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;
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(0, 0, 0, 40*256/100);
61 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20*256/100);
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 const int AnalogSignal::InfoTextMarginRight = 20;
70 const int AnalogSignal::InfoTextMarginBottom = 5;
72 AnalogSignal::AnalogSignal(
74 shared_ptr<data::SignalBase> base) :
75 Signal(session, base),
76 scale_index_(4), // 20 per div
77 scale_index_drag_offset_(0),
78 div_height_(3 * QFontMetrics(QApplication::font()).height()),
82 base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
86 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
88 return base_->analog_data();
91 std::pair<int, int> AnalogSignal::v_extents() const
93 const int h = vdivs_ * div_height_;
94 return make_pair(-h, h);
97 int AnalogSignal::scale_handle_offset() const
99 const int h = vdivs_ * div_height_;
101 return ((scale_index_drag_offset_ - scale_index_) *
105 void AnalogSignal::scale_handle_dragged(int offset)
107 const int h = vdivs_ * div_height_;
109 scale_index_ = scale_index_drag_offset_ -
110 (offset + h / 2) / (h / 4);
115 void AnalogSignal::scale_handle_drag_release()
117 scale_index_drag_offset_ = scale_index_;
121 void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp)
123 if (base_->enabled()) {
124 Trace::paint_back(p, pp);
125 paint_axis(p, pp, get_visual_y());
129 void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
131 assert(base_->analog_data());
134 const int y = get_visual_y();
136 if (!base_->enabled())
139 paint_grid(p, y, pp.left(), pp.right());
141 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
142 base_->analog_data()->analog_segments();
143 if (segments.empty())
146 const shared_ptr<pv::data::AnalogSegment> &segment =
149 const double pixels_offset = pp.pixels_offset();
150 const double samplerate = max(1.0, segment->samplerate());
151 const pv::util::Timestamp& start_time = segment->start_time();
152 const int64_t last_sample = segment->get_sample_count() - 1;
153 const double samples_per_pixel = samplerate * pp.scale();
154 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
155 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
157 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
158 (int64_t)0), last_sample);
159 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
160 (int64_t)0), last_sample);
162 if (samples_per_pixel < EnvelopeThreshold)
163 paint_trace(p, segment, y, pp.left(),
164 start_sample, end_sample,
165 pixels_offset, samples_per_pixel);
167 paint_envelope(p, segment, y, pp.left(),
168 start_sample, end_sample,
169 pixels_offset, samples_per_pixel);
172 void AnalogSignal::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
177 const int y = get_visual_y();
179 // Show the info section on the right side of the trace
180 const QString infotext = QString("%1 V/div").arg(resolution_);
182 p.setPen(base_->colour());
183 p.setFont(QApplication::font());
185 const QRectF bounding_rect = QRectF(pp.left(),
186 y + v_extents().first,
187 pp.width() - InfoTextMarginRight,
188 v_extents().second - v_extents().first - InfoTextMarginBottom);
190 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
193 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
195 p.setRenderHint(QPainter::Antialiasing, false);
197 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
198 for (int i = 1; i <= vdivs_; i++) {
199 const float dy = i * div_height_;
200 p.drawLine(QLineF(left, y - dy, right, y - dy));
201 p.drawLine(QLineF(left, y + dy, right, y + dy));
204 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
205 for (int i = 0; i < vdivs_; i++) {
206 const float dy = i * div_height_;
207 const float dy25 = dy + (0.25 * div_height_);
208 const float dy50 = dy + (0.50 * div_height_);
209 const float dy75 = dy + (0.75 * div_height_);
210 p.drawLine(QLineF(left, y - dy25, right, y - dy25));
211 p.drawLine(QLineF(left, y + dy25, right, y + dy25));
212 p.drawLine(QLineF(left, y - dy50, right, y - dy50));
213 p.drawLine(QLineF(left, y + dy50, right, y + dy50));
214 p.drawLine(QLineF(left, y - dy75, right, y - dy75));
215 p.drawLine(QLineF(left, y + dy75, right, y + dy75));
218 p.setRenderHint(QPainter::Antialiasing, true);
221 void AnalogSignal::paint_trace(QPainter &p,
222 const shared_ptr<pv::data::AnalogSegment> &segment,
223 int y, int left, const int64_t start, const int64_t end,
224 const double pixels_offset, const double samples_per_pixel)
226 const int64_t sample_count = end - start;
228 const float *const samples = segment->get_samples(start, end);
231 p.setPen(base_->colour());
233 QPointF *points = new QPointF[sample_count];
234 QPointF *point = points;
236 for (int64_t sample = start; sample != end; sample++) {
237 const float x = (sample / samples_per_pixel -
238 pixels_offset) + left;
239 *point++ = QPointF(x,
240 y - samples[sample - start] * scale_);
243 p.drawPolyline(points, point - points);
249 void AnalogSignal::paint_envelope(QPainter &p,
250 const shared_ptr<pv::data::AnalogSegment> &segment,
251 int y, int left, const int64_t start, const int64_t end,
252 const double pixels_offset, const double samples_per_pixel)
254 using pv::data::AnalogSegment;
256 AnalogSegment::EnvelopeSection e;
257 segment->get_envelope_section(e, start, end, samples_per_pixel);
262 p.setPen(QPen(Qt::NoPen));
263 p.setBrush(base_->colour());
265 QRectF *const rects = new QRectF[e.length];
266 QRectF *rect = rects;
268 for (uint64_t sample = 0; sample < e.length-1; sample++) {
269 const float x = ((e.scale * sample + e.start) /
270 samples_per_pixel - pixels_offset) + left;
271 const AnalogSegment::EnvelopeSample *const s =
274 // We overlap this sample with the next so that vertical
275 // gaps do not appear during steep rising or falling edges
276 const float b = y - max(s->max, (s+1)->min) * scale_;
277 const float t = y - min(s->min, (s+1)->max) * scale_;
280 if (h >= 0.0f && h <= 1.0f)
282 if (h <= 0.0f && h >= -1.0f)
285 *rect++ = QRectF(x, t, 1.0f, h);
288 p.drawRects(rects, e.length);
294 float AnalogSignal::get_resolution(int scale_index)
296 const float seq[] = {1.0f, 2.0f, 5.0f};
298 const int offset = std::numeric_limits<int>::max() / (2 * countof(seq));
299 const std::div_t d = std::div(
300 (int)(scale_index + countof(seq) * offset),
303 return powf(10.0f, d.quot - offset) * seq[d.rem];
306 void AnalogSignal::update_scale()
308 resolution_ = get_resolution(scale_index_);
309 scale_ = div_height_ / resolution_;
312 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
314 // Add the standard options
315 Signal::populate_popup_form(parent, form);
317 QFormLayout *const layout = new QFormLayout;
319 // Add the number of vdivs
320 QSpinBox *vdiv_sb = new QSpinBox(parent);
321 vdiv_sb->setRange(1, MaximumVDivs);
322 vdiv_sb->setValue(vdivs_);
323 connect(vdiv_sb, SIGNAL(valueChanged(int)),
324 this, SLOT(on_vdivs_changed(int)));
325 layout->addRow(tr("Number of vertical divs"), vdiv_sb);
327 // Add the vertical resolution
328 resolution_cb_ = new QComboBox(parent);
330 for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
331 const QString label = QString("%1").arg(get_resolution(i));
332 resolution_cb_->insertItem(0, label, QVariant(i));
335 const int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
336 resolution_cb_->setCurrentIndex(cur_idx);
338 connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
339 this, SLOT(on_resolution_changed(int)));
341 QGridLayout *const vdiv_layout = new QGridLayout;
342 QLabel *const vdiv_unit = new QLabel(tr("V/div"));
343 vdiv_layout->addWidget(resolution_cb_, 0, 0);
344 vdiv_layout->addWidget(vdiv_unit, 0, 1);
346 layout->addRow(tr("Vertical resolution"), vdiv_layout);
348 form->addRow(layout);
351 void AnalogSignal::on_vdivs_changed(int vdivs)
356 // Call order is important, otherwise the lazy event handler won't work
357 owner_->extents_changed(false, true);
358 owner_->row_item_appearance_changed(false, true);
362 void AnalogSignal::on_resolution_changed(int index)
364 scale_index_ = resolution_cb_->itemData(index).toInt();
368 owner_->row_item_appearance_changed(false, true);