AS3: Flex: [Bindable]
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Note: this is intended for those who are already well versed in AS3 code
The [Bindable] attribute is used in Flex and ActionScript to define a variable or property of an object that is automatically updated when the bound data changes. This allows you to create connected components that automatically respond to data changes and update their state and display.
To use the [Bindable] attribute, you must place it before the declaration of the variable or property that you want to bind. For example:
[Bindable] public var test:String;
This code declares the variable test to be bound. Now any changes to the value of this variable will be automatically reflected in the components that are associated with it.
The [Bindable] attribute can be applied not only to variables, but also to class or component properties. It is widely used in Flex to implement the data model and data binding between interface components and data sources.
public class MyModel {
[Bindable]
public var name:String;
[Bindable]
public var age:int;
}
Now you can safely access these variables in elements, as an example:
<s:Label text="{test}"/>
to use a variable in attributes you need to place the variable name in {}
it can also be used for updating, for example, make a variable updated with a function call
[Bindable(event="dataChange")] public var test:String;
You can also update class properties when calling a function:
[Bindable(event="dataChange")]
public class MyModel {
public var name:String;
public var age:int;
}
Summary
you learned how to use the [Bindable] meta tag
That's all for now, thanks for your attention, this is made for AS3 Main: Tutorials and Resources
