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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 <cassert> | |
22 | #include <cmath> | |
23 | #include <algorithm> | |
24 | ||
25 | #include "signal.hpp" | |
26 | #include "view.hpp" | |
27 | #include "viewitempaintparams.hpp" | |
28 | #include "viewport.hpp" | |
29 | ||
30 | #include <pv/session.hpp> | |
31 | ||
32 | #include <QMouseEvent> | |
33 | ||
34 | using std::abs; | |
35 | using std::max; | |
36 | using std::min; | |
37 | using std::none_of; | |
38 | using std::shared_ptr; | |
39 | using std::stable_sort; | |
40 | using std::vector; | |
41 | ||
42 | namespace pv { | |
43 | namespace view { | |
44 | ||
45 | Viewport::Viewport(View &parent) : | |
46 | ViewWidget(parent), | |
47 | mouse_down_valid_(false), | |
48 | pinch_zoom_active_(false) | |
49 | { | |
50 | setAttribute(Qt::WA_AcceptTouchEvents, true); | |
51 | ||
52 | setAutoFillBackground(true); | |
53 | setBackgroundRole(QPalette::Base); | |
54 | ||
55 | connect(&view_, SIGNAL(signals_moved()), | |
56 | this, SLOT(on_signals_moved())); | |
57 | } | |
58 | ||
59 | void Viewport::paintEvent(QPaintEvent*) | |
60 | { | |
61 | vector< shared_ptr<RowItem> > row_items(view_.begin(), view_.end()); | |
62 | assert(none_of(row_items.begin(), row_items.end(), | |
63 | [](const shared_ptr<RowItem> &r) { return !r; })); | |
64 | ||
65 | stable_sort(row_items.begin(), row_items.end(), | |
66 | [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) { | |
67 | return a->visual_v_offset() < b->visual_v_offset(); }); | |
68 | ||
69 | const vector< shared_ptr<TimeItem> > time_items(view_.time_items()); | |
70 | assert(none_of(time_items.begin(), time_items.end(), | |
71 | [](const shared_ptr<TimeItem> &t) { return !t; })); | |
72 | ||
73 | QPainter p(this); | |
74 | p.setRenderHint(QPainter::Antialiasing); | |
75 | ||
76 | const ViewItemPaintParams pp(rect(), view_.scale(), view_.offset()); | |
77 | ||
78 | for (const shared_ptr<TimeItem> t : time_items) | |
79 | t->paint_back(p, pp); | |
80 | for (const shared_ptr<RowItem> r : row_items) | |
81 | r->paint_back(p, pp); | |
82 | ||
83 | for (const shared_ptr<TimeItem> t : time_items) | |
84 | t->paint_mid(p, pp); | |
85 | for (const shared_ptr<RowItem> r : row_items) | |
86 | r->paint_mid(p, pp); | |
87 | ||
88 | for (const shared_ptr<RowItem> r : row_items) | |
89 | r->paint_fore(p, pp); | |
90 | for (const shared_ptr<TimeItem> t : time_items) | |
91 | t->paint_fore(p, pp); | |
92 | ||
93 | p.end(); | |
94 | } | |
95 | ||
96 | bool Viewport::event(QEvent *event) | |
97 | { | |
98 | switch (event->type()) { | |
99 | case QEvent::TouchBegin: | |
100 | case QEvent::TouchUpdate: | |
101 | case QEvent::TouchEnd: | |
102 | if (touchEvent(static_cast<QTouchEvent *>(event))) | |
103 | return true; | |
104 | break; | |
105 | ||
106 | default: | |
107 | break; | |
108 | } | |
109 | ||
110 | return QWidget::event(event); | |
111 | } | |
112 | ||
113 | void Viewport::mousePressEvent(QMouseEvent *event) | |
114 | { | |
115 | assert(event); | |
116 | ||
117 | if (event->button() == Qt::LeftButton) { | |
118 | mouse_down_point_ = event->pos(); | |
119 | mouse_down_offset_ = view_.offset(); | |
120 | mouse_down_valid_ = true; | |
121 | } | |
122 | } | |
123 | ||
124 | void Viewport::mouseReleaseEvent(QMouseEvent *event) | |
125 | { | |
126 | assert(event); | |
127 | ||
128 | if (event->button() == Qt::LeftButton) | |
129 | mouse_down_valid_ = false; | |
130 | } | |
131 | ||
132 | void Viewport::mouseMoveEvent(QMouseEvent *event) | |
133 | { | |
134 | assert(event); | |
135 | ||
136 | if (event->buttons() & Qt::LeftButton) { | |
137 | if (!mouse_down_valid_) { | |
138 | mouse_down_point_ = event->pos(); | |
139 | mouse_down_offset_ = view_.offset(); | |
140 | mouse_down_valid_ = true; | |
141 | } | |
142 | ||
143 | view_.set_scale_offset(view_.scale(), | |
144 | mouse_down_offset_ + | |
145 | (mouse_down_point_ - event->pos()).x() * | |
146 | view_.scale()); | |
147 | } | |
148 | } | |
149 | ||
150 | void Viewport::mouseDoubleClickEvent(QMouseEvent *event) | |
151 | { | |
152 | assert(event); | |
153 | ||
154 | if (event->buttons() & Qt::LeftButton) | |
155 | view_.zoom(2.0, event->x()); | |
156 | else if (event->buttons() & Qt::RightButton) | |
157 | view_.zoom(-2.0, event->x()); | |
158 | } | |
159 | ||
160 | void Viewport::wheelEvent(QWheelEvent *event) | |
161 | { | |
162 | assert(event); | |
163 | ||
164 | if (event->orientation() == Qt::Vertical) { | |
165 | // Vertical scrolling is interpreted as zooming in/out | |
166 | view_.zoom(event->delta() / 120, event->x()); | |
167 | } else if (event->orientation() == Qt::Horizontal) { | |
168 | // Horizontal scrolling is interpreted as moving left/right | |
169 | view_.set_scale_offset(view_.scale(), | |
170 | event->delta() * view_.scale() | |
171 | + view_.offset()); | |
172 | } | |
173 | } | |
174 | ||
175 | bool Viewport::touchEvent(QTouchEvent *event) | |
176 | { | |
177 | QList<QTouchEvent::TouchPoint> touchPoints = event->touchPoints(); | |
178 | ||
179 | if (touchPoints.count() != 2) { | |
180 | pinch_zoom_active_ = false; | |
181 | return false; | |
182 | } | |
183 | ||
184 | const QTouchEvent::TouchPoint &touchPoint0 = touchPoints.first(); | |
185 | const QTouchEvent::TouchPoint &touchPoint1 = touchPoints.last(); | |
186 | ||
187 | if (!pinch_zoom_active_ || | |
188 | (event->touchPointStates() & Qt::TouchPointPressed)) { | |
189 | pinch_offset0_ = view_.offset() + view_.scale() * touchPoint0.pos().x(); | |
190 | pinch_offset1_ = view_.offset() + view_.scale() * touchPoint1.pos().x(); | |
191 | pinch_zoom_active_ = true; | |
192 | } | |
193 | ||
194 | double w = touchPoint1.pos().x() - touchPoint0.pos().x(); | |
195 | if (abs(w) >= 1.0) { | |
196 | double scale = (pinch_offset1_ - pinch_offset0_) / w; | |
197 | if (scale < 0) | |
198 | scale = -scale; | |
199 | double offset = pinch_offset0_ - touchPoint0.pos().x() * scale; | |
200 | if (scale > 0) | |
201 | view_.set_scale_offset(scale, offset); | |
202 | } | |
203 | ||
204 | if (event->touchPointStates() & Qt::TouchPointReleased) { | |
205 | pinch_zoom_active_ = false; | |
206 | ||
207 | if (touchPoint0.state() & Qt::TouchPointReleased) { | |
208 | // Primary touch released | |
209 | mouse_down_valid_ = false; | |
210 | } else { | |
211 | // Update the mouse down fields so that continued | |
212 | // dragging with the primary touch will work correctly | |
213 | mouse_down_point_ = touchPoint0.pos().toPoint(); | |
214 | mouse_down_offset_ = view_.offset(); | |
215 | mouse_down_valid_ = true; | |
216 | } | |
217 | } | |
218 | ||
219 | return true; | |
220 | } | |
221 | ||
222 | void Viewport::on_signals_moved() | |
223 | { | |
224 | update(); | |
225 | } | |
226 | ||
227 | } // namespace view | |
228 | } // namespace pv |