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