RE: [Wicket-user] wicket 1.2 beta 2 DropDownChoice default display value.. "Please Choose one"

Nino Wael Wed, 05 Apr 2006 04:23:22 -0700

The value of dropDownInitial is not used, instead it uses the first object from the model.

So instead of displaying whats held in dropDownInitial it displays the object from the model.

-regards Nino

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Johan Compagner
Sent: 5. april 2006 13:02
To: [email protected]
Subject: Re: [Wicket-user] wicket 1.2 beta 2 DropDownChoice default display value.. "Please Choose one"

what doesn't work exactly?
Because looking at the code it should work fine. The getDefaultChoice(selected) is called and appended to the output.

johan

P.S. Now i think about it getDefaultChoice is a perfect candidate for returning a CharSequence instead of a string. So that you don't have to call toString() on it.

On 4/5/06, Nino Wael <[EMAIL PROTECTED]> wrote:

I looked at the dialog between Igor and Stefan, thought what a nice way to select the default value with the property model. However and then remembered why it did not do it that way, I wanted to replace the Choose One text with something else, well at least in some cases. Im replacing the text by overriding the getDefaultChoice method. However that doesn't seem to work any longer(im pretty sure I had it working with wicket 1.1.1), see sniplet below? Also I noticed these lines in the documentation :

        // Note that when the selection is null, Wicket will lookup a localized string to

        // represent this null with key: "id + '.null'". In this case, this is 'site.null'

        // which can be found in DropDownChoicePage.properties

        form.add(new DropDownChoice("site", SITES));

Does this mean that I could write in my own version of Please Choose one in the properties file or am I reading it wrong?

/******Sniplet start******/

dropdown = new DropDownChoice("dropdown", DropdownList.toArray()

.getList(), new rowRenderer()) {

protected String getDefaultChoice(Object selected) {

// The <option> tag buffer

final StringBuffer buffer = new StringBuffer();

if (isNullValid()) {

return super.getDefaultChoice(selected);

} else {

// Null is not valid. Is it selected anyway?

if (selected == null) {

// Force the user to pick a non-null value

final String option = dropDownInitial;

buffer

.append(

"\n<option selected=\"selected\" value=\"\">")

.append(option).append("</option>");

}

return buffer.toString();

}

protected void onSelectionChanged(Object newSelection) {

fill.setEnabled(true);

invoke.setEnabled (true);

selectAll.setEnabled (true);

deselectAll.setEnabled (true);

btn_add.setEnabled(true);

btn_remove.setEnabled(true);

info("actionbutton was clicked");

DataItem selected = (DataItem) dropdown.getModelObject();

invoke.setChoices (DropdownList.getNewValues(

selected.getID()).getList());

fill.setChoices(new ArrayList());

}

protected boolean wantOnSelectionChangedNotifications() {

return true;

}

};

/******Sniplet end******/

Regards Nino

RE: [Wicket-user] wicket 1.2 beta 2 DropDownChoice default display value.. "Please Choose one"

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