Field with OnChangeAjaxBehavior Not updating.
I am having a bit of trouble making a required form field update from an
ajax button.
The field is marked required and has an OnChangeAjaxBehavior.
The user deletes the contents of the field
Presses an AjaxButton (todo some DB work which yields a new value)
Ajax button sets a new value,
The updated value is not pushed to the screen.
I've got a quick start example.
Tested with Wicket 1.5.5
All help is appreciated.
HomePage.java
package com.mycompany;
import java.math.BigDecimal;
import java.util.Locale;
import org.apache.wicket.AttributeModifier;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.form.OnChangeAjaxBehavior;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.request.mapper.parameter.PageParameters;
import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.Model;
import org.apache.wicket.util.convert.IConverter;
public class HomePage extends WebPage {
/**
* Simulate values from the DB
*/
private BigDecimal fromDBWith = BigDecimal.valueOf(500);
private BigDecimal fromDBWithout = BigDecimal.valueOf(600);
private BigDecimal withPrice = BigDecimal.valueOf(100);
private BigDecimal withoutPrice = BigDecimal.valueOf(200);
ModelBigDecimal withModel = new ModelBigDecimal() {
@Override public BigDecimal getObject() { return withPrice; }
@Override public void setObject(BigDecimal newVal) { withPrice =
newVal; }
};
ModelBigDecimal withoutModel = new ModelBigDecimal() {
@Override public BigDecimal getObject() { return withoutPrice; }
@Override public void setObject(BigDecimal newVal) { withoutPrice =
newVal; }
};
public HomePage(final PageParameters parameters) {
Form form = new Form(someForm);
add(form);
final FeedbackPanel feedback = new FeedbackPanel(feedback);
feedback.setOutputMarkupId(true);
form.add(feedback);
final MoneyTextField withTF = new MoneyTextField(withTF, withModel);
withTF.setOutputMarkupId(true);
// Required AND OnChangeAjaxBehavior means I cant update the form field
from the button
// when the field is empty.
withTF.setRequired(true);
withTF.add(new OnChangeAjaxBehavior() {
@Override public void onUpdate(AjaxRequestTarget art) {
System.out.println(In withTF onUpdate + withPrice);
}
});
form.add(withTF);
final MoneyTextField withoutTF = new MoneyTextField(withoutTF,
withoutModel);
withoutTF.setRequired(true);
withoutTF.setOutputMarkupId(true);
form.add(withoutTF);
AjaxLink withBtn = new AjaxLink(withBtn) {
@Override
public void onClick(AjaxRequestTarget art) {
System.out.println(In withBtn onClick + withPrice);
fromDBWith = fromDBWith.add(BigDecimal.ONE);
withPrice = fromDBWith;
art.add(withTF, feedback);
}
};
form.add(withBtn);
AjaxLink withoutBtn = new AjaxLink(withoutBtn) {
@Override
public void onClick(AjaxRequestTarget art) {
System.out.println(In withoutBtn onClick + withoutPrice);
fromDBWithout = fromDBWithout.add(BigDecimal.ONE);
withoutPrice = fromDBWithout;
art.add(withoutTF, feedback);
}
};
form.add(withoutBtn);
}
}
/**
*
* @author peter
*/
class MoneyTextField extends TextFieldBigDecimal {
public MoneyTextField(String id, IModelBigDecimal model) {
super(id, model, BigDecimal.class);
add(AttributeModifier.append(class, money));
}
@Override public String getInputType() { return number; }
@Override public C IConverterC getConverter(ClassC ctype) {
if (BigDecimal.class.isAssignableFrom(ctype)) {
MoneyConverter mc = new MoneyConverter(false, false);
IConverterC res = (IConverterC)mc;
return res;
//return mc.asInstanceOfIConverterC;
} else {
System.out.println(MoneyConverter NOT ASSIGNABLE FROM + ctype);
return super.getConverter(ctype);
}
}
}
/**
*
* @author peter
*/
class MoneyConverter implements IConverterBigDecimal {
private Boolean blankWhenZero = false;
private Boolean negativeShowCR = false;
public MoneyConverter(Boolean blankWhenZero, Boolean negativeShowCR) {
this.blankWhenZero = blankWhenZero;
this.negativeShowCR = negativeShowCR;
}
@Override public BigDecimal convertToObject(String string, Locale locale)
{
//if (StringUtils.isBlank(string)) {
if (string==null || string.length()==0) {
//return BigDecimal.ZERO;
return null;
}
return new BigDecimal(string);
}
@Override public String convertToString(BigDecimal o, Locale locale) {
System.out.println(MoneyConverter o= + o);
if (o==null) {
return ;
}
if (blankWhenZero o.compareTo(BigDecimal.ZERO)==0) {
How To Catch Network Disconnection In Ajax Buttons
Hi,
How do we catch network disconnection ?
For example, I'm submitting using an indicatingajaxbutton, when the
network is disconnected, the loading indicator disappears and the
button is available again. Is there anyway that I can catch network
disconnections in indicatingajaxbutton or any ajax button for that
matter.
I would like to post an alert warning to the client that he/she has
been disconnected from the server.
Is there anyway that I could insert something into this method?
this is in wicket-ajax.js
failure: function(message) {
if (message != null)
Wicket.Log.error(Wicket.Ajax.Call.failure: Error while
parsing response: + message);
this.request.done();
this.failureHandler();
Wicket.Ajax.invokePostCallHandlers();
Wicket.Ajax.invokeFailureHandlers();
}
Thanks!
Carlo
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Re: Field with OnChangeAjaxBehavior Not updating.
Try calling form.clearInput() after you have updated the value of the
models.
I am having a bit of trouble making a required form field update from an
ajax button.
The field is marked required and has an OnChangeAjaxBehavior.
The user deletes the contents of the field
Presses an AjaxButton (todo some DB work which yields a new value)
Ajax button sets a new value,
The updated value is not pushed to the screen.
I've got a quick start example.
Tested with Wicket 1.5.5
All help is appreciated.
HomePage.java
package com.mycompany;
import java.math.BigDecimal;
import java.util.Locale;
import org.apache.wicket.AttributeModifier;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.form.OnChangeAjaxBehavior;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.request.mapper.parameter.PageParameters;
import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.Model;
import org.apache.wicket.util.convert.IConverter;
public class HomePage extends WebPage {
/**
* Simulate values from the DB
*/
private BigDecimal fromDBWith = BigDecimal.valueOf(500);
private BigDecimal fromDBWithout = BigDecimal.valueOf(600);
private BigDecimal withPrice = BigDecimal.valueOf(100);
private BigDecimal withoutPrice = BigDecimal.valueOf(200);
ModelBigDecimal withModel = new ModelBigDecimal() {
@Override public BigDecimal getObject() { return withPrice; }
@Override public void setObject(BigDecimal newVal) { withPrice =
newVal; }
};
ModelBigDecimal withoutModel = new ModelBigDecimal() {
@Override public BigDecimal getObject() { return withoutPrice; }
@Override public void setObject(BigDecimal newVal) { withoutPrice =
newVal; }
};
public HomePage(final PageParameters parameters) {
Form form = new Form(someForm);
add(form);
final FeedbackPanel feedback = new FeedbackPanel(feedback);
feedback.setOutputMarkupId(true);
form.add(feedback);
final MoneyTextField withTF = new MoneyTextField(withTF, withModel);
withTF.setOutputMarkupId(true);
// Required AND OnChangeAjaxBehavior means I cant update the form field
from the button
// when the field is empty.
withTF.setRequired(true);
withTF.add(new OnChangeAjaxBehavior() {
@Override public void onUpdate(AjaxRequestTarget art) {
System.out.println(In withTF onUpdate + withPrice);
}
});
form.add(withTF);
final MoneyTextField withoutTF = new MoneyTextField(withoutTF,
withoutModel);
withoutTF.setRequired(true);
withoutTF.setOutputMarkupId(true);
form.add(withoutTF);
AjaxLink withBtn = new AjaxLink(withBtn) {
@Override
public void onClick(AjaxRequestTarget art) {
System.out.println(In withBtn onClick + withPrice);
fromDBWith = fromDBWith.add(BigDecimal.ONE);
withPrice = fromDBWith;
art.add(withTF, feedback);
}
};
form.add(withBtn);
AjaxLink withoutBtn = new AjaxLink(withoutBtn) {
@Override
public void onClick(AjaxRequestTarget art) {
System.out.println(In withoutBtn onClick + withoutPrice);
fromDBWithout = fromDBWithout.add(BigDecimal.ONE);
withoutPrice = fromDBWithout;
art.add(withoutTF, feedback);
}
};
form.add(withoutBtn);
}
}
/**
*
* @author peter
*/
class MoneyTextField extends TextFieldBigDecimal {
public MoneyTextField(String id, IModelBigDecimal model) {
super(id, model, BigDecimal.class);
add(AttributeModifier.append(class, money));
}
@Override public String getInputType() { return number; }
@Override publicC IConverterC getConverter(ClassC ctype) {
if (BigDecimal.class.isAssignableFrom(ctype)) {
MoneyConverter mc = new MoneyConverter(false, false);
IConverterC res = (IConverterC)mc;
return res;
//return mc.asInstanceOfIConverterC;
} else {
System.out.println(MoneyConverter NOT ASSIGNABLE FROM + ctype);
return super.getConverter(ctype);
}
}
}
/**
*
* @author peter
*/
class MoneyConverter implements IConverterBigDecimal {
private Boolean blankWhenZero = false;
private Boolean negativeShowCR = false;
public MoneyConverter(Boolean blankWhenZero, Boolean negativeShowCR) {
this.blankWhenZero = blankWhenZero;
this.negativeShowCR = negativeShowCR;
}
@Override public BigDecimal convertToObject(String string, Locale locale)
{
//if (StringUtils.isBlank(string)) {
if (string==null || string.length()==0) {
//return BigDecimal.ZERO;
return null;
}
return new BigDecimal(string);
}
@Override public String
jsessionid is not added to resources if cookies are disabled by the server
Hi Wicket fellows, When I configure the container (either Jetty or Tomcat) to not support cookies, I expect the jsessionid to be added to all resource links in the page. However, with Wicket 1.5.5 this isn't the case, i.e. all URLs are lacking the jsessionid. We are running our application in a setup with one active and one inactive Tomcat instance running in parallel behind a loadbalancer and an Apache. The requests are routed to the worker that is appended to the jsessionid, and if no worker can found it will be route to the currently active instance. This way you can keep sessions stable on a deactivated Tomcat if you deploy a new version to the inactive Tomcat and then switch it to be the active one. Now this leads to a quite random behavior when it comes to resources. Let's say Tomcat A is active and Tomcat B is inactive. If I then deploy a new version of the application to B and switch (i.e. A is inactive, B is active), the users still logged in on A will get the resources served by B because the jsessionid is missing and the requests are thus routed to B as the active instance. This causes strange side effects concerning Javascript, CSS, mounted images etc. In my opinion, this is a bug. I have found a few issues regarding this topic, e.g. https://issues.apache.org/jira/browse/WICKET-4334 and https://issues.apache.org/jira/browse/WICKET-4312. But even if WICKET-4312 seems to say that everything should work as before, I doubt that ;-) Could someone please verify that I'm not missing some configuration or anything? I created a quickstart do demonstrate the behavior - please see the attached file. The file jetty-web.xml tells Jetty to not support cookies, so it can be run with mvn jetty:run without any further configuration. By the way, I found a suggestion to use a custom IResourceCachingStrategy to append the jsessionid (or whatever) to URLs of resources in the archive of this list. Unfortunately, this doesn't work because the URL is encoded afterwards and the ; is turned into %3B :-( Any help is very much appreciated :-) Cheers, Michael jsessionid.tar.gz Description: GNU Zip compressed data - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Wicket AutoComplete example does not work
I just looked at the wicket autocomplete example at http://www.wicket-library.com/wicket-examples/ajax/autocomplete?0 does not work in IE8 or Firefox. Brian Mulholland For every complex problem, there is an answer that is clear, simple and wrong. --H.L. Mencken Politics is the art of looking for trouble, finding it everywhere, diagnosing it incorrectly, and applying the wrong remedies. --Groucho Marx - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Store models short-term
I'm new to Java and Wicket. My only previous experince with web applications
has been with Asp.net forms (not MVC). Please be patient; coming from the
postback event paradigm, I'm struggling to grasp the concepts in Wicket. In my
simple scenario, assume there is no AJAX. I need to build the model from a
database. If I use an LDM, on a postback Wicket calls to the database to
rebuild the model before updating it with the new values. But if I don't use an
LDM, Wicket will serialize the model in the PageMap. I would like to keep the
model 'in memory' long enough to process the postback to avoid unecessary calls
to the database, but release it when I have moved on to a different page. I
thought of something like this... In the LDM @Override
public Object load()
{
...somehow get the session.
if (session.getAttribute(PageAModel)!=null)
{
return (PageAModel)session.getAttribute(PageAModel);
}
else
{
PageAModel pageAModel = ...build from database.
session.setAttribute(PageAModel, PageAModel);
return pageAModel;
}
} Then in the Page... @Override
public void onSubmit()
{
PageAModel pageAModel=(PageAModel)session.getAttribute(PageAModel);
...update the database with PageAModel pageAModel =
(PageAModel)ldm.getObject();
... //removes the model from session?
session.setAttribute(PageAModel)=null;
this.setResponsePage(...);
} I suspect there is a better way to handle this. Can I avoid using an
LDM, but somehow remove the model from the PageMap after leaving the page?
Re: Store models short-term
Hi, Jason. Welcome to Wicket!
If you want to tie an entity to a page, best save the entity within the
page itself. You can do this by using a simple o.a.w.model.Model. If you
don't want to detach between requests, then LDM is not a good fit.
There are use cases where serializing entities at the app level (instead of
the database) makes sense, such as wizards where saving prematurely results
in an invalid data model. However, if your motivation is simply performance
then I suggest you verify your assumptions. Retrieving entities by primary
key is generally very fast, and if it's not fast then it's because it's
really large and you probably don't want that serialized in the session
anyway. The optimization is especially moot in clusters where the
undetached entities are replicated across the network as part of the HTTP
session. And there are other disadvantages such as having to deal with
detached entities, with potentially stale state.
I'll mention one hack for which another Wicket user should rightly
reprimand me. As I mentioned recently, Wicket keeps the most recently
accessed page is a deserialized state to optimize serving the next request.
All components are still detached, but if you override IModel#detach() in
your LDM and suppress super.detach() then your entity will hang around.
This has the behavior you describe, since (1) the entity does not need to
be reloaded on subsequent requests, and since it's object reference is
transient (2) it goes away as soon as another page is accessed, and (3) it
does not get replicated among the cluster.
Best of luck,
Dan
On Fri, May 4, 2012 at 2:40 PM, JASON HOLT j_holt5...@msn.com wrote:
I'm new to Java and Wicket. My only previous experince with web
applications has been with Asp.net forms (not MVC). Please be patient;
coming from the postback event paradigm, I'm struggling to grasp the
concepts in Wicket. In my simple scenario, assume there is no AJAX. I need
to build the model from a database. If I use an LDM, on a postback Wicket
calls to the database to rebuild the model before updating it with the new
values. But if I don't use an LDM, Wicket will serialize the model in the
PageMap. I would like to keep the model 'in memory' long enough to process
the postback to avoid unecessary calls to the database, but release it when
I have moved on to a different page. I thought of something like this... In
the LDM @Override
public Object load()
{
...somehow get the session.
if (session.getAttribute(PageAModel)!=null)
{
return (PageAModel)session.getAttribute(PageAModel);
}
else
{
PageAModel pageAModel = ...build from database.
session.setAttribute(PageAModel, PageAModel);
return pageAModel;
}
} Then in the Page... @Override
public void onSubmit()
{
PageAModel pageAModel=(PageAModel)session.getAttribute(PageAModel);
...update the database with PageAModel pageAModel =
(PageAModel)ldm.getObject();
... //removes the model from session?
session.setAttribute(PageAModel)=null;
this.setResponsePage(...);
} I suspect there is a better way to handle this. Can I avoid using an
LDM, but somehow remove the model from the PageMap after leaving the page?
BookmarkableLinks and masked urls
The problem is that we have a brand new Wicket app, but we have a bunch of
legacy urls that point to different sub domains that the business wants to
preserve. So when the web server sees one of those urls there is a
redirection to the app and that url is preserved, but in the app we have our
own mounts.
Some of those urls could look like:
http://www.sub1.abc.net/param1/param2
http://www.sub2.abc.net/something/param1
Basically my links should point to the legacy urls and I can keep the way
the page parameters are added.
For the mean time I have created a factory that can return external and
bookmarkable links depending on the class name, but I cannot take advantage
of the url coding strategies already available for a specific page.
I would like to go something like:
BookmarkableMaskedPageLink link = new BookmarkableMaskedPageLink(link,
MyPage.class, params);
and I guess the url coding strategy could look like:
MaskedUrlDecoratorStrategy mamboJamboCS =
new MaskedUrlDecoratorStrategy(
http://www.sub2.abc.net/something;
MixedParamUrlCodingStrategy(
mambojambo,
MyPage.class,
new String[]{param1, param2}));
--
View this message in context:
http://apache-wicket.1842946.n4.nabble.com/BookmarkableLinks-and-masked-urls-tp4610114.html
Sent from the Users forum mailing list archive at Nabble.com.
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Re: BookmarkableLinks and masked urls
I think I've done it. I created a MaskedUrlCodingStrategyDecorator that extends from BookmarkablePageRequestTargetUrlCodingStrategy, placed it in the same package, and overrode CharSequence encode(IRequestTarget requestTarget), and used a regular BookmarkablePageLink -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/BookmarkableLinks-and-masked-urls-tp4610114p4610256.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Portlet Support
Has support for portlets been completely dropped from wicket? I was interested to see if I could get a simple portlet running in Liferay - Thanks -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/Portlet-Support-tp4610364.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
