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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 <extdef.h> | |
22 | ||
23 | #include <QApplication> | |
24 | #include <QFontMetrics> | |
25 | #include <QMouseEvent> | |
26 | ||
27 | #include "ruler.hpp" | |
28 | #include "view.hpp" | |
29 | ||
30 | #include <pv/util.hpp> | |
31 | #include <pv/widgets/popup.hpp> | |
32 | ||
33 | using namespace Qt; | |
34 | ||
35 | using std::shared_ptr; | |
36 | using std::vector; | |
37 | ||
38 | namespace pv { | |
39 | namespace view { | |
40 | ||
41 | const float Ruler::RulerHeight = 2.5f; // x Text Height | |
42 | const int Ruler::MinorTickSubdivision = 4; | |
43 | ||
44 | const float Ruler::HoverArrowSize = 0.5f; // x Text Height | |
45 | ||
46 | const int Ruler::Padding = 20; | |
47 | ||
48 | Ruler::Ruler(View &parent) : | |
49 | MarginWidget(parent) | |
50 | { | |
51 | setMouseTracking(true); | |
52 | ||
53 | connect(&view_, SIGNAL(hover_point_changed()), | |
54 | this, SLOT(hover_point_changed())); | |
55 | } | |
56 | ||
57 | void Ruler::clear_selection() | |
58 | { | |
59 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
60 | for (auto &i : items) | |
61 | i->select(false); | |
62 | update(); | |
63 | } | |
64 | ||
65 | QSize Ruler::sizeHint() const | |
66 | { | |
67 | const int text_height = calculate_text_height(); | |
68 | return QSize(0, RulerHeight * text_height); | |
69 | } | |
70 | ||
71 | QSize Ruler::extended_size_hint() const | |
72 | { | |
73 | const int text_height = calculate_text_height(); | |
74 | return QSize(0, RulerHeight * text_height + | |
75 | (text_height + Padding + ViewItem::HighlightRadius) / 2); | |
76 | } | |
77 | ||
78 | void Ruler::paintEvent(QPaintEvent*) | |
79 | { | |
80 | const int ValueMargin = 3; | |
81 | ||
82 | QPainter p(this); | |
83 | p.setRenderHint(QPainter::Antialiasing); | |
84 | ||
85 | const double tick_period = view_.tick_period(); | |
86 | const unsigned int prefix = view_.tick_prefix(); | |
87 | ||
88 | // Draw the tick marks | |
89 | p.setPen(palette().color(foregroundRole())); | |
90 | ||
91 | const double minor_tick_period = tick_period / MinorTickSubdivision; | |
92 | const double first_major_division = | |
93 | floor(view_.offset() / tick_period); | |
94 | const double first_minor_division = | |
95 | ceil(view_.offset() / minor_tick_period); | |
96 | const double t0 = first_major_division * tick_period; | |
97 | ||
98 | int division = (int)round(first_minor_division - | |
99 | first_major_division * MinorTickSubdivision) - 1; | |
100 | ||
101 | const int text_height = calculate_text_height(); | |
102 | const int ruler_height = RulerHeight * text_height; | |
103 | const int major_tick_y1 = text_height + ValueMargin * 2; | |
104 | const int minor_tick_y1 = (major_tick_y1 + ruler_height) / 2; | |
105 | ||
106 | double x; | |
107 | ||
108 | do { | |
109 | const double t = t0 + division * minor_tick_period; | |
110 | x = (t - view_.offset()) / view_.scale(); | |
111 | ||
112 | if (division % MinorTickSubdivision == 0) | |
113 | { | |
114 | // Draw a major tick | |
115 | p.drawText(x, ValueMargin, 0, text_height, | |
116 | AlignCenter | AlignTop | TextDontClip, | |
117 | pv::util::format_time(t, prefix)); | |
118 | p.drawLine(QPointF(x, major_tick_y1), | |
119 | QPointF(x, ruler_height)); | |
120 | } | |
121 | else | |
122 | { | |
123 | // Draw a minor tick | |
124 | p.drawLine(QPointF(x, minor_tick_y1), | |
125 | QPointF(x, ruler_height)); | |
126 | } | |
127 | ||
128 | division++; | |
129 | ||
130 | } while (x < width()); | |
131 | ||
132 | // Draw the hover mark | |
133 | draw_hover_mark(p, text_height); | |
134 | ||
135 | // The cursor labels are not drawn with the arrows exactly on the | |
136 | // bottom line of the widget, because then the selection shadow | |
137 | // would be clipped away. | |
138 | const QRect r = rect().adjusted(0, 0, 0, -ViewItem::HighlightRadius); | |
139 | ||
140 | // Draw the items | |
141 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
142 | for (auto &i : items) { | |
143 | const bool highlight = !dragging_ && | |
144 | i->label_rect(r).contains(mouse_point_); | |
145 | i->paint_label(p, r, highlight); | |
146 | } | |
147 | } | |
148 | ||
149 | void Ruler::mouseMoveEvent(QMouseEvent *e) | |
150 | { | |
151 | mouse_point_ = e->pos(); | |
152 | ||
153 | if (!(e->buttons() & Qt::LeftButton)) | |
154 | return; | |
155 | ||
156 | if ((e->pos() - mouse_down_point_).manhattanLength() < | |
157 | QApplication::startDragDistance()) | |
158 | return; | |
159 | ||
160 | // Do the drag | |
161 | dragging_ = true; | |
162 | ||
163 | const int delta = e->pos().x() - mouse_down_point_.x(); | |
164 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
165 | for (auto &i : items) | |
166 | if (i->dragging()) | |
167 | i->set_time(view_.offset() + | |
168 | (i->drag_point().x() + delta - 0.5) * | |
169 | view_.scale()); | |
170 | } | |
171 | ||
172 | void Ruler::mousePressEvent(QMouseEvent *e) | |
173 | { | |
174 | if (e->buttons() & Qt::LeftButton) { | |
175 | mouse_down_point_ = e->pos(); | |
176 | ||
177 | mouse_down_item_.reset(); | |
178 | ||
179 | clear_selection(); | |
180 | ||
181 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
182 | for (auto i = items.rbegin(); i != items.rend(); i++) | |
183 | if ((*i)->label_rect(rect()).contains(e->pos())) { | |
184 | mouse_down_item_ = (*i); | |
185 | break; | |
186 | } | |
187 | ||
188 | if (mouse_down_item_) { | |
189 | mouse_down_item_->select(); | |
190 | mouse_down_item_->drag(); | |
191 | } | |
192 | ||
193 | selection_changed(); | |
194 | } | |
195 | } | |
196 | ||
197 | void Ruler::mouseReleaseEvent(QMouseEvent *) | |
198 | { | |
199 | using pv::widgets::Popup; | |
200 | ||
201 | if (!dragging_ && mouse_down_item_) { | |
202 | Popup *const p = mouse_down_item_->create_popup(&view_); | |
203 | if (p) { | |
204 | const QPoint arrpos(mouse_down_item_->get_x(), | |
205 | height() - ViewItem::HighlightRadius); | |
206 | p->set_position(mapToGlobal(arrpos), Popup::Bottom); | |
207 | p->show(); | |
208 | } | |
209 | } | |
210 | ||
211 | dragging_ = false; | |
212 | mouse_down_item_.reset(); | |
213 | ||
214 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
215 | for (auto &i : items) | |
216 | i->drag_release(); | |
217 | } | |
218 | ||
219 | void Ruler::leaveEvent(QEvent*) | |
220 | { | |
221 | mouse_point_ = QPoint(-1, -1); | |
222 | update(); | |
223 | } | |
224 | ||
225 | void Ruler::mouseDoubleClickEvent(QMouseEvent *e) | |
226 | { | |
227 | view_.add_flag(view_.offset() + ((double)e->x() + 0.5) * view_.scale()); | |
228 | } | |
229 | ||
230 | void Ruler::keyPressEvent(QKeyEvent *e) | |
231 | { | |
232 | assert(e); | |
233 | ||
234 | if (e->key() == Qt::Key_Delete) | |
235 | { | |
236 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
237 | for (auto &i : items) | |
238 | if (i->selected()) | |
239 | i->delete_pressed(); | |
240 | } | |
241 | } | |
242 | ||
243 | void Ruler::draw_hover_mark(QPainter &p, int text_height) | |
244 | { | |
245 | const int x = view_.hover_point().x(); | |
246 | ||
247 | if (x == -1) | |
248 | return; | |
249 | ||
250 | p.setPen(QPen(Qt::NoPen)); | |
251 | p.setBrush(QBrush(palette().color(foregroundRole()))); | |
252 | ||
253 | const int b = RulerHeight * text_height; | |
254 | const float hover_arrow_size = HoverArrowSize * text_height; | |
255 | const QPointF points[] = { | |
256 | QPointF(x, b), | |
257 | QPointF(x - hover_arrow_size, b - hover_arrow_size), | |
258 | QPointF(x + hover_arrow_size, b - hover_arrow_size) | |
259 | }; | |
260 | p.drawPolygon(points, countof(points)); | |
261 | } | |
262 | ||
263 | int Ruler::calculate_text_height() const | |
264 | { | |
265 | return QFontMetrics(font()).ascent(); | |
266 | } | |
267 | ||
268 | void Ruler::hover_point_changed() | |
269 | { | |
270 | update(); | |
271 | } | |
272 | ||
273 | } // namespace view | |
274 | } // namespace pv |