Question

Flex3有什么办法在Panel的右上角添加关闭按钮

Answer 1

你看一下titlewindow的部分代码，
public class TitleWindow extends Panel
{
include "../core/Version.as";

//--------------------------------------------------------------------------
//
// Class mixins
//
//--------------------------------------------------------------------------

/**
* @private
* Placeholder for mixin by TitleWindowAccImpl.
*/
mx_internal static var createAccessibilityImplementation:Function;

//--------------------------------------------------------------------------
//
// Constructor
//
//--------------------------------------------------------------------------

/**
* Constructor.
*/
public function TitleWindow()
{
super();
}

//--------------------------------------------------------------------------
//
// Properties
//
//--------------------------------------------------------------------------

//----------------------------------
// showCloseButton
//----------------------------------

[Inspectable(category="General")]

/**
* Whether to display a Close button in the TitleWindow container.
* The default value is <code>false</code>.
* Set it to <code>true</code> to display the Close button.
* Selecting the Close button generates a <code>close</code> event,
* but does not close the TitleWindow container.
* You must write a handler for the <code>close</code> event
* and close the TitleWindow from within it.
*
* @default false
*
* @tiptext If true, the close button is displayed
* @helpid 3986
*/
public function get showCloseButton():Boolean
{
return mx_internal::_showCloseButton;
}

/**
* @private
*/
public function set showCloseButton(value:Boolean):void
{
mx_internal::_showCloseButton = value;
}

titlewindow就是由panel继承来的，上面让closebutton显示

所以直接用titlewindow 就行了，或者自己参照titlewindow的source自己再写一个。