RE: [Rails-spinoffs] Prototype Inheritance example

Ryan Gahl Fri, 10 Feb 2006 14:16:13 -0800

If my suggestion did not work then my next thought is that you are not actually defining “MyControls” first.

You can’t define MyControls.TextBox is MyControls is not defined.

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Osborn
Sent: Friday, February 10, 2006 4:00 PM
To: rails-spinoffs@lists.rubyonrails.org
Subject: Re: [Rails-spinoffs] Prototype Inheritance example

Ryan,

Thank you for the quick response. I tried what you suggested and still no luck. I also found in scriptaculous.js another example of inheritance that might also work:

Autocompleter.Local = Class.create();
Autocompleter.Local.prototype = Object.extend(new Autocompleter.Base(),
{
..stuff
});

But that also did not work. Maybe I am creating the base class incorrectly?
There error I keep getting is: MyObject.SubObject is not a constructor (firefox latest)

Thanks again for any help.

On 2/10/06, Ryan Gahl <[EMAIL PROTECTED] > wrote:

You're missing a level of extension in the 2^nd object. It should be…

Object.extend(Object.extend(MyControls.EditableTextbox.prototype, MyControls.TextBox.prototype),

{

…stuff here…

});

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of John Osborn
Sent: Friday, February 10, 2006 1:45 PM
To: Rails-spinoffs@lists.rubyonrails.org
Subject: [Rails-spinoffs] Prototype Inheritance example

Hello Everyone,

I am working on a control collection for _javascript_/Ajax.Net. I am stuck on the class inheritance aspects of the prototype library. If someone could point me to an example it would be a great help. I have looked through the controls.js of the scriptaculous library and found something like the below code, but everytime I ran it I would get a constructor error.

Thanks for any help;

Looking for something like:

MyControls.TextBox = Class.create();
MyControls.TextBox.prototype =
{
baseInitialize: function(loadCallback, saveCallback, saveOptions)
{
    this.loadCallback = loadCallback;
    this.saveCallback = saveCallback;
    ....
},

Save: function()
{
    //do save operation using options
}
};

MyControls.EditableTextBox = Class.create();

Object.extend(MyControls.EditableTextBox.prototype , MyControls.TextBox.prototype),
{
initialize: function(targetObj, loadCallback, saveCallBack, options)
{
    this.baseInitialize(loadCallback, saveCallback);
},

Update: function()
{
     this.Save();
}
}

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--
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jx

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