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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** 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 QSIZEPOLICY_H
#define QSIZEPOLICY_H
#include <QtCore/qobject.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
class QVariant;
class Q_WIDGETS_EXPORT QSizePolicy
{
Q_GADGET
Q_ENUMS(Policy)
private:
enum SizePolicyMasks {
HSize = 4,
HMask = 0x0f,
VMask = HMask << HSize,
CTShift = 9,
CTSize = 5,
CTMask = ((0x1 << CTSize) - 1) << CTShift,
WFHShift = CTShift + CTSize,
UnusedShift = WFHShift + 1,
UnusedSize = 1
};
public:
enum PolicyFlag {
GrowFlag = 1,
ExpandFlag = 2,
ShrinkFlag = 4,
IgnoreFlag = 8
};
enum Policy {
Fixed = 0,
Minimum = GrowFlag,
Maximum = ShrinkFlag,
Preferred = GrowFlag | ShrinkFlag,
MinimumExpanding = GrowFlag | ExpandFlag,
Expanding = GrowFlag | ShrinkFlag | ExpandFlag,
Ignored = ShrinkFlag | GrowFlag | IgnoreFlag
};
enum ControlType {
DefaultType = 0x00000001,
ButtonBox = 0x00000002,
CheckBox = 0x00000004,
ComboBox = 0x00000008,
Frame = 0x00000010,
GroupBox = 0x00000020,
Label = 0x00000040,
Line = 0x00000080,
LineEdit = 0x00000100,
PushButton = 0x00000200,
RadioButton = 0x00000400,
Slider = 0x00000800,
SpinBox = 0x00001000,
TabWidget = 0x00002000,
ToolButton = 0x00004000
};
Q_DECLARE_FLAGS(ControlTypes, ControlType)
QSizePolicy() : data(0) { }
// ### Qt 5: merge these two constructors (with type == DefaultType)
QSizePolicy(Policy horizontal, Policy vertical)
: data(horizontal | (vertical << HSize)) { }
QSizePolicy(Policy horizontal, Policy vertical, ControlType type)
: data(horizontal | (vertical << HSize)) { setControlType(type); }
Policy horizontalPolicy() const { return static_cast<Policy>(data & HMask); }
Policy verticalPolicy() const { return static_cast<Policy>((data & VMask) >> HSize); }
ControlType controlType() const;
void setHorizontalPolicy(Policy d) { data = (data & ~HMask) | d; }
void setVerticalPolicy(Policy d) { data = (data & ~(HMask << HSize)) | (d << HSize); }
void setControlType(ControlType type);
Qt::Orientations expandingDirections() const {
Qt::Orientations result;
if (verticalPolicy() & ExpandFlag)
result |= Qt::Vertical;
if (horizontalPolicy() & ExpandFlag)
result |= Qt::Horizontal;
return result;
}
void setHeightForWidth(bool b) { data = b ? (data | (1 << 2*HSize)) : (data & ~(1 << 2*HSize)); }
bool hasHeightForWidth() const { return data & (1 << 2*HSize); }
void setWidthForHeight(bool b) { data = b ? (data | (1 << (WFHShift))) : (data & ~(1 << (WFHShift))); }
bool hasWidthForHeight() const { return data & (1 << (WFHShift)); }
bool operator==(const QSizePolicy& s) const { return data == s.data; }
bool operator!=(const QSizePolicy& s) const { return data != s.data; }
operator QVariant() const; // implemented in qabstractlayout.cpp
int horizontalStretch() const { return data >> 24; }
int verticalStretch() const { return (data >> 16) & 0xff; }
void setHorizontalStretch(uchar stretchFactor) { data = (data&0x00ffffff) | (uint(stretchFactor)<<24); }
void setVerticalStretch(uchar stretchFactor) { data = (data&0xff00ffff) | (uint(stretchFactor)<<16); }
void transpose();
private:
#ifndef QT_NO_DATASTREAM
friend Q_WIDGETS_EXPORT QDataStream &operator<<(QDataStream &, const QSizePolicy &);
friend Q_WIDGETS_EXPORT QDataStream &operator>>(QDataStream &, QSizePolicy &);
#endif
QSizePolicy(int i) : data(i) { }
quint32 data;
/* Qt5: Use bit flags instead, keep it here for improved readability for now.
We can maybe change it for Qt4, but we'd have to be careful, since the behaviour
is implementation defined. It usually varies between little- and big-endian compilers, but
it might also not vary.
quint32 horzPolicy : 4;
quint32 vertPolicy : 4;
quint32 hfw : 1;
quint32 ctype : 5;
quint32 wfh : 1;
quint32 padding : 1; // we cannot use the highest bit
quint32 verStretch : 8;
quint32 horStretch : 8;
*/
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QSizePolicy::ControlTypes)
#ifndef QT_NO_DATASTREAM
// implemented in qlayout.cpp
Q_WIDGETS_EXPORT QDataStream &operator<<(QDataStream &, const QSizePolicy &);
Q_WIDGETS_EXPORT QDataStream &operator>>(QDataStream &, QSizePolicy &);
#endif
#ifndef QT_NO_DEBUG_STREAM
Q_WIDGETS_EXPORT QDebug operator<<(QDebug dbg, const QSizePolicy &);
#endif
inline void QSizePolicy::transpose() {
Policy hData = horizontalPolicy();
Policy vData = verticalPolicy();
uchar hStretch = uchar(horizontalStretch());
uchar vStretch = uchar(verticalStretch());
setHorizontalPolicy(vData);
setVerticalPolicy(hData);
setHorizontalStretch(vStretch);
setVerticalStretch(hStretch);
}
QT_END_NAMESPACE
QT_END_HEADER
#endif // QSIZEPOLICY_H
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