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>
31 using std::shared_ptr;
38 const float Ruler::RulerHeight = 2.5f; // x Text Height
39 const int Ruler::MinorTickSubdivision = 4;
41 const float Ruler::HoverArrowSize = 0.5f; // x Text Height
43 Ruler::Ruler(View &parent) :
46 setMouseTracking(true);
48 connect(&view_, SIGNAL(hover_point_changed()),
49 this, SLOT(hover_point_changed()));
50 connect(&view_, SIGNAL(offset_changed()),
51 this, SLOT(invalidate_tick_position_cache()));
52 connect(&view_, SIGNAL(scale_changed()),
53 this, SLOT(invalidate_tick_position_cache()));
54 connect(&view_, SIGNAL(tick_prefix_changed()),
55 this, SLOT(invalidate_tick_position_cache()));
56 connect(&view_, SIGNAL(tick_precision_changed()),
57 this, SLOT(invalidate_tick_position_cache()));
58 connect(&view_, SIGNAL(tick_period_changed()),
59 this, SLOT(invalidate_tick_position_cache()));
60 connect(&view_, SIGNAL(time_unit_changed()),
61 this, SLOT(invalidate_tick_position_cache()));
64 QSize Ruler::sizeHint() const
66 const int text_height = calculate_text_height();
67 return QSize(0, RulerHeight * text_height);
70 QSize Ruler::extended_size_hint() const
73 std::vector< std::shared_ptr<TimeItem> > items(view_.time_items());
75 max_rect = max_rect.united(i->label_rect(QRect()));
76 return QSize(0, sizeHint().height() - max_rect.top() / 2 +
77 ViewItem::HighlightRadius);
80 QString Ruler::format_time_with_distance(
81 const pv::util::Timestamp& distance,
82 const pv::util::Timestamp& t,
83 pv::util::SIPrefix prefix,
84 pv::util::TimeUnit unit,
88 const unsigned limit = 60;
93 // If we have to use samples then we have no alternative formats
94 if (unit == pv::util::TimeUnit::Samples)
95 return pv::util::format_time_si_adjusted(t, prefix, precision, "sa", sign);
97 // View zoomed way out -> low precision (0), big distance (>=60s)
99 if ((precision == 0) && (distance >= limit))
100 return pv::util::format_time_minutes(t, 0, sign);
102 // View in "normal" range -> medium precision, medium step size
103 // -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds
104 // View zoomed way in -> high precision (>3), low step size (<1s)
105 // -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds
107 return pv::util::format_time_si_adjusted(t, prefix, precision, "s", sign);
109 return pv::util::format_time_minutes(t, precision, sign);
112 vector< shared_ptr<ViewItem> > Ruler::items()
114 const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
115 return vector< shared_ptr<ViewItem> >(
116 time_items.begin(), time_items.end());
119 shared_ptr<ViewItem> Ruler::get_mouse_over_item(const QPoint &pt)
121 const vector< shared_ptr<TimeItem> > items(view_.time_items());
122 for (auto i = items.rbegin(); i != items.rend(); i++)
123 if ((*i)->enabled() && (*i)->label_rect(rect()).contains(pt))
128 void Ruler::paintEvent(QPaintEvent*)
130 if (!tick_position_cache_) {
131 auto ffunc = [this](const pv::util::Timestamp& t) {
132 return format_time_with_distance(
133 this->view_.tick_period(),
135 this->view_.tick_prefix(),
136 this->view_.time_unit(),
137 this->view_.tick_precision());
140 tick_position_cache_ = calculate_tick_positions(
148 const int ValueMargin = 3;
150 const int text_height = calculate_text_height();
151 const int ruler_height = RulerHeight * text_height;
152 const int major_tick_y1 = text_height + ValueMargin * 2;
153 const int minor_tick_y1 = (major_tick_y1 + ruler_height) / 2;
157 // Draw the tick marks
158 p.setPen(palette().color(foregroundRole()));
160 for (const auto& tick: tick_position_cache_->major) {
161 p.drawText(tick.first, ValueMargin, 0, text_height,
162 AlignCenter | AlignTop | TextDontClip, tick.second);
163 p.drawLine(QPointF(tick.first, major_tick_y1),
164 QPointF(tick.first, ruler_height));
167 for (const auto& tick: tick_position_cache_->minor) {
168 p.drawLine(QPointF(tick, minor_tick_y1),
169 QPointF(tick, ruler_height));
172 // Draw the hover mark
173 draw_hover_mark(p, text_height);
175 p.setRenderHint(QPainter::Antialiasing);
177 // The cursor labels are not drawn with the arrows exactly on the
178 // bottom line of the widget, because then the selection shadow
179 // would be clipped away.
180 const QRect r = rect().adjusted(0, 0, 0, -ViewItem::HighlightRadius);
183 const vector< shared_ptr<TimeItem> > items(view_.time_items());
184 for (auto &i : items) {
185 const bool highlight = !item_dragging_ &&
186 i->label_rect(r).contains(mouse_point_);
187 i->paint_label(p, r, highlight);
191 Ruler::TickPositions Ruler::calculate_tick_positions(
192 const pv::util::Timestamp& major_period,
193 const pv::util::Timestamp& offset,
196 std::function<QString(const pv::util::Timestamp&)> format_function)
200 const pv::util::Timestamp minor_period = major_period / MinorTickSubdivision;
201 const pv::util::Timestamp first_major_division = floor(offset / major_period);
202 const pv::util::Timestamp first_minor_division = ceil(offset / minor_period);
203 const pv::util::Timestamp t0 = first_major_division * major_period;
205 int division = (round(first_minor_division -
206 first_major_division * MinorTickSubdivision)).convert_to<int>() - 1;
211 pv::util::Timestamp t = t0 + division * minor_period;
212 x = ((t - offset) / scale).convert_to<double>();
214 if (division % MinorTickSubdivision == 0) {
215 // Recalculate 't' without using 'minor_period' which is a fraction
216 t = t0 + division / MinorTickSubdivision * major_period;
217 tp.major.emplace_back(x, format_function(t));
219 tp.minor.emplace_back(x);
228 void Ruler::mouseDoubleClickEvent(QMouseEvent *event)
230 view_.add_flag(view_.offset() + ((double)event->x() + 0.5) * view_.scale());
233 void Ruler::draw_hover_mark(QPainter &p, int text_height)
235 const int x = view_.hover_point().x();
240 p.setPen(QPen(Qt::NoPen));
241 p.setBrush(QBrush(palette().color(foregroundRole())));
243 const int b = RulerHeight * text_height;
244 const float hover_arrow_size = HoverArrowSize * text_height;
245 const QPointF points[] = {
247 QPointF(x - hover_arrow_size, b - hover_arrow_size),
248 QPointF(x + hover_arrow_size, b - hover_arrow_size)
250 p.drawPolygon(points, countof(points));
253 int Ruler::calculate_text_height() const
255 return QFontMetrics(font()).ascent();
258 void Ruler::hover_point_changed()
263 void Ruler::invalidate_tick_position_cache()
265 tick_position_cache_ = boost::none;
268 void Ruler::resizeEvent(QResizeEvent*)
270 // the tick calculation depends on the width of this widget
271 invalidate_tick_position_cache();
274 } // namespace TraceView