@NotifyChange"
m ((via JWB)) |
m (replace tt with code (via JWB)) |
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| Line 22: | Line 22: | ||
'''Purpose:''' To notify binder one or more properties change. | '''Purpose:''' To notify binder one or more properties change. | ||
| − | By default, a property set by binder through setter method will notify this property changed without this annotation. You could use this annotation on setter method to override default notification target. You could also add this annotation on a command method to notify properties that are changed after command execution. To avoid the default notification, use < | + | By default, a property set by binder through setter method will notify this property changed without this annotation. You could use this annotation on setter method to override default notification target. You could also add this annotation on a command method to notify properties that are changed after command execution. To avoid the default notification, use <code> @NotifyChangeDisabled </code> on setter method solely. Giving "*" in annotation element means notify all properties in a ViewModel. |
Use "." to enforce reloading the instance of the class in where the annotation locates, not an instance's property. | Use "." to enforce reloading the instance of the class in where the annotation locates, not an instance's property. | ||
Revision as of 14:14, 12 January 2022
This article is out of date, please refer to zk-mvvm-book/8.0/syntax/viewmodel/notifychange for more up to date information.
Syntax
@NotifyChange("anotherProperty")
@NotifyChange({"secondProperty","thirdProperty"})
@NotifyChange("*")
@NotifyChange(".")
Description
Target: method (setter or command method)
Purpose: To notify binder one or more properties change.
By default, a property set by binder through setter method will notify this property changed without this annotation. You could use this annotation on setter method to override default notification target. You could also add this annotation on a command method to notify properties that are changed after command execution. To avoid the default notification, use @NotifyChangeDisabled on setter method solely. Giving "*" in annotation element means notify all properties in a ViewModel.
Use "." to enforce reloading the instance of the class in where the annotation locates, not an instance's property.
Example
public class OrderVM {
//other code...
@NotifyChange({"selected","messages"})
public void setSelected(Order selected) {
this.selected = selected;
}
//action command
@NotifyChange({"selected","orders","messages"})
@Command
public void newOrder(){
Order order = new Order();
getOrders().add(order); //add new order to order list
selected = order;//select the new one
}
}
Version History
| Version | Date | Content |
|---|---|---|
| 6.0.0 | February 2012 | The MVVM was introduced. |