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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 "cursorheader.hpp" | |
22 | ||
23 | #include "ruler.hpp" | |
24 | #include "view.hpp" | |
25 | ||
26 | #include <QApplication> | |
27 | #include <QFontMetrics> | |
28 | #include <QMouseEvent> | |
29 | ||
30 | #include <pv/widgets/popup.hpp> | |
31 | ||
32 | using std::shared_ptr; | |
33 | using std::vector; | |
34 | ||
35 | namespace pv { | |
36 | namespace view { | |
37 | ||
38 | const int CursorHeader::Padding = 20; | |
39 | const int CursorHeader::BaselineOffset = 5; | |
40 | ||
41 | int CursorHeader::calculateTextHeight() | |
42 | { | |
43 | QFontMetrics fm(font()); | |
44 | return fm.boundingRect(0, 0, INT_MAX, INT_MAX, | |
45 | Qt::AlignLeft | Qt::AlignTop, "8").height(); | |
46 | } | |
47 | ||
48 | CursorHeader::CursorHeader(View &parent) : | |
49 | MarginWidget(parent), | |
50 | dragging_(false), | |
51 | textHeight_(calculateTextHeight()) | |
52 | { | |
53 | setMouseTracking(true); | |
54 | } | |
55 | ||
56 | QSize CursorHeader::sizeHint() const | |
57 | { | |
58 | return QSize(0, textHeight_ + Padding + BaselineOffset); | |
59 | } | |
60 | ||
61 | void CursorHeader::clear_selection() | |
62 | { | |
63 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
64 | for (auto &i : items) | |
65 | i->select(false); | |
66 | update(); | |
67 | } | |
68 | ||
69 | void CursorHeader::paintEvent(QPaintEvent*) | |
70 | { | |
71 | QPainter p(this); | |
72 | p.setRenderHint(QPainter::Antialiasing); | |
73 | ||
74 | // The cursor labels are not drawn with the arrows exactly on the | |
75 | // bottom line of the widget, because then the selection shadow | |
76 | // would be clipped away. | |
77 | const QRect r = rect().adjusted(0, 0, 0, -BaselineOffset); | |
78 | ||
79 | // Draw the cursors | |
80 | if (view_.cursors_shown()) | |
81 | view_.cursors()->draw_markers(p, r); | |
82 | } | |
83 | ||
84 | void CursorHeader::mouseMoveEvent(QMouseEvent *e) | |
85 | { | |
86 | if (!(e->buttons() & Qt::LeftButton)) | |
87 | return; | |
88 | ||
89 | if ((e->pos() - mouse_down_point_).manhattanLength() < | |
90 | QApplication::startDragDistance()) | |
91 | return; | |
92 | ||
93 | dragging_ = true; | |
94 | ||
95 | if (shared_ptr<TimeMarker> m = grabbed_marker_.lock()) | |
96 | m->set_time(view_.offset() + | |
97 | ((double)e->x() + 0.5) * view_.scale()); | |
98 | } | |
99 | ||
100 | void CursorHeader::mousePressEvent(QMouseEvent *e) | |
101 | { | |
102 | if (e->buttons() & Qt::LeftButton) { | |
103 | mouse_down_point_ = e->pos(); | |
104 | ||
105 | grabbed_marker_.reset(); | |
106 | ||
107 | clear_selection(); | |
108 | ||
109 | if (view_.cursors_shown()) { | |
110 | shared_ptr<CursorPair> cursors(view_.cursors()); | |
111 | if (cursors->first()->label_rect( | |
112 | rect()).contains(e->pos())) | |
113 | grabbed_marker_ = cursors->first(); | |
114 | else if (cursors->second()->label_rect( | |
115 | rect()).contains(e->pos())) | |
116 | grabbed_marker_ = cursors->second(); | |
117 | } | |
118 | ||
119 | if (shared_ptr<TimeMarker> m = grabbed_marker_.lock()) | |
120 | m->select(); | |
121 | ||
122 | selection_changed(); | |
123 | } | |
124 | } | |
125 | ||
126 | void CursorHeader::mouseReleaseEvent(QMouseEvent *) | |
127 | { | |
128 | using pv::widgets::Popup; | |
129 | ||
130 | if (!dragging_) | |
131 | if (shared_ptr<TimeMarker> m = grabbed_marker_.lock()) { | |
132 | Popup *const p = m->create_popup(&view_); | |
133 | const QPoint arrpos(m->get_x(), height() - BaselineOffset); | |
134 | p->set_position(mapToGlobal(arrpos), Popup::Bottom); | |
135 | p->show(); | |
136 | } | |
137 | ||
138 | dragging_ = false; | |
139 | grabbed_marker_.reset(); | |
140 | } | |
141 | ||
142 | } // namespace view | |
143 | } // namespace pv |