qlayoutpolicy.cpp

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1 /**************************************************************************** -

2 ** -

4 ** Contact: http://www.qt.io/licensing/ -

5 ** -

6 ** This file is part of the Qt Quick Layouts module of the Qt Toolkit. -

7 ** -

8 ** $QT_BEGIN_LICENSE:LGPL21$ -

9 ** Commercial License Usage -

10 ** Licensees holding valid commercial Qt licenses may use this file in -

11 ** accordance with the commercial license agreement provided with the -

12 ** Software or, alternatively, in accordance with the terms contained in -

13 ** a written agreement between you and The Qt Company. For licensing terms -

14 ** and conditions see http://www.qt.io/terms-conditions. For further -

15 ** information use the contact form at http://www.qt.io/contact-us. -

16 ** -

17 ** GNU Lesser General Public License Usage -

18 ** Alternatively, this file may be used under the terms of the GNU Lesser -

19 ** General Public License version 2.1 or version 3 as published by the Free -

20 ** Software Foundation and appearing in the file LICENSE.LGPLv21 and -

21 ** LICENSE.LGPLv3 included in the packaging of this file. Please review the -

22 ** following information to ensure the GNU Lesser General Public License -

23 ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and -

24 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -

25 ** -

26 ** As a special exception, The Qt Company gives you certain additional -

27 ** rights. These rights are described in The Qt Company LGPL Exception -

28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -

29 ** -

30 ** $QT_END_LICENSE$ -

31 ** -

32 ****************************************************************************/ -

33 -

34 #include "qlayoutpolicy_p.h" -

35 #include <QtCore/qdebug.h> -

36 #include <QtCore/qdatastream.h> -

37 -

38 QT_BEGIN_NAMESPACE -

39 -

40 void QLayoutPolicy::setControlType(ControlType type) -

41 { -

42 /* -

43 The control type is a flag type, with values 0x1, 0x2, 0x4, 0x8, 0x10, -

44 etc. In memory, we pack it onto the available bits (CTSize) in -

45 setControlType(), and unpack it here. -

46 -

47 Example: -

48 -

49 0x00000001 maps to 0 -

50 0x00000002 maps to 1 -

51 0x00000004 maps to 2 -

52 0x00000008 maps to 3 -

53 etc. -

54 */ -

55 -

56 int i = 0; -

57 while (true) { -

if (type & (0x1 << i)) {

type & (0x1 << i)	Description
TRUE	never evaluated
FALSE	never evaluated

59 bits.ctype = i; -

return;

never executed: return;

61 } -

62 ++i; -

}

never executed: end of block

}

never executed: end of block

65 -

66 QLayoutPolicy::ControlType QLayoutPolicy::controlType() const -

67 { -

return QLayoutPolicy::ControlType(1 << bits.ctype);

never executed: return QLayoutPolicy::ControlType(1 << bits.ctype);

69 } -

70 -

71 #ifndef QT_NO_DATASTREAM -

72 -

73 /*! -

74 \relates QLayoutPolicy -

75 -

76 Writes the size \a policy to the data stream \a stream. -

77 -

78 \sa{Serializing Qt Data Types}{Format of the QDataStream operators} -

79 */ -

80 QDataStream &operator<<(QDataStream &stream, const QLayoutPolicy &policy) -

81 { -

82 // The order here is for historical reasons. (compatibility with Qt4) -

83 quint32 data = (policy.bits.horPolicy | // [0, 3] -

84 policy.bits.verPolicy << 4 | // [4, 7] -

85 policy.bits.hfw << 8 | // [8] -

86 policy.bits.ctype << 9 | // [9, 13] -

87 policy.bits.wfh << 14 | // [14] -

88 //policy.bits.padding << 15 | // [15] -

89 policy.bits.verStretch << 16 | // [16, 23] -

90 policy.bits.horStretch << 24); // [24, 31] -

return stream << data;

never executed: return stream << data;

92 } -

93 -

94 #define VALUE_OF_BITS(data, bitstart, bitcount) ((data >> bitstart) & ((1 << bitcount) -1)) -

95 -

96 /*! -

97 \relates QLayoutPolicy -

98 -

99 Reads the size \a policy from the data stream \a stream. -

100 -

101 \sa{Serializing Qt Data Types}{Format of the QDataStream operators} -

102 */ -

103 QDataStream &operator>>(QDataStream &stream, QLayoutPolicy &policy) -

104 { -

105 quint32 data; -

106 stream >> data; -

107 policy.bits.horPolicy = VALUE_OF_BITS(data, 0, 4); -

108 policy.bits.verPolicy = VALUE_OF_BITS(data, 4, 4); -

109 policy.bits.hfw = VALUE_OF_BITS(data, 8, 1); -

110 policy.bits.ctype = VALUE_OF_BITS(data, 9, 5); -

111 policy.bits.wfh = VALUE_OF_BITS(data, 14, 1); -

112 policy.bits.padding = 0; -

113 policy.bits.verStretch = VALUE_OF_BITS(data, 16, 8); -

114 policy.bits.horStretch = VALUE_OF_BITS(data, 24, 8); -

115

return stream;

never executed: return stream;

116 } -

117 #endif // QT_NO_DATASTREAM -

118 -

119 #ifndef QT_NO_DEBUG_STREAM -

120 QDebug operator<<(QDebug dbg, const QLayoutPolicy &p) -

121 { -

122 QDebugStateSaver saver(dbg); -

123 dbg.nospace() << "QLayoutPolicy(horizontalPolicy = " << p.horizontalPolicy() -

124 << ", verticalPolicy = " << p.verticalPolicy() << ')'; -

125

return dbg;

never executed: return dbg;

126 } -

127 #endif -

128 -

129 QT_END_NAMESPACE -

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