text: /****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of Qt Creator.
  **
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU
  ** General Public License version 3 as published by the Free Software
  ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
  ** included in the packaging of this file. Please review the following
  ** information to ensure the GNU General Public License requirements will
  ** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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  ****************************************************************************/
  
  #include "cornergrabberitem.h"
  
  #include <QCursor>
  #include <QGraphicsSceneMouseEvent>
  #include <QPainter>
  
  using namespace ScxmlEditor::PluginInterface;
  
  CornerGrabberItem::CornerGrabberItem(QGraphicsItem *parent, Qt::CursorShape cshape)
      : QGraphicsObject(parent)
      , m_cursorShape(cshape)
  {
      setFlag(ItemIgnoresTransformations, true);
      setParentItem(parent);
      installSceneEventFilter(parent);
      setZValue(500);
      m_rect = QRectF(-5, -5, 10, 10);
      m_drawingRect = m_rect.adjusted(2, 2, -2, -2);
  
      setAcceptHoverEvents(true);
  }
  
  void CornerGrabberItem::updateCursor()
  {
      setCursor(m_selected ? m_cursorShape : Qt::ArrowCursor);
  }
  
  void CornerGrabberItem::setSelected(bool para)
  {
      m_selected = para;
      updateCursor();
      update();
  }
  
  void CornerGrabberItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *e)
  {
      Q_UNUSED(e)
      setSelected(false);
  }
  
  void CornerGrabberItem::hoverEnterEvent(QGraphicsSceneHoverEvent *e)
  {
      Q_UNUSED(e)
      setSelected(true);
  }
  
  void CornerGrabberItem::mousePressEvent(QGraphicsSceneMouseEvent *e)
  {
      m_pressPoint = e->pos();
  }
  
  void CornerGrabberItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
  {
      Q_UNUSED(option)
      Q_UNUSED(widget)
  
      painter->save();
      painter->setRenderHint(QPainter::Antialiasing, true);
      painter->setPen(Qt::NoPen);
      painter->setBrush(isEnabled() ? QColor(0x62, 0x62, 0xf9) : QColor(0x12, 0x12, 0x12));
  
      if (m_grabberType == Square)
          painter->drawRect(m_drawingRect);
      else
          painter->drawEllipse(m_drawingRect);
  
      painter->restore();
  }
  