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