Within a table cell, I have to create a Wicket ExternalLink that shows the response in a new browser tab.
I’ve used this code (Wicket 7.9):
columns.add(new AbstractColumn<WebService, String>(Model.of(" "))
{
@Override
public void populateItem(Item<ICellPopulator<WebService>> cellItem, String componentId,
IModel<WebService> serviceModel)
{
WebService ows = serviceModel.getObject();
String url = "http://www.geodata.com/map?service=WMS&request=GetCapabilities";
ExternalLink capabilitiesLink =
new ExternalLink(componentId, Model.of(url), Model.of("Caps"))
{
@Override
protected void onComponentTag(ComponentTag tag)
{
super.onComponentTag(tag);
tag.put("target", "_blank");
}
};
cellItem.add(capabilitiesLink);
}
});
But Wicket renders this:
<div onclick="window.location.href='http://www.geodata.com/maps?service=WFS&request=GetCapabilities';return false;" target="_blank">Caps</div>
This doesn’t open a new tab.
The tables HTML markup is generated by Wicket, so I can’t insert
<td><a wicket:id="link" href="..."></a></td> in the corresponding markup.
How can I force Wicket to render <a href=" ... " target="_blank">Caps</a> ?
Alternatively, how can I create a new browser tab when I can’t avoid using onClick (Javascript) ?
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Answer
I solved the problem by creating an extension of Wickets Panel with this simple markup:
<!DOCTYPE html>
<html xmlns:wicket="http://wicket.apache.org">
<head>
<meta charset="UTF-8">
</head>
<body>
<wicket:panel>
<a wicket:id="link"></a>
</wicket:panel>
</body>
</html>
Because of <a wicket:id="link"> Wicket doesn’t create Javascript for the link.
Corresponding Java:
public class LinkTargetBlankPanel extends Panel
{
private static final long serialVersionUID = -6527814402202345257L;
public LinkTargetBlankPanel(String id, String url, String label)
{
super(id);
add(new ExternalLink("link", url, label)
{
private static final long serialVersionUID = -8010560272317354356L;
@Override
protected void onComponentTag(ComponentTag tag)
{
super.onComponentTag(tag);
tag.put("target", "_blank");
}
});
}
}
And in the code that creates the table column:
columns.add(new AbstractColumn<WebService, String>(Model.of(" "))
{
@Override
public void populateItem(Item<ICellPopulator<WebService>> cellItem, String componentId,
IModel<WebService> serviceModel)
{
String url = "http://www.geodata.com/map?service=WMS&request=GetCapabilities";
cellItem.add(new LinkTargetBlankPanel("link", url, "GetCapabilities"));
}
});