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
|
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QLAYOUTITEM_H
#define QLAYOUTITEM_H
#include <QtWidgets/qsizepolicy.h>
#include <QtCore/qrect.h>
#include <limits.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Gui)
static const int QLAYOUTSIZE_MAX = INT_MAX/256/16;
class QLayout;
class QLayoutItem;
class QSpacerItem;
class QWidget;
class QSize;
class Q_WIDGETS_EXPORT QLayoutItem
{
public:
inline explicit QLayoutItem(Qt::Alignment alignment = 0);
virtual ~QLayoutItem();
virtual QSize sizeHint() const = 0;
virtual QSize minimumSize() const = 0;
virtual QSize maximumSize() const = 0;
virtual Qt::Orientations expandingDirections() const = 0;
virtual void setGeometry(const QRect&) = 0;
virtual QRect geometry() const = 0;
virtual bool isEmpty() const = 0;
virtual bool hasHeightForWidth() const;
virtual int heightForWidth(int) const;
virtual int minimumHeightForWidth(int) const;
virtual void invalidate();
virtual QWidget *widget();
virtual QLayout *layout();
virtual QSpacerItem *spacerItem();
Qt::Alignment alignment() const { return align; }
void setAlignment(Qt::Alignment a);
QSizePolicy::ControlTypes controlTypes() const;
protected:
Qt::Alignment align;
};
inline QLayoutItem::QLayoutItem(Qt::Alignment aalignment)
: align(aalignment) { }
class Q_WIDGETS_EXPORT QSpacerItem : public QLayoutItem
{
public:
QSpacerItem(int w, int h,
QSizePolicy::Policy hData = QSizePolicy::Minimum,
QSizePolicy::Policy vData = QSizePolicy::Minimum)
: width(w), height(h), sizeP(hData, vData) { }
void changeSize(int w, int h,
QSizePolicy::Policy hData = QSizePolicy::Minimum,
QSizePolicy::Policy vData = QSizePolicy::Minimum);
QSize sizeHint() const;
QSize minimumSize() const;
QSize maximumSize() const;
Qt::Orientations expandingDirections() const;
bool isEmpty() const;
void setGeometry(const QRect&);
QRect geometry() const;
QSpacerItem *spacerItem();
private:
int width;
int height;
QSizePolicy sizeP;
QRect rect;
};
class Q_WIDGETS_EXPORT QWidgetItem : public QLayoutItem
{
Q_DISABLE_COPY(QWidgetItem)
public:
explicit QWidgetItem(QWidget *w) : wid(w) { }
QSize sizeHint() const;
QSize minimumSize() const;
QSize maximumSize() const;
Qt::Orientations expandingDirections() const;
bool isEmpty() const;
void setGeometry(const QRect&);
QRect geometry() const;
virtual QWidget *widget();
bool hasHeightForWidth() const;
int heightForWidth(int) const;
protected:
QWidget *wid;
};
class Q_WIDGETS_EXPORT QWidgetItemV2 : public QWidgetItem
{
public:
explicit QWidgetItemV2(QWidget *widget);
~QWidgetItemV2();
QSize sizeHint() const;
QSize minimumSize() const;
QSize maximumSize() const;
int heightForWidth(int width) const;
private:
enum { Dirty = -123, HfwCacheMaxSize = 3 };
inline bool useSizeCache() const;
void updateCacheIfNecessary() const;
inline void invalidateSizeCache() {
q_cachedMinimumSize.setWidth(Dirty);
q_hfwCacheSize = 0;
}
mutable QSize q_cachedMinimumSize;
mutable QSize q_cachedSizeHint;
mutable QSize q_cachedMaximumSize;
mutable QSize q_cachedHfws[HfwCacheMaxSize];
mutable short q_firstCachedHfw;
mutable short q_hfwCacheSize;
void *d;
friend class QWidgetPrivate;
Q_DISABLE_COPY(QWidgetItemV2)
};
QT_END_NAMESPACE
QT_END_HEADER
#endif // QLAYOUTITEM_H
|
