Question

Making a selection from the list

Asked by: hpet

Hi all,

I wonder if what solution can I chose from when I want someone to chose items from a list.
To make it clearer:

In main window you have box and image next to it which will open new window (with items listed in table maner) where you can select one or more items that are at the end included in main window. Since I need some control over this "child" window, like "modal" view so that user can't switch back to main window and browse somewhere else I wonder if there are any other possible solutions to make user chose and close child window before returning to main window. I was thinking if I could include this in main window somehow (hidden layer), but I don't want to load list items infront, ...

hpet

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Asked On
2003-08-26 at 03:36:52ID20720106
Topic

Web Languages/Standards

Participating Experts
2
Points
250
Comments
10

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Answers

 

by: COBOLdinosaurPosted on 2003-08-26 at 07:55:05ID: 9224538

all you have to do is close the child window when focus is returnd to the parent.  you open the window this way:

<script>
function youropenfunc()
{
var x = window.open("url",'',whatever options you use);
}
</script>

Then in the body tag you just need to test to see if the window iexists and is open:

<body onFocus="if (x && !x.closed) x.close()">

Cd&

 

by: hpetPosted on 2003-08-26 at 09:57:55ID: 9225584

What I realy need to check is:
1. before child window closes, IF parent is still opened and on the same page

is this possible?

My situation is like this:
In parent window I need to fill in a form. One field is not editable, but you can select one or more items from dropdown option (which is actualy a new child window). I select one or more items in child window and when clickin on "transmit" (or whatever) these selected items need to transfer to the parent (actualy ID's only, but that is already uninterested detail). That's why I need to insure (somehow) that parent is still there with this specific form child was called from.

Hope this makes it clearer? (or even more complicated :)

Thanks!

 

by: msa2003Posted on 2003-08-26 at 10:36:43ID: 9225950

You could use something like this in the child window:

<body onblur="window.close();">

 

by: COBOLdinosaurPosted on 2003-08-26 at 11:18:42ID: 9226288

Okay you need to handle two thing.  The parent getting closed, and the parent navigating to another page.

In the head you need to save the url of the opener this way:

<script>
originalOpener=false;
function saveOpener()
{
originalOpener=opener.location.href;
}
onload=saveOpener;
</script>


Now to detect the parent being closed on on another site:

if (opener.closed)
{ your code -- the parent has been closed with the X }
else {
 if (opener.location.href != originalOpener)
{ your code -- user has navigated away from the parent page }


Cd&

 

by: msa2003Posted on 2003-08-26 at 11:50:45ID: 9226533

I do not know why, but this sample realy works (opens a modal window in IE and Mozilla):

<html>
<head>
<script>
<!--

var winOpen=false;

var frm1='<table id="form1" cellspacing="0" cellpadding="8">'+
 '<form name="select1" action="main.html" method="get">'+
 '<tr><td bgcolor="#E0E0E0">'+
 '<center>List 1:'+
 '<table cellspacing="1" cellpadding="0" bgcolor="black">'+
 '<tr><td bgcolor="silver"><input type="radio" onclick="ch(this)" id="r11" name="r1" value="1">Switch #1&nbsp;</td></tr>'+
 '<tr><td bgcolor="white"><input type="radio" onclick="ch(this)" id="r12" name="r1" value="2">Switch #2&nbsp;</td></tr>'+
 '<tr><td bgcolor="silver"><input type="radio" onclick="ch(this)" id="r13" name="r1" value="3">Switch #3&nbsp;</td></tr>'+
 '<tr><td bgcolor="white"><input type="radio" onclick="ch(this)" id="r14" name="r1" value="4">Switch #4&nbsp;</td></tr>'+
 '<tr><td bgcolor="silver"><input type="radio" onclick="ch(this)" id="r15" name="r1" value="5">Switch #5&nbsp;</td></tr>'+
 '</table></center></td></tr>'+
 '</form></table>';

var head1='<html><head><script>'+
 'function ch(el) { opener.changeForm(el); }'+
 '</script></head>'+
 '<body leftmargin="0" topmargin="0" style="margin: 0;" onunload="opener.winOpen=false;" onblur="window.focus();">';

function changeForm(el)
{
 var d=document;
 if (d.getElementById) d.getElementById(el.id).click();
}

function openWindow()
{
 var d,f,h,w;
 if ((d=document).getElementById) {
  f=d.getElementById('form1');
  h=f.offsetHeight;
  w=f.offsetWidth;
 } else { w=150; h=200; }
 win=window.open('about:blank','','height='+h+',width='+w+',scrollbars=no,toolbar=no,status=no,menubar=no,location=no');
 d=win.document;
 d.open();
 d.write(head1+frm1+'</body></html>');
 d.close();
 winOpen=true;
}

function ch() {}

//-->
</script>
</head>
<body onfocus="if (winOpen) { win.focus(); }">
<img src="image.gif" onclick="openWindow()">
<br><br><br><br><br><br><br><br><br><br><br><br>
<script><!--
document.write(frm1);
//--></script>
</body>
</html>

This sample uses radio buttons and may seem to be little complex, but the most essential parts could be extracted this way:

In opener (parent) window:

<html>
<head>
<script>
<!--

var winOpen=false;

function openWindow()
{
 ...

 win=window.open(...);

 ...
 
 winOpen=true;
}

//-->
</script>
</head>
<body onfocus="if (winOpen) { win.focus(); }">

...

</body>
</html>

In child window:

...

<body leftmargin="0" topmargin="0" style="margin: 0;" onunload="opener.winOpen=false;" onblur="window.focus();">

...

Best regards
Serge

 

by: msa2003Posted on 2003-08-26 at 13:19:40ID: 9227295

Cd&,

If you need just to check if the parent window had changed this could be enough:

---- 1.html (opener) ----

<html>
<head>
<script>var w=false;</script>
</head>
<body onunload="if (w) w.opener=false;">
<form><input type="button" onclick="w=window.open('2.html');" value="Open window"></form>
</body>
</html>

---- 2.html (child window) ----

<html>
<body>
<form><input type="button" onclick="if (!opener) alert('The page opener has been closed or changed!');" value="Check opener"></form>
</body>
</html>

It is essential to put child window's 'opener' property to 'false' when the user tries to close the window, reload or navigate to another page. In the child window, you just need to check the 'opener' property. This is safe enaugh because it does not lead to security alerts (usage of opener.location could lead the 'cross-domain' security issue if the user will desire to navigate to another site).

 

by: COBOLdinosaurPosted on 2003-08-26 at 14:07:17ID: 9227713

Setting the opener false works in IE5.5, but I can't get it to work for Mozilla so it would be an IE only hack.  I say hack because it think that opener is supposed to be read only.

Cd&

 

by: msa2003Posted on 2003-08-26 at 22:33:58ID: 9229946

Cd&:

Sorry,

---- 1.html (opener) ----

<html>
<head>
<script>var w=false;</script>
</head>
<body onunload="if (w) w.openerRemains=false;">
<form><input type="button" onclick="w=window.open('2.html');w.openerRemains=true;" value="Open window"></form>
</body>
</html>

---- 2.html (child window) ----

<html>
<body>
<form><input type="button" onclick="if (!openerRemains) alert('The page opener has been closed or changed!');" value="Check opener"></form>
</body>
</html>

P. S. I tried my previous sample in Mozilla again, and it works! Moreover it works in Opera 7. But it doesn't work in the previous versions of Netscape (tried in NN4, NN6). The updated solution (used 'openerRemains' property instead) seems to work in any browser.

P. P. S. MSDN says:

> HTML N/A
> Scripting window.opener [ = sWindow ]  

> sWindow String that specifies the window reference.

> The property is read/write with no default value.

So, I can't consider it to be a hack! But it seems to work in IE 5.0 and higher.

20120131-EE-VQP-002

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