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#include "tikzit.h"
#include "nodeitem.h"
#include "tikzscene.h"
#include <cmath>
#include <QPen>
#include <QApplication>
#include <QBrush>
#include <QDebug>
#include <QFont>
#include <QFontMetrics>
#include <QPainterPathStroker>
NodeItem::NodeItem(Node *node)
{
_node = node;
setFlag(QGraphicsItem::ItemIsSelectable);
setFlag(QGraphicsItem::ItemIsMovable);
setFlag(QGraphicsItem::ItemSendsGeometryChanges);
readPos();
}
void NodeItem::readPos()
{
setPos(toScreen(_node->point()));
}
void NodeItem::writePos()
{
_node->setPoint(fromScreen(pos()));
}
QRectF NodeItem::labelRect() const {
QString label = _node->label();
//QFont f("Courier", 9);
QFontMetrics fm(Tikzit::LABEL_FONT);
QRectF rect = fm.boundingRect(label);
//rect.adjust(-2,-2,2,2);
rect.moveCenter(QPointF(0,0));
return rect;
}
void NodeItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
{
if (_node->style()->isNone()) {
QColor c(180,180,200);
painter->setPen(QPen(c));
painter->setBrush(QBrush(c));
painter->drawEllipse(QPointF(0,0), 1,1);
QPen pen(QColor(180,180,220));
QVector<qreal> p;
p << 2.0 << 2.0;
pen.setDashPattern(p);
painter->setPen(pen);
painter->setBrush(Qt::NoBrush);
painter->drawPath(shape());
} else {
QPen pen(_node->style()->strokeColor);
pen.setWidth(_node->style()->strokeThickness);
painter->setPen(pen);
painter->setBrush(QBrush(_node->style()->fillColor));
painter->drawPath(shape());
}
if (_node->label() != "") {
QRectF rect = labelRect();
QPen pen(QColor(200,0,0,120));
QVector<qreal> d;
d << 2.0 << 2.0;
pen.setDashPattern(d);
painter->setPen(pen);
painter->setBrush(QBrush(QColor(255,255,100,120)));
painter->drawRect(rect);
painter->setPen(QPen(Qt::black));
painter->setFont(Tikzit::LABEL_FONT);
painter->drawText(rect, Qt::AlignCenter, _node->label());
}
if (isSelected()) {
QPainterPath sh = shape();
QPainterPathStroker stroker;
stroker.setWidth(4);
QPainterPath outline = (stroker.createStroke(sh) + sh).simplified();
painter->setPen(Qt::NoPen);
painter->setBrush(QBrush(QColor(150,200,255,100)));
painter->drawPath(outline);
}
}
QPainterPath NodeItem::shape() const
{
QPainterPath path;
path.addEllipse(QPointF(0,0), GLOBAL_SCALEF * 0.1, GLOBAL_SCALEF * 0.1);
return path;
}
QRectF NodeItem::boundingRect() const
{
QRectF r = labelRect();
return r.united(shape().boundingRect()).adjusted(-4,-4,4,4);
}
Node *NodeItem::node() const
{
return _node;
}
QVariant NodeItem::itemChange(GraphicsItemChange change, const QVariant &value)
{
if (change == ItemPositionChange) {
QPointF newPos = value.toPointF();
int gridSize = GLOBAL_SCALE / 8;
QPointF gridPos(round(newPos.x()/gridSize)*gridSize, round(newPos.y()/gridSize)*gridSize);
_node->setPoint(fromScreen(gridPos));
return gridPos;
} else {
return QGraphicsItem::itemChange(change, value);
}
}
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