81 lines
3.4 KiB
HTML
81 lines
3.4 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE html
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html lang="en-us" xml:lang="en-us">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="security" content="public" />
|
|
<meta name="Robots" content="index,follow" />
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
|
<meta name="DC.Type" content="reference" />
|
|
<meta name="DC.Title" content="Editable Comboboxes" />
|
|
<meta name="abstract" content="" />
|
|
<meta name="description" content="" />
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
|
|
<meta name="DC.Format" content="XHTML" />
|
|
<meta name="DC.Identifier" content="combobox" />
|
|
<meta name="DC.Language" content="en-us" />
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
|
<title>Editable Comboboxes</title>
|
|
</head>
|
|
<body id="combobox"><a name="combobox"><!-- --></a>
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">Editable Comboboxes</h1>
|
|
<div><p></p>
|
|
<div class="section"><p>When the bean generator creates a gettor and settor for an Editable
|
|
ComboBox, by default it returns a String on the settor and takes a string
|
|
parameter on the gettor. It can be useful to change the settor to take an
|
|
Object class and the gettor to return an Object type. This allows you to determine
|
|
the user selection using ChoiceDescriptors.</p>
|
|
<p>If a type of Object is detected
|
|
for the gettor and settor, the system will expect either a ChoiceDescriptor
|
|
or a type Object instead of a formatted string.</p>
|
|
<p>The following example
|
|
assumes that Editable is an editable ComboBox that has either a Double value,
|
|
uses a system value, or is not set.</p>
|
|
<pre>public Object getEditable()
|
|
{
|
|
if (m_setting == SYSTEMVALUE)
|
|
{
|
|
return new ChoiceDescriptor("choice1","System Value");
|
|
}
|
|
else if (m_setting == NOTSET)
|
|
{
|
|
return new ChoiceDescriptor("choice2","Value not set");
|
|
}
|
|
else
|
|
{
|
|
return m_doubleValue;
|
|
}
|
|
}</pre>
|
|
<p>Similarly, when a type of Object is detected for the gettor
|
|
and settor, the system will return an Object which is either a ChoiceDescriptor
|
|
containing the selected choice or a type Object.</p>
|
|
<pre> public void setEditable(Object item)
|
|
{
|
|
if (ChoiceDescriptor.class.isAssignableForm(obj.getClass()))
|
|
{
|
|
if (((ChoiceDescriptor)obj).getName().equalsIgnoreCase("choice1"))
|
|
m_setting = SYSTEMVALUE;
|
|
else
|
|
m_setting = NOTSET;
|
|
}
|
|
else if (Double.class.isAssignableFrom(obj.getClass()))
|
|
{
|
|
m_setting = VALUE;
|
|
m_doubleValue = (Double)obj;
|
|
}
|
|
else
|
|
{ /* error processing */ }
|
|
}</pre>
|
|
</div>
|
|
</div>
|
|
|
|
</body>
|
|
</html> |