Engauge Digitizer  2
SegmentLine.cpp
1 /******************************************************************************************************
2  * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released *
3  * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
4  * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission. *
5  ******************************************************************************************************/
6 
7 #include "DataKey.h"
8 #include "EnumsToQt.h"
9 #include "GraphicsItemType.h"
10 #include "Logger.h"
11 #include <QGraphicsScene>
12 #include <QPen>
13 #include "Segment.h"
14 #include "SegmentLine.h"
15 #include "ZValues.h"
16 
17 SegmentLine::SegmentLine(QGraphicsScene &scene,
18  const DocumentModelSegments &modelSegments,
19  Segment *segment) :
20  m_modelSegments (modelSegments),
21  m_segment (segment)
22 {
23  LOG4CPP_DEBUG_S ((*mainCat)) << "SegmentLine::SegmentLine"
24  << " address=0x" << std::hex << (quintptr) this;
25 
26  setData (DATA_KEY_GRAPHICS_ITEM_TYPE, QVariant (GRAPHICS_ITEM_TYPE_SEGMENT));
27 
28  // Make this transparent now, but always visible so hover events work
29  scene.addItem (this);
30  setPen (QPen (Qt::transparent));
31  setZValue (Z_VALUE_CURVE);
32  setVisible (true);
33  setAcceptHoverEvents (true);
34  setHover (false); // Initially the cursor is not hovering over this object. Later a hover event will change this state
35  setFlags (QGraphicsItem::ItemIsFocusable);
36 
37  connect (this, SIGNAL (signalHover (bool)), segment, SLOT (slotHover (bool)));
38 }
39 
40 SegmentLine::~SegmentLine ()
41 {
42  LOG4CPP_DEBUG_S ((*mainCat)) << "SegmentLine::~SegmentLine"
43  << " address=0x" << std::hex << (quintptr) this;
44 }
45 
46 void SegmentLine::hoverEnterEvent(QGraphicsSceneHoverEvent * /* event */)
47 {
48  LOG4CPP_INFO_S ((*mainCat)) << "SegmentLine::hoverEnterEvent";
49 
50  emit (signalHover (true));
51 }
52 
53 void SegmentLine::hoverLeaveEvent(QGraphicsSceneHoverEvent * /* event */)
54 {
55  LOG4CPP_INFO_S ((*mainCat)) << "SegmentLine::hoverLeaveEvent";
56 
57  emit (signalHover (false));
58 }
59 
60 void SegmentLine::mousePressEvent(QGraphicsSceneMouseEvent * /* event */)
61 {
62  LOG4CPP_INFO_S ((*mainCat)) << "SegmentLine::mousePressEvent";
63 
64  m_segment->forwardMousePress();
65 }
66 
68 {
69  return m_segment;
70 }
71 
72 void SegmentLine::setHover (bool hover)
73 {
74  if (hover) {
75 
76  QColor color (ColorPaletteToQColor (m_modelSegments.lineColor()));
77 
78  setPen (QPen (QBrush (color),
79  m_modelSegments.lineWidth()));
80 
81  } else {
82 
83  setPen (QPen (Qt::transparent));
84 
85  }
86 }
87 
89 {
90  LOG4CPP_INFO_S ((*mainCat)) << "SegmentLine::updateModelSegment";
91 
92  m_modelSegments = modelSegments;
93 }
SegmentLine(QGraphicsScene &scene, const DocumentModelSegments &modelSegments, Segment *segment)
Single constructor.
Definition: SegmentLine.cpp:17
void signalHover(bool)
Pass hover enter/leave events to Segment that owns this.
void updateModelSegment(const DocumentModelSegments &modelSegments)
Update this segment line with new settings.
Definition: SegmentLine.cpp:88
double lineWidth() const
Get method for line width.
virtual void hoverEnterEvent(QGraphicsSceneHoverEvent *event)
Highlight this and all other SegmentLines belonging to the same Segment upon hover enter...
Definition: SegmentLine.cpp:46
Segment * segment() const
Segment that owns this line.
Definition: SegmentLine.cpp:67
void forwardMousePress()
Forward mouse press event from a component SegmentLine that was just clicked on.
Definition: Segment.cpp:302
virtual void mousePressEvent(QGraphicsSceneMouseEvent *event)
Create points along this curve.
Definition: SegmentLine.cpp:60
Selectable piecewise-defined line that follows a filtered line in the image.
Definition: Segment.h:21
virtual void hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
Unset highlighting triggered by hover enter.
Definition: SegmentLine.cpp:53
ColorPalette lineColor() const
Get method for line color.
Model for DlgSettingsSegments and CmdSettingsSegments.
void setHover(bool hover)
Apply/remove highlighting triggered by hover enter/leave.
Definition: SegmentLine.cpp:72