QSizePolicy Class Reference

#include <qsizepolicy.h>

Public Types
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 }
enum	Policy {   Fixed = 0, Minimum = GrowFlag, Maximum = ShrinkFlag, Preferred = GrowFlag | ShrinkFlag,   MinimumExpanding = GrowFlag | ExpandFlag, Expanding = GrowFlag | ShrinkFlag | ExpandFlag, Ignored = ShrinkFlag | GrowFlag | IgnoreFlag }
enum	PolicyFlag { GrowFlag = 1, ExpandFlag = 2, ShrinkFlag = 4, IgnoreFlag = 8 }

Public Functions
ControlType	controlType () const
Qt::Orientations	expandingDirections () const
bool	hasHeightForWidth () const
bool	hasWidthForHeight () const
Policy	horizontalPolicy () const
int	horizontalStretch () const
	operator QVariant () const
	Returns a QVariant storing this QSizePolicy. More...
bool	operator!= (const QSizePolicy &s) const
bool	operator== (const QSizePolicy &s) const
	QSizePolicy ()
	QSizePolicy (Policy horizontal, Policy vertical)
	QSizePolicy (Policy horizontal, Policy vertical, ControlType type)
void	setControlType (ControlType type)
void	setHeightForWidth (bool b)
void	setHorizontalPolicy (Policy d)
void	setHorizontalStretch (uchar stretchFactor)
void	setVerticalPolicy (Policy d)
void	setVerticalStretch (uchar stretchFactor)
void	setWidthForHeight (bool b)
void	transpose ()
Policy	verticalPolicy () const
int	verticalStretch () const

Private Types
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 }

Private Functions
	QSizePolicy (int i)

Properties
quint32	data

Friends
Q_GUI_EXPORT QDataStream &	operator<< (QDataStream &, const QSizePolicy &)
	Writes the size policy to the data stream stream. More...
Q_GUI_EXPORT QDataStream &	operator>> (QDataStream &, QSizePolicy &)
	Reads the size policy from the data stream stream. More...

Detailed Description

Definition at line 55 of file qsizepolicy.h.

Enumerations

ControlType

enum QSizePolicy::ControlType

Enumerator
DefaultType
ButtonBox
CheckBox
ComboBox
Frame
GroupBox
Label
Line
LineEdit
PushButton
RadioButton
Slider
SpinBox
TabWidget
ToolButton

Definition at line 91 of file qsizepolicy.h.

                     {
        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
    };

Policy

enum QSizePolicy::Policy

Enumerator
Fixed
Minimum
Maximum
Preferred
MinimumExpanding
Expanding
Ignored

Definition at line 81 of file qsizepolicy.h.

                {
        Fixed = 0,
        Minimum = GrowFlag,
        Maximum = ShrinkFlag,
        Preferred = GrowFlag | ShrinkFlag,
        MinimumExpanding = GrowFlag | ExpandFlag,
        Expanding = GrowFlag | ShrinkFlag | ExpandFlag,
        Ignored = ShrinkFlag | GrowFlag | IgnoreFlag
    };

PolicyFlag

enum QSizePolicy::PolicyFlag

Enumerator
GrowFlag
ExpandFlag
ShrinkFlag
IgnoreFlag

Definition at line 74 of file qsizepolicy.h.

                    {
        GrowFlag = 1,
        ExpandFlag = 2,
        ShrinkFlag = 4,
        IgnoreFlag = 8
    };

SizePolicyMasks

enum QSizePolicy::SizePolicyMasks

private

Enumerator
HSize
HMask
VMask
CTShift
CTSize
CTMask
WFHShift
UnusedShift
UnusedSize

Definition at line 61 of file qsizepolicy.h.

                         {
        HSize = 4,
        HMask = 0x0f,
        VMask = HMask << HSize,
        CTShift = 9,
        CTSize = 5,
        CTMask = ((0x1 << CTSize) - 1) << CTShift,
        WFHShift = CTShift + CTSize,
        UnusedShift = WFHShift + 1,
        UnusedSize = 1
    };

Constructors and Destructors

QSizePolicy() [1/4]

QSizePolicy::QSizePolicy ( )

inline

Definition at line 110 of file qsizepolicy.h.

: data(0) { }

QSizePolicy() [2/4]

QSizePolicy::QSizePolicy ( Policy  horizontal, Policy  vertical  )

inline

Definition at line 113 of file qsizepolicy.h.

        : data(horizontal | (vertical << HSize)) { }

QSizePolicy() [3/4]

QSizePolicy::QSizePolicy ( Policy  horizontal, Policy  vertical, ControlType  type  )

inline

Definition at line 115 of file qsizepolicy.h.

        : data(horizontal | (vertical << HSize)) { setControlType(type); }

QSizePolicy() [4/4]

QSizePolicy::QSizePolicy ( int  i )

inlineprivate

Definition at line 202 of file qsizepolicy.h.

: data(i) { }

Functions

controlType()

QSizePolicy::ControlType QSizePolicy::controlType

(

)

const

Definition at line 1670 of file qlayout.cpp.

Referenced by QLayoutItem::controlTypes(), QGridLayoutItem::controlTypes(), and QMacStyle::pixelMetric().

{
    return QSizePolicy::ControlType(0x1 << ((data & CTMask) >> CTShift));
}

expandingDirections()

Qt::Orientations QSizePolicy::expandingDirections ( ) const

inline

Definition at line 126 of file qsizepolicy.h.

                                               {
        Qt::Orientations result;
        if (verticalPolicy() & ExpandFlag)
            result |= Qt::Vertical;
        if (horizontalPolicy() & ExpandFlag)
            result |= Qt::Horizontal;
        return result;
    }

hasHeightForWidth()

bool QSizePolicy::hasHeightForWidth ( ) const

inline

Definition at line 136 of file qsizepolicy.h.

Referenced by QTabWidgetPrivate::hasHeightForWidth(), and QScrollAreaPrivate::updateScrollBars().

{ return data & (1 << 2*HSize); }

hasWidthForHeight()

bool QSizePolicy::hasWidthForHeight ( ) const

inline

Definition at line 138 of file qsizepolicy.h.

{ return data & (1 << (WFHShift)); }

horizontalPolicy()

Policy QSizePolicy::horizontalPolicy ( ) const

inline

Definition at line 118 of file qsizepolicy.h.

Referenced by pick(), qSmartMaxSize(), qSmartMinSize(), QToolBarAreaLayoutItem::realSizeHint(), QWidgetItem::setGeometry(), QStackedLayout::sizeHint(), QToolBarLayout::updateGeomArray(), and QAxServerBase::updateGeometry().

{ return static_cast<Policy>(data & HMask); }

horizontalStretch()

int QSizePolicy::horizontalStretch ( ) const

inline

Definition at line 144 of file qsizepolicy.h.

Referenced by QSplitterPrivate::doResize(), QSplitterPrivate::findWidget(), QSplitterLayoutStruct::getWidgetSize(), QBoxLayoutItem::hStretch(), and QToolBarLayout::updateGeomArray().

{ return data >> 24; }

operator QVariant()

QSizePolicy::operator QVariant

(

)

const

Returns a QVariant storing this QSizePolicy.

Definition at line 80 of file qlayoutitem.cpp.

{
    return QVariant(QVariant::SizePolicy, this);
}

operator!=()

bool QSizePolicy::operator!= ( const QSizePolicy &  s ) const

inline

Definition at line 141 of file qsizepolicy.h.

{ return data != s.data; }

operator==()

bool QSizePolicy::operator== ( const QSizePolicy &  s ) const

inline

Definition at line 140 of file qsizepolicy.h.

{ return data == s.data; }

setControlType()

void QSizePolicy::setControlType

(

ControlType

type

)

Definition at line 1644 of file qlayout.cpp.

{
    /*
        The control type is a flag type, with values 0x1, 0x2, 0x4, 0x8, 0x10,
        etc. In memory, we pack it onto the available bits (CTSize) in
        setControlType(), and unpack it here.

        Example:

            0x00000001 maps to 0x00000000
            0x00000002 maps to 0x00000200
            0x00000004 maps to 0x00000400
            0x00000008 maps to 0x00000600
            etc.
    */

    int i = 0;
    while (true) {
        if (type & (0x1 << i)) {
            data = (data & ~CTMask) | (i << CTShift);
            return;
        }
        ++i;
    }
}

setHeightForWidth()

void QSizePolicy::setHeightForWidth ( bool  b )

inline

Definition at line 135 of file qsizepolicy.h.

Referenced by QCommandLinkButtonPrivate::init(), QLabelPrivate::updateLabel(), and QMessageBoxPrivate::updateSize().

{ data = b ? (data | (1 << 2*HSize)) : (data & ~(1 << 2*HSize));  }

setHorizontalPolicy()

void QSizePolicy::setHorizontalPolicy ( Policy  d )

inline

Definition at line 122 of file qsizepolicy.h.

Referenced by QAbstractScrollAreaScrollBarContainer::addWidget().

{ data = (data & ~HMask) | d; }

setHorizontalStretch()

void QSizePolicy::setHorizontalStretch ( uchar  stretchFactor )

inline

Definition at line 146 of file qsizepolicy.h.

Referenced by QSplitterPrivate::findWidget(), and QSplitter::setStretchFactor().

{ data = (data&0x00ffffff) | (uint(stretchFactor)<<24); }

setVerticalPolicy()

void QSizePolicy::setVerticalPolicy ( Policy  d )

inline

Definition at line 123 of file qsizepolicy.h.

Referenced by QAbstractScrollAreaScrollBarContainer::addWidget().

{ data = (data & ~(HMask << HSize)) | (d << HSize); }

setVerticalStretch()

void QSizePolicy::setVerticalStretch ( uchar  stretchFactor )

inline

Definition at line 147 of file qsizepolicy.h.

Referenced by QSplitterPrivate::findWidget(), and QSplitter::setStretchFactor().

{ data = (data&0xff00ffff) | (uint(stretchFactor)<<16); }

setWidthForHeight()

void QSizePolicy::setWidthForHeight ( bool  b )

inline

Definition at line 137 of file qsizepolicy.h.

{ data = b ? (data | (1 << (WFHShift))) : (data & ~(1 << (WFHShift)));  }

transpose()

void QSizePolicy::transpose ( )

inline

Definition at line 229 of file qsizepolicy.h.

Referenced by QProgressBarPrivate::init(), QSliderPrivate::init(), QSplitterPrivate::init(), QScrollBarPrivate::init(), QDialogButtonBoxPrivate::initLayout(), QSplitter::setOrientation(), QProgressBar::setOrientation(), and QAbstractSlider::setOrientation().

                                   {
    Policy hData = horizontalPolicy();
    Policy vData = verticalPolicy();
    uchar hStretch = uchar(horizontalStretch());
    uchar vStretch = uchar(verticalStretch());
    setHorizontalPolicy(vData);
    setVerticalPolicy(hData);
    setHorizontalStretch(vStretch);
    setVerticalStretch(hStretch);
}

verticalPolicy()

Policy QSizePolicy::verticalPolicy ( ) const

inline

Definition at line 119 of file qsizepolicy.h.

Referenced by pick(), qSmartMaxSize(), qSmartMinSize(), QToolBarAreaLayoutItem::realSizeHint(), QWidgetItem::setGeometry(), QWidget::show(), QStackedLayout::sizeHint(), and QAxServerBase::updateGeometry().

{ return static_cast<Policy>((data & VMask) >> HSize); }

verticalStretch()

int QSizePolicy::verticalStretch ( ) const

inline

Definition at line 145 of file qsizepolicy.h.

Referenced by QSplitterPrivate::doResize(), QSplitterPrivate::findWidget(), QSplitterLayoutStruct::getWidgetSize(), QToolBarLayout::updateGeomArray(), QBoxLayoutItem::vStretch(), and QFormLayoutItem::vStretch().

{ return (data >> 16) & 0xff; }

Friends and Related Functions

operator<<

QDataStream & operator<< ( QDataStream &  stream, const QSizePolicy &  policy  )

friend

Writes the size policy to the data stream stream.

Since

4.2

See also

Format of the QDataStream operators

Definition at line 1687 of file qlayout.cpp.

{
    return stream << policy.data;
}

operator>>

QDataStream & operator>> ( QDataStream &  stream, QSizePolicy &  policy  )

friend

Reads the size policy from the data stream stream.

Since

4.2

See also

Format of the QDataStream operators

Definition at line 1703 of file qlayout.cpp.

{
    return stream >> policy.data;
}

Properties

data

quint32 QSizePolicy::data

private

Definition at line 204 of file qsizepolicy.h.

Referenced by operator!=(), and operator==().

---

The documentation for this class was generated from the following files:

• /src/gui/kernel/qsizepolicy.h
• /src/gui/kernel/qlayout.cpp
• /src/gui/kernel/qlayoutitem.cpp