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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
20 | #include <extdef.h> | |
21 | ||
22 | #include <QApplication> | |
23 | #include <QFontMetrics> | |
24 | #include <QMouseEvent> | |
25 | ||
26 | #include "ruler.hpp" | |
27 | #include "view.hpp" | |
28 | ||
29 | using namespace Qt; | |
30 | ||
31 | using std::function; | |
32 | using std::max; | |
33 | using std::min; | |
34 | using std::shared_ptr; | |
35 | using std::vector; | |
36 | ||
37 | namespace pv { | |
38 | namespace views { | |
39 | namespace trace { | |
40 | ||
41 | const float Ruler::RulerHeight = 2.5f; // x Text Height | |
42 | ||
43 | const float Ruler::HoverArrowSize = 0.5f; // x Text Height | |
44 | ||
45 | Ruler::Ruler(View &parent) : | |
46 | MarginWidget(parent) | |
47 | { | |
48 | setMouseTracking(true); | |
49 | ||
50 | connect(&view_, SIGNAL(hover_point_changed(QPoint)), | |
51 | this, SLOT(hover_point_changed(QPoint))); | |
52 | connect(&view_, SIGNAL(offset_changed()), | |
53 | this, SLOT(invalidate_tick_position_cache())); | |
54 | connect(&view_, SIGNAL(scale_changed()), | |
55 | this, SLOT(invalidate_tick_position_cache())); | |
56 | connect(&view_, SIGNAL(tick_prefix_changed()), | |
57 | this, SLOT(invalidate_tick_position_cache())); | |
58 | connect(&view_, SIGNAL(tick_precision_changed()), | |
59 | this, SLOT(invalidate_tick_position_cache())); | |
60 | connect(&view_, SIGNAL(tick_period_changed()), | |
61 | this, SLOT(invalidate_tick_position_cache())); | |
62 | connect(&view_, SIGNAL(time_unit_changed()), | |
63 | this, SLOT(invalidate_tick_position_cache())); | |
64 | } | |
65 | ||
66 | QSize Ruler::sizeHint() const | |
67 | { | |
68 | const int text_height = calculate_text_height(); | |
69 | return QSize(0, RulerHeight * text_height); | |
70 | } | |
71 | ||
72 | QSize Ruler::extended_size_hint() const | |
73 | { | |
74 | QRectF max_rect; | |
75 | vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
76 | for (auto &i : items) | |
77 | max_rect = max_rect.united(i->label_rect(QRect())); | |
78 | return QSize(0, sizeHint().height() - max_rect.top() / 2 + | |
79 | ViewItem::HighlightRadius); | |
80 | } | |
81 | ||
82 | QString Ruler::format_time_with_distance( | |
83 | const pv::util::Timestamp& distance, | |
84 | const pv::util::Timestamp& t, | |
85 | pv::util::SIPrefix prefix, | |
86 | pv::util::TimeUnit unit, | |
87 | unsigned precision, | |
88 | bool sign) | |
89 | { | |
90 | const unsigned limit = 60; | |
91 | ||
92 | if (t.is_zero()) | |
93 | return "0"; | |
94 | ||
95 | // If we have to use samples then we have no alternative formats | |
96 | if (unit == pv::util::TimeUnit::Samples) | |
97 | return pv::util::format_time_si_adjusted(t, prefix, precision, "sa", sign); | |
98 | ||
99 | // View zoomed way out -> low precision (0), big distance (>=60s) | |
100 | // -> DD:HH:MM | |
101 | if ((precision == 0) && (distance >= limit)) | |
102 | return pv::util::format_time_minutes(t, 0, sign); | |
103 | ||
104 | // View in "normal" range -> medium precision, medium step size | |
105 | // -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds | |
106 | // View zoomed way in -> high precision (>3), low step size (<1s) | |
107 | // -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds | |
108 | if (abs(t) < limit) | |
109 | return pv::util::format_time_si_adjusted(t, prefix, precision, "s", sign); | |
110 | else | |
111 | return pv::util::format_time_minutes(t, precision, sign); | |
112 | } | |
113 | ||
114 | vector< shared_ptr<ViewItem> > Ruler::items() | |
115 | { | |
116 | const vector< shared_ptr<TimeItem> > time_items(view_.time_items()); | |
117 | return vector< shared_ptr<ViewItem> >( | |
118 | time_items.begin(), time_items.end()); | |
119 | } | |
120 | ||
121 | shared_ptr<ViewItem> Ruler::get_mouse_over_item(const QPoint &pt) | |
122 | { | |
123 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
124 | for (auto i = items.rbegin(); i != items.rend(); i++) | |
125 | if ((*i)->enabled() && (*i)->label_rect(rect()).contains(pt)) | |
126 | return *i; | |
127 | return nullptr; | |
128 | } | |
129 | ||
130 | void Ruler::paintEvent(QPaintEvent*) | |
131 | { | |
132 | if (!tick_position_cache_) { | |
133 | auto ffunc = [this](const pv::util::Timestamp& t) { | |
134 | return format_time_with_distance( | |
135 | this->view_.tick_period(), | |
136 | t, | |
137 | this->view_.tick_prefix(), | |
138 | this->view_.time_unit(), | |
139 | this->view_.tick_precision()); | |
140 | }; | |
141 | ||
142 | tick_position_cache_ = calculate_tick_positions( | |
143 | view_.tick_period(), | |
144 | view_.ruler_offset(), | |
145 | view_.scale(), | |
146 | width(), | |
147 | view_.minor_tick_count(), | |
148 | ffunc); | |
149 | } | |
150 | ||
151 | const int ValueMargin = 3; | |
152 | ||
153 | const int text_height = calculate_text_height(); | |
154 | const int ruler_height = RulerHeight * text_height; | |
155 | const int major_tick_y1 = text_height + ValueMargin * 2; | |
156 | const int minor_tick_y1 = (major_tick_y1 + ruler_height) / 2; | |
157 | ||
158 | QPainter p(this); | |
159 | ||
160 | // Draw the tick marks | |
161 | p.setPen(palette().color(foregroundRole())); | |
162 | ||
163 | for (const auto& tick: tick_position_cache_->major) { | |
164 | const int leftedge = 0; | |
165 | const int rightedge = width(); | |
166 | const int x_tick = tick.first; | |
167 | if ((x_tick > leftedge) && (x_tick < rightedge)) { | |
168 | const int x_left_bound = QFontMetrics(font()).width(tick.second) / 2; | |
169 | const int x_right_bound = rightedge - x_left_bound; | |
170 | const int x_legend = min(max(x_tick, x_left_bound), x_right_bound); | |
171 | p.drawText(x_legend, ValueMargin, 0, text_height, | |
172 | AlignCenter | AlignTop | TextDontClip, tick.second); | |
173 | p.drawLine(QPointF(x_tick, major_tick_y1), | |
174 | QPointF(tick.first, ruler_height)); | |
175 | } | |
176 | } | |
177 | ||
178 | for (const auto& tick: tick_position_cache_->minor) { | |
179 | p.drawLine(QPointF(tick, minor_tick_y1), | |
180 | QPointF(tick, ruler_height)); | |
181 | } | |
182 | ||
183 | // Draw the hover mark | |
184 | draw_hover_mark(p, text_height); | |
185 | ||
186 | p.setRenderHint(QPainter::Antialiasing); | |
187 | ||
188 | // The cursor labels are not drawn with the arrows exactly on the | |
189 | // bottom line of the widget, because then the selection shadow | |
190 | // would be clipped away. | |
191 | const QRect r = rect().adjusted(0, 0, 0, -ViewItem::HighlightRadius); | |
192 | ||
193 | // Draw the items | |
194 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
195 | for (auto &i : items) { | |
196 | const bool highlight = !item_dragging_ && | |
197 | i->label_rect(r).contains(mouse_point_); | |
198 | i->paint_label(p, r, highlight); | |
199 | } | |
200 | } | |
201 | ||
202 | Ruler::TickPositions Ruler::calculate_tick_positions( | |
203 | const pv::util::Timestamp& major_period, | |
204 | const pv::util::Timestamp& offset, | |
205 | const double scale, | |
206 | const int width, | |
207 | const unsigned int minor_tick_count, | |
208 | function<QString(const pv::util::Timestamp&)> format_function) | |
209 | { | |
210 | TickPositions tp; | |
211 | ||
212 | const pv::util::Timestamp minor_period = major_period / minor_tick_count; | |
213 | const pv::util::Timestamp first_major_division = floor(offset / major_period); | |
214 | const pv::util::Timestamp first_minor_division = ceil(offset / minor_period); | |
215 | const pv::util::Timestamp t0 = first_major_division * major_period; | |
216 | ||
217 | int division = (round(first_minor_division - | |
218 | first_major_division * minor_tick_count)).convert_to<int>() - 1; | |
219 | ||
220 | double x; | |
221 | ||
222 | do { | |
223 | pv::util::Timestamp t = t0 + division * minor_period; | |
224 | x = ((t - offset) / scale).convert_to<double>(); | |
225 | ||
226 | if (division % minor_tick_count == 0) { | |
227 | // Recalculate 't' without using 'minor_period' which is a fraction | |
228 | t = t0 + division / minor_tick_count * major_period; | |
229 | tp.major.emplace_back(x, format_function(t)); | |
230 | } else { | |
231 | tp.minor.emplace_back(x); | |
232 | } | |
233 | ||
234 | division++; | |
235 | } while (x < width); | |
236 | ||
237 | return tp; | |
238 | } | |
239 | ||
240 | void Ruler::mouseDoubleClickEvent(QMouseEvent *event) | |
241 | { | |
242 | view_.add_flag(view_.ruler_offset() + ((double)event->x() + 0.5) * view_.scale()); | |
243 | } | |
244 | ||
245 | void Ruler::draw_hover_mark(QPainter &p, int text_height) | |
246 | { | |
247 | const int x = view_.hover_point().x(); | |
248 | ||
249 | if (x == -1) | |
250 | return; | |
251 | ||
252 | p.setPen(QPen(Qt::NoPen)); | |
253 | p.setBrush(QBrush(palette().color(foregroundRole()))); | |
254 | ||
255 | const int b = RulerHeight * text_height; | |
256 | const float hover_arrow_size = HoverArrowSize * text_height; | |
257 | const QPointF points[] = { | |
258 | QPointF(x, b), | |
259 | QPointF(x - hover_arrow_size, b - hover_arrow_size), | |
260 | QPointF(x + hover_arrow_size, b - hover_arrow_size) | |
261 | }; | |
262 | p.drawPolygon(points, countof(points)); | |
263 | } | |
264 | ||
265 | int Ruler::calculate_text_height() const | |
266 | { | |
267 | return QFontMetrics(font()).ascent(); | |
268 | } | |
269 | ||
270 | void Ruler::hover_point_changed(const QPoint &hp) | |
271 | { | |
272 | (void)hp; | |
273 | ||
274 | update(); | |
275 | } | |
276 | ||
277 | void Ruler::invalidate_tick_position_cache() | |
278 | { | |
279 | tick_position_cache_ = boost::none; | |
280 | } | |
281 | ||
282 | void Ruler::resizeEvent(QResizeEvent*) | |
283 | { | |
284 | // the tick calculation depends on the width of this widget | |
285 | invalidate_tick_position_cache(); | |
286 | } | |
287 | ||
288 | } // namespace trace | |
289 | } // namespace views | |
290 | } // namespace pv |