TimeMarker: Simplified label_rect
[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
73 void RowItem::animate_to_layout_v_offset()
74 {
75         if (visual_v_offset_ == layout_v_offset_ ||
76                 (v_offset_animation_.endValue() == layout_v_offset_ &&
77                 v_offset_animation_.state() == QAbstractAnimation::Running))
78                 return;
79
80         v_offset_animation_.setDuration(100);
81         v_offset_animation_.setStartValue(visual_v_offset_);
82         v_offset_animation_.setEndValue(layout_v_offset_);
83         v_offset_animation_.setEasingCurve(QEasingCurve::OutQuad);
84         v_offset_animation_.start();
85 }
86
87 RowItemOwner* RowItem::owner() const
88 {
89         return owner_;
90 }
91
92 void RowItem::set_owner(RowItemOwner *owner)
93 {
94         assert(owner_ || owner);
95         v_offset_animation_.stop();
96
97         if (owner_) {
98                 const int owner_offset = owner_->owner_visual_v_offset();
99                 layout_v_offset_ += owner_offset;
100                 visual_v_offset_ += owner_offset;
101         }
102
103         owner_ = owner;
104
105         if (owner_) {
106                 const int owner_offset = owner_->owner_visual_v_offset();
107                 layout_v_offset_ -= owner_offset;
108                 visual_v_offset_ -= owner_offset;
109         }
110 }
111
112 int RowItem::get_visual_y() const
113 {
114         assert(owner_);
115         return visual_v_offset_ + owner_->owner_visual_v_offset();
116 }
117
118 QPoint RowItem::point() const
119 {
120         return QPoint(0, visual_v_offset());
121 }
122
123 void RowItem::hover_point_changed()
124 {
125 }
126
127 } // namespace view
128 } // namespace pv