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 <QSize>
18 #include "Segment.h"
19 #include "SegmentFactory.h"
20 #include "Transformation.h"
21 
24 {
25 }
26 
27 DigitizeStateSegment::~DigitizeStateSegment ()
28 {
29 }
30 
32 {
34 }
35 
37  DigitizeState /* previousState */)
38 {
39  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::begin";
40 
41  m_cmdMediator = cmdMediator; // Save for slotMouseClickOnSegment
42 
43  setCursor(cmdMediator);
44  context().setDragMode(QGraphicsView::NoDrag);
46 
47  handleCurveChange(cmdMediator);
48 }
49 
50 bool DigitizeStateSegment::canPaste (const Transformation &transformation,
51  const QSize &viewSize) const
52 {
53  return canPasteProtected (transformation,
54  viewSize);
55 }
56 
57 QCursor DigitizeStateSegment::cursor(CmdMediator * /* cmdMediator */) const
58 {
59  LOG4CPP_DEBUG_S ((*mainCat)) << "DigitizeStateSegment::cursor";
60 
61  return QCursor (Qt::ArrowCursor);
62 }
63 
65 {
66  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::end";
67 
68  GraphicsScene &scene = context().mainWindow().scene();
69  SegmentFactory segmentFactory ((QGraphicsScene &) scene,
70  context().isGnuplot());
71 
72  segmentFactory.clearSegments(m_segments);
73 }
74 
76  const QString &pointIdentifier)
77 {
78  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleContextMenuEventAxis "
79  << " point=" << pointIdentifier.toLatin1 ().data ();
80 }
81 
83  const QStringList &pointIdentifiers)
84 {
85  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment ::handleContextMenuEventGraph "
86  << "points=" << pointIdentifiers.join(",").toLatin1 ().data ();
87 }
88 
90 {
91  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleCurveChange";
92 
93  QImage img = context().mainWindow().imageFiltered();
94 
95  GraphicsScene &scene = context().mainWindow().scene();
96  SegmentFactory segmentFactory ((QGraphicsScene &) scene,
97  context().isGnuplot());
98 
99  segmentFactory.clearSegments (m_segments);
100 
101  // Create new segments
102  segmentFactory.makeSegments (img,
103  cmdMediator->document().modelSegments(),
104  m_segments);
105 
106  // Connect signals of the new segments
107  QList<Segment*>::iterator itr;
108  for (itr = m_segments.begin(); itr != m_segments.end(); itr++) {
109  Segment *segment = *itr;
110 
111  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleCurveChange"
112  << " lines=" << segment->lineCount();
113 
114  connect (segment, SIGNAL (signalMouseClickOnSegment (QPointF)), this, SLOT (slotMouseClickOnSegment (QPointF)));
115  }
116 }
117 
119  Qt::Key key,
120  bool /* atLeastOneSelectedItem */)
121 {
122  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleKeyPress"
123  << " key=" << QKeySequence (key).toString ().toLatin1 ().data ();
124 }
125 
127  QPointF /* posScreen */)
128 {
129 // LOG4CPP_DEBUG_S ((*mainCat)) << "DigitizeStateSegment::handleMouseMove";
130 }
131 
133  QPointF /* posScreen */)
134 {
135  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleMousePress";
136 }
137 
139  QPointF /* posScreen */)
140 {
141  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::handleMouseRelease";
142 }
143 
144 Segment *DigitizeStateSegment::segmentFromSegmentStart (const QPointF &posSegmentStart) const
145 {
146  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::segmentFromSegmentStart"
147  << " segments=" << m_segments.count();
148 
149  QList<Segment*>::const_iterator itr;
150  for (itr = m_segments.begin(); itr != m_segments.end(); itr++) {
151  Segment *segment = *itr;
152 
153  if (segment->firstPoint() == posSegmentStart) {
154 
155  return segment;
156  }
157  }
158 
159  LOG4CPP_ERROR_S ((*mainCat)) << "DigitizeStateSegment::segmentFromSegmentStart";
160  ENGAUGE_ASSERT (false);
161  return 0;
162 }
163 
165 {
166  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::slotMouseClickOnSegment";
167 
168  Segment *segment = segmentFromSegmentStart (posSegmentStart);
169 
170  // Create single-entry list that is expected by SegmentFactory
171  QList<Segment*> segments;
172  segments.push_back (segment);
173 
174  // Generate point coordinates. Nothing is created in the GraphicsScene at this point
175  GraphicsScene &scene = context().mainWindow().scene();
176  SegmentFactory segmentFactory ((QGraphicsScene &) scene,
177  context().isGnuplot());
178 
179  QList<QPoint> points = segmentFactory.fillPoints (m_cmdMediator->document().modelSegments(),
180  segments);
181 
182  // Create one ordinal for each point
183  OrdinalGenerator ordinalGenerator;
184  Document &document = m_cmdMediator->document ();
185  const Transformation &transformation = context ().mainWindow ().transformation();
186  QList<double> ordinals;
187  QList<QPoint>::iterator itr;
188  for (itr = points.begin(); itr != points.end(); itr++) {
189 
190  QPoint point = *itr;
191  ordinals << ordinalGenerator.generateCurvePointOrdinal(document,
192  transformation,
193  point,
194  activeCurve ());
195  }
196 
197  // Create command to add points
198  QUndoCommand *cmd = new CmdAddPointsGraph (context ().mainWindow(),
199  document,
200  context ().mainWindow().selectedGraphCurve(),
201  points,
202  ordinals);
203  context().appendNewCmd(m_cmdMediator,
204  cmd);
205 }
206 
208 {
209  return "DigitizeStateSegment";
210 }
211 
213 {
214  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::updateAfterPointAddition";
215 }
216 
218  const DocumentModelDigitizeCurve & /*modelDigitizeCurve */)
219 {
220  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::updateModelDigitizeCurve";
221 }
222 
224 {
225  LOG4CPP_INFO_S ((*mainCat)) << "DigitizeStateSegment::updateModelSegments";
226 
227  QList<Segment*>::const_iterator itr;
228  for (itr = m_segments.begin(); itr != m_segments.end(); itr++) {
229  Segment *segment = *itr;
230 
231  segment->updateModelSegment (modelSegments);
232  }
233 }
virtual void updateAfterPointAddition()
Update graphics attributes after possible new points. This is useful for highlight opacity...
virtual QString state() const
State name for debugging.
Transformation transformation() const
Return read-only copy of transformation.
int lineCount() const
Get method for number of lines.
Definition: Segment.cpp:384
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.
QList< QPoint > fillPoints(const DocumentModelSegments &modelSegments, QList< Segment * > segments)
Return segment fill points for all segments, for previewing.
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...
QString selectedGraphCurve() const
Curve name that is currently selected in m_cmbCurve.
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
virtual bool canPaste(const Transformation &transformation, const QSize &viewSize) const
Return true if there is good data in the clipboard for pasting, and that is compatible with the curre...
void clearSegments(QList< Segment * > &segments)
Remove the segments created by makeSegments.
DigitizeStateContext & context()
Reference to the DigitizeStateContext that contains all the DigitizeStateAbstractBase subclasses...
MainWindow & mainWindow()
Reference to the MainWindow, without const.
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...
bool canPasteProtected(const Transformation &transformation, const QSize &viewSize) const
Protected version of canPaste method. Some, but not all, leaf classes use this method.
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 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...
Command for adding one or more graph points. This is for Segment Fill mode.
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.
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
QImage imageFiltered() const
Background image that has been filtered for the current curve. This asserts if a curve-specific image...
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.
Utility class for generating ordinal numbers.
Command queue stack.
Definition: CmdMediator.h:23
DocumentModelSegments modelSegments() const
Get method for DocumentModelSegments.
Definition: Document.cpp:745
void updateModelSegment(const DocumentModelSegments &modelSegments)
Update this segment given the new settings.
Definition: Segment.cpp:538
QPointF firstPoint() const
Coordinates of first point in Segment.
Definition: Segment.cpp:285
Model for DlgSettingsSegments and CmdSettingsSegments.
Base class for all digitizing states. This serves as an interface to DigitizeStateContext.
virtual QString activeCurve() const
Name of the active Curve. This can include AXIS_CURVE_NAME.
Add point and line handling to generic QGraphicsScene.
Definition: GraphicsScene.h:33
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.
virtual QCursor cursor(CmdMediator *cmdMediator) const
Returns the state-specific cursor shape.