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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, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <algorithm> | |
21 | #include <cassert> | |
22 | #include <cmath> | |
23 | #include <limits> | |
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 | #include <QScreen> | |
34 | #include <QWindow> | |
35 | ||
36 | #include <QDebug> | |
37 | ||
38 | using std::abs; | |
39 | using std::back_inserter; | |
40 | using std::copy; | |
41 | using std::dynamic_pointer_cast; | |
42 | using std::none_of; // NOLINT. Used in assert()s. | |
43 | using std::shared_ptr; | |
44 | using std::stable_sort; | |
45 | using std::vector; | |
46 | ||
47 | namespace pv { | |
48 | namespace views { | |
49 | namespace trace { | |
50 | ||
51 | Viewport::Viewport(View &parent) : | |
52 | ViewWidget(parent), | |
53 | pinch_zoom_active_(false) | |
54 | { | |
55 | setAutoFillBackground(true); | |
56 | setBackgroundRole(QPalette::Base); | |
57 | } | |
58 | ||
59 | shared_ptr<ViewItem> Viewport::get_mouse_over_item(const QPoint &pt) | |
60 | { | |
61 | const ViewItemPaintParams pp(rect(), view_.scale(), view_.offset()); | |
62 | const vector< shared_ptr<ViewItem> > items(this->items()); | |
63 | for (auto i = items.rbegin(); i != items.rend(); i++) | |
64 | if ((*i)->enabled() && (*i)->hit_box_rect(pp).contains(pt)) | |
65 | return *i; | |
66 | return nullptr; | |
67 | } | |
68 | ||
69 | void Viewport::item_hover(const shared_ptr<ViewItem> &item, QPoint pos) | |
70 | { | |
71 | if (item && item->is_draggable(pos)) | |
72 | setCursor(dynamic_pointer_cast<ViewItem>(item) ? | |
73 | Qt::SizeHorCursor : Qt::SizeVerCursor); | |
74 | else | |
75 | unsetCursor(); | |
76 | } | |
77 | ||
78 | void Viewport::drag() | |
79 | { | |
80 | drag_offset_ = view_.offset(); | |
81 | drag_v_offset_ = view_.owner_visual_v_offset(); | |
82 | } | |
83 | ||
84 | void Viewport::drag_by(const QPoint &delta) | |
85 | { | |
86 | if (drag_offset_ == boost::none) | |
87 | return; | |
88 | ||
89 | view_.set_scale_offset(view_.scale(), | |
90 | (*drag_offset_ - delta.x() * view_.scale())); | |
91 | ||
92 | view_.set_v_offset(-drag_v_offset_ - delta.y()); | |
93 | } | |
94 | ||
95 | void Viewport::drag_release() | |
96 | { | |
97 | drag_offset_ = boost::none; | |
98 | } | |
99 | ||
100 | vector< shared_ptr<ViewItem> > Viewport::items() | |
101 | { | |
102 | vector< shared_ptr<ViewItem> > items; | |
103 | const vector< shared_ptr<ViewItem> > view_items( | |
104 | view_.list_by_type<ViewItem>()); | |
105 | copy(view_items.begin(), view_items.end(), back_inserter(items)); | |
106 | const vector< shared_ptr<TimeItem> > time_items(view_.time_items()); | |
107 | copy(time_items.begin(), time_items.end(), back_inserter(items)); | |
108 | return items; | |
109 | } | |
110 | ||
111 | bool Viewport::touch_event(QTouchEvent *event) | |
112 | { | |
113 | QList<QTouchEvent::TouchPoint> touchPoints = event->touchPoints(); | |
114 | ||
115 | if (touchPoints.count() != 2) { | |
116 | pinch_zoom_active_ = false; | |
117 | return false; | |
118 | } | |
119 | if (event->device()->type() == QTouchDevice::TouchPad) { | |
120 | return false; | |
121 | } | |
122 | ||
123 | const QTouchEvent::TouchPoint &touchPoint0 = touchPoints.first(); | |
124 | const QTouchEvent::TouchPoint &touchPoint1 = touchPoints.last(); | |
125 | ||
126 | if (!pinch_zoom_active_ || | |
127 | (event->touchPointStates() & Qt::TouchPointPressed)) { | |
128 | pinch_offset0_ = (view_.offset() + view_.scale() * touchPoint0.pos().x()).convert_to<double>(); | |
129 | pinch_offset1_ = (view_.offset() + view_.scale() * touchPoint1.pos().x()).convert_to<double>(); | |
130 | pinch_zoom_active_ = true; | |
131 | } | |
132 | ||
133 | double w = touchPoint1.pos().x() - touchPoint0.pos().x(); | |
134 | if (abs(w) >= 1.0) { | |
135 | const double scale = | |
136 | fabs((pinch_offset1_ - pinch_offset0_) / w); | |
137 | double offset = pinch_offset0_ - touchPoint0.pos().x() * scale; | |
138 | if (scale > 0) | |
139 | view_.set_scale_offset(scale, offset); | |
140 | } | |
141 | ||
142 | if (event->touchPointStates() & Qt::TouchPointReleased) { | |
143 | pinch_zoom_active_ = false; | |
144 | ||
145 | if (touchPoint0.state() & Qt::TouchPointReleased) { | |
146 | // Primary touch released | |
147 | drag_release(); | |
148 | } else { | |
149 | // Update the mouse down fields so that continued | |
150 | // dragging with the primary touch will work correctly | |
151 | mouse_down_point_ = touchPoint0.pos().toPoint(); | |
152 | drag(); | |
153 | } | |
154 | } | |
155 | ||
156 | return true; | |
157 | } | |
158 | ||
159 | void Viewport::paintEvent(QPaintEvent*) | |
160 | { | |
161 | typedef void (ViewItem::*LayerPaintFunc)( | |
162 | QPainter &p, ViewItemPaintParams &pp); | |
163 | LayerPaintFunc layer_paint_funcs[] = { | |
164 | &ViewItem::paint_back, &ViewItem::paint_mid, | |
165 | &ViewItem::paint_fore, nullptr}; | |
166 | ||
167 | vector< shared_ptr<ViewItem> > row_items(view_.list_by_type<ViewItem>()); | |
168 | assert(none_of(row_items.begin(), row_items.end(), | |
169 | [](const shared_ptr<ViewItem> &r) { return !r; })); | |
170 | ||
171 | stable_sort(row_items.begin(), row_items.end(), | |
172 | [](const shared_ptr<ViewItem> &a, const shared_ptr<ViewItem> &b) { | |
173 | return a->drag_point(QRect()).y() < b->drag_point(QRect()).y(); }); | |
174 | ||
175 | const vector< shared_ptr<TimeItem> > time_items(view_.time_items()); | |
176 | assert(none_of(time_items.begin(), time_items.end(), | |
177 | [](const shared_ptr<TimeItem> &t) { return !t; })); | |
178 | ||
179 | QPainter p(this); | |
180 | ||
181 | // Disable antialiasing for high-DPI displays | |
182 | bool use_antialiasing = | |
183 | window()->windowHandle()->screen()->devicePixelRatio() < 2.0; | |
184 | p.setRenderHint(QPainter::Antialiasing, use_antialiasing); | |
185 | ||
186 | for (LayerPaintFunc *paint_func = layer_paint_funcs; | |
187 | *paint_func; paint_func++) { | |
188 | ViewItemPaintParams time_pp(rect(), view_.scale(), view_.offset()); | |
189 | for (const shared_ptr<TimeItem>& t : time_items) | |
190 | (t.get()->*(*paint_func))(p, time_pp); | |
191 | ||
192 | ViewItemPaintParams row_pp(rect(), view_.scale(), view_.offset()); | |
193 | for (const shared_ptr<ViewItem>& r : row_items) | |
194 | (r.get()->*(*paint_func))(p, row_pp); | |
195 | } | |
196 | ||
197 | p.end(); | |
198 | } | |
199 | ||
200 | void Viewport::mouseDoubleClickEvent(QMouseEvent *event) | |
201 | { | |
202 | assert(event); | |
203 | ||
204 | if (event->buttons() & Qt::LeftButton) | |
205 | view_.zoom(2.0, event->x()); | |
206 | else if (event->buttons() & Qt::RightButton) | |
207 | view_.zoom(-2.0, event->x()); | |
208 | } | |
209 | ||
210 | void Viewport::wheelEvent(QWheelEvent *event) | |
211 | { | |
212 | assert(event); | |
213 | ||
214 | if (event->orientation() == Qt::Vertical) { | |
215 | if (event->modifiers() & Qt::ControlModifier) { | |
216 | // Vertical scrolling with the control key pressed | |
217 | // is intrepretted as vertical scrolling | |
218 | view_.set_v_offset(-view_.owner_visual_v_offset() - | |
219 | (event->delta() * height()) / (8 * 120)); | |
220 | } else { | |
221 | // Vertical scrolling is interpreted as zooming in/out | |
222 | view_.zoom(event->delta() / 120.0, event->x()); | |
223 | } | |
224 | } else if (event->orientation() == Qt::Horizontal) { | |
225 | // Horizontal scrolling is interpreted as moving left/right | |
226 | view_.set_scale_offset(view_.scale(), | |
227 | event->delta() * view_.scale() + view_.offset()); | |
228 | } | |
229 | } | |
230 | ||
231 | } // namespace trace | |
232 | } // namespace views | |
233 | } // namespace pv |