how to define a conditional xp:confirm? - xpages

Question

I would like to use the xp:confirm action on a conditional status. Is there a way to compute the rendered property of this control?
I can compute the rendered property for the whole xp:eventHandler but not for an xp:actionGroup or xp:confirm.

Answer 1

xp:confirm just adds client-side JavaScript to the button with:
if (!XSP.confirm("YOUR MESSAGE")){
return false;
}
XSP.confirm() is an XPages wrapper for JavaScript confirm. The most flexible approach is to code the client-side JavaScript you want on the "Client" tab of the button, doing return false to prevent the button sending to the server as required.

Answer 2

This is a very synthetic snippet which you however can fit to your needs, if I got you right and if it suits your use case. Not so elegant, but works.
<xp:panel id="mainPanel">
<xp:button id="myBtn1"
value="Ask confirmation on submit">
<xp:eventHandler event="onclick" submit="true"
refreshMode="partial" refreshId="mainPanel">
<xp:this.action>
#{javascript:
requestScope.put('myAnyVar', 'askConfirmation');
}
</xp:this.action>
</xp:eventHandler>
</xp:button>
<xp:button id="myBtn2"
value="Dont ask confirmation on submit">
<xp:eventHandler event="onclick" submit="true"
refreshMode="partial" refreshId="mainPanel">
<xp:this.action>
#{javascript:
requestScope.put('myAnyVar','dontAskConfirmation');
}
</xp:this.action>
</xp:eventHandler>
</xp:button>
<input type="hidden" id="doConfirm"
value="#{requestScope.myAnyVar eq 'askConfirmation' ? '1' : '0'}">
</input>
</xp:panel>
<br />
<br />
<xp:button id="btnSubmit"
value="Submit">
<xp:eventHandler event="onclick" submit="true"
refreshMode="complete">
<xp:this.script>
var confirmOption = dojo.byId('doConfirm').value;
if (confirmOption === '1') {
if (confirm('Proceed the submit?')) {
return true;
} else {
return false;
}
} else {
return true;
}
</xp:this.script>
<xp:this.action>
#{javascript:
viewScope.smthSubmitted = new java.util.Date();
}
</xp:this.action>
</xp:eventHandler>
</xp:button>
<br />
<br />
<xp:text value="Submit time: #{viewScope.smthSubmitted}" />