Engauge Digitizer  2
DigitizeStateSegment.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 "CmdAddPointsGraph.h"
8 #include "DigitizeStateContext.h"
9 #include "DigitizeStateSegment.h"
10 #include "EngaugeAssert.h"
11 #include "Logger.h"
12 #include "MainWindow.h"
13 #include "OrdinalGenerator.h"
14 #include <QGraphicsPixmapItem>
15 #include <QGraphicsScene>
16 #include <QImage>
17 #include "Segment.h"
18 #include "SegmentFactory.h"
19 
22 {
23 }
24 
25 DigitizeStateSegment::~DigitizeStateSegment ()
26 {
27 }
28 
30 {
32 }
33 
35  DigitizeState /* previousState */)
36 {
37  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::begin";
38 
39  m_cmdMediator = cmdMediator; // Save for slotMouseClickOnSegment
40 
41  setCursor(cmdMediator);
42  context().setDragMode(QGraphicsView::NoDrag);
44 
45  handleCurveChange(cmdMediator);
46 }
47 
48 QCursor DigitizeStateSegment::cursor(CmdMediator * /* cmdMediator */) const
49 {
50  LOG4CPP_DEBUG_S ((*mainCat)) << "DigitizeStateSegment::cursor";
51 
52  return QCursor (Qt::ArrowCursor);
53 }
54 
56 {
57  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::end";
58 
59  GraphicsScene &scene = context().mainWindow().scene();
60  SegmentFactory segmentFactory ((QGraphicsScene &) scene,
61  context().isGnuplot());
62 
63  segmentFactory.clearSegments(m_segments);
64 }
65 
67  const QString &pointIdentifier)
68 {
69  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleContextMenuEventAxis "
70  << " point=" << pointIdentifier.toLatin1 ().data ();
71 }
72 
74  const QStringList &pointIdentifiers)
75 {
76  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment ::handleContextMenuEventGraph "
77  << "points=" << pointIdentifiers.join(",").toLatin1 ().data ();
78 }
79 
81 {
82  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleCurveChange";
83 
84  QImage img = context().mainWindow().imageFiltered();
85 
86  GraphicsScene &scene = context().mainWindow().scene();
87  SegmentFactory segmentFactory ((QGraphicsScene &) scene,
88  context().isGnuplot());
89 
90  segmentFactory.clearSegments (m_segments);
91 
92  // Create new segments
93  segmentFactory.makeSegments (img,
94  cmdMediator->document().modelSegments(),
95  m_segments);
96 
97  // Connect signals of the new segments
98  QList<Segment*>::iterator itr;
99  for (itr = m_segments.begin(); itr != m_segments.end(); itr++) {
100  Segment *segment = *itr;
101 
102  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleCurveChange"
103  << " lines=" << segment->lineCount();
104 
105  connect (segment, SIGNAL (signalMouseClickOnSegment (QPointF)), this, SLOT (slotMouseClickOnSegment (QPointF)));
106  }
107 }
108 
110  Qt::Key key,
111  bool /* atLeastOneSelectedItem */)
112 {
113  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleKeyPress"
114  << " key=" << QKeySequence (key).toString ().toLatin1 ().data ();
115 }
116 
118  QPointF /* posScreen */)
119 {
120 // LOG4CPP_DEBUG_S ((*mainCat)) << "DigitizeStateSegment::handleMouseMove";
121 }
122 
124  QPointF /* posScreen */)
125 {
126  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleMousePress";
127 }
128 
130  QPointF /* posScreen */)
131 {
132  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleMouseRelease";
133 }
134 
135 Segment *DigitizeStateSegment::segmentFromSegmentStart (const QPointF &posSegmentStart) const
136 {
137  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::segmentFromSegmentStart"
138  << " segments=" << m_segments.count();
139 
140  QList<Segment*>::const_iterator itr;
141  for (itr = m_segments.begin(); itr != m_segments.end(); itr++) {
142  Segment *segment = *itr;
143 
144  if (segment->firstPoint() == posSegmentStart) {
145 
146  return segment;
147  }
148  }
149 
150  LOG4CPP_ERROR_S ((*mainCat)) << "DigitizeStateSegment::segmentFromSegmentStart";
151  ENGAUGE_ASSERT (false);
152  return 0;
153 }
154 
156 {
157  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::slotMouseClickOnSegment";
158 
159  Segment *segment = segmentFromSegmentStart (posSegmentStart);
160 
161  // Create single-entry list that is expected by SegmentFactory
162  QList<Segment*> segments;
163  segments.push_back (segment);
164 
165  // Generate point coordinates. Nothing is created in the GraphicsScene at this point
166  GraphicsScene &scene = context().mainWindow().scene();
167  SegmentFactory segmentFactory ((QGraphicsScene &) scene,
168  context().isGnuplot());
169 
170  QList<QPoint> points = segmentFactory.fillPoints (m_cmdMediator->document().modelSegments(),
171  segments);
172 
173  // Create one ordinal for each point
174  OrdinalGenerator ordinalGenerator;
175  Document &document = m_cmdMediator->document ();
176  const Transformation &transformation = context ().mainWindow ().transformation();
177  QList<double> ordinals;
178  QList<QPoint>::iterator itr;
179  for (itr = points.begin(); itr != points.end(); itr++) {
180 
181  QPoint point = *itr;
182  ordinals << ordinalGenerator.generateCurvePointOrdinal(document,
183  transformation,
184  point,
185  activeCurve ());
186  }
187 
188  // Create command to add points
189  QUndoCommand *cmd = new CmdAddPointsGraph (context ().mainWindow(),
190  document,
191  context ().mainWindow().selectedGraphCurve(),
192  points,
193  ordinals);
194  context().appendNewCmd(m_cmdMediator,
195  cmd);
196 }
197 
199 {
200  return "DigitizeStateSegment";
201 }
202 
204 {
205  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::updateAfterPointAddition";
206 }
207 
209  const DocumentModelDigitizeCurve & /*modelDigitizeCurve */)
210 {
211  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::updateModelDigitizeCurve";
212 }
213 
215 {
216  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::updateModelSegments";
217 
218  QList<Segment*>::const_iterator itr;
219  for (itr = m_segments.begin(); itr != m_segments.end(); itr++) {
220  Segment *segment = *itr;
221 
222  segment->updateModelSegment (modelSegments);
223  }
224 }
QImage imageFiltered() const
Background image that has been filtered for the current curve. This asserts if a curve-specific image...
virtual void updateAfterPointAddition()
Update graphics attributes after possible new points. This is useful for highlight opacity...
void setDragMode(QGraphicsView::DragMode dragMode)
Set QGraphicsView drag mode (in m_view). Called from DigitizeStateAbstractBase subclasses.
virtual void handleMousePress(CmdMediator *cmdMediator, QPointF posScreen)
Handle a mouse press that was intercepted earlier.
virtual void updateModelSegments(const DocumentModelSegments &modelSegments)
Update the segments given the new settings.
virtual void handleContextMenuEventAxis(CmdMediator *cmdMediator, const QString &pointIdentifier)
Handle a right click, on an axis point, that was intercepted earlier.
void updateViewsOfSettings(const QString &activeCurve)
Update curve-specific view of settings. Private version gets active curve name from DigitizeStateCont...
virtual QCursor cursor(CmdMediator *cmdMediator) const
Returns the state-specific cursor shape.
virtual void handleMouseMove(CmdMediator *cmdMediator, QPointF posScreen)
Handle a mouse move. This is part of an experiment to see if augmenting the cursor in Point Match mod...
virtual void updateModelDigitizeCurve(CmdMediator *cmdMediator, const DocumentModelDigitizeCurve &modelDigitizeCurve)
Update the digitize curve settings.
Document & document()
Provide the Document to commands, primarily for undo/redo processing.
Definition: CmdMediator.cpp:72
QList< QPoint > fillPoints(const DocumentModelSegments &modelSegments, QList< Segment *> segments)
Return segment fill points for all segments, for previewing.
virtual QString activeCurve() const
Name of the active Curve. This can include AXIS_CURVE_NAME.
DigitizeStateContext & context()
Reference to the DigitizeStateContext that contains all the DigitizeStateAbstractBase subclasses...
void makeSegments(const QImage &imageFiltered, const DocumentModelSegments &modelSegments, QList< Segment *> &segments, bool useDlg=true)
Main entry point for creating all Segments for the filtered image.
MainWindow & mainWindow()
Reference to the MainWindow, without const.
Transformation transformation() const
Return read-only copy of transformation.
Factory class for Segment objects.
virtual void handleCurveChange(CmdMediator *cmdMediator)
Handle the selection of a new curve. At a minimum, DigitizeStateSegment will generate a new set of Se...
Model for DlgSettingsDigitizeCurve and CmdSettingsDigitizeCurve.
Affine transformation between screen and graph coordinates, based on digitized axis points...
GraphicsScene & scene()
Scene container for the QImage and QGraphicsItems.
void clearSegments(QList< Segment *> &segments)
Remove the segments created by makeSegments.
void setCursor(CmdMediator *cmdMediator)
Update the cursor according to the current state.
Container for all DigitizeStateAbstractBase subclasses. This functions as the context class in a stan...
void appendNewCmd(CmdMediator *cmdMediator, QUndoCommand *cmd)
Append just-created QUndoCommand to command stack. This is called from DigitizeStateAbstractBase subc...
virtual void end()
Method that is called at the exact moment a state is exited. Typically called just before begin for t...
DocumentModelSegments modelSegments() const
Get method for DocumentModelSegments.
Definition: Document.cpp:721
Command for adding one or more graph points. This is for Segment Fill mode.
Storage of one imported image and the data attached to that image.
Definition: Document.h:41
Selectable piecewise-defined line that follows a filtered line in the image.
Definition: Segment.h:21
void slotMouseClickOnSegment(QPointF)
Receive signal from Segment that has been clicked on. The CmdMediator from the begin method will be u...
virtual void begin(CmdMediator *cmdMediator, DigitizeState previousState)
Method that is called at the exact moment a state is entered.
virtual void handleContextMenuEventGraph(CmdMediator *cmdMediator, const QStringList &pointIdentifiers)
Handle a right click, on a graph point, that was intercepted earlier.
virtual QString state() const
State name for debugging.
Utility class for generating ordinal numbers.
Command queue stack.
Definition: CmdMediator.h:23
void updateModelSegment(const DocumentModelSegments &modelSegments)
Update this segment given the new settings.
Definition: Segment.cpp:538
int lineCount() const
Get method for number of lines.
Definition: Segment.cpp:384
Model for DlgSettingsSegments and CmdSettingsSegments.
QPointF firstPoint() const
Coordinates of first point in Segment.
Definition: Segment.cpp:285
Base class for all digitizing states. This serves as an interface to DigitizeStateContext.
Add point and line handling to generic QGraphicsScene.
Definition: GraphicsScene.h:32
QString selectedGraphCurve() const
Curve name that is currently selected in m_cmbCurve.
DigitizeStateSegment(DigitizeStateContext &context)
Single constructor.
double generateCurvePointOrdinal(const Document &document, const Transformation &transformation, const QPointF &posScreen, const QString &curveName)
Select ordinal so new point curve passes smoothly through existing points.
virtual void handleMouseRelease(CmdMediator *cmdMediator, QPointF posScreen)
Handle a mouse release that was intercepted earlier.
virtual void handleKeyPress(CmdMediator *cmdMediator, Qt::Key key, bool atLeastOneSelectedItem)
Handle a key press that was intercepted earlier.