i found a solution to the second question about the text in a tooltip
will show before the animation ends,but i think this is not a very good
idea....
program:
private function iniapp():void{
btn.addEventListener(ToolTipEvent.TOOL_TIP_SHOWN,hideHandler);
}
//btn is a button;
private function hideHandler(evt:ToolTipEvent):void{
ToolTipManager.currentToolTip.text='nice';
evt.toolTip.text='nice';
}
using ToolTipManager or evt.toolTip can both change the text
at first i set the btn's tooltip to null,and have set its width
to a certain value,then using the ToolTipEvent to change tooltip's
text....
