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Diffstat (limited to 'src/gui/nodeitem.cpp')
| -rw-r--r-- | src/gui/nodeitem.cpp | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/gui/nodeitem.cpp b/src/gui/nodeitem.cpp new file mode 100644 index 0000000..18ff43c --- /dev/null +++ b/src/gui/nodeitem.cpp @@ -0,0 +1,164 @@ +/* + 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 "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(); + updateBounds(); +} + +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 << 1.0 << 2.0; + pen.setDashPattern(p); + pen.setWidthF(2.0f); + 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; + + if (_node->style()->shape() == "rectangle") { + path.addRect(-0.2 * GLOBAL_SCALEF, -0.2 * GLOBAL_SCALEF, 0.4 * GLOBAL_SCALEF, 0.4 * GLOBAL_SCALEF); + } else { + path.addEllipse(QPointF(0, 0), GLOBAL_SCALEF * 0.2, GLOBAL_SCALEF * 0.2); + } + return path; +} + +// TODO: nodeitem should sync boundingRect()-relevant stuff (label etc) explicitly, +// to allow prepareGeometryChange() +QRectF NodeItem::boundingRect() const +{ + return _boundingRect; +} + +void NodeItem::updateBounds() +{ + prepareGeometryChange(); + QString label = _node->label(); + if (label != "") { + QFontMetrics fm(Tikzit::LABEL_FONT); + QRectF labelRect = fm.boundingRect(label); + labelRect.moveCenter(QPointF(0, 0)); + _boundingRect = labelRect.united(shape().boundingRect()).adjusted(-4, -4, 4, 4); + } else { + _boundingRect = 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); +// } +//} |