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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file GUI/View/Overlay/PolygonOverlay.cpp
//! @brief Implements class PolygonOverlay.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "GUI/View/Overlay/PolygonOverlay.h"
#include "Base/Util/Assert.h"
#include "GUI/Model/Mask/MaskItems.h"
#include "GUI/Model/Mask/PointItem.h"
#include "GUI/View/Overlay/OverlayStyle.h"
#include "GUI/View/Overlay/VertexOverlay.h"
#include "GUI/View/Plotter/ColorMap.h"
#include <QCursor>
namespace {
const double bbox_margins = 5; // additional margins around points to form bounding box
} // namespace
PolygonOverlay::PolygonOverlay(PolygonItem* item, ColorMap* plot)
: IMaskOverlay(plot)
, m_item(item)
, m_block_on_point_update(false)
, m_close_polygon_request(false)
{
m_item->maskVisibilityChanged();
}
OverlayItem* PolygonOverlay::parameterizedItem() const
{
return m_item;
}
void PolygonOverlay::addOverlay(IOverlay* child)
{
ASSERT(child);
if (childItems().contains(child))
return;
auto* pointView = dynamic_cast<VertexOverlay*>(child);
ASSERT(pointView);
pointView->setParentItem(this);
// polygon consisting from more than 2 points can be closed via hover event by clicking
// on first polygon point
if (!isClosedPolygon() && childItems().size() > 2)
childItems()[0]->setAcceptHoverEvents(true);
// during the drawing process the polygon is selected
pointView->setVisible(isSelected());
update_polygon();
connect(pointView, &VertexOverlay::propertyChanged, this, &PolygonOverlay::update_view);
connect(pointView, &VertexOverlay::closePolygonRequest, this,
&PolygonOverlay::onClosePolygonRequest);
}
//! Returns last added poligon point in scene coordinates
QPointF PolygonOverlay::lastAddedPoint() const
{
return !childItems().empty() ? childItems().back()->scenePos() : QPointF();
}
QPainterPath PolygonOverlay::shape() const
{
QPainterPath path;
path.addPolygon(m_polygon);
path.closeSubpath();
return path;
}
//! Returns true if there was a request to close polygon (emitted by its start point),
//! and then closes a polygon. Returns true if polygon was closed.
bool PolygonOverlay::closePolygonIfNecessary()
{
if (m_close_polygon_request) {
for (QGraphicsItem* childItem : childItems()) {
childItem->setFlag(QGraphicsItem::ItemIsMovable);
childItem->setFlag(QGraphicsItem::ItemSendsGeometryChanges);
childItem->setAcceptHoverEvents(false);
}
m_item->setIsClosed(true);
update();
}
return isClosedPolygon();
}
void PolygonOverlay::onClosePolygonRequest(bool value)
{
m_close_polygon_request = value;
}
bool PolygonOverlay::isClosedPolygon()
{
return m_item->isClosed();
}
void PolygonOverlay::paint(QPainter* painter, const QStyleOptionGraphicsItem* o, QWidget* w)
{
if (isClosedPolygon())
IMaskOverlay::paint(painter, o, w);
else {
ASSERT(m_item);
const bool mask_value = static_cast<PolygonItem*>(m_item)->maskValue();
painter->setRenderHints(QPainter::Antialiasing);
painter->setPen(GUI::Overlay::getMaskPen(mask_value));
painter->drawPolyline(m_polygon.toPolygon());
}
}
QVariant PolygonOverlay::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant& value)
{
if (change == QGraphicsItem::ItemSelectedHasChanged)
setChildrenVisible(this->isSelected());
return value;
}
void PolygonOverlay::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
{
QGraphicsObject::mouseMoveEvent(event);
update_points();
}
void PolygonOverlay::update_view()
{
update_polygon();
update();
}
//! Runs through all PointItem and calculate bounding rectangle.
//! Determines position of the rectangle in scene.
//! Calculates position of VertexOverlay in local polygon coordinates
void PolygonOverlay::update_polygon()
{
if (m_block_on_point_update)
return;
m_block_on_point_update = true;
if (!m_item->points().isEmpty()) {
m_polygon.clear();
for (auto* point : m_item->points())
m_polygon << QPointF(x2pix(point->posX().dVal()), y2pix(point->posY().dVal()));
const QRectF scene_rect = m_polygon.boundingRect().marginsAdded(
QMarginsF(bbox_margins, bbox_margins, bbox_margins, bbox_margins));
m_bounding_rect = {0.0, 0.0, scene_rect.width(), scene_rect.height()};
setPos(scene_rect.x(), scene_rect.y());
update(); // to propagate changes to scene
m_polygon = mapFromScene(m_polygon);
int index(0);
for (auto* child : childItems())
child->setPos(m_polygon[index++]);
setPos(scene_rect.x(), scene_rect.y());
}
m_block_on_point_update = false;
}
//! When polygon moves as a whole thing across the scene, given method updates coordinates
//! of PointItem's
void PolygonOverlay::update_points()
{
if (m_block_on_point_update)
return;
for (QGraphicsItem* childItem : childItems()) {
auto* view = dynamic_cast<VertexOverlay*>(childItem);
QPointF pos = view->scenePos();
disconnect(view, &VertexOverlay::propertyChanged, this, &PolygonOverlay::update_view);
view->updateParameterizedItem(pos);
connect(view, &VertexOverlay::propertyChanged, this, &PolygonOverlay::update_view,
Qt::UniqueConnection);
}
}
void PolygonOverlay::setChildrenVisible(bool value)
{
for (QGraphicsItem* childItem : childItems())
childItem->setVisible(value);
}
|
