无法通过动作脚本正确调整图像大小
问题描述:
嗨我试图在点击缩略图时添加图像。 我知道我必须使用一个侦听器(Event.COMPLETE?),但是当我旋转平板电脑时图像不能正确调整大小。无法通过动作脚本正确调整图像大小
我相信问题在于我无法调整addImage1()函数中的图像大小,因为图像尚未加载,但我无法在侦听器函数中使用newImg.width来重置图像宽度。
任何帮助将不胜感激。 代码如下:-)
<?xml version="1.0" encoding="utf-8"?>
<s:View xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark" title="ZOOM Pictues with Tap"
resize="view1_resizeHandler(event)">
<s:layout>
<s:VerticalLayout/>
</s:layout>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<fx:Script>
<![CDATA[
import mx.events.FlexEvent;
import mx.events.ResizeEvent;
public var hasImageBeenAdded:Boolean = false;
private var imageLastWidth:Number;
private var imageLastHeight:Number;
private var zoomFactor:Number;
private var imageNumber:Number;
private var rhsKeepWidth:int;
private var rhsKeepHeight:int;
private var rhsKeep:Boolean = false;
protected function view1_resizeHandler(event:ResizeEvent):void
{
if(rhsKeepWidth > rhsKeepHeight) // Was Landscape is now Portrait
{
var tmpWidth2:int = rhsKeepWidth;
var tmpHeight2:int = rhsKeepHeight;
rhsKeepWidth = tmpHeight2-lhs.width;
rhsKeepHeight = tmpWidth2+lhs.width;
}
else //Was Portrait is now Landscape
{
var tmpWidth1:int = rhsKeepWidth;
var tmpHeight1:int = rhsKeepHeight;
rhsKeepWidth = tmpHeight1-lhs.width;
rhsKeepHeight = tmpWidth1+lhs.width;
}
addImage1();
}
protected function removeAllImages():void
{
var totalElements : int = rhs.numElements;
for(var i:int=totalElements-1;i>=0;i--)
{
rhs.removeElementAt(i);
}
}
private function onImageLoaded(e:Event):void
{
var zoomFactor1:Number;
var zoomFactor2:Number;
imageLastWidth = e.target.sourceWidth;
imageLastHeight = e.target.sourceHeight;
if(rhsKeep != true) //Need to set the rhs VGroup dimensions
{
rhs.width = hGroup1.width-lhs.width;
rhs.height = hGroup1.height;
rhsKeep = true;
rhsKeepWidth = rhs.width;
rhsKeepHeight = rhs.height;
}
zoomFactor1 = rhsKeepWidth/imageLastWidth;
zoomFactor2 = rhsKeepHeight/imageLastHeight;
if(zoomFactor1 < zoomFactor2)
{
zoomFactor = zoomFactor1;
}
else
{
zoomFactor = zoomFactor2;
}
trace("zoomFactor=" + zoomFactor);
}
public function addImage1():void
{
var i:int;
var newImg:Image = new Image();
removeAllImages();
newImg.source = "images/1.jpg";
newImg.x = 0;
newImg.y = 0;
newImg.addEventListener(Event.COMPLETE,onImageLoaded);
rhs.addElementAt(newImg,0);
hasImageBeenAdded = true;
imageNumber = 1;
trace("Image Width= " + newImg.width);
newImg.scaleX = newImg.scaleY = zoomFactor;
}
]]>
</fx:Script>
<s:HGroup id="hGroup1" width="100%" height="100%">
<s:Scroller id="scrollerL" height="100%">
<s:VGroup id="lhs" width="15%" height="100%" gap="10"
horizontalAlign="center" verticalAlign="top">
<s:Image width="100" height="100" source="thumbs/1.jpg" click="addImage1()"/>
</s:VGroup>
</s:Scroller>
<s:Scroller id="scroller1" height="100%" width="100%">
<s:VGroup id="rhs" height="100%">
</s:VGroup>
</s:Scroller>
</s:HGroup>
</s:View>
答
关于设备的方向,你应该使用:
trace(Stage.deviceOrientation);
trace(Stage.orientation);
它们是只读的字符串输出有关设备的与屏幕的方位信息。您可以手动设置舞台的方向:
Stage.setOrientation(StageOrientation.DEFAULT);
关于图像加载,你需要为Event.COMPLETE的事件监听,你也应该投的内容图片:
var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, function(event:Event):void {
trace("Image loaded");
// Handle code here
// Use: (loader.content as Image)
});
loader.load(new URLRequest("images/1.jpg"));