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Diffstat (limited to 'src/gui/edgeitem.cpp')
| -rw-r--r-- | src/gui/edgeitem.cpp | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/gui/edgeitem.cpp b/src/gui/edgeitem.cpp new file mode 100644 index 0000000..48f321e --- /dev/null +++ b/src/gui/edgeitem.cpp @@ -0,0 +1,230 @@ +/* + TikZiT - a GUI diagram editor for TikZ + Copyright (C) 2018 Aleks Kissinger + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. +*/ + +#include "tikzit.h" +#include "edgeitem.h" + +#include <QPainterPath> +#include <QPen> + +EdgeItem::EdgeItem(Edge *edge) +{ + _edge = edge; + setFlag(QGraphicsItem::ItemIsSelectable); + + _cp1Item = new QGraphicsEllipseItem(this); + _cp1Item->setParentItem(this); + _cp1Item->setRect(GLOBAL_SCALEF * (-0.1), GLOBAL_SCALEF * (-0.1), + GLOBAL_SCALEF * 0.2, GLOBAL_SCALEF * 0.2); + _cp1Item->setVisible(false); + + _cp2Item = new QGraphicsEllipseItem(this); + _cp2Item->setParentItem(this); + _cp2Item->setRect(GLOBAL_SCALEF * (-0.1), GLOBAL_SCALEF * (-0.1), + GLOBAL_SCALEF * 0.2, GLOBAL_SCALEF * 0.2); + _cp2Item->setVisible(false); + + readPos(); +} + +void EdgeItem::readPos() +{ + //_edge->setAttributesFromData(); + _edge->updateControls(); + QPainterPath path; + + path.moveTo (toScreen(_edge->tail())); + + if (_edge->bend() != 0 || !_edge->basicBendMode()) { + path.cubicTo(toScreen(_edge->cp1()), + toScreen(_edge->cp2()), + toScreen(_edge->head())); + } + else { + path.lineTo(toScreen(_edge->head())); + } + + setPath(path); + + _cp1Item->setPos(toScreen(_edge->cp1())); + _cp2Item->setPos(toScreen(_edge->cp2())); +} + +void EdgeItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *) +{ + //QGraphicsPathItem::paint(painter, option, widget); + QPen pen = _edge->style()->pen(); + painter->setPen(pen); + painter->setBrush(Qt::NoBrush); + painter->drawPath(path()); + + QPointF ht = _edge->headTangent(); + QPointF hLeft(-ht.y(), ht.x()); + QPointF hRight(ht.y(), -ht.x()); + QPointF tt = _edge->tailTangent(); + QPointF tLeft(-ht.y(), ht.x()); + QPointF tRight(ht.y(), -ht.x()); + + pen.setStyle(Qt::SolidLine); + painter->setPen(pen); + + + + switch (_edge->style()->arrowHead()) { + case Style::Flat: + { + painter->drawLine( + toScreen(_edge->head() + hLeft), + toScreen(_edge->head() + hRight)); + break; + } + case Style::Pointer: + { + QPainterPath pth; + pth.moveTo(toScreen(_edge->head() + ht + hLeft)); + pth.lineTo(toScreen(_edge->head())); + pth.lineTo(toScreen(_edge->head() + ht + hRight)); + painter->drawPath(pth); + break; + } + case Style::NoTip: + break; + } + + //QPen outline = QPen(Qt::red); + //painter->setPen(outline); + //painter->drawPath(_expPath); + //painter->setPen(pen); + + switch (_edge->style()->arrowTail()) { + case Style::Flat: + { + painter->drawLine( + toScreen(_edge->tail() + tLeft), + toScreen(_edge->tail() + tRight)); + break; + } + case Style::Pointer: + { + QPainterPath pth; + pth.moveTo(toScreen(_edge->tail() + tt + tLeft)); + pth.lineTo(toScreen(_edge->tail())); + pth.lineTo(toScreen(_edge->tail() + tt + tRight)); + painter->drawPath(pth); + break; + } + case Style::NoTip: + break; + } + + if (isSelected()) { + QColor draw; + QColor draw1; + QColor fill; + + if (_edge->basicBendMode()) { + draw = Qt::blue; + draw1 = QColor(100,100,255,100); + fill = QColor(200,200,255,50); + } else { + draw = Qt::darkGreen; + draw1 = QColor(0, 150, 0, 50); + fill = QColor(200,255,200,150); + } + + painter->setPen(QPen(draw1)); + + float r = GLOBAL_SCALEF * _edge->cpDist(); + painter->drawEllipse(toScreen(_edge->source()->point()), r, r); + painter->drawEllipse(toScreen(_edge->target()->point()), r, r); + + painter->setPen(QPen(draw)); + painter->setBrush(QBrush(fill)); + + painter->drawLine(toScreen(_edge->tail()), toScreen(_edge->cp1())); + painter->drawLine(toScreen(_edge->head()), toScreen(_edge->cp2())); + + //painter->drawEllipse(toScreen(_edge->cp1()), r, r); + //painter->drawEllipse(toScreen(_edge->cp2()), r, r); + + _cp1Item->setPen(QPen(draw)); + _cp1Item->setBrush(QBrush(fill)); + _cp1Item->setVisible(true); + + _cp2Item->setPen(QPen(draw)); + _cp2Item->setBrush(QBrush(fill)); + _cp2Item->setVisible(true); + + r = GLOBAL_SCALEF * 0.05; + painter->setPen(QPen(Qt::black)); + painter->setBrush(QBrush(QColor(255,255,255,200))); + painter->drawEllipse(toScreen(_edge->mid()), r, r); + } else { + _cp1Item->setVisible(false); + _cp2Item->setVisible(false); + } +} + +QRectF EdgeItem::boundingRect() const +{ + return _boundingRect; +} + +QPainterPath EdgeItem::shape() const +{ + return _expPath; +} + +Edge *EdgeItem::edge() const +{ + return _edge; +} + +QGraphicsEllipseItem *EdgeItem::cp1Item() const +{ + return _cp1Item; +} + +QGraphicsEllipseItem *EdgeItem::cp2Item() const +{ + return _cp2Item; +} + +QPainterPath EdgeItem::path() const +{ + return _path; +} + +void EdgeItem::setPath(const QPainterPath &path) +{ + prepareGeometryChange(); + + _path = path; + + // get the shape of the edge, and expand a bit to make selection easier + QPainterPathStroker stroker; + stroker.setWidth(8); + stroker.setJoinStyle(Qt::MiterJoin); + _expPath = stroker.createStroke(_path).simplified(); + + float r = GLOBAL_SCALEF * (_edge->cpDist() + 0.2); + _boundingRect = _path.boundingRect().adjusted(-r,-r,r,r); + + update(); +} + |