How to add Anchor with clickHandler to ListGridRecord in GWT

Question

I need to add Anchor with clickHandler to ListGridRecord. Click to Anchor should call the function (adding more rows to ListGrid). I'm able to write Anchor with href:

private void addAnchorToRecord(ListGridRecord rec) {
    String img  = "<img src='pict/Plus.png'/>";
    Anchor myAnchor = new Anchor(img, true, "example.html");
    String value = myAnchor.toString();
    rec.setAttribute("versions", value);
}

But this code:

private void addAnchorToRecord(final ListGridRecord rec) {
    String img  = "<img src='pict/Plus.png'/>";
    Anchor myAnchor = new Anchor(img, true);
    myAnchor.addClickHandler(new ClickHandler() {
           @Override
           public void onClick(ClickEvent event) {
               addExtraRows(rec);
           }
        });
    String value = myAnchor.toString();
    rec.setAttribute("versions", value);
}

doesn't work. I see image, but after click nothing happens. In second case

value = "<a href="javascript:;" class="gwt-Anchor"><img src="pict/Plus.png"></a>"

I think in this place i lose information about clickHandler. How can I succesful add ClickHandler in this situation?

EDIT

I used LinkItem:

private void updateVersions(final ListGridRecord rec) {
    LinkItem linkItem = new LinkItem("link");  
    linkItem.setTitle("LinkItem");  
    linkItem.setLinkTitle("Click Me");  
    linkItem.addClickHandler(new ClickHandler() {

        @Override
        public void onClick(ClickEvent event) {
            showPreviousVersions(rec);
        }
    });
    rec.setAttribute("versions", linkItem);
}

Then in my cell was only "[object Object]"

Functionality I need: set attribute to ListGridRecord, which has icon and clickHandler.

Answer 1

Its easier if you just add a button in the ListGridRecord and then add a clickhandler to the button. It must be done like this:

When configuring the ListGrid:

    setShowRecordComponents      (true );
    setShowRecordComponentsByCell(true );

When setting fields

    ...
    ListGridField btnField= new ListGridField("btnFieldName", " ");
    ...

And then just override createRecordComponent like this:

 @Override
 protected Canvas createRecordComponent(final ListGridRecord record, final Integer colNum){
        if(getFieldName(colNum).equalsIgnoreCase(("btnFieldName"))){
               IButton btn= new IButton("");
               //configure the button
               btn.addClickHandler(new ClickHandler() {
                  @Override
                  public void onClick(ClickEvent event) {
                    //your logic
                  }
               });
               return btn;
         }
     return super.createRecordComponent(record, colNum);
 }