How do I insert Widget from Richcombo ?

How can I insert a widget when one of the dropdown menu in Richcombo is clicked? 

Can I do something like this?

   CKEDITOR.plugins.add('my_plugin', {
    
    	init: function(editor) {
    
    	    editor.ui.addRichCombo('my_plugin', {
    	        label: 'plugin1',
    
    	        init: function() {
    	            this.add('FIRST_NAME', 'FIRST NAME', 'Insert FIRST NAME');
    	        },
    
    	        onclick: function(value) {
    	            editor.widgets.add('widget1', {
    			        template:
    					    '<div class="simplebox">' +
    						    '<h2 class="simplebox-title">Title</h2>' +
    						    '<div class="simplebox-content"><p>Content...</p></div>' +
    					    '</div>'    
                    });      
    	        }
    	    )};
    	}
    });

I also asked this question here http://stackoverflow.com/questions/26475998/ckeditor-4-3-widget-richcombo