1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/***
Olive - Non-Linear Video Editor
Copyright (C) 2019 Olive Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
***/
#include "nodeviewedge.h"
#include <QApplication>
#include <QDebug>
#include <QGraphicsSceneMouseEvent>
#include <QStyleOptionGraphicsItem>
#include "common/clamp.h"
#include "common/lerp.h"
#include "nodeview.h"
#include "nodeviewscene.h"
OLIVE_NAMESPACE_ENTER
NodeViewEdge::NodeViewEdge(QGraphicsItem *parent) :
QGraphicsPathItem(parent),
edge_(nullptr),
connected_(false),
highlighted_(false),
flow_dir_(NodeViewCommon::kLeftToRight),
curved_(true)
{
setFlag(QGraphicsItem::ItemIsSelectable);
// Ensures this UI object is drawn behind other objects
setZValue(-1);
// Use font metrics to set edge width for basic high DPI support
edge_width_ = QFontMetrics(QFont()).height() / 12;
}
void NodeViewEdge::SetEdge(NodeEdgePtr edge)
{
SetConnected(true);
// Set the new edge pointer
edge_ = edge;
// Re-adjust the line positioning for this new edge
Adjust();
}
NodeEdgePtr NodeViewEdge::edge()
{
return edge_;
}
void NodeViewEdge::Adjust()
{
if (!edge_ || !scene()) {
return;
}
// Get the UI objects of both nodes that this edge connects
NodeViewItem* output = static_cast<NodeViewScene*>(scene())->NodeToUIObject(edge_->output()->parentNode());
NodeViewItem* input = static_cast<NodeViewScene*>(scene())->NodeToUIObject(edge_->input()->parentNode());
if (!output || !input) {
return;
}
// Draw a line between the two
SetPoints(output->GetParamPoint(edge_->output(), output->pos()),
input->GetParamPoint(edge_->input(), output->pos()),
input->IsExpanded());
}
void NodeViewEdge::SetConnected(bool c)
{
connected_ = c;
update();
}
void NodeViewEdge::SetHighlighted(bool e)
{
highlighted_ = e;
update();
}
void NodeViewEdge::SetPoints(const QPointF &start, const QPointF &end, bool input_is_expanded)
{
QPainterPath path;
path.moveTo(start);
if (curved_) {
double half_x = lerp(start.x(), end.x(), 0.5);
double half_y = lerp(start.y(), end.y(), 0.5);
QPointF cp1, cp2;
if (NodeViewCommon::GetFlowOrientation(flow_dir_) == Qt::Horizontal) {
cp1 = QPointF(half_x, start.y());
} else {
cp1 = QPointF(start.x(), half_y);
}
if (NodeViewCommon::GetFlowOrientation(flow_dir_) == Qt::Horizontal || input_is_expanded) {
cp2 = QPointF(half_x, end.y());
} else {
cp2 = QPointF(end.x(), half_y);
}
path.cubicTo(cp1, cp2, end);
} else {
path.lineTo(end);
}
setPath(path);
}
void NodeViewEdge::SetFlowDirection(NodeViewCommon::FlowDirection dir)
{
flow_dir_ = dir;
Adjust();
}
void NodeViewEdge::SetCurved(bool e)
{
curved_ = e;
update();
}
void NodeViewEdge::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
{
QPalette::ColorGroup group;
QPalette::ColorRole role;
if (connected_) {
group = QPalette::Active;
} else {
group = QPalette::Disabled;
}
if (highlighted_ != bool(option->state & QStyle::State_Selected)) {
role = QPalette::Highlight;
} else {
role = QPalette::Text;
}
painter->setPen(QPen(qApp->palette().color(group, role), edge_width_));
painter->setBrush(Qt::NoBrush);
painter->drawPath(path());
}
OLIVE_NAMESPACE_EXIT
|
