Engauge Digitizer  2
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DlgSettingsDigitizeCurve.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 "CmdSettingsDigitizeCurve.h"
9 #include "CursorFactory.h"
10 #include "CursorSize.h"
11 #include "DlgSettingsDigitizeCurve.h"
12 #include "DocumentModelDigitizeCurve.h"
13 #include "EngaugeAssert.h"
14 #include "Logger.h"
15 #include "MainWindow.h"
16 #include "PointStyle.h"
17 #include <QCheckBox>
18 #include <QComboBox>
19 #include <QGraphicsPixmapItem>
20 #include <QGridLayout>
21 #include <QGraphicsScene>
22 #include <QGroupBox>
23 #include <QLabel>
24 #include <qmath.h>
25 #include <QRadioButton>
26 #include <QSpinBox>
27 #include "Segment.h"
28 #include "SegmentFactory.h"
29 #include "ViewPreview.h"
30 
31 const int IMAGE_WIDTH = 100;
32 const int IMAGE_HEIGHT = 100;
33 
34 const int INNER_RADIUS_MAX = 64;
35 const int INNER_RADIUS_MIN = 0;
36 const int LINE_LENGTH_MIN = 2; // Min length of one line in the cursor, in pixels
37 const int LINE_WIDTH_MAX = 32;
38 const int LINE_WIDTH_MIN = 1;
39 
41  DlgSettingsAbstractBase (tr ("Digitize Curve"),
42  "DlgSettingsDigitizeCurve",
43  mainWindow),
44  m_scenePreview (0),
45  m_viewPreview (0),
46  m_modelDigitizeCurveBefore (0),
47  m_modelDigitizeCurveAfter (0)
48 {
49  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::DlgSettingsDigitizeCurve";
50 
51  QWidget *subPanel = createSubPanel ();
52  finishPanel (subPanel);
53 }
54 
55 DlgSettingsDigitizeCurve::~DlgSettingsDigitizeCurve()
56 {
57  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::~DlgSettingsDigitizeCurve";
58 }
59 
60 void DlgSettingsDigitizeCurve::createControls (QGridLayout *layout,
61  int &row)
62 {
63  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::createControls";
64 
65  m_boxCursor = new QGroupBox (tr ("Cursor"));
66  layout->addWidget (m_boxCursor, row++, 1, 1, 2);
67 
68  // Layout inside cursor group box
69  QGridLayout *layoutCursor = new QGridLayout;
70  m_boxCursor->setLayout (layoutCursor);
71  int rowCursor = 0;
72 
73  QLabel *labelCursorType = new QLabel(tr ("Type:"));
74  layoutCursor->addWidget (labelCursorType, rowCursor, 0);
75 
76  m_btnStandard = new QRadioButton (tr ("Standard cross"));
77  m_btnStandard->setWhatsThis (tr ("Selects the standard cross cursor"));
78  layoutCursor->addWidget (m_btnStandard, rowCursor++, 1);
79  connect (m_btnStandard, SIGNAL (toggled (bool)), this, SLOT (slotCursorStandard(bool)));
80 
81  m_btnCustom = new QRadioButton (tr ("Custom cross"));
82  m_btnCustom->setWhatsThis (tr ("Selects a custom cursor based on the settings selected below"));
83  layoutCursor->addWidget (m_btnCustom, rowCursor++, 1);
84  connect (m_btnCustom, SIGNAL (toggled (bool)), this, SLOT (slotCursorCustom(bool)));
85 
86  QLabel *labelSize = new QLabel(tr ("Size (pixels):"));
87  layoutCursor->addWidget (labelSize, rowCursor, 0);
88 
89  m_cmbSize = new QComboBox;
90  m_cmbSize->addItem (QString::number (CursorSizeToPixels (CURSOR_SIZE_16)), QVariant (CURSOR_SIZE_16));
91  m_cmbSize->addItem (QString::number (CursorSizeToPixels (CURSOR_SIZE_32)), QVariant (CURSOR_SIZE_32));
92  m_cmbSize->addItem (QString::number (CursorSizeToPixels (CURSOR_SIZE_48)), QVariant (CURSOR_SIZE_48));
93  m_cmbSize->addItem (QString::number (CursorSizeToPixels (CURSOR_SIZE_64)), QVariant (CURSOR_SIZE_64));
94  ENGAUGE_ASSERT (m_cmbSize->count() == NUM_CURSOR_SIZES);
95  m_cmbSize->setWhatsThis (tr ("Horizontal and vertical size of the cursor in pixels"));
96  layoutCursor->addWidget (m_cmbSize, rowCursor++, 1);
97  connect (m_cmbSize, SIGNAL (currentIndexChanged (const QString &)), this, SLOT (slotCursorSize (const QString &)));
98 
99  QLabel *labelInnerRadius = new QLabel(tr ("Inner radius (pixels):"));
100  layoutCursor->addWidget (labelInnerRadius, rowCursor, 0);
101 
102  m_spinInnerRadius = new QSpinBox;
103  m_spinInnerRadius->setRange (INNER_RADIUS_MIN, INNER_RADIUS_MAX);
104  m_spinInnerRadius->setWhatsThis (tr ("Radius of circle at the center of the cursor that will remain empty"));
105  layoutCursor->addWidget (m_spinInnerRadius, rowCursor++, 1);
106  connect (m_spinInnerRadius, SIGNAL (valueChanged(const QString &)), this, SLOT (slotCursorInnerRadius (const QString &)));
107 
108  QLabel *labelLineWidth = new QLabel(tr ("Line width (pixels):"));
109  layoutCursor->addWidget (labelLineWidth, rowCursor, 0);
110 
111  m_spinLineWidth = new QSpinBox;
112  m_spinLineWidth->setRange (LINE_WIDTH_MIN, LINE_WIDTH_MAX);
113  m_spinLineWidth->setWhatsThis (tr ("Width of each arm of the cross of the cursor"));
114  layoutCursor->addWidget (m_spinLineWidth, rowCursor++, 1);
115  connect (m_spinLineWidth, SIGNAL (valueChanged(const QString &)), this, SLOT (slotCursorLineWidth (const QString &)));
116 }
117 
119 {
120 }
121 
122 void DlgSettingsDigitizeCurve::createPreview (QGridLayout *layout,
123  int &row)
124 {
125  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::createPreview";
126 
127  QLabel *labelPreview = new QLabel (tr ("Preview"));
128  layout->addWidget (labelPreview, row++, 0, 1, 4);
129 
130  m_scenePreview = new QGraphicsScene (this);
131  m_scenePreview->setSceneRect(0,
132  0,
133  IMAGE_WIDTH,
134  IMAGE_HEIGHT);
135 
136  m_viewPreview = new ViewPreview (m_scenePreview,
137  ViewPreview::VIEW_ASPECT_RATIO_VARIABLE,
138  this);
139  m_viewPreview->setWhatsThis (tr ("Preview window showing the currently selected cursor.\n\n"
140  "Drag the cursor over this area to see the effects of the current settings on the cursor shape."));
141  m_viewPreview->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
142  m_viewPreview->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
143  m_viewPreview->setMinimumHeight (MINIMUM_PREVIEW_HEIGHT);
144 
145  layout->addWidget (m_viewPreview, row++, 0, 1, 4);
146 }
147 
149 {
150  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::createSubPanel";
151 
152  QWidget *subPanel = new QWidget ();
153  QGridLayout *layout = new QGridLayout (subPanel);
154  subPanel->setLayout (layout);
155 
156  layout->setColumnStretch (0, 1); // Empty first column
157  layout->setColumnStretch (1, 0); // Labels
158  layout->setColumnStretch (2, 0); // User controls
159  layout->setColumnStretch (3, 1); // Empty last column
160 
161  int row = 0;
162  createControls(layout, row);
163  createPreview (layout, row);
164 
165  return subPanel;
166 }
167 
169 {
170  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::handleOk";
171 
173  cmdMediator ().document(),
174  *m_modelDigitizeCurveBefore,
175  *m_modelDigitizeCurveAfter);
176  cmdMediator ().push (cmd);
177 
178  hide ();
179 }
180 
182 {
183  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::load";
184 
185  setCmdMediator (cmdMediator);
186 
187  // Flush old data
188  if (m_modelDigitizeCurveBefore != 0) {
189  delete m_modelDigitizeCurveBefore;
190  }
191  if (m_modelDigitizeCurveAfter != 0) {
192  delete m_modelDigitizeCurveAfter;
193  }
194 
195  // Save new data
196  m_modelDigitizeCurveBefore = new DocumentModelDigitizeCurve (cmdMediator.document());
197  m_modelDigitizeCurveAfter = new DocumentModelDigitizeCurve (cmdMediator.document());
198 
199  // Sanity checks. Incoming defaults must be acceptable to the local limits
200  ENGAUGE_ASSERT (INNER_RADIUS_MIN <= m_modelDigitizeCurveAfter->cursorInnerRadius ());
201  ENGAUGE_ASSERT (INNER_RADIUS_MAX >= m_modelDigitizeCurveAfter->cursorInnerRadius ());
202  ENGAUGE_ASSERT (LINE_WIDTH_MIN <= m_modelDigitizeCurveAfter->cursorLineWidth ());
203  ENGAUGE_ASSERT (LINE_WIDTH_MAX >= m_modelDigitizeCurveAfter->cursorLineWidth ());
204 
205  // Populate controls
206  m_btnStandard->setChecked (m_modelDigitizeCurveAfter->cursorStandardCross());
207  m_btnCustom->setChecked (!m_modelDigitizeCurveAfter->cursorStandardCross());
208  m_spinInnerRadius->setValue (m_modelDigitizeCurveAfter->cursorInnerRadius());
209  int index = m_cmbSize->findData (QVariant (m_modelDigitizeCurveAfter->cursorSize()));
210  m_cmbSize->setCurrentIndex (index);
211  m_spinLineWidth->setValue (m_modelDigitizeCurveAfter->cursorLineWidth());
212 
213  updateControls();
214  enableOk (false); // Disable Ok button since there not yet any changes
215  updatePreview();
216 }
217 
218 void DlgSettingsDigitizeCurve::slotCursorCustom (bool)
219 {
220  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::slotCursorCustom";
221 
222  m_modelDigitizeCurveAfter->setCursorStandardCross(false);
223  updateControls();
224  updatePreview();
225 }
226 
227 void DlgSettingsDigitizeCurve::slotCursorInnerRadius (const QString &)
228 {
229  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::slotCursorInnerRadius";
230 
231  m_modelDigitizeCurveAfter->setCursorInnerRadius (m_spinInnerRadius->value());
232  updateControls();
233  updatePreview();
234 }
235 
236 void DlgSettingsDigitizeCurve::slotCursorLineWidth (const QString &)
237 {
238  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::slotCursorLineWidth";
239 
240  m_modelDigitizeCurveAfter->setCursorLineWidth (m_spinLineWidth->value());
241  updateControls();
242  updatePreview();
243 }
244 
245 void DlgSettingsDigitizeCurve::slotCursorSize (const QString &)
246 {
247  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::slotCursorSize";
248 
249  m_modelDigitizeCurveAfter->setCursorSize ((CursorSize) m_cmbSize->currentData().toInt());
250  updateControls();
251  updatePreview();
252 }
253 
254 void DlgSettingsDigitizeCurve::slotCursorStandard (bool)
255 {
256  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::slotCursorStandard";
257 
258  m_modelDigitizeCurveAfter->setCursorStandardCross(true);
259  updateControls();
260  updatePreview();
261 }
262 
263 void DlgSettingsDigitizeCurve::updateControls()
264 {
265  // Cursor has to fit into current extent
266  bool isGoodState = 2 * (m_modelDigitizeCurveAfter->cursorInnerRadius() + LINE_LENGTH_MIN) <=
267  CursorSizeToPixels (m_modelDigitizeCurveAfter->cursorSize());
268  enableOk (isGoodState);
269 
270  m_spinInnerRadius->setEnabled (m_btnCustom->isChecked());
271  m_cmbSize->setEnabled (m_btnCustom->isChecked());
272  m_spinLineWidth->setEnabled (m_btnCustom->isChecked());
273 }
274 
275 void DlgSettingsDigitizeCurve::updatePreview()
276 {
277  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsDigitizeCurve::updatePreview";
278 
279  CursorFactory cursorFactory;
280  QCursor cursor = cursorFactory.generate (*m_modelDigitizeCurveAfter);
281  m_viewPreview->setCursor (cursor);
282 }
DlgSettingsDigitizeCurve(MainWindow &mainWindow)
Single constructor.
int cursorLineWidth() const
Get method for cursor line width.
virtual void load(CmdMediator &cmdMediator)
Load settings from Document.
virtual void createOptionalSaveDefault(QHBoxLayout *layout)
Let subclass define an optional Save As Default button.
Create standard cross cursor, or custom cursor, according to settings.
Definition: CursorFactory.h:15
void setCursorLineWidth(int lineWidth)
Set method for cursor line width.
void setCmdMediator(CmdMediator &cmdMediator)
Store CmdMediator for easy access by the leaf class.
virtual void handleOk()
Process slotOk.
bool cursorStandardCross() const
Get method for cursor type.
Document & document()
Provide the Document to commands, primarily for undo/redo processing.
Definition: CmdMediator.cpp:72
void setCursorSize(CursorSize cursorSize)
Set method for cursor size.
Model for DlgSettingsDigitizeCurve and CmdSettingsDigitizeCurve.
Class that modifies QGraphicsView to automatically expand/shrink the view to fit the window...
Definition: ViewPreview.h:14
int cursorInnerRadius() const
Get method for cursor inner radius.
void setCursorInnerRadius(int innerRadius)
Set method for cursor inner radius.
void finishPanel(QWidget *subPanel)
Add Ok and Cancel buttons to subpanel to get the whole dialog.
virtual QWidget * createSubPanel()
Create dialog-specific panel to which base class will add Ok and Cancel buttons.
static int MINIMUM_PREVIEW_HEIGHT
Dialog layout constant that guarantees preview has sufficent room.
void enableOk(bool enable)
Let leaf subclass control the Ok button.
CursorSize cursorSize() const
Get method for cursor size.
Command for DlgSettingsDigitizeCurve.
Command queue stack.
Definition: CmdMediator.h:23
Abstract base class for all Settings dialogs.
QCursor generate(const DocumentModelDigitizeCurve &modelDigitizeCurve) const
Factory method to generate standard or custom cursor.
MainWindow & mainWindow()
Get method for MainWindow.
Main window consisting of menu, graphics scene, status bar and optional toolbars as a Single Document...
Definition: MainWindow.h:83
CmdMediator & cmdMediator()
Provide access to Document information wrapped inside CmdMediator.
void setCursorStandardCross(bool cursorStandardCross)
Set method for cursor type.