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
|
/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick Layouts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#ifndef QQUICKGRIDLAYOUTENGINE_P_H
#define QQUICKGRIDLAYOUTENGINE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of the graphics view layout classes. This header
// file may change from version to version without notice, or even be removed.
//
// We mean it.
//
#include <QtGui/private/qgridlayoutengine_p.h>
#include <QtGui/private/qlayoutpolicy_p.h>
#include <QtCore/qmath.h>
#include "qquickitem.h"
#include "qquicklayout_p.h"
#include "qdebug.h"
QT_BEGIN_NAMESPACE
class QQuickGridLayoutItem : public QGridLayoutItem {
public:
QQuickGridLayoutItem(QQuickItem *item, int row, int column,
int rowSpan = 1, int columnSpan = 1, Qt::Alignment alignment = { })
: QGridLayoutItem(row, column, rowSpan, columnSpan, alignment), m_item(item), sizeHintCacheDirty(true), useFallbackToWidthOrHeight(true) {}
QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint) const override
{
Q_UNUSED(constraint); // Quick Layouts does not support constraint atm
return effectiveSizeHints()[which];
}
QSizeF *effectiveSizeHints() const
{
if (!sizeHintCacheDirty)
return cachedSizeHints;
QQuickLayout::effectiveSizeHints_helper(m_item, cachedSizeHints, 0, useFallbackToWidthOrHeight);
useFallbackToWidthOrHeight = false;
sizeHintCacheDirty = false;
return cachedSizeHints;
}
void setCachedSizeHints(QSizeF *sizeHints)
{
for (int i = 0; i < Qt::NSizeHints; ++i) {
cachedSizeHints[i] = sizeHints[i];
}
sizeHintCacheDirty = false;
}
void invalidate()
{
qCDebug(lcQuickLayouts) << "QQuickGridLayoutItem::invalidate()";
sizeHintCacheDirty = true;
}
QLayoutPolicy::Policy sizePolicy(Qt::Orientation orientation) const override
{
return QQuickLayout::effectiveSizePolicy_helper(m_item, orientation, attachedLayoutObject(m_item, false));
}
void setGeometry(const QRectF &rect) override
{
QQuickLayoutAttached *info = attachedLayoutObject(m_item, false);
const QRectF r = info ? rect.marginsRemoved(info->effectiveQMargins()) : rect;
const QSizeF oldSize(m_item->width(), m_item->height());
const QSizeF newSize = r.size();
m_item->setPosition(r.topLeft());
if (newSize == oldSize) {
// We need to enforce a rearrange when the geometry is the same
if (QQuickLayout *lay = qobject_cast<QQuickLayout *>(m_item)) {
if (lay->invalidatedArrangement())
lay->rearrange(newSize);
}
} else {
m_item->setSize(newSize);
}
}
QQuickItem *layoutItem() const { return m_item; }
QQuickItem *m_item;
private:
mutable QSizeF cachedSizeHints[Qt::NSizeHints];
mutable unsigned sizeHintCacheDirty : 1;
mutable unsigned useFallbackToWidthOrHeight : 1;
};
class QQuickGridLayoutEngine : public QGridLayoutEngine {
public:
QQuickGridLayoutEngine() : QGridLayoutEngine(Qt::AlignVCenter, true /*snapToPixelGrid*/) { }
int indexOf(QQuickItem *item) const {
for (int i = 0; i < q_items.size(); ++i) {
if (item == static_cast<QQuickGridLayoutItem*>(q_items.at(i))->layoutItem())
return i;
}
return -1;
}
QQuickGridLayoutItem *findLayoutItem(QQuickItem *layoutItem) const
{
for (int i = q_items.count() - 1; i >= 0; --i) {
QQuickGridLayoutItem *item = static_cast<QQuickGridLayoutItem*>(q_items.at(i));
if (item->layoutItem() == layoutItem)
return item;
}
return 0;
}
void setAlignment(QQuickItem *quickItem, Qt::Alignment alignment);
Qt::Alignment alignment(QQuickItem *quickItem) const;
};
QT_END_NAMESPACE
#endif // QQUICKGRIDLAYOUTENGINE_P_H
|
