2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
28 #include <QApplication>
30 #include <QFormLayout>
31 #include <QGridLayout>
36 #include "analogsignal.hpp"
37 #include "pv/data/analog.hpp"
38 #include "pv/data/analogsegment.hpp"
39 #include "pv/data/signalbase.hpp"
40 #include "pv/view/view.hpp"
42 #include <libsigrokcxx/libsigrokcxx.hpp>
47 using std::shared_ptr;
54 const QColor AnalogSignal::SignalColours[4] = {
55 QColor(0xC4, 0xA0, 0x00), // Yellow
56 QColor(0x87, 0x20, 0x7A), // Magenta
57 QColor(0x20, 0x4A, 0x87), // Blue
58 QColor(0x4E, 0x9A, 0x06) // Green
61 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40*256/100);
62 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20*256/100);
64 const float AnalogSignal::EnvelopeThreshold = 256.0f;
66 const int AnalogSignal::MaximumVDivs = 10;
67 const int AnalogSignal::MinScaleIndex = -6;
68 const int AnalogSignal::MaxScaleIndex = 7;
70 const int AnalogSignal::InfoTextMarginRight = 20;
71 const int AnalogSignal::InfoTextMarginBottom = 5;
73 AnalogSignal::AnalogSignal(
75 shared_ptr<data::SignalBase> base) :
76 Signal(session, base),
77 scale_index_(4), // 20 per div
78 scale_index_drag_offset_(0),
79 div_height_(3 * QFontMetrics(QApplication::font()).height()),
83 base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
87 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
89 return base_->analog_data();
92 void AnalogSignal::save_settings(QSettings &settings) const
94 settings.setValue("vdivs", vdivs_);
95 settings.setValue("scale_index", scale_index_);
98 void AnalogSignal::restore_settings(QSettings &settings)
100 if (settings.contains("vdivs"))
101 vdivs_ = settings.value("vdivs").toInt();
103 if (settings.contains("scale_index")) {
104 scale_index_ = settings.value("scale_index").toInt();
109 std::pair<int, int> AnalogSignal::v_extents() const
111 const int h = vdivs_ * div_height_;
112 return make_pair(-h, h);
115 int AnalogSignal::scale_handle_offset() const
117 const int h = vdivs_ * div_height_;
119 return ((scale_index_drag_offset_ - scale_index_) *
123 void AnalogSignal::scale_handle_dragged(int offset)
125 const int h = vdivs_ * div_height_;
127 scale_index_ = scale_index_drag_offset_ -
128 (offset + h / 2) / (h / 4);
133 void AnalogSignal::scale_handle_drag_release()
135 scale_index_drag_offset_ = scale_index_;
139 void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp)
141 if (base_->enabled()) {
142 Trace::paint_back(p, pp);
143 paint_axis(p, pp, get_visual_y());
147 void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
149 assert(base_->analog_data());
152 const int y = get_visual_y();
154 if (!base_->enabled())
157 paint_grid(p, y, pp.left(), pp.right());
159 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
160 base_->analog_data()->analog_segments();
161 if (segments.empty())
164 const shared_ptr<pv::data::AnalogSegment> &segment =
167 const double pixels_offset = pp.pixels_offset();
168 const double samplerate = max(1.0, segment->samplerate());
169 const pv::util::Timestamp& start_time = segment->start_time();
170 const int64_t last_sample = segment->get_sample_count() - 1;
171 const double samples_per_pixel = samplerate * pp.scale();
172 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
173 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
175 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
176 (int64_t)0), last_sample);
177 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
178 (int64_t)0), last_sample);
180 if (samples_per_pixel < EnvelopeThreshold)
181 paint_trace(p, segment, y, pp.left(),
182 start_sample, end_sample,
183 pixels_offset, samples_per_pixel);
185 paint_envelope(p, segment, y, pp.left(),
186 start_sample, end_sample,
187 pixels_offset, samples_per_pixel);
190 void AnalogSignal::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
195 const int y = get_visual_y();
197 // Show the info section on the right side of the trace
198 const QString infotext = QString("%1 V/div").arg(resolution_);
200 p.setPen(base_->colour());
201 p.setFont(QApplication::font());
203 const QRectF bounding_rect = QRectF(pp.left(),
204 y + v_extents().first,
205 pp.width() - InfoTextMarginRight,
206 v_extents().second - v_extents().first - InfoTextMarginBottom);
208 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
211 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
213 p.setRenderHint(QPainter::Antialiasing, false);
215 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
216 for (int i = 1; i <= vdivs_; i++) {
217 const float dy = i * div_height_;
218 p.drawLine(QLineF(left, y - dy, right, y - dy));
219 p.drawLine(QLineF(left, y + dy, right, y + dy));
222 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
223 for (int i = 0; i < vdivs_; i++) {
224 const float dy = i * div_height_;
225 const float dy25 = dy + (0.25 * div_height_);
226 const float dy50 = dy + (0.50 * div_height_);
227 const float dy75 = dy + (0.75 * div_height_);
228 p.drawLine(QLineF(left, y - dy25, right, y - dy25));
229 p.drawLine(QLineF(left, y + dy25, right, y + dy25));
230 p.drawLine(QLineF(left, y - dy50, right, y - dy50));
231 p.drawLine(QLineF(left, y + dy50, right, y + dy50));
232 p.drawLine(QLineF(left, y - dy75, right, y - dy75));
233 p.drawLine(QLineF(left, y + dy75, right, y + dy75));
236 p.setRenderHint(QPainter::Antialiasing, true);
239 void AnalogSignal::paint_trace(QPainter &p,
240 const shared_ptr<pv::data::AnalogSegment> &segment,
241 int y, int left, const int64_t start, const int64_t end,
242 const double pixels_offset, const double samples_per_pixel)
244 const int64_t sample_count = end - start;
246 const float *const samples = segment->get_samples(start, end);
249 p.setPen(base_->colour());
251 QPointF *points = new QPointF[sample_count];
252 QPointF *point = points;
254 for (int64_t sample = start; sample != end; sample++) {
255 const float x = (sample / samples_per_pixel -
256 pixels_offset) + left;
257 *point++ = QPointF(x,
258 y - samples[sample - start] * scale_);
261 p.drawPolyline(points, point - points);
267 void AnalogSignal::paint_envelope(QPainter &p,
268 const shared_ptr<pv::data::AnalogSegment> &segment,
269 int y, int left, const int64_t start, const int64_t end,
270 const double pixels_offset, const double samples_per_pixel)
272 using pv::data::AnalogSegment;
274 AnalogSegment::EnvelopeSection e;
275 segment->get_envelope_section(e, start, end, samples_per_pixel);
280 p.setPen(QPen(Qt::NoPen));
281 p.setBrush(base_->colour());
283 QRectF *const rects = new QRectF[e.length];
284 QRectF *rect = rects;
286 for (uint64_t sample = 0; sample < e.length-1; sample++) {
287 const float x = ((e.scale * sample + e.start) /
288 samples_per_pixel - pixels_offset) + left;
289 const AnalogSegment::EnvelopeSample *const s =
292 // We overlap this sample with the next so that vertical
293 // gaps do not appear during steep rising or falling edges
294 const float b = y - max(s->max, (s+1)->min) * scale_;
295 const float t = y - min(s->min, (s+1)->max) * scale_;
298 if (h >= 0.0f && h <= 1.0f)
300 if (h <= 0.0f && h >= -1.0f)
303 *rect++ = QRectF(x, t, 1.0f, h);
306 p.drawRects(rects, e.length);
312 float AnalogSignal::get_resolution(int scale_index)
314 const float seq[] = {1.0f, 2.0f, 5.0f};
316 const int offset = std::numeric_limits<int>::max() / (2 * countof(seq));
317 const std::div_t d = std::div(
318 (int)(scale_index + countof(seq) * offset),
321 return powf(10.0f, d.quot - offset) * seq[d.rem];
324 void AnalogSignal::update_scale()
326 resolution_ = get_resolution(scale_index_);
327 scale_ = div_height_ / resolution_;
330 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
332 // Add the standard options
333 Signal::populate_popup_form(parent, form);
335 QFormLayout *const layout = new QFormLayout;
337 // Add the number of vdivs
338 QSpinBox *vdiv_sb = new QSpinBox(parent);
339 vdiv_sb->setRange(1, MaximumVDivs);
340 vdiv_sb->setValue(vdivs_);
341 connect(vdiv_sb, SIGNAL(valueChanged(int)),
342 this, SLOT(on_vdivs_changed(int)));
343 layout->addRow(tr("Number of vertical divs"), vdiv_sb);
345 // Add the vertical resolution
346 resolution_cb_ = new QComboBox(parent);
348 for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
349 const QString label = QString("%1").arg(get_resolution(i));
350 resolution_cb_->insertItem(0, label, QVariant(i));
353 const int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
354 resolution_cb_->setCurrentIndex(cur_idx);
356 connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
357 this, SLOT(on_resolution_changed(int)));
359 QGridLayout *const vdiv_layout = new QGridLayout;
360 QLabel *const vdiv_unit = new QLabel(tr("V/div"));
361 vdiv_layout->addWidget(resolution_cb_, 0, 0);
362 vdiv_layout->addWidget(vdiv_unit, 0, 1);
364 layout->addRow(tr("Vertical resolution"), vdiv_layout);
366 form->addRow(layout);
369 void AnalogSignal::on_vdivs_changed(int vdivs)
374 // Call order is important, otherwise the lazy event handler won't work
375 owner_->extents_changed(false, true);
376 owner_->row_item_appearance_changed(false, true);
380 void AnalogSignal::on_resolution_changed(int index)
382 scale_index_ = resolution_cb_->itemData(index).toInt();
386 owner_->row_item_appearance_changed(false, true);
389 } // namespace TraceView