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