File indexing completed on 2024-05-19 04:36:34

 /* This file is part of the TikZKit project.
  *
  * Copyright (C) 2013 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 "AnchorHandle.h"
 #include "NodeItem.h"
 #include "DocumentPrivate.h"
 
 #include <QPointer>
 #include <QPainter>
 #include <QGraphicsScene>
 #include <QGraphicsView>
 #include <QStyle>
 #include <QStyleOptionGraphicsItem>
 #include <QEvent>
 #include <QGraphicsSceneMouseEvent>
 
 #include <QDebug>
 
 namespace tikz {
 namespace ui {
 
 AnchorHandle::AnchorHandle(NodeItem * node, const QString & anchor)
     : Handle(Handle::AnchorHandle)
     , m_metaPos(node->document())
     , m_node(node)
 {
     m_metaPos.setNode(node->node());
     m_metaPos.setAnchor(anchor);
 
     // set transform property correctly in case of NoAnchor type
     if (anchor.isEmpty()) {
         // no anchor means the tracked area spans the entire contents of the node,
         // therewith, view transformations must not be ignored
         setFlag(ItemIgnoresTransformations, false);
 
         // do not paint anything, since this Anchor represents the entire node
         setFlag(ItemHasNoContents, true);
 
         // track the rotation of the node
         // NOTE: right now, QGraphicsItem::scale() is not used, therewith we omit it here.
         setRotation(node->rotation());
     }
 
     // set position depending on the anchor
     setPos(node->anchor(anchor));
 }
 
 AnchorHandle::~AnchorHandle()
 {
 }
 
 int AnchorHandle::type() const
 {
     return UserType + 4;
 }
 
 NodeItem * AnchorHandle::node() const
 {
     return m_node;
 }
 
 QString AnchorHandle::anchor() const
 {
     return m_metaPos.anchor();
 }
 
 const tikz::core::MetaPos & AnchorHandle::metaPos() const
 {
     return m_metaPos;
 }
 
 void AnchorHandle::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
 {
     Q_UNUSED(widget);
     Q_UNUSED(option);
 
     // see 'ItemHasNoContents' in constructor
     Q_ASSERT(! anchor().isEmpty());
 
     painter->save();
     painter->setRenderHints(QPainter::Antialiasing);
 
     painter->setPen(QColor(164, 0, 0)); // dark red
     painter->setBrush(isHovered() ? Qt::yellow : QColor(221, 99, 99));
 
     if (!isActive()) {
         painter->setOpacity(0.5);
     }
 
     painter->drawEllipse(rect());
 
     painter->restore();
 }
 
 QRectF AnchorHandle::boundingRect() const
 {
     if (anchor().isEmpty()) {
         return m_node->boundingRect();
     } else {
         return Handle::boundingRect();
     }
 }
 
 bool AnchorHandle::contains(const QPointF &point) const
 {
     if (anchor().isEmpty()) {
         return m_node->contains(point);
     }
 
     return Handle::contains(point);
 }
 
 }
 }
 
 // kate: indent-width 4; replace-tabs on;