qlayoutpolicy.cpp

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

2 ** -

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

5 ** -

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

7 ** -

8 ** $QT_BEGIN_LICENSE:LGPL$ -

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 https://www.qt.io/terms-conditions. For further -

15 ** information use the contact form at https://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 3 as published by the Free Software -

20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the -

21 ** packaging of this file. Please review the following information to -

22 ** ensure the GNU Lesser General Public License version 3 requirements -

23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -

24 ** -

25 ** GNU General Public License Usage -

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

27 ** General Public License version 2.0 or (at your option) the GNU General -

28 ** Public license version 3 or any later version approved by the KDE Free -

29 ** Qt Foundation. The licenses are as published by the Free Software -

30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -

31 ** included in the packaging of this file. Please review the following -

32 ** information to ensure the GNU General Public License requirements will -

33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and -

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35 ** -

36 ** $QT_END_LICENSE$ -

37 ** -

38 ****************************************************************************/ -

39 -

40 #include "qlayoutpolicy_p.h" -

41 #include <QtCore/qdebug.h> -

42 #include <QtCore/qdatastream.h> -

43 -

44 QT_BEGIN_NAMESPACE -

45 -

46 void QLayoutPolicy::setControlType(ControlType type) -

47 { -

48 /* -

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

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

51 setControlType(), and unpack it here. -

52 -

53 Example: -

54 -

55 0x00000001 maps to 0 -

56 0x00000002 maps to 1 -

57 0x00000004 maps to 2 -

58 0x00000008 maps to 3 -

59 etc. -

60 */ -

61 -

62 int i = 0; -

63 while (true) { -

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

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

65 bits.ctype = i; -

return;

never executed: return;

67 } -

68 ++i; -

}

never executed: end of block

}

never executed: end of block

71 -

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

73 { -

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

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

75 } -

76 -

77 #ifndef QT_NO_DATASTREAM -

78 -

79 /*! -

80 \relates QLayoutPolicy -

81 -

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

83 -

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

85 */ -

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

87 { -

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

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

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

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

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

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

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

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

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

return stream << data;

never executed: return stream << data;

98 } -

99 -

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

101 -

102 /*! -

103 \relates QLayoutPolicy -

104 -

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

106 -

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

108 */ -

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

110 { -

111 quint32 data; -

112 stream >> data; -

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

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

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

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

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

118 policy.bits.padding = 0; -

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

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

121

return stream;

never executed: return stream;

122 } -

123 #endif // QT_NO_DATASTREAM -

124 -

125 #ifndef QT_NO_DEBUG_STREAM -

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

127 { -

128 QDebugStateSaver saver(dbg); -

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

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

131

return dbg;

never executed: return dbg;

132 } -

133 #endif -

134 -

135 QT_END_NAMESPACE -

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