Warning, file /graphics/tikzkit/src/ui/paths/EllipsePathItem.cpp was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /* This file is part of the TikZKit project.
  *
  * Copyright (C) 2013-2014 Dominik Haumann <dhaumann@kde.org>
  *
  * This library is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Library General Public License as published
  * by the Free Software Foundation, either version 2 of the License, or
  * (at your option) any later version.
  *
  * This library 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 Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, see
  * <http://www.gnu.org/licenses/>.
  */
 
 #include "EllipsePathItem.h"
 
 #include "NodeItem.h"
 #include "DocumentPrivate.h"
 #include "ResizeHandle.h"
 #include "MoveHandle.h"
 #include "RotateHandle.h"
 #include "Painter.h"
 
 #include <tikz/core/EllipsePath.h>
 #include <tikz/core/Style.h>
 
 #include <QApplication>
 #include <QPainter>
 #include <QGraphicsScene>
 #include <QGraphicsView>
 #include <QDebug>
 #include <QGraphicsSceneMouseEvent>
 #include <QPainterPathStroker>
 
 namespace tikz {
 namespace ui {
 
 EllipsePathItem::EllipsePathItem(tikz::core::Path * path)
     : tikz::ui::PathItem(path)
 {
     // catch if the tikz::core::Node::pos() changes behind our back:
     // we need to track the NodeItem the ellipse is attached to
     connect(path, SIGNAL(nodeChanged(tikz::core::Node*)),
             this, SLOT(updateNode(tikz::core::Node*)));
 
     connect(path, SIGNAL(changed()), this, SLOT(slotUpdate()));
 }
 
 EllipsePathItem::~EllipsePathItem()
 {
 }
 
 DocumentPrivate * EllipsePathItem::document() const
 {
     Q_ASSERT(qobject_cast<DocumentPrivate*>(path()->document()) != nullptr);
     return qobject_cast<DocumentPrivate*>(path()->document());
 }
 
 void EllipsePathItem::setNode(NodeItem* node)
 {
     if (m_node != node) {
         ellipsePath()->setNode(node ? node->node() : nullptr);
     }
 }
 
 NodeItem* EllipsePathItem::node() const
 {
     return m_node;
 }
 
 QPointF EllipsePathItem::pos() const
 {
     if (ellipsePath()->node()) {
         NodeItem * nodeItem = document()->nodeItemFromId(ellipsePath()->node()->uid());
         Q_ASSERT(nodeItem != nullptr);
 
         return nodeItem->anchor(anchor());
     } else {
         return ellipsePath()->pos();
     }
 }
 
 QString EllipsePathItem::anchor() const
 {
     return ellipsePath()->anchor();
 }
 
 void EllipsePathItem::setAnchor(const QString & anchor)
 {
     ellipsePath()->setAnchor(anchor);
 }
 
 void EllipsePathItem::slotUpdate()
 {
     prepareGeometryChange();
 
     m_dirty = true;
     setTransformOriginPoint(pos());
     setRotation(style()->rotation());
 }
 
 void EllipsePathItem::paint(QPainter *painter,
                             const QStyleOptionGraphicsItem *option,
                             QWidget *widget)
 {
     Q_UNUSED(option);
     Q_UNUSED(widget);
 
     updateCache();
 
     painter->setRenderHints(QPainter::Antialiasing);
 
     if (isHovered() /*&& !dragging*/) {
         painter->fillPath(m_hoverPath, QColor(148, 202, 239)); // FIXME: make color configurable
     }
 
     // draw line
     Painter p(painter, style());
     p.drawPath(m_ellipse);
 }
 
 QRectF EllipsePathItem::boundingRect() const
 {
     // make sure the cache is up-to-date
     const_cast<EllipsePathItem*>(this)->updateCache();
 
     return m_boundingRect; //.adjusted(-0.05, -0.05, 0.05, 0.05);
 }
 
 QPainterPath EllipsePathItem::shape() const
 {
     const_cast<EllipsePathItem*>(this)->updateCache();
 
     return m_shapePath;
 }
 
 bool EllipsePathItem::contains(const QPointF & point) const
 {
     // make sure the cache is up-to-date
     const_cast<EllipsePathItem*>(this)->updateCache();
 
     // contains depends on the type of fill color/brush
     if (style()->fillColor() == Qt::transparent) {
         return m_hoverPath.contains(point);
     } else {
         return m_ellipse.contains(point)
             || m_hoverPath.contains(point);
     }
 }
 
 void EllipsePathItem::updateNode(tikz::core::Node * node)
 {
     NodeItem * newNode = nullptr;
 
     if (node) {
         newNode = document()->nodeItemFromId(node->uid());
     }
 
     if (m_node != newNode) {
         prepareGeometryChange();
         m_dirty = true;
         m_node = newNode;
     }
 }
 
 void EllipsePathItem::updateCache()
 {
     if (!m_dirty) return;
     m_dirty = false;
 
     // reset old paths
     m_ellipse = QPainterPath();
     m_hoverPath = QPainterPath();
     m_boundingRect = QRectF();
 
     // draw ellipse path
     m_ellipse.addEllipse(pos(),
                          style()->radiusX().toPoint(),
                          style()->radiusY().toPoint());
 
     // cache hover path
     QPainterPathStroker pps;
     pps.setWidth(style()->penWidth().toPoint() + 1.0_mm .toPoint());
     m_hoverPath = pps.createStroke(m_ellipse);
 
     // cache shape path
     pps.setWidth(style()->penWidth().toPoint() + 2.0_mm .toPoint());
     m_shapePath = pps.createStroke(m_ellipse);
 
     // cache bounding rect
     m_boundingRect = m_shapePath.boundingRect();
 }
 
 tikz::core::EllipsePath * EllipsePathItem::ellipsePath() const
 {
     tikz::core::EllipsePath * p = qobject_cast<tikz::core::EllipsePath*>(path());
     Q_ASSERT(p != nullptr);
 
     return p;
 }
 
 }
 }
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