How to get ListSelect working in multiselect mode?

Vaadin 6 / 7 / 8 Framework UI
1

Hi,

I’ve defined a ListSelect component containing Gene objects. The list is populated as given below:

[code]
genesFld.addContainerProperty(“genename”, String.class, null);
genesFld.setItemCaptionPropertyId(“genename”);

GeneSet gs = new GeneSet();
for (int i=0; i < gs.getGeneSet().size(); i++) {
Gene gene = gs.getGeneSet().get(i);
Item item = genesFld.addItem(gene);
item.getItemProperty(“genename”).setValue(gene.toString());
}
[/code]As a test I want to pre-select two Genes like:

Set<Item> gis = new HashSet<Item>(); gis.add(genesFld.getItem(gs.getGeneSet().get(0))); gis.add(genesFld.getItem(gs.getGeneSet().get(3))); genesFld.setValue(gis); The following commands:

Set<Item> values=(Set<Item>) genesFld.getValue(); System.out.println("SelectList Genes: " + values); do show me the pre-selected Genes!

But, I’d also expect the pre-selected Gene items to be highlighted in the ListSelect component, but they aren’t!
Why?

Regards,
Gerard

P.S. Using Vaadin 7.2.0!

2

Hi,

you should use Item IDs, not Items when setting the value. So you need to change your code to:

Set<Object> gis = new HashSet<Object>(); gis.add(gs.getGeneSet().get(0)); gis.add(gs.getGeneSet().get(3)); genesFld.setValue(gis); -tepi

3

Hi,

Thanks for your answer!

(Sorry for this delayed response!)

Regards,
Gerard