Within my application I'm using a Scroller component. I can't seem to figure out which event I should set up a listener on in order to know when content is scrolled. I tried Event.CHANGE
on Scroller.verticalScrollBar
property but apparently that event doesn't fire when the user scrolls with a mouse wheel or arrow keys.
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):
问题:
回答1:
You can listen for the propertyChange event on the viewport of the Scroller. Here is an application that demonstrates how this might be done:
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
creationComplete="init()">
<fx:Script>
<![CDATA[
import mx.events.PropertyChangeEvent;
private function init():void {
// spark Scroller: listen on the viewport property
myScroller.viewport.addEventListener(PropertyChangeEvent.PROPERTY_CHANGE, handle);
}
/**
* Handle scroll position changes
*/
private function handle(e:PropertyChangeEvent):void {
if (e.source == e.target && e.property == "verticalScrollPosition")
trace(e.property, "changed to", e.newValue);
if (e.source == e.target && e.property == "horizontalScrollPosition")
trace(e.property, "changed to", e.newValue);
}
]]>
</fx:Script>
<s:Scroller id="myScroller" width="100" height="100">
<s:Group>
<s:Button label="large content" width="300" height="300"/>
</s:Group>
</s:Scroller>
</s:Application>
回答2:
slidePanel.slidesComponentsContainer.slidesList.scroller.addEventListener(
TouchInteractionEvent.TOUCH_INTERACTION_START,
onSlideListVertScrollerTouchInteractionStart
);