看到老外的一篇教程，还不错。推荐给大家，自己也做个记号。首先在第一桢输入：

// Double-Click Hack for List-based components // Nov. 15, 2004 - Darron Schall // create quick reference to ScrollSelectList's prototype var sslp = _global.mx.controls.listclasses.ScrollSelectList.prototype; // only run this code once.., make sure that $oldOnRowPress is not // defined to avoid inifinite recursion when onRowPress is called if (!sslp.$oldOnRowPress) { sslp.DOUBLE_CLICK_INTERVAL = 300; // in milliseconds, how close two clicks must // be received to register as a double click // save a reference to the onRowPress function since we need to overwrite it to add // functionality, and we don't want to lose the original. sslp.$oldOnRowPress = sslp.onRowPress; // add doubleClick event to the ScrollSelectList class sslp.onRowPress = function(rowIndex) { // if the user pressed the samw row within the time limit, fire off if (getTimer()-this.lastPressedTime<this.DOUBLE_CLICK_INTERVAL && this.lastPressedRow == rowIndex) { this.dispatchEvent({target:this, type:"doubleClick", row:rowIndex}); } else { // not a double click - record their click time and the row selected to prepare // for double click // only allow double clicks under the proper conditions if (this.enabled && this.selectable) { this.lastPressedTime = getTimer(); this.lastPressedRow = rowIndex; } else { // not really necessary, but just in case.. make sure // doubleClick doesn't accidentally fire this.lastPressedTime = 0; this.lastPressedRow = -1; } // invoke the old method that we just overwrote - using apply to get the scope correct this.$oldOnRowPress.apply(this, [rowIndex]); } }; } delete sslp;

拖入List组件，命名为“list”

// drag v2 list component onto stage and name it "list" // place above code on frame 1 followed by below code: list.dataProvider = [{label:"test"},{label:"test2"},{label:"test3"}]; list.addEventListener("doubleClick", mx.utils.Delegate.create(this, onItemSelected)); function onItemSelected(eventObj) {   // do something with the selected item   trace("double click"); }

这样就OK了，继承list类的list\tree\datagrid组件均可实现双击~ ^-^

[From darron schall] 原文：http://www.darronschall.com/weblog/archives/000135.cfm