Extending QML - Default Property Example

Default Property.

This example builds on:

• Extending QML - Inheritance and Coercion Example

• Extending QML - Object and List Property Types Example

• Extending QML - Adding Types Example

The Default Property Example is a minor modification of the Extending QML - Inheritance and Coercion Example that simplifies the specification of a BirthdayParty through the use of a default property.

<Code snippet "referenceexamples/default/example.qml:0" not found>

Declaring the BirthdayParty Class

The only difference between this example and the last, is the addition of the DefaultProperty class info annotation.

<Code snippet "referenceexamples/default/birthdayparty.h:0" not found>

The default property specifies the property to assign to whenever an explicit property is not specified, in the case of the BirthdayParty type the guest property. It is purely a syntactic simplification, the behavior is identical to specifying the property by name, but it can add a more natural feel in many situations. The default property must be either an object or list property.

Running the Example

The main.cpp file in the example includes a simple shell application that loads and runs the QML snippet shown at the beginning of this page.

Example project @ code.qt.io