal:

return pointsC1C2Horizontal();

break;

case Qt::Vertical:

return pointsC1C2Vertical();

break;

}

throw std::logic_error("Unreachable code after switch statement");

}

void ConnectionGraphicsObject::addGraphicsEffect()

{

auto effect = new QGraphicsBlurEffect;

effect->setBlurRadius(5);

setGraphicsEffect(effect);

//auto effect = new QGraphicsDropShadowEffect;

//auto effect = new ConnectionBlurEffect(this);

//effect->setOffset(4, 4);

//effect->setColor(QColor(Qt::gray).darker(800));

}

std::pair<QPointF, QPointF> ConnectionGraphicsObject::pointsC1C2Horizontal() const

{

double const defaultOffset = 200;

double xDistance = _in.x() - _out.x();

double horizontalOffset = qMin(defaultOffset, std::abs(xDistance));

double verticalOffset = 0;

double ratioX = 0.5;

if (xDistance <= 0) {

double yDistance = _in.y() - _out.y() + 20;

double vector = yDistance < 0 ? -1.0 : 1.0;

verticalOffset = qMin(defaultOffset, std::abs(yDistance)) * vector;

ratioX = 1.0;

}

horizontalOffset *= ratioX;

// overrides the default one by groot!

const double minOffset = 40;

double ratio = (xDistance <= 0) ? 1.0 : 0.4;

double offset = std::abs(xDistance) * ratio;

offset = std::clamp(offset, minOffset, defaultOffset);

horizontalOffset = offset;

verticalOffset = 0;

QPointF c1(_out.x() + horizontalOffset, _out.y() + verticalOffset);

QPointF c2(_in.x() - horizontalOffset, _in.y() - verticalOffset);

return std::make_pair(c1, c2);

}

std::pair<QPointF, QPointF> ConnectionGraphicsObject::pointsC1C2Vertical() const

{

double const defaultOffset = 200;

double yDistance = _in.y() - _out.y();

double verticalOffset = qMin(defaultOffset, std::abs(yDistance));

double horizontalOffset = 0;

double ratioY = 0.5;

if (yDistance <= 0) {

double xDistance = _in.x() - _out.x() + 20;

double vector = xDistance < 0 ? -1.0 : 1.0;

horizontalOffset = qMin(defaultOffset, std::abs(xDistance)) * vector;

ratioY = 1.0;

}

verticalOffset *= ratioY;

// overrides the default one by groot!

const double minOffset = 40;

double ratio = (yDistance <= 0) ? 1.0 : 0.4;

double offset = std::abs(yDistance) * ratio;

offset = std::clamp(offset, minOffset, defaultOffset);

horizontalOffset = 0;

verticalOffset = offset;

QPointF c1(_out.x() + horizontalOffset, _out.y() + verticalOffset);

QPointF c2(_in.x() - horizontalOffset, _in.y() - verticalOffset);

return std::make_pair(c1, c2);

}

void ConnectionGraphicsObject::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)

{

if (!flags().testFlag(QGraphicsItem::ItemIsSelectable)) {

return;

}

Q_EMIT nodeScene()->connectionContextMenu(_connectionId, mapToScene(event->pos()));

}

} // namespace QtNodes

nodeeditor/src/ConnectionGraphicsObject.cpp at bt3 · BehaviorTree/nodeeditor · GitHub

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