解决方法
默认情况下,您无法执行此操作.但是,如果扩展ComboBox,则可以轻松添加此功能.这是一个简单的例子,它是一个粗略的版本,可能需要测试/调整,但它显示了如何实现这一目标.
package
{
import mx.controls.ComboBox;
import mx.core.UIComponent;
public class ComboBox2 extends ComboBox
{
public function ComboBox2()
{
super();
}
protected var textInputReplacement:UIComponent;
override protected function createChildren():void {
super.createChildren();
if ( !textInputReplacement ) {
if ( itemRenderer != null ) {
//remove the default textInput
removeChild(textInput);
//create a new itemRenderer to use in place of the text input
textInputReplacement = itemRenderer.newInstance();
addChild(textInputReplacement);
}
}
}
override protected function updateDisplayList(unscaledWidth:Number,unscaledHeight:Number):void {
super.updateDisplayList(unscaledWidth,unscaledHeight);
if ( textInputReplacement ) {
textInputReplacement.width = unscaledWidth;
textInputReplacement.height = unscaledHeight;
}
}
}
}