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| ** This file is part of the QtWidgets module of the Qt Toolkit. |
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| ****************************************************************************/ |
| |
| #ifndef QSIZEPOLICY_H |
| #define QSIZEPOLICY_H |
| |
| #include <QtWidgets/qtwidgetsglobal.h> |
| #include <QtCore/qobject.h> |
| #include <QtCore/qalgorithms.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| // gcc < 4.8.0 has problems with init'ing variant members in constexpr ctors |
| // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54922 |
| #if !defined(Q_CC_GNU) || defined(Q_CC_INTEL) || defined(Q_CC_CLANG) || Q_CC_GNU >= 408 |
| # define QT_SIZEPOLICY_CONSTEXPR Q_DECL_CONSTEXPR |
| # if defined(Q_COMPILER_UNIFORM_INIT) |
| # define QT_SIZEPOLICY_CONSTEXPR_AND_UNIFORM_INIT Q_DECL_CONSTEXPR |
| # endif // uniform-init |
| #endif |
| |
| #ifndef QT_SIZEPOLICY_CONSTEXPR |
| # define QT_SIZEPOLICY_CONSTEXPR |
| #endif |
| #ifndef QT_SIZEPOLICY_CONSTEXPR_AND_UNIFORM_INIT |
| # define QT_SIZEPOLICY_CONSTEXPR_AND_UNIFORM_INIT |
| #endif |
| |
| class QVariant; |
| class QSizePolicy; |
| |
| Q_DECL_CONST_FUNCTION inline uint qHash(QSizePolicy key, uint seed = 0) noexcept; |
| |
| class Q_WIDGETS_EXPORT QSizePolicy |
| { |
| Q_GADGET |
| |
| 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 |
| }; |
| Q_ENUM(Policy) |
| |
| 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) |
| Q_FLAG(ControlTypes) |
| |
| QT_SIZEPOLICY_CONSTEXPR QSizePolicy() noexcept : data(0) { } |
| |
| #if defined(Q_COMPILER_UNIFORM_INIT) && !defined(Q_QDOC) |
| QT_SIZEPOLICY_CONSTEXPR QSizePolicy(Policy horizontal, Policy vertical, ControlType type = DefaultType) noexcept |
| : bits{0, 0, quint32(horizontal), quint32(vertical), |
| type == DefaultType ? 0 : toControlTypeFieldValue(type), 0, 0, 0} |
| {} |
| #else |
| QSizePolicy(Policy horizontal, Policy vertical, ControlType type = DefaultType) noexcept |
| : data(0) { |
| bits.horPolicy = horizontal; |
| bits.verPolicy = vertical; |
| setControlType(type); |
| } |
| #endif // uniform-init |
| QT_SIZEPOLICY_CONSTEXPR Policy horizontalPolicy() const noexcept { return static_cast<Policy>(bits.horPolicy); } |
| QT_SIZEPOLICY_CONSTEXPR Policy verticalPolicy() const noexcept { return static_cast<Policy>(bits.verPolicy); } |
| ControlType controlType() const noexcept; |
| |
| Q_DECL_RELAXED_CONSTEXPR void setHorizontalPolicy(Policy d) noexcept { bits.horPolicy = d; } |
| Q_DECL_RELAXED_CONSTEXPR void setVerticalPolicy(Policy d) noexcept { bits.verPolicy = d; } |
| void setControlType(ControlType type) noexcept; |
| |
| QT_SIZEPOLICY_CONSTEXPR Qt::Orientations expandingDirections() const noexcept { |
| return ( (verticalPolicy() & ExpandFlag) ? Qt::Vertical : Qt::Orientations() ) |
| | ( (horizontalPolicy() & ExpandFlag) ? Qt::Horizontal : Qt::Orientations() ) ; |
| } |
| |
| Q_DECL_RELAXED_CONSTEXPR void setHeightForWidth(bool b) noexcept { bits.hfw = b; } |
| QT_SIZEPOLICY_CONSTEXPR bool hasHeightForWidth() const noexcept { return bits.hfw; } |
| Q_DECL_RELAXED_CONSTEXPR void setWidthForHeight(bool b) noexcept { bits.wfh = b; } |
| QT_SIZEPOLICY_CONSTEXPR bool hasWidthForHeight() const noexcept { return bits.wfh; } |
| |
| QT_SIZEPOLICY_CONSTEXPR bool operator==(const QSizePolicy& s) const noexcept { return data == s.data; } |
| QT_SIZEPOLICY_CONSTEXPR bool operator!=(const QSizePolicy& s) const noexcept { return data != s.data; } |
| |
| friend Q_DECL_CONST_FUNCTION uint qHash(QSizePolicy key, uint seed) noexcept { return qHash(key.data, seed); } |
| |
| operator QVariant() const; |
| |
| QT_SIZEPOLICY_CONSTEXPR int horizontalStretch() const noexcept { return static_cast<int>(bits.horStretch); } |
| QT_SIZEPOLICY_CONSTEXPR int verticalStretch() const noexcept { return static_cast<int>(bits.verStretch); } |
| Q_DECL_RELAXED_CONSTEXPR void setHorizontalStretch(int stretchFactor) { bits.horStretch = static_cast<quint32>(qBound(0, stretchFactor, 255)); } |
| Q_DECL_RELAXED_CONSTEXPR void setVerticalStretch(int stretchFactor) { bits.verStretch = static_cast<quint32>(qBound(0, stretchFactor, 255)); } |
| |
| QT_SIZEPOLICY_CONSTEXPR bool retainSizeWhenHidden() const noexcept { return bits.retainSizeWhenHidden; } |
| Q_DECL_RELAXED_CONSTEXPR void setRetainSizeWhenHidden(bool retainSize) noexcept { bits.retainSizeWhenHidden = retainSize; } |
| |
| Q_DECL_RELAXED_CONSTEXPR void transpose() noexcept { *this = transposed(); } |
| Q_REQUIRED_RESULT |
| #ifndef Q_QDOC |
| QT_SIZEPOLICY_CONSTEXPR_AND_UNIFORM_INIT |
| #endif |
| QSizePolicy transposed() const noexcept |
| { |
| return QSizePolicy(bits.transposed()); |
| } |
| |
| private: |
| #ifndef QT_NO_DATASTREAM |
| friend Q_WIDGETS_EXPORT QDataStream &operator<<(QDataStream &, const QSizePolicy &); |
| friend Q_WIDGETS_EXPORT QDataStream &operator>>(QDataStream &, QSizePolicy &); |
| #endif |
| QT_SIZEPOLICY_CONSTEXPR QSizePolicy(int i) noexcept : data(i) { } |
| struct Bits; |
| QT_SIZEPOLICY_CONSTEXPR explicit QSizePolicy(Bits b) noexcept : bits(b) { } |
| |
| static Q_DECL_RELAXED_CONSTEXPR quint32 toControlTypeFieldValue(ControlType type) noexcept |
| { |
| /* |
| 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 0 |
| 0x00000002 maps to 1 |
| 0x00000004 maps to 2 |
| 0x00000008 maps to 3 |
| etc. |
| */ |
| |
| return qCountTrailingZeroBits(static_cast<quint32>(type)); |
| } |
| |
| struct Bits { |
| quint32 horStretch : 8; |
| quint32 verStretch : 8; |
| quint32 horPolicy : 4; |
| quint32 verPolicy : 4; |
| quint32 ctype : 5; |
| quint32 hfw : 1; |
| quint32 wfh : 1; |
| quint32 retainSizeWhenHidden : 1; |
| |
| QT_SIZEPOLICY_CONSTEXPR_AND_UNIFORM_INIT |
| Bits transposed() const noexcept |
| { |
| return {verStretch, // \ swap |
| horStretch, // / |
| verPolicy, // \ swap |
| horPolicy, // / |
| ctype, |
| hfw, // \ don't swap (historic behavior) |
| wfh, // / |
| retainSizeWhenHidden}; |
| } |
| }; |
| union { |
| Bits bits; |
| quint32 data; |
| }; |
| }; |
| #if QT_VERSION >= QT_VERSION_CHECK(6,0,0) |
| // Can't add in Qt 5, as QList<QSizePolicy> would be BiC: |
| Q_DECLARE_TYPEINFO(QSizePolicy, Q_PRIMITIVE_TYPE); |
| #else |
| Q_DECLARE_TYPEINFO(QSizePolicy, Q_RELOCATABLE_TYPE); |
| #endif |
| |
| Q_DECLARE_OPERATORS_FOR_FLAGS(QSizePolicy::ControlTypes) |
| |
| #ifndef QT_NO_DATASTREAM |
| 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 |
| |
| |
| #undef QT_SIZEPOLICY_CONSTEXPR |
| #undef QT_SIZEPOLICY_CONSTEXPR_AND_UNIFORM_INIT |
| |
| QT_END_NAMESPACE |
| |
| #endif // QSIZEPOLICY_H |