Hi, I just had the problem alike, where if my list of selectoptions was
empty, optgroup header was shown without any elements below, needed to hide
this optgroup tag:
Instead of developing OptGroup class, I used WebMarkupContainer and
SelectOptions components, together they worked fine for me, here is the java
code:
Select mySelect = new Select("mySelect");
WebMarkupContainer optgroup1WMC = new WebMarkupContainer("optgroup1");
SelectOptions group1 = new SelectOptions("group1", someListOfElements1,
someRenderer1());
optgroup1WMC.add(group1);
optgroup1WMC.setVisible(someBoolVariable1);
mySelect.add(optgroup1WMC);
mySelect.add(group1);
WebMarkupContainer optgroup2WMC = new WebMarkupContainer("optgroup2");
SelectOptions group2 = new SelectOptions("group2", someListOfElements2,
someRenderer2());
optgroup2WMC.add(group2);
optgroup2WMC.setVisible(someBoolVariable2);
mySelect.add(optgroup2WMC);
mySelect.add(group2);
add(mySelect);
and HTML code:
<select wicket:id="mySelect">
<optgroup wicket:message="Optgroup1.propertyname">
<wicket:container wicket:id="group1">
<option wicket:id="option"></option>
</wicket:container>
</optgroup>
<optgroup wicket:message="OptGroup2.propertyname">
<wicket:container wicket:id="group2">
<option wicket:id="option"></option>
</wicket:container>
</optgroup>
</select>
Hope it helps someone in future :)
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