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/****************************************************************************
**
** Copyright (C) 2010 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSIZEPOLICY_H
#define QSIZEPOLICY_H
#include <QtCore/qobject.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Gui)
class QVariant;
class Q_GUI_EXPORT QSizePolicy
{
Q_GADGET
Q_ENUMS(Policy)
private:
enum SizePolicyMasks {
HSize = 4,
HMask = 0x0f,
VMask = HMask << HSize,
CTShift = 9,
CTSize = 5,
WFHShift = CTShift + CTSize,
CTMask = ((0x1 << CTSize) - 1) << CTShift,
UnusedShift = CTShift + CTSize,
UnusedSize = 2
};
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 expanding() 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); }
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();
#ifdef QT3_SUPPORT
typedef Policy SizeType;
#ifndef qdoc
typedef Qt::Orientations ExpandData;
enum {
NoDirection = 0,
Horizontally = 1,
Vertically = 2,
BothDirections = Horizontally | Vertically
};
#else
enum ExpandData {
NoDirection = 0x0,
Horizontally = 0x1,
Vertically = 0x2,
BothDirections = 0x3
};
#endif // qdoc
inline QT3_SUPPORT bool mayShrinkHorizontally() const
{ return horizontalPolicy() & ShrinkFlag; }
inline QT3_SUPPORT bool mayShrinkVertically() const { return verticalPolicy() & ShrinkFlag; }
inline QT3_SUPPORT bool mayGrowHorizontally() const { return horizontalPolicy() & GrowFlag; }
inline QT3_SUPPORT bool mayGrowVertically() const { return verticalPolicy() & GrowFlag; }
inline QT3_SUPPORT Qt::Orientations expanding() const { return expanding(); }
QT3_SUPPORT_CONSTRUCTOR QSizePolicy(Policy hor, Policy ver, bool hfw)
: data(hor | (ver<<HSize) | (hfw ? (1U<<2*HSize) : 0)) { }
QT3_SUPPORT_CONSTRUCTOR QSizePolicy(Policy hor, Policy ver, uchar hors, uchar vers, bool hfw = false)
: data(hor | (ver<<HSize) | (hfw ? (1U<<2*HSize) : 0)) {
setHorizontalStretch(hors);
setVerticalStretch(vers);
}
inline QT3_SUPPORT Policy horData() const { return static_cast<Policy>(data & HMask); }
inline QT3_SUPPORT Policy verData() const { return static_cast<Policy>((data & VMask) >> HSize); }
inline QT3_SUPPORT void setHorData(Policy d) { setHorizontalPolicy(d); }
inline QT3_SUPPORT void setVerData(Policy d) { setVerticalPolicy(d); }
inline QT3_SUPPORT uint horStretch() const { return horizontalStretch(); }
inline QT3_SUPPORT uint verStretch() const { return verticalStretch(); }
inline QT3_SUPPORT void setHorStretch(uchar sf) { setHorizontalStretch(sf); }
inline QT3_SUPPORT void setVerStretch(uchar sf) { setVerticalStretch(sf); }
#endif
private:
#ifndef QT_NO_DATASTREAM
friend Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QSizePolicy &);
friend Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QSizePolicy &);
#endif
QSizePolicy(int i) : data(i) { }
quint32 data;
/* use bit flags instead, keep it here for improved readability for now
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 horStretch : 8;
quint32 verStretch : 8;
*/
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QSizePolicy::ControlTypes)
#ifndef QT_NO_DATASTREAM
// implemented in qlayout.cpp
Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QSizePolicy &);
Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, 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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