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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, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <extdef.h> | |
22 | ||
23 | #include <QApplication> | |
24 | #include <QFontMetrics> | |
25 | #include <QMouseEvent> | |
26 | ||
27 | #include "ruler.hpp" | |
28 | #include "view.hpp" | |
29 | ||
30 | using namespace Qt; | |
31 | ||
32 | using std::shared_ptr; | |
33 | using std::vector; | |
34 | ||
35 | namespace pv { | |
36 | namespace view { | |
37 | ||
38 | const float Ruler::RulerHeight = 2.5f; // x Text Height | |
39 | const int Ruler::MinorTickSubdivision = 4; | |
40 | ||
41 | const float Ruler::HoverArrowSize = 0.5f; // x Text Height | |
42 | ||
43 | Ruler::Ruler(View &parent) : | |
44 | MarginWidget(parent) | |
45 | { | |
46 | setMouseTracking(true); | |
47 | ||
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())); | |
62 | } | |
63 | ||
64 | QSize Ruler::sizeHint() const | |
65 | { | |
66 | const int text_height = calculate_text_height(); | |
67 | return QSize(0, RulerHeight * text_height); | |
68 | } | |
69 | ||
70 | QSize Ruler::extended_size_hint() const | |
71 | { | |
72 | QRectF max_rect; | |
73 | std::vector< std::shared_ptr<TimeItem> > items(view_.time_items()); | |
74 | for (auto &i : items) | |
75 | max_rect = max_rect.united(i->label_rect(QRect())); | |
76 | return QSize(0, sizeHint().height() - max_rect.top() / 2 + | |
77 | ViewItem::HighlightRadius); | |
78 | } | |
79 | ||
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, | |
85 | unsigned precision, | |
86 | bool sign) | |
87 | { | |
88 | const unsigned limit = 60; | |
89 | ||
90 | if (t.is_zero()) | |
91 | return "0"; | |
92 | ||
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); | |
96 | ||
97 | // View zoomed way out -> low precision (0), big distance (>=60s) | |
98 | // -> DD:HH:MM | |
99 | if ((precision == 0) && (distance >= limit)) | |
100 | return pv::util::format_time_minutes(t, 0, sign); | |
101 | ||
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 | |
106 | if (abs(t) < limit) | |
107 | return pv::util::format_time_si_adjusted(t, prefix, precision, "s", sign); | |
108 | else | |
109 | return pv::util::format_time_minutes(t, precision, sign); | |
110 | } | |
111 | ||
112 | vector< shared_ptr<ViewItem> > Ruler::items() | |
113 | { | |
114 | const vector< shared_ptr<TimeItem> > time_items(view_.time_items()); | |
115 | return vector< shared_ptr<ViewItem> >( | |
116 | time_items.begin(), time_items.end()); | |
117 | } | |
118 | ||
119 | shared_ptr<ViewItem> Ruler::get_mouse_over_item(const QPoint &pt) | |
120 | { | |
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)) | |
124 | return *i; | |
125 | return nullptr; | |
126 | } | |
127 | ||
128 | void Ruler::paintEvent(QPaintEvent*) | |
129 | { | |
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(), | |
134 | t, | |
135 | this->view_.tick_prefix(), | |
136 | this->view_.time_unit(), | |
137 | this->view_.tick_precision()); | |
138 | }; | |
139 | ||
140 | tick_position_cache_ = calculate_tick_positions( | |
141 | view_.tick_period(), | |
142 | view_.offset(), | |
143 | view_.scale(), | |
144 | width(), | |
145 | ffunc); | |
146 | } | |
147 | ||
148 | const int ValueMargin = 3; | |
149 | ||
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; | |
154 | ||
155 | QPainter p(this); | |
156 | ||
157 | // Draw the tick marks | |
158 | p.setPen(palette().color(foregroundRole())); | |
159 | ||
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)); | |
165 | } | |
166 | ||
167 | for (const auto& tick: tick_position_cache_->minor) { | |
168 | p.drawLine(QPointF(tick, minor_tick_y1), | |
169 | QPointF(tick, ruler_height)); | |
170 | } | |
171 | ||
172 | // Draw the hover mark | |
173 | draw_hover_mark(p, text_height); | |
174 | ||
175 | p.setRenderHint(QPainter::Antialiasing); | |
176 | ||
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); | |
181 | ||
182 | // Draw the items | |
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); | |
188 | } | |
189 | } | |
190 | ||
191 | Ruler::TickPositions Ruler::calculate_tick_positions( | |
192 | const pv::util::Timestamp& major_period, | |
193 | const pv::util::Timestamp& offset, | |
194 | const double scale, | |
195 | const int width, | |
196 | std::function<QString(const pv::util::Timestamp&)> format_function) | |
197 | { | |
198 | TickPositions tp; | |
199 | ||
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; | |
204 | ||
205 | int division = (round(first_minor_division - | |
206 | first_major_division * MinorTickSubdivision)).convert_to<int>() - 1; | |
207 | ||
208 | double x; | |
209 | ||
210 | do { | |
211 | pv::util::Timestamp t = t0 + division * minor_period; | |
212 | x = ((t - offset) / scale).convert_to<double>(); | |
213 | ||
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)); | |
218 | } else { | |
219 | tp.minor.emplace_back(x); | |
220 | } | |
221 | ||
222 | division++; | |
223 | } while (x < width); | |
224 | ||
225 | return tp; | |
226 | } | |
227 | ||
228 | void Ruler::mouseDoubleClickEvent(QMouseEvent *e) | |
229 | { | |
230 | view_.add_flag(view_.offset() + ((double)e->x() + 0.5) * view_.scale()); | |
231 | } | |
232 | ||
233 | void Ruler::draw_hover_mark(QPainter &p, int text_height) | |
234 | { | |
235 | const int x = view_.hover_point().x(); | |
236 | ||
237 | if (x == -1) | |
238 | return; | |
239 | ||
240 | p.setPen(QPen(Qt::NoPen)); | |
241 | p.setBrush(QBrush(palette().color(foregroundRole()))); | |
242 | ||
243 | const int b = RulerHeight * text_height; | |
244 | const float hover_arrow_size = HoverArrowSize * text_height; | |
245 | const QPointF points[] = { | |
246 | QPointF(x, b), | |
247 | QPointF(x - hover_arrow_size, b - hover_arrow_size), | |
248 | QPointF(x + hover_arrow_size, b - hover_arrow_size) | |
249 | }; | |
250 | p.drawPolygon(points, countof(points)); | |
251 | } | |
252 | ||
253 | int Ruler::calculate_text_height() const | |
254 | { | |
255 | return QFontMetrics(font()).ascent(); | |
256 | } | |
257 | ||
258 | void Ruler::hover_point_changed() | |
259 | { | |
260 | update(); | |
261 | } | |
262 | ||
263 | void Ruler::invalidate_tick_position_cache() | |
264 | { | |
265 | tick_position_cache_ = boost::none; | |
266 | } | |
267 | ||
268 | void Ruler::resizeEvent(QResizeEvent*) | |
269 | { | |
270 | // the tick calculation depends on the width of this widget | |
271 | invalidate_tick_position_cache(); | |
272 | } | |
273 | ||
274 | } // namespace view | |
275 | } // namespace pv |