I wrote the following component, it can be attached to a submit button.
I edited it a bit so it probably won't compile as it is.
Use it as you will.
Regards,
Erik.
package nl.amsterdam.rbrb.web.component;
import nl.amsterdam.rbrb.util.StringHelper;
import nl.amsterdam.rbrb.web.RbrbApplication;
import org.apache.commons.lang.StringEscapeUtils;
import wicket.ajax.AjaxRequestTarget;
import wicket.ajax.IAjaxCallDecorator;
import wicket.ajax.calldecorator.AjaxPostprocessingCallDecorator;
import wicket.ajax.markup.html.form.AjaxSubmitButton;
import wicket.markup.html.form.Form;
/**
* Ajax button that will show ajax indicator and disable the button.
* Optionally changes the text of the button when it is submitted.
*
* <p>The class of the style is appended with 'disabled'.
* For example class='formbutton' is changed to class='formbuttondisabled'.</p>
*
* <p>Note: the button text is not reverted. It is assumed that the button
* will be refreshed on the screen.</p>
*
* @author erik.van.oosten
*/
public abstract class AutoDisablingAjaxSubmitButton extends AjaxSubmitButton {
private String submittedText;
/**
* @param id the component id (not null)
* @param form the Form (not null)
* @param submittedText the text to display upon submission, or null for no
alternative text
*/
public AutoDisablingAjaxSubmitButton(String id, Form form, String
submittedText) {
super(id, form);
setOutputMarkupId(true);
if (StringHelper.isTrimmedEmpty(submittedText)) {
this.submittedText = null;
} else {
this.submittedText =
StringEscapeUtils.escapeJavaScript(submittedText.trim());
}
}
/** [EMAIL PROTECTED] */
protected IAjaxCallDecorator getAjaxCallDecorator() {
return new
AjaxPostprocessingCallDecorator(super.getAjaxCallDecorator()) {
/** [EMAIL PROTECTED] */
public CharSequence postDecorateScript(CharSequence script) {
// Hide the submit button.
return "var button=wicketGet('" +
AutoDisablingAjaxSubmitButton.this.getMarkupId() + "');"
+ "button.setAttribute('oldClassName',button.className);"
+ "button.setAttribute('oldValue',button.value);"
+
"button.className=button.className+'disabled';button.disabled=true;"
+ (submittedText == null ? "" : "button.value='" +
submittedText + "';")
+ script;
}
/** [EMAIL PROTECTED] */
public CharSequence postDecorateOnFailureScript(CharSequence
script) {
return "var button=wicketGet('" +
AutoDisablingAjaxSubmitButton.this.getMarkupId() + "');"
+ "button.className=button.getAttribute('oldClassName');"
+ "button.value=button.getAttribute('oldValue');"
+ "button.disabled=false;"
+ script
+ "alert('" + FAILURE_ALERT_MESSAGE + "');";
}
/** [EMAIL PROTECTED] */
public CharSequence postDecorateOnSuccessScript(CharSequence
script) {
// Assume that the button is refreshed
return script;
}
};
}
/** [EMAIL PROTECTED] */
protected abstract void onError(AjaxRequestTarget target, Form form);
}
Flavia Paganelli wrote:
> Hi!
>
> I'm working on a page that provides ajax behavior but also supports
> simple request-response without javascript.
> I realized I need a component that provides the behavior of both
> AjaxFallbackLink and AjaxSubmitLink at the same time. On one hand I need
> it to be a submit link, because on click it has to access the data
> entered by the user. And on the other hand I also would like that my
> form worked even when javascript is not enabled.
>
> Both requirements don't seem so odd, so I wonder if someone already had
> the same problem and found a solution for it. I've been looking at the
> classes to try to implement a new component with this characteristics,
> but I got lost.
>
> Maybe there is an alternative solution that I'm not seeing...
>
> Any help will be very much appreciated.
>
> saludos,
>
> Flavia
>
>
--
Erik van Oosten
http://www.day-to-day-stuff.blogspot.com/
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