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Diffstat (limited to 'doc/src/declarative/qmlreusablecomponents.qdoc')
| -rw-r--r-- | doc/src/declarative/qmlreusablecomponents.qdoc | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/doc/src/declarative/qmlreusablecomponents.qdoc b/doc/src/declarative/qmlreusablecomponents.qdoc index 850aaecfc4..9860dd4aa2 100644 --- a/doc/src/declarative/qmlreusablecomponents.qdoc +++ b/doc/src/declarative/qmlreusablecomponents.qdoc @@ -139,5 +139,22 @@ children which is beneficial for certain types of interfaces. However, since to be exposed. \snippet doc/src/snippets/declarative/reusablecomponents/focusbutton.qml document -*/ +\section2 Child Components + +Objects or Items declared within a component can be made accessible by binding their id to a +property alias. + +\snippet doc/src/snippets/declarative/reusablecomponents/Button.qml parent begin +\snippet doc/src/snippets/declarative/reusablecomponents/Button.qml object alias +\snippet doc/src/snippets/declarative/reusablecomponents/Button.qml text +\snippet doc/src/snippets/declarative/reusablecomponents/Button.qml parent end + +The advantage of using an alias instead a property of type of the object is that the value of +the alias cannot be overridden, and members of the object can be used in property bindings when +declaring an instance of the component. +\snippet doc/src/snippets/declarative/reusablecomponents/application.qml grouped property +If a property of type \c Text was used instead of an alias in this instance there would be no +guarantee that \c label would be initialized before the binding was attempted which would cause +the binding to fail. +*/ |