blob: e0a038a927976370c04830bc8dbc25c50e853117 (
plain)
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
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QGRAPHICSSCENELINEARINDEX_H
#define QGRAPHICSSCENELINEARINDEX_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtWidgets/private/qtwidgetsglobal_p.h>
#include <QtCore/qrect.h>
#include <QtCore/qlist.h>
#include <QtWidgets/qgraphicsitem.h>
#include <private/qgraphicssceneindex_p.h>
QT_REQUIRE_CONFIG(graphicsview);
QT_BEGIN_NAMESPACE
class Q_AUTOTEST_EXPORT QGraphicsSceneLinearIndex : public QGraphicsSceneIndex
{
Q_OBJECT
public:
QGraphicsSceneLinearIndex(QGraphicsScene *scene = nullptr) : QGraphicsSceneIndex(scene), m_numSortedElements(0)
{ }
QList<QGraphicsItem *> items(Qt::SortOrder order = Qt::DescendingOrder) const override
{ Q_UNUSED(order); return m_items; }
virtual QList<QGraphicsItem *> estimateItems(const QRectF &rect, Qt::SortOrder order) const override
{
Q_UNUSED(rect);
Q_UNUSED(order);
return m_items;
}
protected :
virtual void clear() override
{
m_items.clear();
m_numSortedElements = 0;
}
virtual void addItem(QGraphicsItem *item) override
{ m_items << item; }
virtual void removeItem(QGraphicsItem *item) override
{
// Sort m_items if needed
if (m_numSortedElements < m_items.size())
{
std::sort(m_items.begin() + m_numSortedElements, m_items.end() );
std::inplace_merge(m_items.begin(), m_items.begin() + m_numSortedElements, m_items.end());
m_numSortedElements = m_items.size();
}
QList<QGraphicsItem*>::iterator element = std::lower_bound(m_items.begin(), m_items.end(), item);
if (element != m_items.end() && *element == item)
{
m_items.erase(element);
--m_numSortedElements;
}
}
private:
QList<QGraphicsItem*> m_items;
int m_numSortedElements;
};
QT_END_NAMESPACE
#endif // QGRAPHICSSCENELINEARINDEX_H
|
