#include "toonzqt/schematicnode.h"

#include <qgraphicsscenemouseevent></qgraphicsscenemouseevent>

#include <qstyleoptiongraphicsitem></qstyleoptiongraphicsitem>

#include <qkeyevent></qkeyevent>

#include <algorithm></algorithm>

#include <qapplication></qapplication>

#include <qtextdocument></qtextdocument>

#include <qtextcursor></qtextcursor>

#include <qtextblock></qtextblock>

#include <qmenubar></qmenubar>

#include <qpolygonf></qpolygonf>

#include "tundo.h"

#include "toonzqt/menubarcommand.h"

//========================================================

//

//StageSchematicName

//

//========================================================

SchematicName::SchematicName(QGraphicsItem *parent, double width, double height)

	: QGraphicsTextItem("", parent), m_width(width), m_height(height)

{

	setFlag(QGraphicsItem::ItemIsSelectable, true);

	setFlag(QGraphicsItem::ItemIsFocusable, true);

	setTextInteractionFlags(Qt::TextEditorInteraction);

	connect(document(), SIGNAL(contentsChanged()), this, SLOT(onContentsChanged()));

}

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

SchematicName::~SchematicName()

{

}

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

void SchematicName::setName(const QString &name)

{

	setPlainText(name);

}

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

void SchematicName::onContentsChanged()

{

	QString text = document()->toPlainText();

	QTextCursor cursor = textCursor();

	int position = cursor.position();

	if (position > 0 && text.at(position - 1) == '\n') {

		text.remove("\n");

		setPlainText(text);

		;

		emit focusOut();

	}

}

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

void SchematicName::focusOutEvent(QFocusEvent *fe)

{

	qApp->removeEventFilter(this);

	if (fe->reason() == Qt::MouseFocusReason)

		emit focusOut();

}

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

void SchematicName::keyPressEvent(QKeyEvent *ke)

{

	if (ke->key() == Qt::Key_Left || ke->key() == Qt::Key_Right) {

		QTextCursor cursor = textCursor();

		int currentPos = cursor.position();

		if (ke->key() == Qt::Key_Left)

			cursor.setPosition(currentPos - 1);

		else

			cursor.setPosition(currentPos + 1);

		setTextCursor(cursor);

	} else

		QGraphicsTextItem::keyPressEvent(ke);

}

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

bool SchematicName::eventFilter(QObject *object, QEvent *event)

{

	if (event->type() == QEvent::Shortcut ||

		event->type() == QEvent::ShortcutOverride) {

		if (!object->inherits("QGraphicsView")) {

			event->accept();

			return true;

		}

	}

	return false;

}

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

void SchematicName::focusInEvent(QFocusEvent *fe)

{

	QGraphicsTextItem::focusInEvent(fe);

	qApp->installEventFilter(this);

	QTextDocument *doc = document();

	QTextCursor cursor(doc->begin());

	cursor.select(QTextCursor::Document);

	setTextCursor(cursor);

}

//========================================================

//

//class SchematicThumbnailToggle

//

//========================================================

SchematicThumbnailToggle::SchematicThumbnailToggle(SchematicNode *parent, bool isOpened)

	: QGraphicsItem(parent), m_isDown(!isOpened)

{

}

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

SchematicThumbnailToggle::~SchematicThumbnailToggle()

{

}

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

QRectF SchematicThumbnailToggle::boundingRect() const

{

	return QRectF(0, 0, 14, 14);

}

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

void SchematicThumbnailToggle::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

{

	QPixmap onPixmap(":Resources/schematic_thumbtoggle_on.png");

	QPixmap offPixmap(":Resources/schematic_thumbtoggle_off.png");

	QRect rect(3, 3, 8, 8);

	if (m_isDown) {

		painter->drawPixmap(rect, offPixmap);

	} else

		painter->drawPixmap(rect, onPixmap);

}

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

void SchematicThumbnailToggle::setIsDown(bool value)

{

	m_isDown = value;

	emit(toggled(!m_isDown));

}

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

void SchematicThumbnailToggle::mousePressEvent(QGraphicsSceneMouseEvent *me)

{

	m_isDown = !m_isDown;

	emit(toggled(!m_isDown));

}

//========================================================

//

//SchematicToggle

//

//========================================================

SchematicToggle::SchematicToggle(SchematicNode *parent, const QPixmap &pixmap, int flags, bool isLargeScaled)

	: QGraphicsItem(parent), m_pixmap1(pixmap), m_pixmap2(), m_state(0), m_flags(flags), m_width(isLargeScaled ? 18 : 30), m_height(isLargeScaled ? 7 : 5)

{

}

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

SchematicToggle::SchematicToggle(SchematicNode *parent, const QPixmap &pixmap1, const QPixmap &pixmap2, int flags, bool isLargeScaled)

	: QGraphicsItem(parent), m_pixmap1(pixmap1), m_pixmap2(pixmap2), m_state(0), m_flags(flags), m_width(isLargeScaled ? 18 : 30), m_height(isLargeScaled ? 7 : 5)

{

}

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

SchematicToggle::~SchematicToggle()

{

}

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

QRectF SchematicToggle::boundingRect() const

{

	return QRectF(0, 0, m_width, m_height);

}

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

void SchematicToggle::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

{

	if (m_state != 0) {

		QPixmap &pix = (m_state == 2 && !m_pixmap2.isNull()) ? m_pixmap2 : m_pixmap1;

		painter->drawPixmap(boundingRect().toRect(), pix);

	}

}

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

void SchematicToggle::mousePressEvent(QGraphicsSceneMouseEvent *me)

{

	if (me->button() == Qt::LeftButton) {

		if (m_pixmap2.isNull()) {

			m_state = 1 - m_state;

			emit(toggled(m_state != 0));

		} else if (m_flags & eEnableNullState) {

			m_state = (m_state + 1) % 3;

			emit(stateChanged(m_state));

		} else {

			m_state = 3 - m_state;

			emit(stateChanged(m_state));

		}

	}

	if (me->button() == Qt::RightButton) {

		SchematicNode *parent = dynamic_cast<schematicnode *="">(this->parentItem());</schematicnode>

		if (parent)

			parent->onClicked();

	}

}

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

void SchematicToggle::contextMenuEvent(QGraphicsSceneContextMenuEvent *cme)

{

	if (!(m_flags & eIsParentColumn))

		return;

	if (m_pixmap2.isNull()) {

		QMenu *menu = new QMenu(0);

		CommandManager *cmdManager = CommandManager::instance();

		menu->addAction(cmdManager->getAction("MI_EnableThisColumnOnly"));

		menu->addAction(cmdManager->getAction("MI_EnableSelectedColumns"));

		menu->addAction(cmdManager->getAction("MI_EnableAllColumns"));

		menu->addAction(cmdManager->getAction("MI_DisableAllColumns"));

		menu->addAction(cmdManager->getAction("MI_DisableSelectedColumns"));

		menu->addAction(cmdManager->getAction("MI_SwapEnabledColumns"));

		QAction *action = menu->exec(cme->screenPos());

	} else {

		QMenu *menu = new QMenu(0);

		CommandManager *cmdManager = CommandManager::instance();

		menu->addAction(cmdManager->getAction("MI_ActivateThisColumnOnly"));

		menu->addAction(cmdManager->getAction("MI_ActivateSelectedColumns"));

		menu->addAction(cmdManager->getAction("MI_ActivateAllColumns"));

		menu->addAction(cmdManager->getAction("MI_DeactivateAllColumns"));

		menu->addAction(cmdManager->getAction("MI_DeactivateSelectedColumns"));

		menu->addAction(cmdManager->getAction("MI_ToggleColumnsActivation"));

		QAction *action = menu->exec(cme->screenPos());

	}

}

//========================================================

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

/*! for Spline Aim and CP toggles

*/

void SchematicToggle_SplineOptions::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

{

	QRectF rect = boundingRect();

	painter->fillRect(rect, Qt::white);

	if (m_state != 0) {

		QPixmap &pix = (m_state == 2 && !m_pixmap2.isNull()) ? m_pixmap2 : m_pixmap1;

		painter->drawPixmap(boundingRect().toRect(), pix);

	}

	painter->setBrush(Qt::NoBrush);

	painter->setPen(QColor(180, 180, 180, 255));

	painter->drawRect(rect);

}

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

/*! for Spline Aim and CP toggles

*/

void SchematicToggle_SplineOptions::mousePressEvent(QGraphicsSceneMouseEvent *me)

{

	SchematicToggle::mousePressEvent(me);

	update();

}

//========================================================

//

//SchematicHandleSpinBox

//

//========================================================

SchematicHandleSpinBox::SchematicHandleSpinBox(QGraphicsItem *parent)

	: QGraphicsItem(parent), m_buttonState(Qt::NoButton), m_delta(0)

{

	setFlag(QGraphicsItem::ItemIsSelectable, false);

	setFlag(QGraphicsItem::ItemIsFocusable, false);

	m_pixmap = QPixmap(":Resources/schematic_spin_arrows.svg");

}

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

SchematicHandleSpinBox::~SchematicHandleSpinBox()

{

}

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

QRectF SchematicHandleSpinBox::boundingRect() const

{

	return QRectF(0, 0, 10, 10);

}

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

void SchematicHandleSpinBox::paint(QPainter *painter,

								   const QStyleOptionGraphicsItem *option, QWidget *widget)

{

	QRectF rect = boundingRect();

	painter->drawPixmap(rect.toRect(), m_pixmap);

	painter->setBrush(QColor(0, 0, 0, 0));

	painter->setPen(QColor(128, 128, 128, 255));

	painter->drawRect(rect);

}

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

void SchematicHandleSpinBox::mouseMoveEvent(QGraphicsSceneMouseEvent *me)

{

	if (m_buttonState == Qt::LeftButton) {

		bool increase = false;

		int delta = me->screenPos().y() - me->lastScreenPos().y();

		if (delta < 0)

			increase = true;

		m_delta += abs(delta);

		if (m_delta > 5) {

			if (increase)

				emit(modifyHandle(1));

			else

				emit(modifyHandle(-1));

			m_delta = 0;

			emit sceneChanged();

		}

	}

}

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

void SchematicHandleSpinBox::mousePressEvent(QGraphicsSceneMouseEvent *me)

{

	m_buttonState = me->button();

	TUndoManager::manager()->beginBlock();

}

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

void SchematicHandleSpinBox::mouseReleaseEvent(QGraphicsSceneMouseEvent *me)

{

	m_buttonState = Qt::NoButton;

	m_delta = 0;

	TUndoManager::manager()->endBlock();

	emit handleReleased();

}

//========================================================

//

//class SchematicLink

//

//========================================================

SchematicLink::SchematicLink(QGraphicsItem *parent, QGraphicsScene *scene)

#if QT_VERSION >= 0x050000

	: QGraphicsItem(parent)

#else

	: QGraphicsItem(parent, scene)

#endif

	  ,

	  m_startPort(0), m_endPort(0), m_path(), m_hitPath(), m_lineShaped(false), m_highlighted(false)

{

#if QT_VERSION >= 0x050000

	scene->addItem(this);

#endif

	setFlag(QGraphicsItem::ItemIsMovable, false);

	setFlag(QGraphicsItem::ItemIsSelectable, true);

	setFlag(QGraphicsItem::ItemIsFocusable, false);

	setZValue(0.0);

}

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

SchematicLink::~SchematicLink()

{

	m_startPort = m_endPort = 0;

}

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

QRectF SchematicLink::boundingRect() const

{

	return m_hitPath.boundingRect().adjusted(-5, -5, 5, 5);

}

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

QPainterPath SchematicLink::shape() const

{

	return m_hitPath;

}

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

void SchematicLink::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

{

	if (getStartPort() &&

		(getStartPort()->getType() == 100		 //eStageSplinePort

		 || getStartPort()->getType() == 202)) { //eFxLinkPort

		if (isSelected() || isHighlighted())

			painter->setPen(QColor(255, 255, 10));

		else

			painter->setPen(QColor(50, 255, 50, 128));

	} else if (isSelected() || isHighlighted())

		painter->setPen(QPen(Qt::cyan));

	else if (!m_lineShaped)

		painter->setPen(QPen(Qt::white));

	else

		painter->setPen(QPen(QColor(170, 170, 10), 0, Qt::DashLine));

	painter->setRenderHint(QPainter::Antialiasing, true);

	painter->drawPath(m_path);

}

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

void SchematicLink::updatePath(const QPointF &startPos, const QPointF &endPos)

{

	prepareGeometryChange();

	setPos(startPos);

	if (!m_lineShaped) {

		QPointF p0((endPos.x() - startPos.x()) * 0.5, 0);

		QPointF p1(p0.x(), endPos.y() - startPos.y());

		QPointF p2(endPos - startPos);

		m_path = QPainterPath(QPointF(0, 0));

		m_path.cubicTo(p0, p1, p2);

		QPointF h(0, 5);

		QPointF p = h;

		if (p2.y() > 0)

			p.setX(p2.x() > 0 ? -5 : 5);

		else

			p.setX(p2.x() > 0 ? 5 : -5);

		m_hitPath = QPainterPath(QPointF(0, 0));

		m_hitPath.lineTo(h);

		m_hitPath.cubicTo(p0 + p, p1 + p, p2 + h);

		m_hitPath.lineTo(p2 - h);

		m_hitPath.cubicTo(p1 - p, p0 - p, -h);

		m_hitPath.lineTo(0, 0);

	} else {

		m_path = QPainterPath(QPointF(0, 0));

		m_path.lineTo(endPos - startPos);

		m_hitPath = QPainterPath(QPointF(0, 0));

		m_hitPath.lineTo(endPos - startPos);

	}

}

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

void SchematicLink::updatePath(SchematicPort *startPort, SchematicPort *endPort)

{

	updatePath(startPort->getLinkEndPoint(), endPort->getLinkEndPoint());

}

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

SchematicPort *SchematicLink::getOtherPort(const SchematicPort *port) const

{

	if (port == m_startPort)

		return m_endPort;

	else if (port == m_endPort)

		return m_startPort;

	else

		return 0;

}

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

SchematicNode *SchematicLink::getOtherNode(const SchematicNode *node) const

{

	if (node == m_startPort->getNode())

		return m_endPort->getNode();

	else if (node == m_endPort->getNode())

		return m_startPort->getNode();

	else

		return 0;

}

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

void SchematicLink::mousePressEvent(QGraphicsSceneMouseEvent *me)

{

	QPointF pos = me->scenePos();

	SchematicPort *startPort = getStartPort();

	SchematicPort *endPort = getEndPort();

	if (startPort && endPort) {

		QRectF startRect = startPort->boundingRect();

		startRect.moveTopLeft(startPort->scenePos());

		QRectF endRect = endPort->boundingRect();

		endRect.moveTopLeft(endPort->scenePos());

		if (startRect.contains(pos) || endRect.contains(pos)) {

			me->ignore();

			return;

		}

	}

	QMatrix matrix = scene()->views()[0]->matrix();

#if QT_VERSION >= 0x050000

	double scaleFactor = sqrt(matrix.determinant());

#else

	double scaleFactor = sqrt(matrix.det());

#endif

	QPointF startPos = getStartPort()->getLinkEndPoint();

	QPointF endPos = getEndPort()->getLinkEndPoint();

	QPointF p0((endPos.x() - startPos.x()) * 0.5, 0);

	QPointF p1(p0.x(), endPos.y() - startPos.y());

	QPointF p2(endPos - startPos);

	double sensibility = 5 / scaleFactor;

	QPointF h(0, sensibility);

	QPointF p = h;

	if (p2.y() > 0)

		p.setX(p2.x() > 0 ? -sensibility : sensibility);

	else

		p.setX(p2.x() > 0 ? sensibility : -sensibility);

	QPainterPath path(QPointF(0, 0));

	path.lineTo(h);

	path.cubicTo(p0 + p, p1 + p, p2 + h);

	path.lineTo(p2 - h);

	path.cubicTo(p1 - p, p0 - p, -h);

	path.lineTo(0, 0);

	if (!path.contains(me->scenePos() - scenePos())) {

		me->ignore();

		return;

	}

	if (!isSelected()) {

		if (me->modifiers() != Qt::ControlModifier)

			scene()->clearSelection();

		if (me->button() == Qt::LeftButton || me->button() == Qt::RightButton)

			setSelected(true);

	} else {

		if (me->modifiers() == Qt::ControlModifier && me->button() == Qt::LeftButton)

			setSelected(false);

	}

}

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

void SchematicLink::mouseReleaseEvent(QGraphicsSceneMouseEvent *me)

{

	if (me->modifiers() != Qt::ControlModifier && me->button() != Qt::RightButton)

		QGraphicsItem::mouseReleaseEvent(me);

}

//========================================================

//

//class SchematicPort

//

//========================================================

SchematicPort::SchematicPort(QGraphicsItem *parent, SchematicNode *node, int type)

	: QGraphicsItem(parent), m_node(node), m_buttonState(Qt::NoButton), m_highlighted(false), m_ghostLink(0), m_linkingTo(0), m_hook(0, 0), m_type(type)

{

#if QT_VERSION >= 0x050000

	setAcceptHoverEvents(false);

#else

	setAcceptsHoverEvents(false);

#endif

	setFlag(QGraphicsItem::ItemIsSelectable, false);

	setFlag(QGraphicsItem::ItemIsFocusable, false);

}

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

SchematicPort::~SchematicPort()

{

	m_links.clear();

}

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

void SchematicPort::mouseMoveEvent(QGraphicsSceneMouseEvent *me)

{

	if (m_buttonState != Qt::LeftButton)

		return;

	if (!m_ghostLink)

		return;

	if (m_linkingTo) {

		showSnappedLinks();

		m_linkingTo = 0;

	}

	//Snapping

	SchematicPort *linkingTo = searchPort(me->scenePos());

	if (!linkingTo) {

		if (m_linkingTo) {

			m_linkingTo->highLight(false);

			m_linkingTo->update();

		}

		m_ghostLink->updatePath(this->getLinkEndPoint(), me->scenePos());

		m_linkingTo = linkingTo;

	}

	// if to be connected something

	else if (linkingTo != this) {

		m_ghostLink->updatePath(this, linkingTo);

		m_linkingTo = linkingTo;

		hideSnappedLinks();

	}

	//autopan

	QGraphicsView *viewer = scene()->views()[0];

	viewer->setInteractive(false);

	viewer->ensureVisible(QRectF(me->scenePos(), QSizeF(1, 1)), 5, 5);

	viewer->setInteractive(true);

}

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

void SchematicPort::mousePressEvent(QGraphicsSceneMouseEvent *me)

{

	if (!isSelected()) {

		if (me->modifiers() != Qt::ControlModifier)

			scene()->clearSelection();

		if (me->button() == Qt::LeftButton || me->button() == Qt::RightButton)

			getNode()->setSelected(true);

	} else {

		if (me->modifiers() == Qt::ControlModifier && me->button() == Qt::LeftButton)

			getNode()->setSelected(false);

	}

	getNode()->onClicked();

	if (me->button() == Qt::LeftButton && getType() != 202 // eFxLinkPort

		&& getType() != 203								   // eFxGroupedInPort

		&& getType() != 204								   // eFxGroupedOutPort

		&& getType() != 103								   // eStageSplineGroupPort

		&& getType() != 104								   // eStageParentGroupPort

		&& getType() != 105)							   // eStageChildGroupPort

	{

		m_buttonState = Qt::LeftButton;

		QPointF endPos(me->pos());

		m_ghostLink = new SchematicLink(0, scene());

		m_ghostLink->setZValue(3.0);

		m_ghostLink->updatePath(this->getLinkEndPoint(), me->scenePos());

		emit(isClicked());

	}

}

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

void SchematicPort::mouseReleaseEvent(QGraphicsSceneMouseEvent *me)

{

	if (me->modifiers() != Qt::ControlModifier && me->button() != Qt::RightButton)

		QGraphicsItem::mouseReleaseEvent(me);

	if (m_ghostLink)

		m_ghostLink->hide();

	if (m_buttonState == Qt::LeftButton)

		emit(isReleased(me->scenePos()));

	//The link is added to the scene only if the user released the left mouse button over

	//a SchematicPort different from SchematicPort of the parent node.

	if (m_buttonState == Qt::LeftButton &&

		m_linkingTo && !isLinkedTo(m_linkingTo) &&

		linkTo(m_linkingTo, true)) {

		linkTo(m_linkingTo);

		m_buttonState = Qt::NoButton;

		m_linkingTo = 0;

		emit sceneChanged();

		emit xsheetChanged();

	} else

		showSnappedLinks();

}

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

void SchematicPort::removeLink(SchematicLink *link)

{

	m_links.removeAll(link);

}

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

void SchematicPort::eraseLink(SchematicLink *link)

{

	SchematicPort *otherPort = link->getOtherPort(this);

	if (otherPort)

		otherPort->removeLink(link);

	removeLink(link);

	if (link->scene())

		link->scene()->removeItem(link);

	delete link;

}

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

void SchematicPort::eraseAllLinks()

{

	while (!m_links.empty())

		eraseLink(m_links[0]);

}

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

SchematicLink *SchematicPort::makeLink(SchematicPort *port)

{

	if (isLinkedTo(port) || !port)

		return 0;

	SchematicLink *link = new SchematicLink(0, scene());

	if (getType() == 202 && port->getType() == 202)

		link->setLineShaped(true);

	link->setStartPort(this);

	link->setEndPort(port);

	addLink(link);

	port->addLink(link);

	link->updatePath();

	return link;

}

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

bool SchematicPort::isLinkedTo(SchematicPort *port) const

{

	if (m_links.size() == 0)

		return false;

	int i;

	for (i = 0; i < m_links.size(); i++) {

		SchematicLink *link = m_links[i];

		if (((link->getStartPort() == this && link->getEndPort() == port) ||

			 (link->getEndPort() == this && link->getStartPort() == port)) &&

			link->isVisible())

			return true;

	}

	return false;

}

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

void SchematicPort::updateLinksGeometry()

{

	int linkCount = getLinkCount();

	int i;

	for (i = 0; i < linkCount; i++) {

		SchematicLink *link = getLink(i);

		SchematicPort *startPort = link->getStartPort();

		SchematicPort *endPort = link->getEndPort();

		if (startPort && endPort) {

			link->updatePath(startPort, endPort);

			link->setPos(startPort->getLinkEndPoint());

		}

	}

}

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

QPointF SchematicPort::getLinkEndPoint() const

{

	return scenePos() + m_hook;

}

//========================================================

//

//class SchematicNode

//

//========================================================

/*! \class SchematicNode schematicnode.h "../inlcude/toonzqt/schematicnode.h"

	\brief The class provides methods to draw and handle a node item in the SchematicScene.

*/

/*! \fn SchematicPort *SchematicNode::getInputPort() const

	Returns the input SchematicPort of the node.

*/

/*! \fn SchematicPort *SchematicNode::getOutputPort() const

	Returns the output SchematicPort of the node.

*/

/*! \fn SchematicScene* SchematicNode::getScene() const

	Returns the scene where the node is placed.

*/

SchematicNode::SchematicNode(SchematicScene *scene)

#if QT_VERSION >= 0x050000

	: QGraphicsItem(0)

#else

	: QGraphicsItem(0, scene)

#endif

	  ,

	  m_scene(scene), m_width(0), m_height(0), m_buttonState(Qt::NoButton)

{

#if QT_VERSION >= 0x050000

	scene->addItem(this);

#endif

	setFlag(QGraphicsItem::ItemIsMovable, false);

	setFlag(QGraphicsItem::ItemIsSelectable, true);

	setFlag(QGraphicsItem::ItemIsFocusable, false);

	setZValue(1.0);

}

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

SchematicNode::~SchematicNode()

{

}

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

/*!Reimplements the pure virtual QGraphicsItem::boundingRect() method.

*/

QRectF SchematicNode::boundingRect() const

{

	return QRectF(0, 0, 1, 1);

}

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

/*! Reimplements the pure virtual QGraphicsItem::paint() method.

*/

void SchematicNode::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

{

	QPen pen;

	if (isSelected()) {

		painter->setBrush(QColor(0, 0, 0, 0));

		pen.setColor(QColor(255, 255, 255, 255));

		pen.setWidth(4.0);

		pen.setJoinStyle(Qt::RoundJoin);

		painter->setPen(pen);

		painter->drawRect(-2, -2, m_width + 4, m_height + 4);

	}

	pen.setColor(QColor(0, 0, 0, 255));

	pen.setWidth(0);

	painter->setPen(pen);

}

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

/*! Reimplements the QGraphicsItem::mouseMoveEvent() method.

*/

void SchematicNode::mouseMoveEvent(QGraphicsSceneMouseEvent *me)

{

	QList<qgraphicsitem *=""> items = scene()->selectedItems();</qgraphicsitem>

	if (items.empty())

		return;

	QList<qgraphicsitem *="">::iterator it = items.begin();</qgraphicsitem>

	QPointF delta = me->scenePos() - me->lastScenePos();

	QGraphicsView *viewer = scene()->views()[0];

	it = items.begin();

	for (it; it != items.end(); it++) {

		SchematicNode *node = dynamic_cast<schematicnode *="">(*it);</schematicnode>

		if (node) {

			node->setPosition(node->scenePos() + delta);

			node->setSchematicNodePos(node->scenePos());

			node->updateLinksGeometry();

		}

	}

	viewer->setInteractive(false);

	viewer->ensureVisible(QRectF(me->scenePos(), QSizeF(1, 1)), 5, 5);

	viewer->setInteractive(true);

}

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

void SchematicNode::mousePressEvent(QGraphicsSceneMouseEvent *me)

{

	if (!isSelected()) {

		if (me->modifiers() != Qt::ControlModifier)

			scene()->clearSelection();

		if (me->button() == Qt::LeftButton || me->button() == Qt::RightButton)

			setSelected(true);

	} else {