SegmentLine.cpp

/******************************************************************************************************
 * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released      *
 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission.     *
 ******************************************************************************************************/
 
#include "DataKey.h"
#include "EnumsToQt.h"
#include "GraphicsItemType.h"
#include "Logger.h"
#include <QGraphicsScene>
#include <QPen>
#include "Segment.h"
#include "SegmentLine.h"
 
const double ZVALUE_SEGMENT = 50; // Less than z value for GraphicsPoint
 
SegmentLine::SegmentLine(QGraphicsScene  &scene,
                         const DocumentModelSegments &modelSegments,
                         Segment *segment) :
  m_modelSegments (modelSegments),
  m_segment (segment)
{
  LOG4CPP_DEBUG_S ((*mainCat)) << "SegmentLine::SegmentLine"
                               << " address=0x" << std::hex << (quintptr) this;
 
  setData (DATA_KEY_GRAPHICS_ITEM_TYPE, QVariant (GRAPHICS_ITEM_TYPE_SEGMENT));
 
  // Make this transparent now, but always visible so hover events work
  scene.addItem (this);
  setPen (QPen (Qt::transparent));
  setZValue (ZVALUE_SEGMENT);
  setVisible (true);
  setAcceptHoverEvents (true);
  setHover (false); // Initially the cursor is not hovering over this object. Later a hover event will change this state
  setFlags (QGraphicsItem::ItemIsFocusable);
 
  connect (this, SIGNAL (signalHover (bool)), segment, SLOT (slotHover (bool)));
}
 
SegmentLine::~SegmentLine ()
{
  LOG4CPP_DEBUG_S ((*mainCat)) << "SegmentLine::~SegmentLine"
                               << " address=0x" << std::hex << (quintptr) this;
}
 
void SegmentLine::hoverEnterEvent(QGraphicsSceneHoverEvent * /* event */)
{
  LOG4CPP_INFO_S ((*mainCat)) << "SegmentLine::hoverEnterEvent";
 
  emit (signalHover (true));
}
 
void SegmentLine::hoverLeaveEvent(QGraphicsSceneHoverEvent * /* event */)
{
  LOG4CPP_INFO_S ((*mainCat)) << "SegmentLine::hoverLeaveEvent";
 
  emit (signalHover (false));
}
 
void SegmentLine::mousePressEvent(QGraphicsSceneMouseEvent * /* event */)
{
  LOG4CPP_INFO_S ((*mainCat)) << "SegmentLine::mousePressEvent";
 
  m_segment->forwardMousePress();
}
 
Segment *SegmentLine::segment() const
{
  return m_segment;
}
 
void SegmentLine::setHover (bool hover)
{
  if (hover) {
 
    QColor color (ColorPaletteToQColor (m_modelSegments.lineColor()));
 
    setPen (QPen (QBrush (color),
                  m_modelSegments.lineWidth()));
 
  } else {
 
    setPen (QPen (Qt::transparent));
 
  }
}
 
void SegmentLine::updateModelSegment(const DocumentModelSegments &modelSegments)
{
  LOG4CPP_INFO_S ((*mainCat)) << "SegmentLine::updateModelSegment";
 
  m_modelSegments = modelSegments;
}