Use <cmath> in favor of <math.h> everywhere.
[pulseview.git] / pv / view / rowitem.cpp
1 /*
2  * This file is part of the PulseView project.
3  *
4  * Copyright (C) 2013 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 <assert.h>
22
23 #include "view.hpp"
24
25 #include "rowitem.hpp"
26
27 namespace pv {
28 namespace view {
29
30 RowItem::RowItem() :
31         owner_(NULL),
32         layout_v_offset_(0),
33         visual_v_offset_(0),
34         v_offset_animation_(this, "visual_v_offset")
35 {
36 }
37
38 int RowItem::layout_v_offset() const
39 {
40         return layout_v_offset_;
41 }
42
43 void RowItem::set_layout_v_offset(int v_offset)
44 {
45         if (layout_v_offset_ == v_offset)
46                 return;
47
48         layout_v_offset_ = v_offset;
49
50         if (owner_)
51                 owner_->extents_changed(false, true);
52 }
53
54 int RowItem::visual_v_offset() const
55 {
56         return visual_v_offset_;
57 }
58
59 void RowItem::set_visual_v_offset(int v_offset)
60 {
61         visual_v_offset_ = v_offset;
62
63         if (owner_)
64                 owner_->row_item_appearance_changed(true, true);
65 }
66
67 void RowItem::force_to_v_offset(int v_offset)
68 {
69         v_offset_animation_.stop();
70         layout_v_offset_ = visual_v_offset_ = v_offset;
71
72         if (owner_) {
73                 owner_->row_item_appearance_changed(true, true);
74                 owner_->extents_changed(false, true);
75         }
76 }
77
78 void RowItem::animate_to_layout_v_offset()
79 {
80         if (visual_v_offset_ == layout_v_offset_ ||
81                 (v_offset_animation_.endValue() == layout_v_offset_ &&
82                 v_offset_animation_.state() == QAbstractAnimation::Running))
83                 return;
84
85         v_offset_animation_.setDuration(100);
86         v_offset_animation_.setStartValue(visual_v_offset_);
87         v_offset_animation_.setEndValue(layout_v_offset_);
88         v_offset_animation_.setEasingCurve(QEasingCurve::OutQuad);
89         v_offset_animation_.start();
90 }
91
92 RowItemOwner* RowItem::owner() const
93 {
94         return owner_;
95 }
96
97 void RowItem::set_owner(RowItemOwner *owner)
98 {
99         assert(owner_ || owner);
100         v_offset_animation_.stop();
101
102         if (owner_) {
103                 const int owner_offset = owner_->owner_visual_v_offset();
104                 layout_v_offset_ += owner_offset;
105                 visual_v_offset_ += owner_offset;
106         }
107
108         owner_ = owner;
109
110         if (owner_) {
111                 const int owner_offset = owner_->owner_visual_v_offset();
112                 layout_v_offset_ -= owner_offset;
113                 visual_v_offset_ -= owner_offset;
114         }
115 }
116
117 int RowItem::get_visual_y() const
118 {
119         assert(owner_);
120         return visual_v_offset_ + owner_->owner_visual_v_offset();
121 }
122
123 void RowItem::drag_by(const QPoint &delta)
124 {
125         force_to_v_offset(drag_point_.y() + delta.y() -
126                 owner_->owner_visual_v_offset());
127 }
128
129 QPoint RowItem::point(const QRect &rect) const
130 {
131         return QPoint(rect.right(), get_visual_y());
132 }
133
134 void RowItem::hover_point_changed()
135 {
136 }
137
138 } // namespace view
139 } // namespace pv