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