MainWindow: Make session naming consistent
[pulseview.git] / pv / view / viewport.cpp
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 #include <limits>
25
26 #include "signal.hpp"
27 #include "view.hpp"
28 #include "viewitempaintparams.hpp"
29 #include "viewport.hpp"
30
31 #include <pv/session.hpp>
32
33 #include <QMouseEvent>
34
35 using std::abs;
36 using std::back_inserter;
37 using std::copy;
38 using std::dynamic_pointer_cast;
39 using std::max;
40 using std::min;
41 using std::none_of;
42 using std::numeric_limits;
43 using std::shared_ptr;
44 using std::stable_sort;
45 using std::vector;
46
47 namespace pv {
48 namespace view {
49
50 Viewport::Viewport(View &parent) :
51         ViewWidget(parent),
52         pinch_zoom_active_(false)
53 {
54         setAutoFillBackground(true);
55         setBackgroundRole(QPalette::Base);
56 }
57
58 shared_ptr<ViewItem> Viewport::get_mouse_over_item(const QPoint &pt)
59 {
60         const ViewItemPaintParams pp(rect(), view_.scale(), view_.offset());
61         const vector< shared_ptr<ViewItem> > items(this->items());
62         for (auto i = items.rbegin(); i != items.rend(); i++)
63                 if ((*i)->enabled() &&
64                         (*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)
70 {
71         if (item && item->is_draggable())
72                 setCursor(dynamic_pointer_cast<RowItem>(item) ?
73                         Qt::SizeVerCursor : Qt::SizeHorCursor);
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 std::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
120         const QTouchEvent::TouchPoint &touchPoint0 = touchPoints.first();
121         const QTouchEvent::TouchPoint &touchPoint1 = touchPoints.last();
122
123         if (!pinch_zoom_active_ ||
124             (event->touchPointStates() & Qt::TouchPointPressed)) {
125                 pinch_offset0_ = (view_.offset() + view_.scale() * touchPoint0.pos().x()).convert_to<double>();
126                 pinch_offset1_ = (view_.offset() + view_.scale() * touchPoint1.pos().x()).convert_to<double>();
127                 pinch_zoom_active_ = true;
128         }
129
130         double w = touchPoint1.pos().x() - touchPoint0.pos().x();
131         if (abs(w) >= 1.0) {
132                 const double scale =
133                         fabs((pinch_offset1_ - pinch_offset0_) / w);
134                 double offset = pinch_offset0_ - touchPoint0.pos().x() * scale;
135                 if (scale > 0)
136                         view_.set_scale_offset(scale, offset);
137         }
138
139         if (event->touchPointStates() & Qt::TouchPointReleased) {
140                 pinch_zoom_active_ = false;
141
142                 if (touchPoint0.state() & Qt::TouchPointReleased) {
143                         // Primary touch released
144                         drag_release();
145                 } else {
146                         // Update the mouse down fields so that continued
147                         // dragging with the primary touch will work correctly
148                         mouse_down_point_ = touchPoint0.pos().toPoint();
149                         drag();
150                 }
151         }
152
153         return true;
154 }
155
156 void Viewport::paintEvent(QPaintEvent*)
157 {
158         vector< shared_ptr<RowItem> > row_items(view_.list_by_type<RowItem>());
159         assert(none_of(row_items.begin(), row_items.end(),
160                 [](const shared_ptr<RowItem> &r) { return !r; }));
161
162         stable_sort(row_items.begin(), row_items.end(),
163                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
164                         return a->point(QRect()).y() < b->point(QRect()).y(); });
165
166         const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
167         assert(none_of(time_items.begin(), time_items.end(),
168                 [](const shared_ptr<TimeItem> &t) { return !t; }));
169
170         QPainter p(this);
171         p.setRenderHint(QPainter::Antialiasing);
172
173         const ViewItemPaintParams pp(rect(), view_.scale(), view_.offset());
174
175         for (const shared_ptr<TimeItem> t : time_items)
176                 t->paint_back(p, pp);
177         for (const shared_ptr<RowItem> r : row_items)
178                 r->paint_back(p, pp);
179
180         for (const shared_ptr<TimeItem> t : time_items)
181                 t->paint_mid(p, pp);
182         for (const shared_ptr<RowItem> r : row_items)
183                 r->paint_mid(p, pp);
184
185         for (const shared_ptr<RowItem> r : row_items)
186                 r->paint_fore(p, pp);
187
188         p.setRenderHint(QPainter::Antialiasing, false);
189         for (const shared_ptr<TimeItem> t : time_items)
190                 t->paint_fore(p, pp);
191
192         p.end();
193 }
194
195 void Viewport::mouseDoubleClickEvent(QMouseEvent *event)
196 {
197         assert(event);
198
199         if (event->buttons() & Qt::LeftButton)
200                 view_.zoom(2.0, event->x());
201         else if (event->buttons() & Qt::RightButton)
202                 view_.zoom(-2.0, event->x());
203 }
204
205 void Viewport::wheelEvent(QWheelEvent *event)
206 {
207         assert(event);
208
209         if (event->orientation() == Qt::Vertical) {
210                 if (event->modifiers() & Qt::ControlModifier) {
211                         // Vertical scrolling with the control key pressed
212                         // is intrepretted as vertical scrolling
213                         view_.set_v_offset(-view_.owner_visual_v_offset() -
214                                 (event->delta() * height()) / (8 * 120));
215                 } else {
216                         // Vertical scrolling is interpreted as zooming in/out
217                         view_.zoom(event->delta() / 120, event->x());
218                 }
219         } else if (event->orientation() == Qt::Horizontal) {
220                 // Horizontal scrolling is interpreted as moving left/right
221                 view_.set_scale_offset(view_.scale(),
222                         event->delta() * view_.scale() + view_.offset());
223         }
224 }
225
226 } // namespace view
227 } // namespace pv