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Diffstat (limited to 'doc/src/declarative/scope.qdoc')
-rw-r--r-- | doc/src/declarative/scope.qdoc | 41 |
1 files changed, 39 insertions, 2 deletions
diff --git a/doc/src/declarative/scope.qdoc b/doc/src/declarative/scope.qdoc index c35f3e3..4c613df 100644 --- a/doc/src/declarative/scope.qdoc +++ b/doc/src/declarative/scope.qdoc @@ -43,7 +43,44 @@ \page qmlscope.html \title QML Scope -QML is a \e {dynamically scoped} language. \l {Property Binding}s and \l {ECMAScript Blocks} -are executed +\l {Property Binding}s and \l {ECMAScript Blocks} are executed in a scope chain automatically +established by QML when constructing a component instance. QML is a \e {dynamically scoped} +language. Different object instances instantiated from the same component can exist in +dramatically different scope chains. +\image qml-scope.png + +\section1 Variable object + +Where local variables are stored. Not really applicable to bindings. + +\section1 QML Scope object + +Principally for the \c parent property. + +\code +Item { + anchors.fill: parent +} +\endcode + +vs + +\code +Item { + anchors.fill: this.parent +} +\endcode + +\section1 QML Component chain + +Principally for propogating properties around the component. + +\section1 QmlContext chain + +App provided data. + +\section1 QML Global Object + +Contains all the properties ECMAScript defines, plus some QML ones. Documented \l {QML Global Object}. */ |