// add all of the toolbar buttons
_buttons = Lists.newArrayList();
for (int ii = 0; ii < EditorModel.NUM_ACTIONS; ii++) {
// get the button icon images
Tile tile = tbset.getTile(ii);
if (tile != null) {
String cmd = EditorModel.CMD_ACTIONS[ii];
String tip = EditorModel.TIP_ACTIONS[ii];
// create the button