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ccdd3ef5 | 1 | /* |
b3f22de0 | 2 | * This file is part of the PulseView project. |
ccdd3ef5 JH |
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 "ruler.h" | |
ca4ec3ea JH |
22 | |
23 | #include "cursor.h" | |
ccdd3ef5 | 24 | #include "view.h" |
b3a7c013 | 25 | #include "viewport.h" |
ccdd3ef5 | 26 | |
cef18fc6 | 27 | #include <extdef.h> |
ccdd3ef5 JH |
28 | |
29 | #include <assert.h> | |
30 | #include <math.h> | |
c43d09e0 | 31 | #include <limits.h> |
ccdd3ef5 | 32 | |
b3a7c013 | 33 | #include <QMouseEvent> |
ccdd3ef5 JH |
34 | #include <QPainter> |
35 | #include <QTextStream> | |
36 | ||
a28a212c JH |
37 | #include <pv/widgets/popup.h> |
38 | ||
58864c5c | 39 | using namespace boost; |
f76af637 JH |
40 | using namespace std; |
41 | ||
ccdd3ef5 JH |
42 | namespace pv { |
43 | namespace view { | |
44 | ||
45 | const int Ruler::MinorTickSubdivision = 4; | |
46 | const int Ruler::ScaleUnits[3] = {1, 2, 5}; | |
47 | ||
48 | const QString Ruler::SIPrefixes[9] = | |
49 | {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"}; | |
50 | const int Ruler::FirstSIPrefixPower = -15; | |
51 | ||
b3a7c013 JH |
52 | const int Ruler::HoverArrowSize = 5; |
53 | ||
ccdd3ef5 | 54 | Ruler::Ruler(View &parent) : |
4030e03d JH |
55 | MarginWidget(parent), |
56 | _dragging(false) | |
ccdd3ef5 | 57 | { |
b3a7c013 JH |
58 | setMouseTracking(true); |
59 | ||
60 | connect(&_view, SIGNAL(hover_point_changed()), | |
61 | this, SLOT(hover_point_changed())); | |
ccdd3ef5 JH |
62 | } |
63 | ||
a2ae0205 JH |
64 | void Ruler::clear_selection() |
65 | { | |
66 | CursorPair &cursors = _view.cursors(); | |
58864c5c JH |
67 | cursors.first()->select(false); |
68 | cursors.second()->select(false); | |
a2ae0205 JH |
69 | update(); |
70 | } | |
71 | ||
3a6fe081 JH |
72 | QString Ruler::format_time(double t, unsigned int prefix, |
73 | unsigned int precision) | |
74 | { | |
75 | const double multiplier = pow(10.0, | |
76 | - prefix * 3 - FirstSIPrefixPower); | |
77 | ||
78 | QString s; | |
79 | QTextStream ts(&s); | |
80 | ts.setRealNumberPrecision(precision); | |
81 | ts << fixed << forcesign << (t * multiplier) << | |
82 | SIPrefixes[prefix] << "s"; | |
83 | return s; | |
84 | } | |
85 | ||
e314eca4 | 86 | void Ruler::paintEvent(QPaintEvent*) |
ccdd3ef5 | 87 | { |
3af62a24 JH |
88 | using namespace Qt; |
89 | ||
3f509c1f JH |
90 | const double SpacingIncrement = 32.0f; |
91 | const double MinValueSpacing = 32.0f; | |
f260e3bf | 92 | const int ValueMargin = 3; |
3f509c1f | 93 | |
ccdd3ef5 | 94 | QPainter p(this); |
ce6e73a8 | 95 | p.setRenderHint(QPainter::Antialiasing); |
ccdd3ef5 | 96 | |
3f509c1f JH |
97 | double min_width = SpacingIncrement, typical_width; |
98 | double tick_period; | |
99 | unsigned int prefix; | |
ccdd3ef5 | 100 | |
3f509c1f JH |
101 | // Find tick spacing, and number formatting that does not cause |
102 | // value to collide. | |
103 | do | |
104 | { | |
105 | const double min_period = _view.scale() * min_width; | |
ccdd3ef5 | 106 | |
3f509c1f JH |
107 | const int order = (int)floorf(log10f(min_period)); |
108 | const double order_decimal = pow(10, order); | |
ccdd3ef5 | 109 | |
3f509c1f | 110 | unsigned int unit = 0; |
ccdd3ef5 | 111 | |
3f509c1f JH |
112 | do |
113 | { | |
114 | tick_period = order_decimal * ScaleUnits[unit++]; | |
115 | } while (tick_period < min_period && unit < countof(ScaleUnits)); | |
ccdd3ef5 | 116 | |
3f509c1f JH |
117 | prefix = (order - FirstSIPrefixPower) / 3; |
118 | assert(prefix < countof(SIPrefixes)); | |
ccdd3ef5 | 119 | |
3f509c1f JH |
120 | |
121 | typical_width = p.boundingRect(0, 0, INT_MAX, INT_MAX, | |
122 | AlignLeft | AlignTop, format_time(_view.offset(), | |
3a6fe081 | 123 | prefix)).width() + MinValueSpacing; |
3f509c1f JH |
124 | |
125 | min_width += SpacingIncrement; | |
126 | ||
127 | } while(typical_width > tick_period / _view.scale()); | |
1b5813fe | 128 | |
ccdd3ef5 | 129 | const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX, |
3af62a24 | 130 | AlignLeft | AlignTop, "8").height(); |
ccdd3ef5 JH |
131 | |
132 | // Draw the tick marks | |
d2caed8d | 133 | p.setPen(palette().color(foregroundRole())); |
ccdd3ef5 JH |
134 | |
135 | const double minor_tick_period = tick_period / MinorTickSubdivision; | |
136 | const double first_major_division = | |
137 | floor(_view.offset() / tick_period); | |
138 | const double first_minor_division = | |
139 | ceil(_view.offset() / minor_tick_period); | |
140 | const double t0 = first_major_division * tick_period; | |
141 | ||
142 | int division = (int)round(first_minor_division - | |
64b678ba | 143 | first_major_division * MinorTickSubdivision) - 1; |
f260e3bf JH |
144 | |
145 | const int major_tick_y1 = text_height + ValueMargin * 2; | |
146 | const int tick_y2 = height(); | |
147 | const int minor_tick_y1 = (major_tick_y1 + tick_y2) / 2; | |
148 | ||
64b678ba | 149 | double x; |
ccdd3ef5 | 150 | |
64b678ba JH |
151 | do { |
152 | const double t = t0 + division * minor_tick_period; | |
153 | x = (t - _view.offset()) / _view.scale(); | |
ccdd3ef5 | 154 | |
333d5bbc | 155 | if (division % MinorTickSubdivision == 0) |
ccdd3ef5 JH |
156 | { |
157 | // Draw a major tick | |
f260e3bf JH |
158 | p.drawText(x, ValueMargin, 0, text_height, |
159 | AlignCenter | AlignTop | TextDontClip, | |
3a6fe081 | 160 | format_time(t, prefix)); |
f260e3bf JH |
161 | p.drawLine(QPointF(x, major_tick_y1), |
162 | QPointF(x, tick_y2)); | |
ccdd3ef5 JH |
163 | } |
164 | else | |
165 | { | |
166 | // Draw a minor tick | |
f260e3bf JH |
167 | p.drawLine(QPointF(x, minor_tick_y1), |
168 | QPointF(x, tick_y2)); | |
ccdd3ef5 JH |
169 | } |
170 | ||
171 | division++; | |
64b678ba JH |
172 | |
173 | } while (x < width()); | |
ccdd3ef5 | 174 | |
f76af637 | 175 | // Draw the cursors |
332afa74 JH |
176 | if (_view.cursors_shown()) |
177 | _view.cursors().draw_markers(p, rect(), prefix); | |
f76af637 | 178 | |
b3a7c013 JH |
179 | // Draw the hover mark |
180 | draw_hover_mark(p); | |
181 | ||
ccdd3ef5 JH |
182 | p.end(); |
183 | } | |
184 | ||
ca4ec3ea JH |
185 | void Ruler::mouseMoveEvent(QMouseEvent *e) |
186 | { | |
4030e03d JH |
187 | if (!(e->buttons() & Qt::LeftButton)) |
188 | return; | |
189 | ||
190 | if ((e->pos() - _mouse_down_point).manhattanLength() < | |
191 | QApplication::startDragDistance()) | |
192 | return; | |
193 | ||
194 | _dragging = true; | |
195 | ||
58864c5c JH |
196 | if (shared_ptr<TimeMarker> m = _grabbed_marker.lock()) |
197 | m->set_time(_view.offset() + | |
198 | ((double)e->x() + 0.5) * _view.scale()); | |
ca4ec3ea JH |
199 | } |
200 | ||
201 | void Ruler::mousePressEvent(QMouseEvent *e) | |
202 | { | |
4030e03d JH |
203 | if (e->buttons() & Qt::LeftButton) |
204 | { | |
205 | _mouse_down_point = e->pos(); | |
206 | ||
58864c5c | 207 | _grabbed_marker.reset(); |
ca4ec3ea | 208 | |
17348f85 JH |
209 | clear_selection(); |
210 | ||
333d5bbc | 211 | if (_view.cursors_shown()) { |
b42d25c4 | 212 | CursorPair &cursors = _view.cursors(); |
58864c5c | 213 | if (cursors.first()->get_label_rect( |
ca4ec3ea | 214 | rect()).contains(e->pos())) |
58864c5c JH |
215 | _grabbed_marker = cursors.first(); |
216 | else if (cursors.second()->get_label_rect( | |
ca4ec3ea | 217 | rect()).contains(e->pos())) |
58864c5c | 218 | _grabbed_marker = cursors.second(); |
ca4ec3ea | 219 | } |
b2a53645 | 220 | |
58864c5c JH |
221 | if (shared_ptr<TimeMarker> m = _grabbed_marker.lock()) |
222 | m->select(); | |
17348f85 | 223 | |
b2a53645 | 224 | selection_changed(); |
ca4ec3ea JH |
225 | } |
226 | } | |
227 | ||
228 | void Ruler::mouseReleaseEvent(QMouseEvent *) | |
229 | { | |
a28a212c JH |
230 | using pv::widgets::Popup; |
231 | ||
232 | if (!_dragging) | |
233 | if (shared_ptr<TimeMarker> m = _grabbed_marker.lock()) { | |
234 | Popup *const p = m->create_popup(&_view); | |
235 | p->set_position(mapToGlobal(QPoint(m->get_x(), | |
236 | height())), Popup::Bottom); | |
237 | p->show(); | |
238 | } | |
239 | ||
4030e03d | 240 | _dragging = false; |
58864c5c | 241 | _grabbed_marker.reset(); |
ca4ec3ea JH |
242 | } |
243 | ||
b3a7c013 JH |
244 | void Ruler::draw_hover_mark(QPainter &p) |
245 | { | |
246 | const int x = _view.hover_point().x(); | |
333d5bbc | 247 | |
4030e03d | 248 | if (x == -1 || _dragging) |
b3a7c013 JH |
249 | return; |
250 | ||
251 | p.setPen(QPen(Qt::NoPen)); | |
ad1d8e2b | 252 | p.setBrush(QBrush(palette().color(foregroundRole()))); |
b3a7c013 JH |
253 | |
254 | const int b = height() - 1; | |
255 | const QPointF points[] = { | |
256 | QPointF(x, b), | |
257 | QPointF(x - HoverArrowSize, b - HoverArrowSize), | |
258 | QPointF(x + HoverArrowSize, b - HoverArrowSize) | |
259 | }; | |
260 | p.drawPolygon(points, countof(points)); | |
261 | } | |
262 | ||
263 | void Ruler::hover_point_changed() | |
264 | { | |
265 | update(); | |
266 | } | |
267 | ||
ccdd3ef5 JH |
268 | } // namespace view |
269 | } // namespace pv |