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
|
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, 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, Digia gives you certain additional
** rights. These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QLAYOUTENGINE_P_H
#define QLAYOUTENGINE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "QtGui/qlayoutitem.h"
#include "QtGui/qstyle.h"
QT_BEGIN_NAMESPACE
template <typename T> class QVector;
struct QLayoutStruct
{
inline void init(int stretchFactor = 0, int minSize = 0) {
stretch = stretchFactor;
minimumSize = sizeHint = minSize;
maximumSize = QLAYOUTSIZE_MAX;
expansive = false;
empty = true;
spacing = 0;
}
int smartSizeHint() {
return (stretch > 0) ? minimumSize : sizeHint;
}
int effectiveSpacer(int uniformSpacer) const {
Q_ASSERT(uniformSpacer >= 0 || spacing >= 0);
return (uniformSpacer >= 0) ? uniformSpacer : spacing;
}
// parameters
int stretch;
int sizeHint;
int maximumSize;
int minimumSize;
bool expansive;
bool empty;
int spacing;
// temporary storage
bool done;
// result
int pos;
int size;
};
Q_GUI_EXPORT void qGeomCalc(QVector<QLayoutStruct> &chain, int start, int count,
int pos, int space, int spacer = -1);
Q_GUI_EXPORT QSize qSmartMinSize(const QSize &sizeHint, const QSize &minSizeHint,
const QSize &minSize, const QSize &maxSize,
const QSizePolicy &sizePolicy);
Q_GUI_EXPORT QSize qSmartMinSize(const QWidgetItem *i);
Q_GUI_EXPORT QSize qSmartMinSize(const QWidget *w);
Q_GUI_EXPORT QSize qSmartMaxSize(const QSize &sizeHint,
const QSize &minSize, const QSize &maxSize,
const QSizePolicy &sizePolicy, Qt::Alignment align = 0);
Q_GUI_EXPORT QSize qSmartMaxSize(const QWidgetItem *i, Qt::Alignment align = 0);
Q_GUI_EXPORT QSize qSmartMaxSize(const QWidget *w, Qt::Alignment align = 0);
Q_GUI_EXPORT int qSmartSpacing(const QLayout *layout, QStyle::PixelMetric pm);
/*
Modify total maximum (max), total expansion (exp), and total empty
when adding boxmax/boxexp.
Expansive boxes win over non-expansive boxes.
Non-empty boxes win over empty boxes.
*/
static inline void qMaxExpCalc(int & max, bool &exp, bool &empty,
int boxmax, bool boxexp, bool boxempty)
{
if (exp) {
if (boxexp)
max = qMax(max, boxmax);
} else {
if (boxexp || (empty && (!boxempty || max == 0)))
max = boxmax;
else if (empty == boxempty)
max = qMin(max, boxmax);
}
exp = exp || boxexp;
empty = empty && boxempty;
}
QT_END_NAMESPACE
#endif // QLAYOUTENGINE_P_H
|
