Re: [Wicket-user] Custom date component...

Tue, 10 Oct 2006 16:28:00 -0700

I noticed that this component uses current date as default value. Is it possible to modify it so if one of the fields is not selected the component fails validation?

Thank you,
Alex

On 9/8/06, Andrew Lombardi <[EMAIL PROTECTED]> wrote:
On Sep 7, 2006, at 3:09 PM, Erik Brakkee wrote:

Andrew Lombardi wrote:
Erik,

I had similar issues with the DatePicker for various reasons.  After some help from Nick and Igor I built a 3 dropdown component for choosing date similar to what you describe below.  Check out my blog entry for details on it:

Excellent! This is exactly what I need. By the way, I think a component like this should also be part of wicket extensions. There is no need for a one-size-fits all date component and in practice you encounter many different types of date choosers. The advantage of the dropdown version over the _javascript_ version in my opinion is that you can use the keyboard and that it doesn't give you a popup and force a user to use the mouse.  An experienced user should be able to use the interface with the keyboard only I think.

yeah, having it as a secondary option in wicket-extensions might be nice.  I believe I can create a wicket-contrib project with this on it.  Just so its available somewhere


basically you want to create a DateModel which holds a Date object passed in to your component and override getObject to return the appropriate value based on the field you want, MONTH, DAY_OF_MONTH, YEAR.
[....]
I have just read your blog.  I will try it out tomorrow.
validation would probably be easiest just to use some client-side _javascript_.
Or use the validation support of the FormComponent. I had also looked around a bit and discovered that the problem was that Panel doesn't extend FormComponent. Because of this I was a bit reluctant about writing a component myself because I don't know the APIs for rendering HTML. But I really like your solution. You solved it by implementing the custom component, adding three nested components to it, and then you provide a custom Panel for generating the HTML markup. This is surely an interesting pattern that I would want to use as well.

good deal :)


Cheers
  Erik


Cheers,

andrew

On Sep 7, 2006, at 2:29 AM, Erik Brakkee wrote:

Hi,


I have tried to use the DatePicker component but somehow it doesn't
really work on Firefox 1.5 on linux. For instance, it only shows the
even years, and has strange behavior resetting fields.

Therefore, I want to write my own date component. Very simple, three
drop down choices for year, month, and day of month respectively. I am
now using a Panel component for this. The problem is here that the state
of my DateChooser is represented by three String fields for year, month,
and day of month, whereas my model is represented as a java.util.Date in
the IModel (PropertyModel).

Now, when I make sure that my DropDownChoice implementation has
wantOnSelectionChangedNotification() returning true, I get notified of
every change and in this callback I can set the model to the appropriate
date by using the three String field values as input. Problem is that if
the user doesn't change the date, then no date will be set. Furthermore,
a server round-trip is not necessary so I would like to get rid of this.

I would like to avoid server round trips, make sure the model is set on
submit of the form, and also I would like to use validation of the date
(the day of month could be out of range).  How would I solve this problem?

Cheers
  Erik

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