Re: Basic WO question
Re: Basic WO question
- Subject: Re: Basic WO question
- From: Daniel Mejia <email@hidden>
- Date: Tue, 15 Mar 2005 15:37:01 -0600
Hi,
I found the problem. You must use the Xcode and WO 5.2 with patch
5.2.2. ProjectBuilder is not supported with Mac OS 10.3.
Now the components are initializing just on time.
Thanks,
Daniel.
On Mar 15, 2005, at 6:43 AM, Doug Andrews wrote:
It sounds like your page name is bound to the 'pageName' attribute of
the hyperlinks.
This is the same as programmatically calling pageWithName(myPageName)
in your code, which will create an instance of the page each time.
You should bind your hyperlink to a method in your code instead. (The
'action' attribute of the hyperlink). You can then pass a reference
of page 1 to page 2, and use that to return.
For example, in Main.java, you could have the following method, that
is bound to the 'action' attribute of the hyperlink.
public WOComponent clickedLink()
{
ComponenteTres nextPage =
(ComponenteTres)pageWithName("ComponenteTres");
nextPage.setPrevPage(this);
return nextPage;
}
In your ComponenteTres.java, you will need two methods. The one
above, setPrevPage, and another 'clickedLink' method. You will also
need the class variable 'WOComponent lastPage';
public void setPrevPage(WOComponent lastPage)
{
this.lastPage = lastPage;
}
public WOComponent clickedLink()
{
return lastPage;
}
This way, when the user clicks on the hyperlink on the second page, he
will get the original instance of Main returned to them, instead of a
new instance.
-Doug Andrews
On Mar 15, 2005, at 12:35 AM, Daniel Mejia wrote:
Hi all,
I have a basic question that I know somebody can help me to answer in
this group.
The question is: how many times a component is created in WO
(stateful component). I have a small application with two components,
Main and ComponenteTres. The Main is a very basic page that has only
a WOHyperlink to the ComponenteTres component.
ComponenteTres component is a Form with one field and an action
binded to the sumit button that just print the value in the text
field in the form and a WOHyperlink to go back to the Main page.
Both Components Main and ComponeteTres has a System.out.println in
the constructor to display a message when the component is created.
What I expected was to have just one display from the constructor of
each component, but what I got is a message from the constructor
every time when I access the page and what is more extrange for me is
that when I click in the sumit button in the form of the secod
component I get a message from both, the Main component and the
PageOne component. Is this the expected behaviour?
When I click in the WOHyperlink to go back to the Main page I get a
message from the Main constructor method twice (?).
I'm developing with WO 5.2 and Mac OS 10.3.8.
Regards,
Daniel Mejia.
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J. Daniel Mejia S.
Evolution Technologies, S.A. de C.V.
Teléfono: (81) 8349.5780
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