CODEWITHSUNDEEP
javaselectiontapestry
MartinC
MartinC

Reputation: 556

how to refer to the property of bean used in BeanEditForm (tapestry5) in Java?

I've got in my .tml file something like this:

<t:beaneditform t:id="adForm" object="editableAd"
                        reorder="actiontype,shops,movies,streams,widgets" ....

My question is how to access (refer) actionType, which is an Enum (and in fact SELECT) in .java file? I just need to handle event when user changes the value of this select (dropdown), obviously before submitting the form itself.

If something like this would work for me...

@OnEvent(component = "adForm.actionType", value=EventConstants.VALUE_CHANGED)
    public void actionTypeValueChanged(String value) {
      log.info("value is: " + value);
    }

Upvotes: 0

Views: 597

Answers (2)

Nicolas Barrera
Nicolas Barrera

Reputation: 527

If you don't mind using the ChenilleKit framework for tapestry you could try using the framework's OnEvent mixin.

You 'll find the example on the link I share but basically you add two attributes the select tag:

<t:select t:id="myselect" ... t:mixins="ck/OnEvent" t:event="change" />

then you add the event handler on your java class:

@OnEvent(component="myselect", value='change')
public void onChangeDoSomething(String value) {

hope that helps, by the way I think Muhammad's answer is equally correct (and doesn't requires the use of an extra framework).

Upvotes: 0

Muhammad Gelbana
Muhammad Gelbana

Reputation: 4000

To be updated with the changed value in a Select html component on the client side, have a tapestry select component in your template file with a t:zone attribute (i.e. in your case it could point to any dummy zone, this is only needed to be set correctly if you need to update a zone when a value is changed)

Also set the t:value attribute to your enum variable in your page\component java file, usually this variable will be annotated with tapestry's @Property.

Example:

<t:select t:id="myEnumVariable" t:zone="dummyZone" t:value="myEnumVariable"/>

myEnumVariable is used to refer to your class's variable AND to act as an ID (i.e. the actual string myEnumVariable is used as an id), this is not necessary, but it's more readable and maintainable that way)

public class MyClass{
    @Property
    private MyEnum myEnumVariable;

    @OnEvent(component = "myEnumVariable", value=EventConstants.VALUE_CHANGED)
    public void actionTypeValueChanged(**MyEnum** newValue) {
        this.myEnumVariable = newValue; // <<<<<<
        log.info("value is: " + myEnumVariable );
    }
}

Upvotes: 1

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