FLEX 屏闭系统右键菜单，及在列表控件DataGrid/Tree/List上点右键时自动选择当前行

[原文http://blog.csdn.net/cjy37/article/details/3954516]

第一步：到http://rightclickmanager.googlecode.com/下载rightclickmanager-source-lib-0.1.rar并引入自己的FLEX工程，这是实现右键点击事件，及完全屏闭系统右键菜单的关键！

第二步：打开: <主程序名>.template.html 文件，修改为：

<!--
AC_FL_RunContent(
"src", "${swf}",
"id", "${application}",
"name", "${application}",
"width", "${width}",
"height", "${height}",
"align", "middle",
"menu", "false",
"wmode", "opaque",//注意:这里是右键屏蔽的关键
"quality", "high",
"bgcolor", "${bgcolor}",
"allowScriptAccess", "always",
"allowNetworking", "all",
"allowFullScreen", "true",//是否可全屏的参数
"type", "application/x-shockwave-flash",
"pluginspage", "http://www.adobe.com/go/getflashplayer"
);
//-->

　　

第三步：在主程序文件.as中引入：

import com.siloon.plugin.rightClick.RightClickManager;

并加如下代码：

[Event(name="rightClick",type="fla sh.events.ContextMenuEvent")]
public class index
{

protected var rightClickRegisted:Boolean = false;

public function index()
{
super();

if (!rightClickRegisted)
{
RightClickManager.regist();
rightClickRegisted = true;
}
try
{
name = NameUtil.createUniqueName(this);
}
catch (e:Error)
{
}
return;

}

public override function toString() : String
{
return NameUtil.displayObjectToString(this);
}

　　第四步：在要弹出右键的控件的初始化代码中加入：

NavTabTree.addEventListener(RightClickManager.RIGHT_CLICK,rightClickHandler);

再加以下函数来处理：

/**
* 在控制上单击右键菜单事件的处理函数
* @param event 右键事件
*
*/
protected function rightClickHandler(event:ContextMenuEvent):void
{
onRightClicked(event);
removeMenu();

menu = new Menu();
menu = Menu.createMenu(this, createMenuItems(), false);

menu.labelField="label"
menu.variableRowHeight = true;
//menu.addEventListener(MenuEvent.ITEM_CLICK, menuItemClickHandler);

var point:Point = new Point(mouseX,mouseY);
point = localToGlobal(point);
menu.show(point.x,point.y);
}
/**
* 如果显示过Menu，则先释放资源
*
*/
private function removeMenu():void
{
if(menu!=null)
{
menu.hide();
//menu.removeEventListener(MenuEvent.ITEM_CLICK,menuItemClickHandler);
menu=null;
}
}
/**
* 创建右键菜单选项
* @return 返回选项组成的Array
*
*/
private function createMenuItems():Array
{
var menuItems:Array = new Array();
var menuItem:Object;

menuItem = new Object;
menuItem.label = '清空画布';
menuItem.action = 'clearAll';
menuItems.push(menuItem);

menuItem = new Object;
menuItem.label = '选择背景';
menuItem.action = 'selectBackImage';
menuItems.push(menuItem);

return menuItems;
}
/**
* 当右键单击Tree的Item时，自动选择鼠标所在的当前项
* @param e 自定义右键菜单事件
*
*/
private function onRightClicked(e:ContextMenuEvent):void

{

var rightClickItemRender:IListItemRenderer;

var rightClickIndex:int;

if(e.mouseTarget is IListItemRenderer) {

rightClickItemRender = IListItemRenderer(e.mouseTarget);

}else if(e.mouseTarget.parent is IListItemRenderer) {

rightClickItemRender = IListItemRenderer(e.mouseTarget.parent);

}

if(rightClickItemRender != null) {

rightClickIndex = NavTabTree.itemRendererToIndex(rightClickItemRender);

if(NavTabTree.selectedIndex != rightClickIndex) {

NavTabTree.selectedIndex = rightClickIndex;

}

}
}

　　

第五步：

修改RightClickManager.as文件的

static private var rightClickTarget:*;

再修改两个该文件的两个函数：

static private function mouseOverHandler(event:MouseEvent) : void
{
rightClickTarget = InteractiveObject(event.target);
return;
}

static private function dispatchRightClickEvent() : void
{
var event:ContextMenuEvent;
if (rightClickTarget != null)
{
event = new ContextMenuEvent(RIGHT_CLICK, true, false, rightClickTarget as InteractiveObject, rightClickTarget as InteractiveObject);
rightClickTarget.dispatchEvent(event);
}// end if
return;
}

到这里，功能就完成了，本人修改了RightClickManager的事件从MouseEvent改为ContextMenuEvent是为了能在列表控件DataGrid/Tree/List上点右键时自动选择当前行，使用了ContextMenuEvent事件中的event.mouseTarget和列表控件的IListItemRenderer接口！

本功能也有副作用，系统右键菜单失效，那文本的右键复制粘贴也就失效了，有大量用到TEXTINPUT的就要小心使用了~！