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