how to redraw a window?

answered 2006-04-03 02:57:15 +0800

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Orignial message at:
https://sourceforge.net/forum/message.php?msg_id=3665108

By: tomyeh

First, using invalidate is correct to redraw a window. To redraw a page, use page.invalidate(). INNER means only the inner part needs to be updated.

Is logout() called by an event listener?

answered 2006-04-03 06:18:39 +0800

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Orignial message at:
https://sourceforge.net/forum/message.php?msg_id=3665237

By: oberinspector

yes... when a user is already logged in and stored in the session no login form should appear... i have a logout button, onClick calls logout:

<window id = "LoginWindow" title="Login" border="normal" width="300px"
onOk="submit()">
<zscript>
ctt_login = new de.infratour.constraints.Login();
noSessionUser = (Boolean)!ctt_login.hasSessionUser(session);

if(!noSessionUser){
LoginWindow.title=ctt_login.getSessionUserNickname(session);
}
void submit() {
ctt_login.validateLogin(login, login);
LoginWindow.invalidate(LoginWindow.INNER);
}
void logout() {
ctt_login.logout(session);
LoginWindow.invalidate(LoginWindow.INNER);
}
</zscript>

<caption unless="${noSessionUser}">
<toolbarbutton label="logout" onClick="logout()"/> </caption>

<grid if="${noSessionUser}">
<rows>
<row>
Login Name: <textbox id="login" />
</row>
<row>
Passwort: <textbox id="password" type="password" />
</row>
<row>
<button label="Login" onClick="submit()" onOk="submit()"/>
</row>
</rows>
</grid>
</window>

Probably i have to call
noSessionUser = (Boolean)!ctt_login.hasSessionUser(session);
again, before i invalidate the window... i tried to call it direct in the if and unless attributes, but i didnt found the right syntax... :-(

BTW... submit calls my login form constrain, which makes the overall checks of the form and throws the WrongValueException to the texboxes, which caused the error...

answered 2006-04-03 06:25:47 +0800

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Orignial message at:
https://sourceforge.net/forum/message.php?msg_id=3665248

By: oberinspector

and what also doesn't work... i want to submit the form when i press enter on my keyboard... i placed the onOk="submit" in the window and in the button...
nothing happens, when the focus is not on the button...

answered 2006-04-03 06:40:17 +0800

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Orignial message at:
https://sourceforge.net/forum/message.php?msg_id=3665255

By: tomyeh

onOK, not onOk

answered 2006-04-03 06:44:05 +0800

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Orignial message at:
https://sourceforge.net/forum/message.php?msg_id=3665258

By: tomyeh

First, zscript is evaluated only once when the page is loaded. So, you have to update noSessionuser when logout.

Second, EL expression (what is specified in the if and unless attribute) has some limitation that it cannot handle member function calls. I guessed you are hitting this. However, some builtin variables could help you to access attributes, such as

if="${sessionScope.login}"

answered 2006-04-03 06:59:48 +0800

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Orignial message at:
https://sourceforge.net/forum/message.php?msg_id=3665268

By: oberinspector

sessionScope looks fine... Thanks!

answered 2006-04-03 07:31:17 +0800

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Orignial message at:
https://sourceforge.net/forum/message.php?msg_id=3665299

By: oberinspector

<grid if="${sessionScope.SESSION_USER==null}"> is correct evaluated. invalidate forces a redraw, but the if attribute seems not to be evaluated again in this case... when i do a browser reload it works...

answered 2006-04-03 08:08:28 +0800

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Orignial message at:
https://sourceforge.net/forum/message.php?msg_id=3665356

By: tomyeh

Yes, it is evaluated only once.

The whole page is evaluated only once when it is loaded. Then, it reponses to events as you registered.

In your case (to evaluate the whole page again), you have to invoke
page.recreate(null) (see Page's javadoc). It removes all components and recreate them based on the page definition.