diff options
Diffstat (limited to 'doc/src/examples/qtscriptcustomclass.qdoc')
| -rw-r--r-- | doc/src/examples/qtscriptcustomclass.qdoc | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/doc/src/examples/qtscriptcustomclass.qdoc b/doc/src/examples/qtscriptcustomclass.qdoc index f825ad9..028c7a6 100644 --- a/doc/src/examples/qtscriptcustomclass.qdoc +++ b/doc/src/examples/qtscriptcustomclass.qdoc @@ -120,6 +120,8 @@ this ByteArrayClass object, so that the constructor, when it is invoked, can extract the pointer and use it to create a new \c{ByteArray} object. + \snippet examples/script/customclass/bytearrayclass.cpp 10 + \snippet examples/script/customclass/bytearrayclass.cpp 1 The newInstance() function isn't part of the QScriptClass API; its purpose is to offer @@ -128,6 +130,11 @@ QScriptEngine::newObject() will call the prototype() function of our class, ensuring that the prototype of the new object will be the standard \c{ByteArray} prototype. + QScriptEngine::reportAdditionalMemoryCost() is called to inform the script engine of the + memory occupied by the QByteArray. This gives the garbage collector a hint that it should + perhaps trigger more frequently, possibly freeing up memory associated with large ByteArray + objects that are no longer in use. + \snippet examples/script/customclass/bytearrayclass.cpp 2 construct() is the native function that will act as a constructor for \c{ByteArray} @@ -159,6 +166,12 @@ array index that was calculated in the queryProperty() function, enlarge the array if necessary, and write the given value to the array. + \snippet examples/script/customclass/bytearrayclass.cpp 9 + + The resize() function is a helper function that resizes the QByteArray to a new size, and, + if the new size is greater than the old, reports the additional memory cost to the script + engine. + \snippet examples/script/customclass/bytearrayclass.cpp 6 The propertyFlags() reimplementation specifies that the \c{length} property can't be deleted, |