Engauge Digitizer  2
TransformationStateContext.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 "CmdMediator.h"
8 #include "EngaugeAssert.h"
9 #include "Logger.h"
10 #include <QGraphicsScene>
11 #include <QImage>
12 #include "TransformationStateAbstractBase.h"
13 #include "TransformationStateContext.h"
14 #include "TransformationStateDefined.h"
15 #include "TransformationStateUndefined.h"
16 
18  bool isGnuplot) :
19  m_isGnuplot (isGnuplot)
20 {
21  m_states.insert (TRANSFORMATION_STATE_DEFINED , new TransformationStateDefined (*this, scene));
22  m_states.insert (TRANSFORMATION_STATE_UNDEFINED, new TransformationStateUndefined (*this, scene));
23  ENGAUGE_ASSERT (m_states.size () == NUM_TRANSFORMATION_STATES);
24 
25  m_currentState = NUM_TRANSFORMATION_STATES; // Value that forces a transition right away
26 }
27 
28 TransformationStateContext::~TransformationStateContext()
29 {
30 }
31 
33 {
34  return m_isGnuplot;
35 }
36 
38 {
39  LOG4CPP_INFO_S ((*mainCat)) << "TransformationStateContext::resetOnLoad";
40 
41  m_currentState = NUM_TRANSFORMATION_STATES;
42 }
43 
44 void TransformationStateContext::triggerStateTransition (TransformationState transformationState,
45  CmdMediator &cmdMediator,
46  const Transformation &transformation,
47  const QString &selectedGraphCurve)
48 {
49  LOG4CPP_INFO_S ((*mainCat)) << "TransformationStateContext::triggerStateTransition";
50 
51  // Transition even if we are already at the requested state (transformationState == m_currentState) to
52  // allow self-transitions. Those allow clean refreshing of the axis checker
53 
54  // End the current state if there is one
55  if (m_currentState != NUM_TRANSFORMATION_STATES) {
56  m_states[m_currentState]->end(cmdMediator,
57  transformation);
58  }
59 
60  m_currentState = transformationState;
61 
62  // Start the requested state
63  m_states[m_currentState]->begin(cmdMediator,
64  transformation,
65  selectedGraphCurve);
66 }
67 
69  const Transformation &transformation)
70 {
71  LOG4CPP_INFO_S ((*mainCat)) << "TransformationStateContext::updateAxesChecker";
72 
73  // Skip if there is no image so the state has not yet been set yet
74  if (m_currentState < NUM_TRANSFORMATION_STATES) {
75 
76  m_states[m_currentState]->updateAxesChecker (cmdMediator,
77  transformation);
78 
79  }
80 }
Class to show transformation since transformation is defined.
void triggerStateTransition(TransformationState transformationState, CmdMediator &cmdMediator, const Transformation &transformation, const QString &selectedGraphCurve)
Trigger a state transition to be performed immediately.
bool isGnuplot() const
Flag for gnuplot debug files.
Class to not show transformation since transformation is undefined.
Affine transformation between screen and graph coordinates, based on digitized axis points...
void resetOnLoad()
Reset, when loading a document after the first, to same state that first document was at when loaded...
Command queue stack.
Definition: CmdMediator.h:23
TransformationStateContext(QGraphicsScene &scene, bool isGnuplot)
Single constructor.
void updateAxesChecker(CmdMediator &cmdMediator, const Transformation &transformation)
Apply the new DocumentModelAxesChecker.