Hi all,
I have a form with a TextField component and a DropDownChoice
component. The DropDownChoice component has an
AjaxFormComponentUpdatingBehavior("onchange") behavior added.
What I would like to do is to change the color of the text in the
TextField component whenever a DropDownChoice component selection
changes. Everything works fine except of that the text in the
TextField component is reseted to an empty string (that is inital
value) each time the TextField component is added to AjaxRequestTarget
parameter in onUpdate(AjaxRequestTarget) method.
How to preserve the text value in TextField component and only change
the color of the text?
Here is a relevant code snippet:
---
final TextField textField = new TextField("categoryName",
new PropertyModel(categoryModel, "name"));
textField.setOutputMarkupId(true);
textField.add(new AttributeModifier("style", true, new Model() {
public Object getObject(Component component) {
if (category.getType() == CategoryType.HIGH)
return "color:blue;";
else if (category.getType() == CategoryType.LOW)
return "color:red;";
else
return null;
}
}));
add(textField);
DropDownChoice dropDownChoice = new DropDownChoice("categoryType",
new PropertyModel(categoryModel, "type"),
Arrays.asList(CategoryType.values()),
new CategoryTypeChoiceRenderer());
dropDownChoice.add(
new AjaxFormComponentUpdatingBehavior("onchange") {
protected void onUpdate(AjaxRequestTarget target) {
target.addComponent(textField);
}
});
add(dropDownChoice);
---
Thanks,
Dominik
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