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, see <http://www.gnu.org/licenses/>.
22 #include <QApplication>
23 #include <QFontMetrics>
24 #include <QMouseEvent>
32 using std::shared_ptr;
39 const float Ruler::RulerHeight = 2.5f; // x Text Height
40 const int Ruler::MinorTickSubdivision = 4;
42 const float Ruler::HoverArrowSize = 0.5f; // x Text Height
44 Ruler::Ruler(View &parent) :
47 setMouseTracking(true);
49 connect(&view_, SIGNAL(hover_point_changed(QPoint)),
50 this, SLOT(hover_point_changed(QPoint)));
51 connect(&view_, SIGNAL(offset_changed()),
52 this, SLOT(invalidate_tick_position_cache()));
53 connect(&view_, SIGNAL(scale_changed()),
54 this, SLOT(invalidate_tick_position_cache()));
55 connect(&view_, SIGNAL(tick_prefix_changed()),
56 this, SLOT(invalidate_tick_position_cache()));
57 connect(&view_, SIGNAL(tick_precision_changed()),
58 this, SLOT(invalidate_tick_position_cache()));
59 connect(&view_, SIGNAL(tick_period_changed()),
60 this, SLOT(invalidate_tick_position_cache()));
61 connect(&view_, SIGNAL(time_unit_changed()),
62 this, SLOT(invalidate_tick_position_cache()));
65 QSize Ruler::sizeHint() const
67 const int text_height = calculate_text_height();
68 return QSize(0, RulerHeight * text_height);
71 QSize Ruler::extended_size_hint() const
74 vector< shared_ptr<TimeItem> > items(view_.time_items());
76 max_rect = max_rect.united(i->label_rect(QRect()));
77 return QSize(0, sizeHint().height() - max_rect.top() / 2 +
78 ViewItem::HighlightRadius);
81 QString Ruler::format_time_with_distance(
82 const pv::util::Timestamp& distance,
83 const pv::util::Timestamp& t,
84 pv::util::SIPrefix prefix,
85 pv::util::TimeUnit unit,
89 const unsigned limit = 60;
94 // If we have to use samples then we have no alternative formats
95 if (unit == pv::util::TimeUnit::Samples)
96 return pv::util::format_time_si_adjusted(t, prefix, precision, "sa", sign);
98 // View zoomed way out -> low precision (0), big distance (>=60s)
100 if ((precision == 0) && (distance >= limit))
101 return pv::util::format_time_minutes(t, 0, sign);
103 // View in "normal" range -> medium precision, medium step size
104 // -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds
105 // View zoomed way in -> high precision (>3), low step size (<1s)
106 // -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds
108 return pv::util::format_time_si_adjusted(t, prefix, precision, "s", sign);
110 return pv::util::format_time_minutes(t, precision, sign);
113 vector< shared_ptr<ViewItem> > Ruler::items()
115 const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
116 return vector< shared_ptr<ViewItem> >(
117 time_items.begin(), time_items.end());
120 shared_ptr<ViewItem> Ruler::get_mouse_over_item(const QPoint &pt)
122 const vector< shared_ptr<TimeItem> > items(view_.time_items());
123 for (auto i = items.rbegin(); i != items.rend(); i++)
124 if ((*i)->enabled() && (*i)->label_rect(rect()).contains(pt))
129 void Ruler::paintEvent(QPaintEvent*)
131 if (!tick_position_cache_) {
132 auto ffunc = [this](const pv::util::Timestamp& t) {
133 return format_time_with_distance(
134 this->view_.tick_period(),
136 this->view_.tick_prefix(),
137 this->view_.time_unit(),
138 this->view_.tick_precision());
141 tick_position_cache_ = calculate_tick_positions(
149 const int ValueMargin = 3;
151 const int text_height = calculate_text_height();
152 const int ruler_height = RulerHeight * text_height;
153 const int major_tick_y1 = text_height + ValueMargin * 2;
154 const int minor_tick_y1 = (major_tick_y1 + ruler_height) / 2;
158 // Draw the tick marks
159 p.setPen(palette().color(foregroundRole()));
161 for (const auto& tick: tick_position_cache_->major) {
162 p.drawText(tick.first, ValueMargin, 0, text_height,
163 AlignCenter | AlignTop | TextDontClip, tick.second);
164 p.drawLine(QPointF(tick.first, major_tick_y1),
165 QPointF(tick.first, ruler_height));
168 for (const auto& tick: tick_position_cache_->minor) {
169 p.drawLine(QPointF(tick, minor_tick_y1),
170 QPointF(tick, ruler_height));
173 // Draw the hover mark
174 draw_hover_mark(p, text_height);
176 p.setRenderHint(QPainter::Antialiasing);
178 // The cursor labels are not drawn with the arrows exactly on the
179 // bottom line of the widget, because then the selection shadow
180 // would be clipped away.
181 const QRect r = rect().adjusted(0, 0, 0, -ViewItem::HighlightRadius);
184 const vector< shared_ptr<TimeItem> > items(view_.time_items());
185 for (auto &i : items) {
186 const bool highlight = !item_dragging_ &&
187 i->label_rect(r).contains(mouse_point_);
188 i->paint_label(p, r, highlight);
192 Ruler::TickPositions Ruler::calculate_tick_positions(
193 const pv::util::Timestamp& major_period,
194 const pv::util::Timestamp& offset,
197 function<QString(const pv::util::Timestamp&)> format_function)
201 const pv::util::Timestamp minor_period = major_period / MinorTickSubdivision;
202 const pv::util::Timestamp first_major_division = floor(offset / major_period);
203 const pv::util::Timestamp first_minor_division = ceil(offset / minor_period);
204 const pv::util::Timestamp t0 = first_major_division * major_period;
206 int division = (round(first_minor_division -
207 first_major_division * MinorTickSubdivision)).convert_to<int>() - 1;
212 pv::util::Timestamp t = t0 + division * minor_period;
213 x = ((t - offset) / scale).convert_to<double>();
215 if (division % MinorTickSubdivision == 0) {
216 // Recalculate 't' without using 'minor_period' which is a fraction
217 t = t0 + division / MinorTickSubdivision * major_period;
218 tp.major.emplace_back(x, format_function(t));
220 tp.minor.emplace_back(x);
229 void Ruler::mouseDoubleClickEvent(QMouseEvent *event)
231 view_.add_flag(view_.offset() + ((double)event->x() + 0.5) * view_.scale());
234 void Ruler::draw_hover_mark(QPainter &p, int text_height)
236 const int x = view_.hover_point().x();
241 p.setPen(QPen(Qt::NoPen));
242 p.setBrush(QBrush(palette().color(foregroundRole())));
244 const int b = RulerHeight * text_height;
245 const float hover_arrow_size = HoverArrowSize * text_height;
246 const QPointF points[] = {
248 QPointF(x - hover_arrow_size, b - hover_arrow_size),
249 QPointF(x + hover_arrow_size, b - hover_arrow_size)
251 p.drawPolygon(points, countof(points));
254 int Ruler::calculate_text_height() const
256 return QFontMetrics(font()).ascent();
259 void Ruler::hover_point_changed(const QPoint &hp)
266 void Ruler::invalidate_tick_position_cache()
268 tick_position_cache_ = boost::none;
271 void Ruler::resizeEvent(QResizeEvent*)
273 // the tick calculation depends on the width of this widget
274 invalidate_tick_position_cache();