gistfile1.js

	_currSelGuid: null, // keep track of current selection guid
	
	// myController.addProbe(selection)
	refreshRecordWhenSelected: function () {
		// cannot observe selection for changes because of SC.SelectionSupport#updateSelectionAfterContentChange in sproutcore/mixins/selection_support.js
		// if (!this.didChangeFor('refreshRecordWhenSelected', 'selection')) { return ; }
		var sel = this.get('selection'),
		record = null ;
		if (sel.length == 1) {
			record = sel.first() ;
		} else {
			this.set('_currSelGuid', null) ; // empty current selection
			return ; // empty selection or invalid number of selections
		}
		// check if record is different from current selection 
		if (record.guid != this.get('_currSelGuid')) {
			if (!record.newRecord) { record.refresh(); }
			this.set('_currSelGuid', record.guid) ; // set current selection for selection observation
		}
	}.observes('selection')