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>
35 #include "analogsignal.hpp"
36 #include "pv/data/analog.hpp"
37 #include "pv/data/analogsegment.hpp"
38 #include "pv/view/view.hpp"
40 #include <libsigrokcxx/libsigrokcxx.hpp>
45 using std::shared_ptr;
48 using sigrok::Channel;
53 const QColor AnalogSignal::SignalColours[4] = {
54 QColor(0xC4, 0xA0, 0x00), // Yellow
55 QColor(0x87, 0x20, 0x7A), // Magenta
56 QColor(0x20, 0x4A, 0x87), // Blue
57 QColor(0x4E, 0x9A, 0x06) // Green
60 const QColor AnalogSignal::GridMajorColor = QColor(0xB0, 0xB0, 0xB0);
61 const QColor AnalogSignal::GridMinorColor = QColor(0xD0, 0xD0, 0xD0);
63 const float AnalogSignal::EnvelopeThreshold = 256.0f;
65 const int AnalogSignal::MaximumVDivs = 10;
66 const int AnalogSignal::MinScaleIndex = -6;
67 const int AnalogSignal::MaxScaleIndex = 7;
69 AnalogSignal::AnalogSignal(
71 shared_ptr<Channel> channel,
72 shared_ptr<data::Analog> data) :
73 Signal(session, channel),
75 scale_index_(4), // 20 per div
76 scale_index_drag_offset_(0),
77 div_height_(3 * QFontMetrics(QApplication::font()).height()),
81 set_colour(SignalColours[channel_->index() % countof(SignalColours)]);
85 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
90 shared_ptr<pv::data::Analog> AnalogSignal::analog_data() const
95 std::pair<int, int> AnalogSignal::v_extents() const
97 const int h = vdivs_ * div_height_;
98 return make_pair(-h, h);
101 int AnalogSignal::scale_handle_offset() const
103 const int h = vdivs_ * div_height_;
105 return ((scale_index_drag_offset_ - scale_index_) *
109 void AnalogSignal::scale_handle_dragged(int offset)
111 const int h = vdivs_ * div_height_;
113 scale_index_ = scale_index_drag_offset_ -
114 (offset + h / 2) / (h / 4);
119 void AnalogSignal::scale_handle_drag_release()
121 scale_index_drag_offset_ = scale_index_;
125 void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp)
127 if (channel_->enabled()) {
128 Trace::paint_back(p, pp);
129 paint_axis(p, pp, get_visual_y());
133 void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
138 const int y = get_visual_y();
140 if (!channel_->enabled())
143 paint_grid(p, y, pp.left(), pp.right());
145 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
146 data_->analog_segments();
147 if (segments.empty())
150 const shared_ptr<pv::data::AnalogSegment> &segment =
153 const double pixels_offset = pp.pixels_offset();
154 const double samplerate = max(1.0, segment->samplerate());
155 const pv::util::Timestamp& start_time = segment->start_time();
156 const int64_t last_sample = segment->get_sample_count() - 1;
157 const double samples_per_pixel = samplerate * pp.scale();
158 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
159 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
161 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
162 (int64_t)0), last_sample);
163 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
164 (int64_t)0), last_sample);
166 if (samples_per_pixel < EnvelopeThreshold)
167 paint_trace(p, segment, y, pp.left(),
168 start_sample, end_sample,
169 pixels_offset, samples_per_pixel);
171 paint_envelope(p, segment, y, pp.left(),
172 start_sample, end_sample,
173 pixels_offset, samples_per_pixel);
176 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
178 p.setPen(QPen(GridMajorColor, 0.5, Qt::DashLine));
179 for (int i = 1; i <= vdivs_; i++) {
180 const int dy = i * div_height_;
181 p.drawLine(QLineF(left, y - dy, right, y - dy));
182 p.drawLine(QLineF(left, y + dy, right, y + dy));
185 p.setPen(QPen(GridMinorColor, 0.5, Qt::DashLine));
186 for (int i = 0; i < vdivs_; i++) {
187 const int dy = i * div_height_;
188 const float dy25 = dy + (0.25 * div_height_);
189 const float dy50 = dy + (0.50 * div_height_);
190 const float dy75 = dy + (0.75 * div_height_);
191 p.drawLine(QLineF(left, y - dy25, right, y - dy25));
192 p.drawLine(QLineF(left, y + dy25, right, y + dy25));
193 p.drawLine(QLineF(left, y - dy50, right, y - dy50));
194 p.drawLine(QLineF(left, y + dy50, right, y + dy50));
195 p.drawLine(QLineF(left, y - dy75, right, y - dy75));
196 p.drawLine(QLineF(left, y + dy75, right, y + dy75));
200 void AnalogSignal::paint_trace(QPainter &p,
201 const shared_ptr<pv::data::AnalogSegment> &segment,
202 int y, int left, const int64_t start, const int64_t end,
203 const double pixels_offset, const double samples_per_pixel)
205 const int64_t sample_count = end - start;
207 const float *const samples = segment->get_samples(start, end);
212 QPointF *points = new QPointF[sample_count];
213 QPointF *point = points;
215 for (int64_t sample = start; sample != end; sample++) {
216 const float x = (sample / samples_per_pixel -
217 pixels_offset) + left;
218 *point++ = QPointF(x,
219 y - samples[sample - start] * scale_);
222 p.drawPolyline(points, point - points);
228 void AnalogSignal::paint_envelope(QPainter &p,
229 const shared_ptr<pv::data::AnalogSegment> &segment,
230 int y, int left, const int64_t start, const int64_t end,
231 const double pixels_offset, const double samples_per_pixel)
233 using pv::data::AnalogSegment;
235 AnalogSegment::EnvelopeSection e;
236 segment->get_envelope_section(e, start, end, samples_per_pixel);
241 p.setPen(QPen(Qt::NoPen));
244 QRectF *const rects = new QRectF[e.length];
245 QRectF *rect = rects;
247 for (uint64_t sample = 0; sample < e.length-1; sample++) {
248 const float x = ((e.scale * sample + e.start) /
249 samples_per_pixel - pixels_offset) + left;
250 const AnalogSegment::EnvelopeSample *const s =
253 // We overlap this sample with the next so that vertical
254 // gaps do not appear during steep rising or falling edges
255 const float b = y - max(s->max, (s+1)->min) * scale_;
256 const float t = y - min(s->min, (s+1)->max) * scale_;
259 if (h >= 0.0f && h <= 1.0f)
261 if (h <= 0.0f && h >= -1.0f)
264 *rect++ = QRectF(x, t, 1.0f, h);
267 p.drawRects(rects, e.length);
273 float AnalogSignal::get_resolution(int scale_index)
275 const float seq[] = {1.0f, 2.0f, 5.0f};
277 const int offset = std::numeric_limits<int>::max() / (2 * countof(seq));
278 const std::div_t d = std::div(
279 (int)(scale_index + countof(seq) * offset),
282 return powf(10.0f, d.quot - offset) * seq[d.rem];
285 void AnalogSignal::update_scale()
287 resolution_ = get_resolution(scale_index_);
288 scale_ = div_height_ / resolution_;
291 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
293 // Add the standard options
294 Signal::populate_popup_form(parent, form);
296 QFormLayout *const layout = new QFormLayout;
298 // Add the number of vdivs
299 QSpinBox *vdiv_sb = new QSpinBox(parent);
300 vdiv_sb->setRange(1, MaximumVDivs);
301 vdiv_sb->setValue(vdivs_);
302 connect(vdiv_sb, SIGNAL(valueChanged(int)),
303 this, SLOT(on_vdivs_changed(int)));
304 layout->addRow(tr("Number of vertical divs"), vdiv_sb);
306 // Add the vertical resolution
307 resolution_cb_ = new QComboBox(parent);
309 for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
310 const QString label = QString("%1").arg(get_resolution(i));
311 resolution_cb_->insertItem(0, label, QVariant(i));
314 const int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
315 resolution_cb_->setCurrentIndex(cur_idx);
317 connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
318 this, SLOT(on_resolution_changed(int)));
320 QGridLayout *const vdiv_layout = new QGridLayout;
321 QLabel *const vdiv_unit = new QLabel(tr("V/div"));
322 vdiv_layout->addWidget(resolution_cb_, 0, 0);
323 vdiv_layout->addWidget(vdiv_unit, 0, 1);
325 layout->addRow(tr("Vertical resolution"), vdiv_layout);
327 form->addRow(layout);
330 void AnalogSignal::on_vdivs_changed(int vdivs)
335 owner_->extents_changed(false, true);
338 void AnalogSignal::on_resolution_changed(int index)
340 scale_index_ = resolution_cb_->itemData(index).toInt();
344 owner_->row_item_appearance_changed(false, true);