Question

I’m building a Firefox extension and would like to allow the user to delete objects from the tree with the delete key. I currently call a function when the user presses a button, but would like to allow them to just press the delete key on their keyboard.

Answer 1

Actually, I figured it out. I added this to the tree element in the XUL:

onkeypress="deleteSelection(event);"

Here is my Javascript:

function deleteSelection(event){
  if(event.keyCode == KeyEvent.DOM_VK_DELETE)
  {   
    var t = document.getElementById('gs-scrapeToolbar-middlePanel-dom-tree');
    if (t.currentIndex > -1) {
      treeView.model.splice(t.currentIndex, 1);
      treeView.treeBox.rowCountChanged(t.currentIndex, -1);
    }
  }
}