Global functions

santoemma · **Posted:** February 2nd, 2006, 12:21 pm

problem: to call a function from anywhere, without including the script object into every page

I believe mine is a common question. I'd like to call this simple function

Code:

function setText(obj, text)
{
  obj.SetSelection(0,-1)
  obj.ReplaceSelection(text)
}

each time I need to set some text on a text object.

So I put it into a Script Object, but this way I should copy the same script into every page.
What is the right way to do this? May I add the function to the "Text Objects" hierarchy? Is there a concept like "global function"?
What's not yet clear to me is the object model of Opus when defining new functions

Regards,
Enrico

Ronnie Dackus · **Posted:** February 2nd, 2006, 12:25 pm

Hi,

Code:

function setText() 
{ 
  obj.SetSelection(0,-1) 
  obj.ReplaceSelection(text) 
} 

Then on a mouseaction insert a script with code:

Code:

setText()

Hope this helps

Ronnie Dackus

Duncan Lilly · **Posted:** February 2nd, 2006, 12:34 pm

Two solutions:

1. Add the script to a master page; in which case a copy is available from every page that uses the master page.

2. In your script object assign a reference to the function to a new member of the publication object:

Code:

function setText()
{
  obj.SetSelection(0,-1)
  obj.ReplaceSelection(text)
}
GetPublication().setText = setText;

You can than use setText() from anywhere. The script that does this should only be evaluated once to avoid any potential issues with different copies of code. (Note the "setText" member of the publication is a reference to setText(), not the same thing - so GetPublication().my_setText = setText; is equally valid, for example and you woul then call my_setText())

Hope this helps.

santoemma · **Posted:** February 2nd, 2006, 1:27 pm

Duncan Lilly wrote:

Two solutions:

2. In your script object assign a reference to the function to a new member of the publication object:

Thank you, now I see that it's quite like Javascript.

I've just tried to use the nicer form:

Code:

Object.prototype.mySetText = setText;

but I couldn't find the Text's object name. When printing an instance Opus says "ILMObject" but than it doesn't recognize this as a class name

Any idea?

Leo Taylor · **Posted:** February 2nd, 2006, 6:35 pm

Hi,

Did you try searching the forum for the word: ILMObject

Have a good one.

Duncan Lilly · **Posted:** February 2nd, 2006, 6:41 pm

santoemma wrote:

Thank you, now I see that it's quite like Javascript.

OpusScript and Javascript are both based on ecmascript.

santoemma wrote:

I've just tried to use the nicer form:

Code:

Object.prototype.mySetText = setText;

but I couldn't find the Text's object name. When printing an instance Opus says "ILMObject" but than it doesn't recognize this as a class name

I'm not sure what you are trying to achieve here. obj.GetName() will return the name of an object.

santoemma · **Posted:** February 3rd, 2006, 11:23 am

Duncan Lilly wrote:

I'm not sure what you are trying to achieve here. obj.GetName() will return the name of an object.

Actually GetName() seems to give the content of the attribute "name" of the class X. The question is: what is X? How one can know the class name given an instance of that class?

Because, having the class name, if Opus is ecmascript, I can say:

Code:

TextObject.prototype.SetText = mySetText;
// assuming that a text widget's class is TextObject

and magically extend the text widgets with my own behaviour.

Before I forget to say it, Duncan, you all have made quite a nice job with Opus. There are a lot of bugs but I'm start loving it

enrico

Digital Workshop

Global functions

Who is online