AnalogSignal: Use setting change handler for threshold display
[pulseview.git] / pv / views / trace / tracetreeitem.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, see <http://www.gnu.org/licenses/>.
18  */
19
20 #include <cassert>
21
22 #include "view.hpp"
23
24 #include "tracetreeitem.hpp"
25
26 namespace pv {
27 namespace views {
28 namespace trace {
29
30 TraceTreeItem::TraceTreeItem() :
31         owner_(nullptr),
32         layout_v_offset_(0),
33         visual_v_offset_(0),
34         v_offset_animation_(this, "visual_v_offset")
35 {
36 }
37
38 void TraceTreeItem::select(bool select)
39 {
40         ViewItem::select(select);
41         owner_->row_item_appearance_changed(true, true);
42 }
43
44 int TraceTreeItem::layout_v_offset() const
45 {
46         return layout_v_offset_;
47 }
48
49 void TraceTreeItem::set_layout_v_offset(int v_offset)
50 {
51         if (layout_v_offset_ == v_offset)
52                 return;
53
54         layout_v_offset_ = v_offset;
55
56         if (owner_)
57                 owner_->extents_changed(false, true);
58 }
59
60 int TraceTreeItem::visual_v_offset() const
61 {
62         return visual_v_offset_;
63 }
64
65 void TraceTreeItem::set_visual_v_offset(int v_offset)
66 {
67         visual_v_offset_ = v_offset;
68
69         if (owner_)
70                 owner_->row_item_appearance_changed(true, true);
71 }
72
73 void TraceTreeItem::force_to_v_offset(int v_offset)
74 {
75         v_offset_animation_.stop();
76         layout_v_offset_ = visual_v_offset_ = v_offset;
77
78         if (owner_) {
79                 owner_->row_item_appearance_changed(true, true);
80                 owner_->extents_changed(false, true);
81         }
82 }
83
84 void TraceTreeItem::animate_to_layout_v_offset()
85 {
86         if (visual_v_offset_ == layout_v_offset_ ||
87                 (v_offset_animation_.endValue() == layout_v_offset_ &&
88                 v_offset_animation_.state() == QAbstractAnimation::Running))
89                 return;
90
91         v_offset_animation_.setDuration(100);
92         v_offset_animation_.setStartValue(visual_v_offset_);
93         v_offset_animation_.setEndValue(layout_v_offset_);
94         v_offset_animation_.setEasingCurve(QEasingCurve::OutQuad);
95         v_offset_animation_.start();
96 }
97
98 TraceTreeItemOwner* TraceTreeItem::owner() const
99 {
100         return owner_;
101 }
102
103 void TraceTreeItem::set_owner(TraceTreeItemOwner *owner)
104 {
105         assert(owner_ || owner);
106         v_offset_animation_.stop();
107
108         if (owner_) {
109                 const int owner_offset = owner_->owner_visual_v_offset();
110                 layout_v_offset_ += owner_offset;
111                 visual_v_offset_ += owner_offset;
112         }
113
114         owner_ = owner;
115
116         if (owner_) {
117                 const int owner_offset = owner_->owner_visual_v_offset();
118                 layout_v_offset_ -= owner_offset;
119                 visual_v_offset_ -= owner_offset;
120         }
121 }
122
123 int TraceTreeItem::get_visual_y() const
124 {
125         assert(owner_);
126         return visual_v_offset_ + owner_->owner_visual_v_offset();
127 }
128
129 void TraceTreeItem::drag_by(const QPoint &delta)
130 {
131         assert(owner_);
132         force_to_v_offset(drag_point_.y() + delta.y() -
133                 owner_->owner_visual_v_offset());
134 }
135
136 QPoint TraceTreeItem::drag_point(const QRect &rect) const
137 {
138         return QPoint(rect.right(), get_visual_y());
139 }
140
141 } // namespace trace
142 } // namespace views
143 } // namespace pv