@DependsOn"

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(Created page with "{{ZKDevelopersReferencePageHeader}} =Syntax= <source lang="java"> @DependsOn </source> = Description = '''Target:''' getter method '''Purpose:''' To notify change upon propert...")
 
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{{Deprecated | url=[http://books.zkoss.org/zk-mvvm-book/8.0/syntax/dependson.html zk-mvvm-book/8.0/syntax/viewmodel/dependson]|}}
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=Syntax=
 
=Syntax=
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'''Purpose:''' To notify change upon property's dependency.
 
'''Purpose:''' To notify change upon property's dependency.
  
It has the same function as <tt> @NotifyChange </tt> but inverse meaning. It's used to notify binder that getter method's target property is changed because one or more properties it depends on are changed. It can eliminate distributed <tt> @NotifyChange </tt> in a ViewModel when a calculated property depends on multiple properties.
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It has the same function as <code>@NotifyChange</code> but inverse meaning. It's used to notify binder that getter method's target property is changed because one or more properties it depends on are changed. It can eliminate distributed <code>@NotifyChange</code> annotations in a ViewModel when a calculated property depends on multiple properties.
  
 
= Example =
 
= Example =
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=Version History=
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{| class='wikitable' | width="100%"
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! Version !! Date !! Content
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|-
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| 6.0.0
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| February 2012
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| The MVVM was introduced.
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|}
  
  
  
 
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Latest revision as of 07:35, 8 July 2022

Stop.png This article is out of date, please refer to zk-mvvm-book/8.0/syntax/viewmodel/dependson for more up to date information.


Syntax

@DependsOn

Description

Target: getter method

Purpose: To notify change upon property's dependency.

It has the same function as @NotifyChange but inverse meaning. It's used to notify binder that getter method's target property is changed because one or more properties it depends on are changed. It can eliminate distributed @NotifyChange annotations in a ViewModel when a calculated property depends on multiple properties.

Example

public class FullnameViewModel{
	private String firstname;
	private String lastname;
	public String getFirstname() {
		return firstname;
	}
	public void setFirstname(String firstname) {
		this.firstname = firstname;
	}

	public String getLastname() {
		return lastname;
	}
	public void setLastname(String lastname) {
		this.lastname = lastname;
	}
	
	@DependsOn({"firstname", "lastname"})
	public String getFullname() {
		return (firstname == null ? "" : firstname)	+ " "
				+ (lastname == null ? "" : lastname);
	}
}



Version History

Version Date Content
6.0.0 February 2012 The MVVM was introduced.




Last Update : 2022/07/08

Copyright © Potix Corporation. This article is licensed under GNU Free Documentation License.