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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 | |
b213ef09 | 33 | #include <QApplication> |
b3a7c013 | 34 | #include <QMouseEvent> |
ccdd3ef5 JH |
35 | #include <QPainter> |
36 | #include <QTextStream> | |
37 | ||
a28a212c JH |
38 | #include <pv/widgets/popup.h> |
39 | ||
819f4c25 JH |
40 | using namespace Qt; |
41 | using boost::shared_ptr; | |
f76af637 | 42 | |
ccdd3ef5 JH |
43 | namespace pv { |
44 | namespace view { | |
45 | ||
a6c1726e | 46 | const int Ruler::RulerHeight = 30; |
ccdd3ef5 JH |
47 | const int Ruler::MinorTickSubdivision = 4; |
48 | const int Ruler::ScaleUnits[3] = {1, 2, 5}; | |
49 | ||
50 | const QString Ruler::SIPrefixes[9] = | |
51 | {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"}; | |
52 | const int Ruler::FirstSIPrefixPower = -15; | |
53 | ||
b3a7c013 JH |
54 | const int Ruler::HoverArrowSize = 5; |
55 | ||
ccdd3ef5 | 56 | Ruler::Ruler(View &parent) : |
4030e03d JH |
57 | MarginWidget(parent), |
58 | _dragging(false) | |
ccdd3ef5 | 59 | { |
b3a7c013 JH |
60 | setMouseTracking(true); |
61 | ||
62 | connect(&_view, SIGNAL(hover_point_changed()), | |
63 | this, SLOT(hover_point_changed())); | |
ccdd3ef5 JH |
64 | } |
65 | ||
a2ae0205 JH |
66 | void Ruler::clear_selection() |
67 | { | |
68 | CursorPair &cursors = _view.cursors(); | |
58864c5c JH |
69 | cursors.first()->select(false); |
70 | cursors.second()->select(false); | |
a2ae0205 JH |
71 | update(); |
72 | } | |
73 | ||
3a6fe081 JH |
74 | QString Ruler::format_time(double t, unsigned int prefix, |
75 | unsigned int precision) | |
76 | { | |
77 | const double multiplier = pow(10.0, | |
4d3c4e34 | 78 | (int)- prefix * 3 - FirstSIPrefixPower); |
3a6fe081 JH |
79 | |
80 | QString s; | |
81 | QTextStream ts(&s); | |
82 | ts.setRealNumberPrecision(precision); | |
83 | ts << fixed << forcesign << (t * multiplier) << | |
84 | SIPrefixes[prefix] << "s"; | |
85 | return s; | |
86 | } | |
87 | ||
a6c1726e JH |
88 | QSize Ruler::sizeHint() const |
89 | { | |
90 | return QSize(0, RulerHeight); | |
91 | } | |
92 | ||
e314eca4 | 93 | void Ruler::paintEvent(QPaintEvent*) |
ccdd3ef5 | 94 | { |
3af62a24 | 95 | |
3f509c1f JH |
96 | const double SpacingIncrement = 32.0f; |
97 | const double MinValueSpacing = 32.0f; | |
f260e3bf | 98 | const int ValueMargin = 3; |
3f509c1f | 99 | |
ccdd3ef5 | 100 | QPainter p(this); |
ce6e73a8 | 101 | p.setRenderHint(QPainter::Antialiasing); |
ccdd3ef5 | 102 | |
3f509c1f JH |
103 | double min_width = SpacingIncrement, typical_width; |
104 | double tick_period; | |
105 | unsigned int prefix; | |
ccdd3ef5 | 106 | |
3f509c1f JH |
107 | // Find tick spacing, and number formatting that does not cause |
108 | // value to collide. | |
109 | do | |
110 | { | |
111 | const double min_period = _view.scale() * min_width; | |
ccdd3ef5 | 112 | |
3f509c1f | 113 | const int order = (int)floorf(log10f(min_period)); |
4d3c4e34 | 114 | const double order_decimal = pow(10.0, order); |
ccdd3ef5 | 115 | |
3f509c1f | 116 | unsigned int unit = 0; |
ccdd3ef5 | 117 | |
3f509c1f JH |
118 | do |
119 | { | |
120 | tick_period = order_decimal * ScaleUnits[unit++]; | |
121 | } while (tick_period < min_period && unit < countof(ScaleUnits)); | |
ccdd3ef5 | 122 | |
3f509c1f JH |
123 | prefix = (order - FirstSIPrefixPower) / 3; |
124 | assert(prefix < countof(SIPrefixes)); | |
ccdd3ef5 | 125 | |
3f509c1f JH |
126 | |
127 | typical_width = p.boundingRect(0, 0, INT_MAX, INT_MAX, | |
128 | AlignLeft | AlignTop, format_time(_view.offset(), | |
3a6fe081 | 129 | prefix)).width() + MinValueSpacing; |
3f509c1f JH |
130 | |
131 | min_width += SpacingIncrement; | |
132 | ||
133 | } while(typical_width > tick_period / _view.scale()); | |
1b5813fe | 134 | |
ccdd3ef5 | 135 | const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX, |
3af62a24 | 136 | AlignLeft | AlignTop, "8").height(); |
ccdd3ef5 JH |
137 | |
138 | // Draw the tick marks | |
d2caed8d | 139 | p.setPen(palette().color(foregroundRole())); |
ccdd3ef5 JH |
140 | |
141 | const double minor_tick_period = tick_period / MinorTickSubdivision; | |
142 | const double first_major_division = | |
143 | floor(_view.offset() / tick_period); | |
144 | const double first_minor_division = | |
145 | ceil(_view.offset() / minor_tick_period); | |
146 | const double t0 = first_major_division * tick_period; | |
147 | ||
148 | int division = (int)round(first_minor_division - | |
64b678ba | 149 | first_major_division * MinorTickSubdivision) - 1; |
f260e3bf JH |
150 | |
151 | const int major_tick_y1 = text_height + ValueMargin * 2; | |
152 | const int tick_y2 = height(); | |
153 | const int minor_tick_y1 = (major_tick_y1 + tick_y2) / 2; | |
154 | ||
64b678ba | 155 | double x; |
ccdd3ef5 | 156 | |
64b678ba JH |
157 | do { |
158 | const double t = t0 + division * minor_tick_period; | |
159 | x = (t - _view.offset()) / _view.scale(); | |
ccdd3ef5 | 160 | |
333d5bbc | 161 | if (division % MinorTickSubdivision == 0) |
ccdd3ef5 JH |
162 | { |
163 | // Draw a major tick | |
f260e3bf JH |
164 | p.drawText(x, ValueMargin, 0, text_height, |
165 | AlignCenter | AlignTop | TextDontClip, | |
3a6fe081 | 166 | format_time(t, prefix)); |
f260e3bf JH |
167 | p.drawLine(QPointF(x, major_tick_y1), |
168 | QPointF(x, tick_y2)); | |
ccdd3ef5 JH |
169 | } |
170 | else | |
171 | { | |
172 | // Draw a minor tick | |
f260e3bf JH |
173 | p.drawLine(QPointF(x, minor_tick_y1), |
174 | QPointF(x, tick_y2)); | |
ccdd3ef5 JH |
175 | } |
176 | ||
177 | division++; | |
64b678ba JH |
178 | |
179 | } while (x < width()); | |
ccdd3ef5 | 180 | |
f76af637 | 181 | // Draw the cursors |
332afa74 JH |
182 | if (_view.cursors_shown()) |
183 | _view.cursors().draw_markers(p, rect(), prefix); | |
f76af637 | 184 | |
b3a7c013 JH |
185 | // Draw the hover mark |
186 | draw_hover_mark(p); | |
187 | ||
ccdd3ef5 JH |
188 | p.end(); |
189 | } | |
190 | ||
ca4ec3ea JH |
191 | void Ruler::mouseMoveEvent(QMouseEvent *e) |
192 | { | |
4030e03d JH |
193 | if (!(e->buttons() & Qt::LeftButton)) |
194 | return; | |
195 | ||
196 | if ((e->pos() - _mouse_down_point).manhattanLength() < | |
197 | QApplication::startDragDistance()) | |
198 | return; | |
199 | ||
200 | _dragging = true; | |
201 | ||
58864c5c JH |
202 | if (shared_ptr<TimeMarker> m = _grabbed_marker.lock()) |
203 | m->set_time(_view.offset() + | |
204 | ((double)e->x() + 0.5) * _view.scale()); | |
ca4ec3ea JH |
205 | } |
206 | ||
207 | void Ruler::mousePressEvent(QMouseEvent *e) | |
208 | { | |
4030e03d JH |
209 | if (e->buttons() & Qt::LeftButton) |
210 | { | |
211 | _mouse_down_point = e->pos(); | |
212 | ||
58864c5c | 213 | _grabbed_marker.reset(); |
ca4ec3ea | 214 | |
17348f85 JH |
215 | clear_selection(); |
216 | ||
333d5bbc | 217 | if (_view.cursors_shown()) { |
b42d25c4 | 218 | CursorPair &cursors = _view.cursors(); |
58864c5c | 219 | if (cursors.first()->get_label_rect( |
ca4ec3ea | 220 | rect()).contains(e->pos())) |
58864c5c JH |
221 | _grabbed_marker = cursors.first(); |
222 | else if (cursors.second()->get_label_rect( | |
ca4ec3ea | 223 | rect()).contains(e->pos())) |
58864c5c | 224 | _grabbed_marker = cursors.second(); |
ca4ec3ea | 225 | } |
b2a53645 | 226 | |
58864c5c JH |
227 | if (shared_ptr<TimeMarker> m = _grabbed_marker.lock()) |
228 | m->select(); | |
17348f85 | 229 | |
b2a53645 | 230 | selection_changed(); |
ca4ec3ea JH |
231 | } |
232 | } | |
233 | ||
234 | void Ruler::mouseReleaseEvent(QMouseEvent *) | |
235 | { | |
a28a212c JH |
236 | using pv::widgets::Popup; |
237 | ||
238 | if (!_dragging) | |
239 | if (shared_ptr<TimeMarker> m = _grabbed_marker.lock()) { | |
240 | Popup *const p = m->create_popup(&_view); | |
241 | p->set_position(mapToGlobal(QPoint(m->get_x(), | |
242 | height())), Popup::Bottom); | |
243 | p->show(); | |
244 | } | |
245 | ||
4030e03d | 246 | _dragging = false; |
58864c5c | 247 | _grabbed_marker.reset(); |
ca4ec3ea JH |
248 | } |
249 | ||
b3a7c013 JH |
250 | void Ruler::draw_hover_mark(QPainter &p) |
251 | { | |
252 | const int x = _view.hover_point().x(); | |
333d5bbc | 253 | |
4030e03d | 254 | if (x == -1 || _dragging) |
b3a7c013 JH |
255 | return; |
256 | ||
257 | p.setPen(QPen(Qt::NoPen)); | |
ad1d8e2b | 258 | p.setBrush(QBrush(palette().color(foregroundRole()))); |
b3a7c013 JH |
259 | |
260 | const int b = height() - 1; | |
261 | const QPointF points[] = { | |
262 | QPointF(x, b), | |
263 | QPointF(x - HoverArrowSize, b - HoverArrowSize), | |
264 | QPointF(x + HoverArrowSize, b - HoverArrowSize) | |
265 | }; | |
266 | p.drawPolygon(points, countof(points)); | |
267 | } | |
268 | ||
269 | void Ruler::hover_point_changed() | |
270 | { | |
271 | update(); | |
272 | } | |
273 | ||
ccdd3ef5 JH |
274 | } // namespace view |
275 | } // namespace pv |