Binding Class Reference

The Binding element allows arbitrary property bindings to be created. More...

Detailed Description

The Binding element allows arbitrary property bindings to be created.

Since

4.7

Sometimes it is necessary to bind to a property of an object that wasn't directly instantiated by QML - generally a property of a class exported to QML by C++. In these cases, regular property binding doesn't work. Binding allows you to bind any value to any property.

For example, imagine a C++ application that maps an "app.enteredText" property into QML. You could use Binding to update the enteredText property like this.

TextEdit { id: myTextField; text: "Please type here..." }
Binding { target: app; property: "enteredText"; value: myTextField.text }

Whenever the text in the TextEdit is updated, the C++ property will be updated also.

If the binding target or binding property is changed, the bound value is immediately pushed onto the new target.

See also

QtDeclarative

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The documentation for this class was generated from the following file:

• /src/declarative/util/qdeclarativebind.cpp