Engauge Digitizer  2
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CallbackDocumentHash.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 "CallbackDocumentHash.h"
8 #include "EngaugeAssert.h"
9 #include "Logger.h"
10 #include "Point.h"
11 #include <QCryptographicHash>
12 #include "QtToString.h"
13 #include "Transformation.h"
14 
15 CallbackDocumentHash::CallbackDocumentHash(DocumentAxesPointsRequired documentAxesPointsRequired) :
16  m_documentAxesPointsRequired (documentAxesPointsRequired),
17  m_documentHash (QCryptographicHash::Md5)
18 {
19 }
20 
21 CallbackDocumentHash::~CallbackDocumentHash()
22 {
23 }
24 
25 CallbackSearchReturn CallbackDocumentHash::callback (const QString &curveName,
26  const Point &point)
27 {
28  // LOG4CPP_DEBUG_S is below
29 
30  // Capture all important information about the point into the hash. A single string representing all of the point's details is
31  // created, which can be logged, and then that string is added to the hash
32 
33  QString details;
34 
35  details += curveName.toLatin1();
36  details += " " + point.identifier ();
37  details += " " + QPointFToString (point.posScreen());
38 
39  if (point.hasOrdinal ()) {
40  details += " " + QString::number (point.ordinal ());
41  }
42 
43  if (point.isAxisPoint()) {
44 
45  switch (m_documentAxesPointsRequired) {
46  case DOCUMENT_AXES_POINTS_REQUIRED_2:
47  // Axis point has same value for both coordinates so we chose one coordinate
48  details += " " + QString::number (point.posGraph().x());
49  break;
50 
51  case DOCUMENT_AXES_POINTS_REQUIRED_3:
52  // Axis point has two coordinates
53  details += " " + QPointFToString (point.posGraph());
54  break;
55 
56  case DOCUMENT_AXES_POINTS_REQUIRED_4:
57  // Axis point has one coordinate
58  if (point.isXOnly()) {
59 
60  details += " " + QString::number (point.posGraph().x());
61 
62  } else {
63 
64  details += " " + QString::number (point.posGraph().y());
65 
66  }
67  break;
68 
69  default:
70  ENGAUGE_ASSERT (false);
71  }
72  }
73 
74  LOG4CPP_DEBUG_S ((*mainCat)) << "CallbackDocumentHash::callback details=" << details.toLatin1().data();
75 
76  // Add details to hash
77  m_documentHash.addData (details.toLatin1());
78 
79  return CALLBACK_SEARCH_RETURN_CONTINUE;
80 }
81 
82 DocumentHash CallbackDocumentHash::hash () const
83 {
84  return m_documentHash.result ();
85 }
QPointF posGraph(ApplyHasCheck applyHasCheck=KEEP_HAS_CHECK) const
Accessor for graph position. Skip check if copying one instance to another.
Definition: Point.cpp:395
bool isAxisPoint() const
True if point is an axis point. This is used only for sanity checks.
Definition: Point.cpp:281
CallbackSearchReturn callback(const QString &curveName, const Point &point)
Callback method.
Class that represents one digitized point. The screen-to-graph coordinate transformation is always ex...
Definition: Point.h:25
QPointF posScreen() const
Accessor for screen position.
Definition: Point.cpp:404
QString identifier() const
Unique identifier for a specific Point.
Definition: Point.cpp:268
bool isXOnly() const
In DOCUMENT_AXES_POINTS_REQUIRED_4 modes, this is true/false if y/x coordinate is undefined...
Definition: Point.cpp:286
DocumentHash hash() const
Computed hash value.
CallbackDocumentHash(DocumentAxesPointsRequired documentAxesPointsRequired)
Single constructor.
bool hasOrdinal() const
True if ordinal is defined.
Definition: Point.cpp:258
double ordinal(ApplyHasCheck applyHasCheck=KEEP_HAS_CHECK) const
Get method for ordinal. Skip check if copying one instance to another.
Definition: Point.cpp:386