gwt get array button value

Question

My gwt project have flexTable show data of image and button on each row and coll.
But my button won't work properly. this is my current code:

private Button[] b = new Button[]{new Button("a"),...,new Button("j")};
private int z=0;
...
public void UpdateTabelGallery(JsArray str){
    for(int i=0; i str.length(); i++){
    b[i].setText(str.gettitle());                               
    UpdateTabelGallery(str.get(i));                   
  }
}

public void UpdateTabelGallery(GalleryData str){
  Image img = new Image();  
  img.setUrl(str.getthumburl());  

  HTML himage= new HTML("a href="+str.geturl()+">"+ img +"/a>" + b[z] );                                                        
  TabelGaleri.setWidget(y, x, himage);

//is here th right place?
  b[z].addClickHandler(new ClickHandler(){
  @Override
    public void onClick(ClickEvent event) {
      Window.alert("I wan to show the clicked button text" + b[z].getText());               
    }                         
  });

  z++;
}

I'm still confuse where I should put my button handler. With this current code seems the clickhandler didn't work inside a looping. And if I put it outside loop its not working because I need to know which button clicked. I need to get my index button.but how? Is there any option than array button?

thanks

Answer 1

The problem is that you refer to 'z' in your click handler, but the value of z changes, so that when your click handler is actually called the value of z is wrong.

You need a local final variable in UpdateTabelGallery which you assign the current value of z to to allow it to be captured by the handler you create. Even better, get rid of z entirely and pass i to UpdateTableGallery:

public void updateTableGallery(GalleryData str, final int i){
  Image img = new Image();  
  img.setUrl(str.getthumburl());  

  HTML himage= new HTML("a href="+str.geturl()+">"+ img +"/a>" + b[i] );                                                        
  TabelGaleri.setWidget(y, x, himage);

//is here th right place?
  b[i].addClickHandler(new ClickHandler(){
  @Override
    public void onClick(ClickEvent event) {
      Window.alert("I wan't to show the clicked button text" + b[i].getText());               
    }                         
  });

}

But what do you expect:

  HTML himage= new HTML("a href="+str.geturl()+">"+ img +"/a>" + b[i] );       

to do? Aside from the incorrect HTML syntax, I don't think adding ypur button to the string will work.

Answer 2

Did you test this above sample?