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DlgSettingsSegments.cpp
1 #include "CmdMediator.h"
2 #include "CmdSettingsSegments.h"
3 #include "DlgSettingsSegments.h"
4 #include "EngaugeAssert.h"
5 #include "Logger.h"
6 #include "MainWindow.h"
7 #include "PointStyle.h"
8 #include <QCheckBox>
9 #include <QComboBox>
10 #include <QGridLayout>
11 #include <QGraphicsScene>
12 #include <QLabel>
13 #include <qmath.h>
14 #include <QSpinBox>
15 #include "Segment.h"
16 #include "SegmentFactory.h"
17 #include "ViewPreview.h"
18 
19 const int MIN_LENGTH_MIN = 1;
20 const int MIN_LENGTH_MAX = 10000;
21 const int POINT_SEPARATION_MIN = 5;
22 const int POINT_SEPARATION_MAX = 10000;
23 
24 const int IMAGE_WIDTH = 400;
25 const int IMAGE_HEIGHT = 300;
26 
27 const double TWOPI = 2.0 * 3.1415926535;
28 
29 const double BRUSH_WIDTH = 2.0;
30 
32  DlgSettingsAbstractBase ("Segment Fill",
33  "DlgSettingsSegments",
34  mainWindow),
35  m_scenePreview (0),
36  m_viewPreview (0),
37  m_modelSegmentsBefore (0),
38  m_modelSegmentsAfter (0),
39  m_loading (false)
40 {
41  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::DlgSettingsSegments";
42 
43  QWidget *subPanel = createSubPanel ();
44  finishPanel (subPanel);
45 }
46 
47 DlgSettingsSegments::~DlgSettingsSegments()
48 {
49  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::~DlgSettingsSegments";
50 }
51 
52 void DlgSettingsSegments::clearPoints ()
53 {
54  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::clearPoints";
55 
56  QList<GraphicsPoint*>::iterator itrP;
57  for (itrP = m_points.begin(); itrP != m_points.end(); itrP++) {
58  GraphicsPoint *point = *itrP;
59  delete point;
60  }
61 
62  m_points.clear();
63 }
64 
65 void DlgSettingsSegments::createControls (QGridLayout *layout,
66  int &row)
67 {
68  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::createControls";
69 
70  QLabel *labelMinLength = new QLabel("Minimum length (points):");
71  layout->addWidget(labelMinLength, row, 1);
72 
73  m_spinMinLength = new QSpinBox;
74  m_spinMinLength->setRange (MIN_LENGTH_MIN, MIN_LENGTH_MAX);
75  m_spinMinLength->setWhatsThis (tr ("Select a minimum number of points in a segment.\n\n"
76  "Only segments with more points will be created.\n\n"
77  "This value should be as large as possible to reduce memory usage. This value has "
78  "a lower limit"));
79  connect (m_spinMinLength, SIGNAL (valueChanged (const QString &)), this, SLOT (slotMinLength (const QString &)));
80  layout->addWidget(m_spinMinLength, row++, 2);
81 
82  QLabel *labelPointSeparation = new QLabel("Point separation (pixels):");
83  layout->addWidget (labelPointSeparation, row, 1);
84 
85  m_spinPointSeparation = new QSpinBox;
86  m_spinPointSeparation->setRange (POINT_SEPARATION_MIN, POINT_SEPARATION_MAX);
87  m_spinPointSeparation->setWhatsThis (tr ("Select a point separation in pixels.\n\n"
88  "Successive points added to a segment will be separated by this number of pixels. "
89  "If Fill Corners is enabled, then additional points will be inserted at corners so some points "
90  "will be closer.\n\n"
91  "This value has a lower limit"));
92  connect (m_spinPointSeparation, SIGNAL (valueChanged (const QString &)), this, SLOT (slotPointSeparation (const QString &)));
93  layout->addWidget (m_spinPointSeparation, row++, 2);
94 
95  QLabel *labelFillCorners = new QLabel ("Fill corners:");
96  layout->addWidget (labelFillCorners, row, 1);
97 
98  m_chkFillCorners = new QCheckBox;
99  m_chkFillCorners->setWhatsThis (tr ("Fill corners.\n\n"
100  "In addition to the points placed at regular intervals, this option causes a point to be "
101  "placed at each corner. This option can capture important information in piecewise linear graphs, "
102  "but gradually curving graphs may not benefit from the additional points"));
103  connect (m_chkFillCorners, SIGNAL (stateChanged (int)), this, SLOT (slotFillCorners (int)));
104  layout->addWidget (m_chkFillCorners, row++, 2);
105 
106  QLabel *labelLineWidth = new QLabel("Line width:");
107  layout->addWidget (labelLineWidth, row, 1);
108 
109  m_spinLineWidth = new QSpinBox;
110  m_spinLineWidth->setWhatsThis (tr ("Select a size for the lines drawn along a segment"));
111  m_spinLineWidth->setMinimum(1);
112  connect (m_spinLineWidth, SIGNAL (valueChanged (int)), this, SLOT (slotLineWidth (int)));
113  layout->addWidget (m_spinLineWidth, row++, 2);
114 
115  QLabel *labelLineColor = new QLabel("Line color:");
116  layout->addWidget (labelLineColor, row, 1);
117 
118  m_cmbLineColor = new QComboBox;
119  m_cmbLineColor->setWhatsThis (tr ("Select a color for the lines drawn along a segment"));
120  populateColorComboWithTransparent (*m_cmbLineColor);
121  connect (m_cmbLineColor, SIGNAL (activated (const QString &)), this, SLOT (slotLineColor (const QString &))); // activated() ignores code changes
122  layout->addWidget (m_cmbLineColor, row++, 2);
123 }
124 
125 void DlgSettingsSegments::createPreview (QGridLayout *layout,
126  int &row)
127 {
128  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::createPreview";
129 
130  QLabel *labelPreview = new QLabel ("Preview");
131  layout->addWidget (labelPreview, row++, 0, 1, 4);
132 
133  m_scenePreview = new QGraphicsScene (this);
134  m_viewPreview = new ViewPreview (m_scenePreview,
135  ViewPreview::VIEW_ASPECT_RATIO_VARIABLE,
136  this);
137  m_viewPreview->setWhatsThis (tr ("Preview window shows the shortest line that can be segment filled, "
138  "and the effects of current settings on segments and points generated by segment fill"));
139  m_viewPreview->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
140  m_viewPreview->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
141  m_viewPreview->setMinimumHeight (MINIMUM_PREVIEW_HEIGHT);
142 
143  layout->addWidget (m_viewPreview, row++, 0, 1, 4);
144 }
145 
146 QImage DlgSettingsSegments::createPreviewImage () const
147 {
148  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::createPreviewImage";
149 
150  QImage image (IMAGE_WIDTH,
151  IMAGE_HEIGHT,
152  QImage::Format_RGB32);
153  image.fill (Qt::white);
154  QPainter painter (&image);
155  painter.setRenderHint(QPainter::Antialiasing);
156  painter.setPen (QPen (QBrush (Qt::black), BRUSH_WIDTH));
157 
158  int margin = IMAGE_WIDTH / 15;
159  int yCenter = IMAGE_HEIGHT / 2;
160  int yHeight = IMAGE_HEIGHT / 4;
161  int x, y, xLast, yLast;
162  bool isFirst;
163 
164  // Draw sinusoid
165  isFirst = true;
166  int xStart = margin, xEnd = IMAGE_WIDTH / 2 - margin;
167  for (x = xStart; x < xEnd; x++) {
168  double s = (double) (x - xStart) / (double) (xEnd - xStart);
169  int y = yCenter - yHeight * qSin (TWOPI * s);
170 
171  if (!isFirst) {
172  painter.drawLine (xLast, yLast, x, y);
173  }
174  isFirst = false;
175  xLast = x;
176  yLast = y;
177  }
178 
179  // Draw triangular waveform that looks like sinusoid straightened up into line segments
180  isFirst = true;
181  xStart = IMAGE_WIDTH / 2 + margin, xEnd = IMAGE_WIDTH - margin;
182  for (x = xStart; x < xEnd; x++) {
183  double s = (double) (x - xStart) / (double) (xEnd - xStart);
184  if (s <= 0.25) {
185  y = yCenter - yHeight * (4.0 * s);
186  } else if (s < 0.75) {
187  y = yCenter - yHeight * (1.0 - 4.0 * (s - 0.25));
188  } else {
189  y = yCenter + yHeight * (1.0 - 4 * (s - 0.75));
190  }
191 
192  if (!isFirst) {
193  painter.drawLine (xLast, yLast, x, y);
194  }
195  isFirst = false;
196  xLast = x;
197  yLast = y;
198  }
199 
200  return image;
201 }
202 
204 {
205  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::createSubPanel";
206 
207  QWidget *subPanel = new QWidget ();
208  QGridLayout *layout = new QGridLayout (subPanel);
209  subPanel->setLayout (layout);
210 
211  layout->setColumnStretch (0, 1); // Empty first column
212  layout->setColumnStretch (1, 0); // Labels
213  layout->setColumnStretch (2, 0); // User controls
214  layout->setColumnStretch (3, 1); // Empty last column
215 
216  int row = 0;
217  createControls(layout, row);
218  createPreview (layout, row);
219  QPixmap pixmap = QPixmap::fromImage (createPreviewImage());
220  m_scenePreview->addPixmap (pixmap);
221 
222  return subPanel;
223 }
224 
226 {
227  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::handleOk";
228 
230  cmdMediator ().document(),
231  *m_modelSegmentsBefore,
232  *m_modelSegmentsAfter);
233  cmdMediator ().push (cmd);
234 
235  hide ();
236 }
237 
239 {
240  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::load";
241 
242  // Loading starts here
243  m_loading = true;
244 
245  setCmdMediator (cmdMediator);
246 
247  // Flush old data
248  if (m_modelSegmentsBefore != 0) {
249  delete m_modelSegmentsBefore;
250  }
251  if (m_modelSegmentsAfter != 0) {
252  delete m_modelSegmentsAfter;
253  }
254 
255  // Save new data
256  m_modelSegmentsBefore = new DocumentModelSegments (cmdMediator.document());
257  m_modelSegmentsAfter = new DocumentModelSegments (cmdMediator.document());
258 
259  // Sanity checks. Incoming defaults must be acceptable to the local limits
260  ENGAUGE_ASSERT (MIN_LENGTH_MIN <= m_modelSegmentsAfter->minLength ());
261  ENGAUGE_ASSERT (MIN_LENGTH_MAX >= m_modelSegmentsAfter->minLength ());
262  ENGAUGE_ASSERT (POINT_SEPARATION_MIN <= m_modelSegmentsAfter->pointSeparation());
263  ENGAUGE_ASSERT (POINT_SEPARATION_MAX >= m_modelSegmentsAfter->pointSeparation());
264 
265  // Populate controls
266  m_spinPointSeparation->setValue (m_modelSegmentsAfter->pointSeparation());
267  m_spinMinLength->setValue (m_modelSegmentsAfter->minLength());
268  m_chkFillCorners->setChecked (m_modelSegmentsAfter->fillCorners ());
269  m_spinLineWidth->setValue (m_modelSegmentsAfter->lineWidth());
270 
271  int indexLineColor = m_cmbLineColor->findData(QVariant (m_modelSegmentsAfter->lineColor()));
272  ENGAUGE_ASSERT (indexLineColor >= 0);
273  m_cmbLineColor->setCurrentIndex(indexLineColor);
274 
275  // Loading finishes here
276  m_loading = false;
277 
278  updateControls();
279  enableOk (false); // Disable Ok button since there not yet any changes
280  updatePreview();
281 }
282 
283 void DlgSettingsSegments::slotFillCorners (int state)
284 {
285  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::slotFillCorner";
286 
287  m_modelSegmentsAfter->setFillCorners(state == Qt::Checked);
288  updateControls();
289  updatePreview();
290 }
291 
292 void DlgSettingsSegments::slotLineColor (const QString &)
293 {
294  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::slotLineColor";
295 
296  m_modelSegmentsAfter->setLineColor((ColorPalette) m_cmbLineColor->currentData().toInt());
297  updateControls();
298  updatePreview();
299 }
300 
301 void DlgSettingsSegments::slotLineWidth (int lineWidth)
302 {
303  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::slotLineWidth";
304 
305  m_modelSegmentsAfter->setLineWidth(lineWidth);
306  updateControls();
307  updatePreview();
308 }
309 
310 void DlgSettingsSegments::slotMinLength (const QString &minLength)
311 {
312  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::slotMinLength";
313 
314  m_modelSegmentsAfter->setMinLength(minLength.toDouble());
315  updateControls();
316  updatePreview();
317 }
318 
319 void DlgSettingsSegments::slotPointSeparation (const QString &pointSeparation)
320 {
321  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::slotPointSeparation";
322 
323  m_modelSegmentsAfter->setPointSeparation(pointSeparation.toDouble());
324  updateControls();
325  updatePreview();
326 }
327 
328 void DlgSettingsSegments::updateControls()
329 {
330  enableOk (true);
331 }
332 
333 void DlgSettingsSegments::updatePreview()
334 {
335  LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::updatePreview"
336  << " loading=" << (m_loading ? "true" : "false");
337 
338  const QString ARBITRARY_IDENTIFIER ("");
339  const QColor COLOR (Qt::blue);
340  const int RADIUS = 5;
341 
342  if (!m_loading) {
343 
344  SegmentFactory segmentFactory (*m_scenePreview,
345  mainWindow().isGnuplot());
346 
347  clearPoints();
348  segmentFactory.clearSegments (m_segments);
349 
350  // Create new segments
351  segmentFactory.makeSegments (createPreviewImage(),
352  *m_modelSegmentsAfter,
353  m_segments);
354 
355  // Make the segment visible
356  QList<Segment*>::iterator itrS;
357  for (itrS = m_segments.begin(); itrS != m_segments.end(); itrS++) {
358  Segment *segment = *itrS;
359  segment->slotHover (true);
360  }
361 
362  // Create some points
363  PointStyle pointStyle (POINT_SHAPE_CROSS,
364  RADIUS,
365  BRUSH_WIDTH,
366  COLOR_PALETTE_BLUE);
367  QPolygonF polygon = pointStyle.polygon();
368  QList<QPoint> points = segmentFactory.fillPoints (*m_modelSegmentsAfter,
369  m_segments);
370  QList<QPoint>::iterator itrP;
371  for (itrP = points.begin(); itrP != points.end(); itrP++) {
372  QPoint pos = *itrP;
373  GraphicsPoint *graphicsPoint = new GraphicsPoint (*m_scenePreview,
374  ARBITRARY_IDENTIFIER,
375  pos,
376  COLOR,
377  polygon,
378  BRUSH_WIDTH);
379  m_points.push_back (graphicsPoint);
380  }
381  }
382 }
ColorPalette lineColor() const
Get method for line color.
void setLineColor(ColorPalette lineColor)
Set method for line color.
void setMinLength(double minLength)
Set method for min length.
void setCmdMediator(CmdMediator &cmdMediator)
Store CmdMediator for easy access by the leaf class.
Document & document()
Provide the Document to commands, primarily for undo/redo processing.
Definition: CmdMediator.cpp:61
double pointSeparation() const
Get method for point separation.
virtual void load(CmdMediator &cmdMediator)
Load settings from Document.
void setLineWidth(double lineWidth)
Set method for line width.
Factory class for Segment objects.
void slotHover(bool hover)
Slot for hover enter/leave events in the associated SegmentLines.
Definition: Segment.cpp:519
Class that modifies QGraphicsView to automatically expand/shrink the view to fit the window...
Definition: ViewPreview.h:8
void setFillCorners(bool fillCorners)
Set method for fill corners.
Details for a specific Point.
Definition: PointStyle.h:14
Selectable piecewise-defined line that follows a filtered line in the image.
Definition: Segment.h:15
double lineWidth() const
Get method for line width.
Graphics item for drawing a circular or polygonal Point.
Definition: GraphicsPoint.h:33
void finishPanel(QWidget *subPanel)
Add Ok and Cancel buttons to subpanel to get the whole dialog.
static int MINIMUM_PREVIEW_HEIGHT
Dialog layout constant that guarantees preview has sufficent room.
Command for DlgSettingsSegments.
void enableOk(bool enable)
Let leaf subclass control the Ok button.
Command queue stack.
Definition: CmdMediator.h:16
void populateColorComboWithTransparent(QComboBox &combo)
Add colors in color palette to combobox, with transparent entry at end.
DlgSettingsSegments(MainWindow &mainWindow)
Single constructor.
double minLength() const
Get method for min length.
Model for DlgSettingsSegments and CmdSettingsSegments.
Abstract base class for all Settings dialogs.
virtual void handleOk()
Process slotOk.
virtual QWidget * createSubPanel()
Create dialog-specific panel to which base class will add Ok and Cancel buttons.
void setPointSeparation(double pointSeparation)
Set method for point separation.
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:60
CmdMediator & cmdMediator()
Provide access to Document information wrapped inside CmdMediator.
bool fillCorners() const
Get method for fill corners.