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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> | |
31 | ||
b3a7c013 | 32 | #include <QMouseEvent> |
ccdd3ef5 JH |
33 | #include <QPainter> |
34 | #include <QTextStream> | |
35 | ||
f76af637 JH |
36 | using namespace std; |
37 | ||
ccdd3ef5 JH |
38 | namespace pv { |
39 | namespace view { | |
40 | ||
41 | const int Ruler::MinorTickSubdivision = 4; | |
42 | const int Ruler::ScaleUnits[3] = {1, 2, 5}; | |
43 | ||
44 | const QString Ruler::SIPrefixes[9] = | |
45 | {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"}; | |
46 | const int Ruler::FirstSIPrefixPower = -15; | |
47 | ||
b3a7c013 JH |
48 | const int Ruler::HoverArrowSize = 5; |
49 | ||
ccdd3ef5 JH |
50 | Ruler::Ruler(View &parent) : |
51 | QWidget(&parent), | |
ca4ec3ea JH |
52 | _view(parent), |
53 | _grabbed_marker(NULL) | |
ccdd3ef5 | 54 | { |
b3a7c013 JH |
55 | setMouseTracking(true); |
56 | ||
57 | connect(&_view, SIGNAL(hover_point_changed()), | |
58 | this, SLOT(hover_point_changed())); | |
ccdd3ef5 JH |
59 | } |
60 | ||
61 | void Ruler::paintEvent(QPaintEvent *event) | |
62 | { | |
63 | QPainter p(this); | |
ce6e73a8 | 64 | p.setRenderHint(QPainter::Antialiasing); |
ccdd3ef5 JH |
65 | |
66 | const double MinSpacing = 80; | |
67 | ||
68 | const double min_period = _view.scale() * MinSpacing; | |
69 | ||
70 | const int order = (int)floorf(log10f(min_period)); | |
71 | const double order_decimal = pow(10, order); | |
72 | ||
cfa7293b | 73 | unsigned int unit = 0; |
ccdd3ef5 JH |
74 | double tick_period = 0.0f; |
75 | ||
76 | do | |
77 | { | |
78 | tick_period = order_decimal * ScaleUnits[unit++]; | |
333d5bbc | 79 | } while (tick_period < min_period && unit < countof(ScaleUnits)); |
ccdd3ef5 | 80 | |
cfa7293b | 81 | const unsigned int prefix = (order - FirstSIPrefixPower) / 3; |
ccdd3ef5 JH |
82 | assert(prefix >= 0); |
83 | assert(prefix < countof(SIPrefixes)); | |
84 | ||
397c9541 | 85 | const double multiplier = pow(10.0, - prefix * 3 - FirstSIPrefixPower); |
1b5813fe | 86 | |
ccdd3ef5 JH |
87 | const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX, |
88 | Qt::AlignLeft | Qt::AlignTop, "8").height(); | |
89 | ||
90 | // Draw the tick marks | |
91 | p.setPen(Qt::black); | |
92 | ||
93 | const double minor_tick_period = tick_period / MinorTickSubdivision; | |
94 | const double first_major_division = | |
95 | floor(_view.offset() / tick_period); | |
96 | const double first_minor_division = | |
97 | ceil(_view.offset() / minor_tick_period); | |
98 | const double t0 = first_major_division * tick_period; | |
99 | ||
100 | int division = (int)round(first_minor_division - | |
101 | first_major_division * MinorTickSubdivision); | |
333d5bbc | 102 | while (1) |
ccdd3ef5 JH |
103 | { |
104 | const double t = t0 + division * minor_tick_period; | |
105 | const double x = (t - _view.offset()) / _view.scale(); | |
106 | ||
333d5bbc | 107 | if (x >= width()) |
ccdd3ef5 JH |
108 | break; |
109 | ||
333d5bbc | 110 | if (division % MinorTickSubdivision == 0) |
ccdd3ef5 JH |
111 | { |
112 | // Draw a major tick | |
113 | QString s; | |
114 | QTextStream ts(&s); | |
1b5813fe | 115 | ts << (t * multiplier) << SIPrefixes[prefix] << "s"; |
ccdd3ef5 JH |
116 | p.drawText(x, 0, 0, text_height, Qt::AlignCenter | |
117 | Qt::AlignTop | Qt::TextDontClip, s); | |
ce6e73a8 JH |
118 | p.drawLine(QPointF(x, text_height), |
119 | QPointF(x, height())); | |
ccdd3ef5 JH |
120 | } |
121 | else | |
122 | { | |
123 | // Draw a minor tick | |
ce6e73a8 JH |
124 | p.drawLine(QPointF(x, (text_height + height()) / 2), |
125 | QPointF(x, height())); | |
ccdd3ef5 JH |
126 | } |
127 | ||
128 | division++; | |
129 | } | |
130 | ||
f76af637 JH |
131 | // Draw the cursors |
132 | draw_cursors(p); | |
133 | ||
b3a7c013 JH |
134 | // Draw the hover mark |
135 | draw_hover_mark(p); | |
136 | ||
ccdd3ef5 JH |
137 | p.end(); |
138 | } | |
139 | ||
ca4ec3ea JH |
140 | void Ruler::mouseMoveEvent(QMouseEvent *e) |
141 | { | |
333d5bbc | 142 | if (!_grabbed_marker) |
ca4ec3ea JH |
143 | return; |
144 | ||
145 | _grabbed_marker->set_time(_view.offset() + | |
146 | ((double)e->x() + 0.5) * _view.scale()); | |
147 | } | |
148 | ||
149 | void Ruler::mousePressEvent(QMouseEvent *e) | |
150 | { | |
333d5bbc | 151 | if (e->buttons() & Qt::LeftButton) { |
ca4ec3ea JH |
152 | _grabbed_marker = NULL; |
153 | ||
333d5bbc | 154 | if (_view.cursors_shown()) { |
ca4ec3ea JH |
155 | std::pair<Cursor, Cursor> &cursors = |
156 | _view.cursors(); | |
333d5bbc | 157 | if (cursors.first.get_label_rect( |
ca4ec3ea JH |
158 | rect()).contains(e->pos())) |
159 | _grabbed_marker = &cursors.first; | |
333d5bbc | 160 | else if (cursors.second.get_label_rect( |
ca4ec3ea JH |
161 | rect()).contains(e->pos())) |
162 | _grabbed_marker = &cursors.second; | |
163 | } | |
164 | } | |
165 | } | |
166 | ||
167 | void Ruler::mouseReleaseEvent(QMouseEvent *) | |
168 | { | |
169 | _grabbed_marker = NULL; | |
170 | } | |
171 | ||
f76af637 JH |
172 | void Ruler::draw_cursors(QPainter &p) |
173 | { | |
333d5bbc | 174 | if (!_view.cursors_shown()) |
f76af637 JH |
175 | return; |
176 | ||
177 | const QRect r = rect(); | |
178 | pair<Cursor, Cursor> &cursors = _view.cursors(); | |
179 | cursors.first.paint_label(p, r); | |
180 | cursors.second.paint_label(p, r); | |
181 | } | |
182 | ||
b3a7c013 JH |
183 | void Ruler::draw_hover_mark(QPainter &p) |
184 | { | |
185 | const int x = _view.hover_point().x(); | |
333d5bbc UH |
186 | |
187 | if (x == -1 || _grabbed_marker) | |
b3a7c013 JH |
188 | return; |
189 | ||
190 | p.setPen(QPen(Qt::NoPen)); | |
191 | p.setBrush(QBrush(QColor(Qt::black))); | |
192 | ||
193 | const int b = height() - 1; | |
194 | const QPointF points[] = { | |
195 | QPointF(x, b), | |
196 | QPointF(x - HoverArrowSize, b - HoverArrowSize), | |
197 | QPointF(x + HoverArrowSize, b - HoverArrowSize) | |
198 | }; | |
199 | p.drawPolygon(points, countof(points)); | |
200 | } | |
201 | ||
202 | void Ruler::hover_point_changed() | |
203 | { | |
204 | update(); | |
205 | } | |
206 | ||
ccdd3ef5 JH |
207 | } // namespace view |
208 | } // namespace pv |