You could create a custom component for this if you want to. The whole
idea of Wicket is to make it super easy for users to create their own
components and add the behaviour they want themselves without bloating
the core project too much.
Personally, I would take a different approach though:
Use a variable (like a list) to store your order:
private List componentOrder = new ArrayList();
Override method add to automatically add the order:
/**
* @see wicket.MarkupContainer#add(wicket.Component)
*/
public MarkupContainer add(Component component)
{
super.add(component);
componentOrder.add(component);
return (MarkupContainer)component;
}
Create a comparator that uses this and set it on the FeedbackPanel:
feedback.setSortingComparator(new Comparator()
{
public int compare(Object o1, Object o2)
{
FeedbackMessage m1 = (FeedbackMessage)o1;
FeedbackMessage m2 = (FeedbackMessage)o2;
int ix1 = componentOrder.indexOf(m1.getReporter());
int ix2 = componentOrder.indexOf(m2.getReporter());
return ix1 - ix2;
}
});
I have attached the complete example (an altered version of InputForm
which I am not going to check in) to this email.
Good luck,
Eelco
叶卫国 wrote:
>Eelco Hillenius,您好！
>
> emm.... so can you add a member variable(e.g. "order" or something
> else) to Component class, thus i can set
>the order manually
>
>======= 2005-05-21 19:28:37 您在来信中写道：=======
>
>
>
>>Well... I've discussed this with Johan offline, but that is very hard to
>>do. Even if we had ordering in the child maps, that doesn't mean that
>>that's the order you're going to use them in your markup. And even if
>>you did, by using CSS, the order could be even different from what is in
>>your markup.
>>
>>So, I'm afraid you have to do any sorting this manually, which means
>>that you have to keep track of the order as you want it somewhere.
>>
>>Regards,
>>
>>Eelco
>>
>>
>>
>>叶卫国 wrote:
>>
>>
>>
>>>Eelco Hillenius,您好！
>>>
>>> Adding a sort() method is flexible, but how to sort by the occurrence
>>> order of the form fields ?
>>>
>>>
>>>
>>>
>>>======= 2005-05-17 20:46:42 您在来信中写道：=======
>>>
>>>
>>>
>>>
>>>
>>>>I refactored FeedbackMessages, FeedbackPanel and
>>>>FormComponentFeedbackBorder so that it is easier to use and to extend.
>>>>One of the things I added is that you can now set a comparator on
>>>>FeedbackPanel for any sorting you want.
>>>>
>>>>Good luck,
>>>>
>>>>Eelco
>>>>
>>>>
>>>>-------------------------------------------------------
>>>>This SF.Net email is sponsored by Oracle Space Sweepstakes
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>>>>
>>>>
>>>>
>>>>
>>>= = = = = = = = = = = = = = = = = = = =
>>>
>>>
>>> 致
>>>礼！
>>>
>>>
>>> 叶卫国
>>>[EMAIL PROTECTED]
>>> 2005-05-21
>>>
>>>N?S^甸?X??'????%y*Zq浒y?旦 ?Ф?z?~*於? ??庄zZ)z抚??I?硅龙+???%y*Zq浒y?旦 ?m????,vw(??秀]?Z ??8??'$Z'$z郜z???X?h??标????玷????????(悍 ~?zw?X?襄?b???'$z郜er==
>>>
>>>
>>>
>>
>>-------------------------------------------------------
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/*
* $Id: FormInput.java,v 1.41 2005/05/21 13:31:02 eelco12 Exp $ $Revision:
* 1.20 $ $Date: 2005/05/21 13:31:02 $
*
*
==============================================================================
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package wicket.examples.forminput;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import wicket.Component;
import wicket.FeedbackMessage;
import wicket.MarkupContainer;
import wicket.examples.WicketExamplePage;
import wicket.markup.html.form.CheckBox;
import wicket.markup.html.form.DropDownChoice;
import wicket.markup.html.form.Form;
import wicket.markup.html.form.ImageButton;
import wicket.markup.html.form.ListMultipleChoice;
import wicket.markup.html.form.RadioChoice;
import wicket.markup.html.form.RequiredTextField;
import wicket.markup.html.form.TextField;
import wicket.markup.html.form.model.ChoiceList;
import wicket.markup.html.form.model.IChoice;
import wicket.markup.html.form.validation.IntegerValidator;
import wicket.markup.html.image.Image;
import wicket.markup.html.link.Link;
import wicket.markup.html.panel.FeedbackPanel;
import wicket.model.CompoundPropertyModel;
import wicket.model.PropertyModel;
import wicket.protocol.http.WebRequest;
import wicket.util.convert.IConverter;
/**
* Example for form input.
*
* @author Eelco Hillenius
* @author Jonathan Locke
*/
public class FormInput extends WicketExamplePage
{
/** Relevant locales wrapped in a list. */
private static final List LOCALES = Arrays.asList(new Locale[]
{ Locale.US, new Locale("nl"), Locale.GERMANY ,
Locale.SIMPLIFIED_CHINESE });
/** available numbers for the radio selection. */
private static final List NUMBERS = Arrays.asList(new String[]{"1",
"2", "3"});
/** available sites for the multiple select. */
private static final List SITES = Arrays.asList(
new String[]{"The Server Side", "Java Lobby",
"Java.Net"});
/**
* Constructor
*/
public FormInput()
{
Locale locale = getLocale();
// Construct form and feedback panel and hook them up
final FeedbackPanel feedback = new FeedbackPanel("feedback");
add(feedback);
add(new InputForm("inputForm", feedback));
// Dropdown for selecting locale
add(new LocaleDropDownChoice("localeSelect"));
// Link to return to default locale
add(new Link("defaultLocaleLink")
{
public void onClick()
{
WebRequest request = (WebRequest)getRequest();
setLocale(request.getLocale());
}
});
}
/**
* Sets locale for the user's session (getLocale() is inherited from
* Component)
*
* @param locale
* The new locale
*/
public void setLocale(Locale locale)
{
getSession().setLocale(locale);
}
/**
* Form for collecting input.
*/
private class InputForm extends Form
{
/**
* Keeps the add order for sorting messages.
*/
private List componentOrder = new ArrayList();
/**
* Construct.
*
* @param name
* Component name
* @param feedback
* Feedback display for form
*/
public InputForm(String name, FeedbackPanel feedback)
{
super(name, new CompoundPropertyModel(new
FormInputModel()), feedback);
feedback.setSortingComparator(new Comparator()
{
public int compare(Object o1, Object o2)
{
FeedbackMessage m1 =
(FeedbackMessage)o1;
FeedbackMessage m2 =
(FeedbackMessage)o2;
int ix1 =
componentOrder.indexOf(m1.getReporter());
int ix2 =
componentOrder.indexOf(m2.getReporter());
return ix1 - ix2;
}
});
add(new RequiredTextField("stringProperty"));
add(new RequiredTextField("integerProperty",
Integer.class));
add(new RequiredTextField("doubleProperty",
Double.class));
add(new RequiredTextField("dateProperty", Date.class));
add(new RequiredTextField("integerInRangeProperty",
Integer.class).add(IntegerValidator
.range(0, 100)));
add(new CheckBox("booleanProperty"));
add(new RadioChoice("numberRadioChoice", NUMBERS)
{
protected String getSuffix()
{
return "";
}
});
add(new ListMultipleChoice("siteSelection", SITES));
// as an example, we use a custom converter here.
add(new TextField("urlProperty", URL.class)
{
public IConverter getConverter()
{
return new URLConverter();
}
});
add(new ImageButton("saveButton"));
add(new Link("resetButtonLink")
{
public void onClick()
{
// just call modelChanged so that any
invalid input is cleared.
InputForm.this.modelChanged();
}
}.add(new Image("resetButtonImage")));
}
/**
* @see wicket.markup.html.form.Form#onSubmit()
*/
public void onSubmit()
{
// Form validation successful. Display message showing
edited model.
info("Saved model " + getModelObject());
}
/**
* @see wicket.MarkupContainer#add(wicket.Component)
*/
public MarkupContainer add(Component component)
{
super.add(component);
componentOrder.add(component);
return (MarkupContainer)component;
}
}
/**
* Dropdown with Locales.
*/
private final class LocaleDropDownChoice extends DropDownChoice
{
/**
* Construct.
* @param id component id
*/
public LocaleDropDownChoice(String id)
{
super(id);
// set the model that gets the current locale, and that
is used for updating
// the current locale to property 'locale' of FormInput
setModel(new PropertyModel(FormInput.this, "locale"));
// use a custom implementation of choices, as we want
to display
// the choices localized
ChoiceList locales = new ChoiceList(LOCALES)
{
protected IChoice newChoice(Object object, int
index)
{
return new LocaleChoice((Locale)object,
index);
}
};
setChoices(locales);
}
/**
* @see
wicket.markup.html.form.DropDownChoice#wantOnSelectionChangedNotifications()
*/
protected boolean wantOnSelectionChangedNotifications()
{
// we want roundtrips when a the user selects another
item
return true;
}
/**
* @see
wicket.markup.html.form.DropDownChoice#onSelectionChanged(java.lang.Object)
*/
public void onSelectionChanged(Object newSelection)
{
// note that we don't have to do anything here, as our
property model allready
// calls FormInput.setLocale when the model is updated
// setLocale((Locale)newSelection); // so we don't need
to do this
}
}
/**
* Choice for a locale.
*/
private final class LocaleChoice implements IChoice
{
/** The index of the choice. */
private final int index;
/** The choice model object. */
private final Locale locale;
/**
* Constructor.
* @param locale The locale
* @param index The index of the object in the choice list
*/
public LocaleChoice(final Locale locale, final int index)
{
this.locale = locale;
this.index = index;
}
/**
* @see wicket.markup.html.form.model.IChoice#getDisplayValue()
*/
public String getDisplayValue()
{
String display = locale.getDisplayName(getLocale());
return display;
}
/**
* @see wicket.markup.html.form.model.IChoice#getId()
*/
public String getId()
{
return Integer.toString(index);
}
/**
* @see wicket.markup.html.form.model.IChoice#getObject()
*/
public Object getObject()
{
return locale;
}
}
}
