diff options
Diffstat (limited to 'doc/codesnippets/doc/src/snippets/code/src_corelib_kernel_qvariant.cpp')
-rw-r--r-- | doc/codesnippets/doc/src/snippets/code/src_corelib_kernel_qvariant.cpp | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/doc/codesnippets/doc/src/snippets/code/src_corelib_kernel_qvariant.cpp b/doc/codesnippets/doc/src/snippets/code/src_corelib_kernel_qvariant.cpp deleted file mode 100644 index d03b83e80..000000000 --- a/doc/codesnippets/doc/src/snippets/code/src_corelib_kernel_qvariant.cpp +++ /dev/null @@ -1,99 +0,0 @@ -//! [0] -out = QDataStream(...) -v = QVariant(123) // The variant now contains an int -x = v.toInt() // x = 123 -out << v // Writes a type tag and an int to out -v = QVariant("hello") // The variant now contains a QByteArray -v = QVariant(tr("hello")) // The variant now contains a QString -y = v.toInt() // y = 0 since v cannot be converted to an int -s = v.toString() // s = tr("hello") (see QObject::tr()) -out << v // Writes a type tag and a QString to out -... -in = QDataStream(...) // (opening the previously written stream) -in >> v // Reads an Int variant -z = v.toInt() // z = 123 -print ("Type is %s", a v.typeName()) // prints "Type is int" -v = v.toInt() + 100 // The variant now hold the value 223 -v = QVariant(QStringList()) -//! [0] - - -//! [1] -x = QVariant() -y = QVariant(QString()) -z = QVariant(QString("")) -x.convert(QVariant.Int) -// x.isNull() == true -// y.isNull() == true, z.isNull() == false -// y.isEmpty() == true, z.isEmpty() == true -//! [1] - - -//! [2] -variant = QVariant(some_qcolor) -... -color = QColor(variant) -//! [2] - - -//! [3] -color = palette().background().color() -variant = QVariant(color) -//! [3] - - -//! [4] -v = QVariant() - -v.setValue(5) // Not supported by PySide -int i = v.toInt() // i is now 5 -QString s = v.toString() // s is now "5" - -MyCustomStruct c -v.setValue(c) - -... - -MyCustomStruct c2 = v.value<MyCustomStruct>() -//! [4] - - -//! [5] -QVariant v - -MyCustomStruct c // canConvert not supported by PySide -if (v.canConvert<MyCustomStruct>()) - c = v.value<MyCustomStruct>(v) - -v = 7 -int i = v.value<int>() // same as v.toInt() -QString s = v.value<QString>() // same as v.toString(), s is now "7" -MyCustomStruct c2 = v.value<MyCustomStruct>() // conversion failed, c2 is empty -//! [5] - - -//! [6] -QVariant v = 42 - -// canConvert not supported by PySide -v.canConvert<int>() // returns true -v.canConvert<QString>() // returns true - -MyCustomStruct s -v.setValue(s) - -v.canConvert<int>() // returns false -v.canConvert<MyCustomStruct>() // returns true -//! [6] - - -//! [7] -MyCustomStruct s // fromValue not supported by PySide -return QVariant::fromValue(s) -//! [7] - - -//! [8] -QObject *object = getObjectFromSomewhere() -QVariant data = qVariantFromValue(object) // not supported by PySide. -//! [8] |