overrides.js

/**
 * @class ExtMVC.view.scaffold.Index
 * Adds a print button to each grid (remove by setting the hasPrintButton config to false)
 *
 * This is an example in support of http://edspencer.net/2009/07/extoverride-monkey-patching-ext-js.html
 */
(function() {
  var originalBuildTopToolbar = ExtMVC.view.scaffold.Index.prototype.buildTopToolbar;
  
  Ext.override(ExtMVC.view.scaffold.Index, {
    hasPrintButton   : true,
    
    buildTopToolbar: function() {
      var items = originalBuildTopToolbar.apply(this, arguments);
      
      if (this.hasPrintButton === true) {
        /**
         * @property printButton
         * @type Ext.Button
         * The Print grid button
         */
        this.printButton = new Ext.Button({
          text   : 'Print',
          iconCls: 'print',
          scope  : this,
          handler: GetIt.GridPrinter.print.createDelegate(this, [this])
        });

        items.push(this.printButton, '-');
      }
      
      return items;
    }
  );
})();