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39
40#include "qvariant.h"
41
42#include "qsizepolicy.h"
43#include "qwidget.h"
44
45#include "private/qvariant_p.h"
46#include <private/qmetatype_p.h>
47
48QT_BEGIN_NAMESPACE
49
50namespace {
51static void construct(QVariant::Private *x, const void *copy)
52{
53 switch (x->type) {
54 case QMetaType::QSizePolicy:
55 v_construct<QSizePolicy>(x, copy);
56 break;
57 default:
58 qWarning(msg: "Trying to construct an instance of an invalid type, type id: %i", x->type);
59 x->type = QMetaType::UnknownType;
60 return;
61 }
62 x->is_null = !copy;
63}
64
65static void clear(QVariant::Private *d)
66{
67 switch (d->type) {
68 case QMetaType::QSizePolicy:
69 v_clear<QSizePolicy>(d);
70 break;
71 default:
72 Q_ASSERT(false);
73 return;
74 }
75
76 d->type = QMetaType::UnknownType;
77 d->is_null = true;
78 d->is_shared = false;
79}
80
81
82static bool isNull(const QVariant::Private *)
83{
84 return false;
85}
86
87static bool compare(const QVariant::Private *a, const QVariant::Private *b)
88{
89 Q_ASSERT(a->type == b->type);
90 switch(a->type) {
91 case QMetaType::QSizePolicy:
92 return *v_cast<QSizePolicy>(d: a) == *v_cast<QSizePolicy>(d: b);
93 default:
94 Q_ASSERT(false);
95 }
96 return false;
97}
98
99static bool convert(const QVariant::Private *d, int type, void *result, bool *ok)
100{
101 Q_UNUSED(d);
102 Q_UNUSED(type);
103 Q_UNUSED(result);
104 if (ok)
105 *ok = false;
106 return false;
107}
108
109#if !defined(QT_NO_DEBUG_STREAM)
110static void streamDebug(QDebug dbg, const QVariant &v)
111{
112 QVariant::Private *d = const_cast<QVariant::Private *>(&v.data_ptr());
113 switch (d->type) {
114 case QMetaType::QSizePolicy:
115 dbg.nospace() << *v_cast<QSizePolicy>(d);
116 break;
117 default:
118 dbg.nospace() << "QMetaType::Type(" << d->type << ')';
119 }
120}
121#endif
122
123static const QVariant::Handler widgets_handler = {
124 .construct: construct,
125 .clear: clear,
126 .isNull: isNull,
127#ifndef QT_NO_DATASTREAM
128 .load: nullptr,
129 .save: nullptr,
130#endif
131 .compare: compare,
132 .convert: convert,
133 .canConvert: nullptr,
134#if !defined(QT_NO_DEBUG_STREAM)
135 .debugStream: streamDebug
136#else
137 0
138#endif
139};
140
141#define QT_IMPL_METATYPEINTERFACE_WIDGETS_TYPES(MetaTypeName, MetaTypeId, RealName) \
142 QT_METATYPE_INTERFACE_INIT(RealName),
143
144static const QMetaTypeInterface qVariantWidgetsHelper[] = {
145 QT_FOR_EACH_STATIC_WIDGETS_CLASS(QT_IMPL_METATYPEINTERFACE_WIDGETS_TYPES)
146};
147
148#undef QT_IMPL_METATYPEINTERFACE_WIDGETS_TYPES
149
150} // namespace
151
152extern Q_CORE_EXPORT const QMetaTypeInterface *qMetaTypeWidgetsHelper;
153
154void qRegisterWidgetsVariant()
155{
156 qRegisterMetaType<QWidget*>();
157 qMetaTypeWidgetsHelper = qVariantWidgetsHelper;
158 QVariantPrivate::registerHandler(name: QModulesPrivate::Widgets, handler: &widgets_handler);
159}
160Q_CONSTRUCTOR_FUNCTION(qRegisterWidgetsVariant)
161
162QT_END_NAMESPACE
163

source code of qtbase/src/widgets/kernel/qwidgetsvariant.cpp