我有一个 Flash 库,其中的 Sprite 符号由其他带有设计时应用滤镜的 Sprite 组成。我将这些符号嵌入到 Flex 应用程序中,如下所示:
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script>
<![CDATA[
[Bindable]
[Embed(source="Resources.swf", symbol="SquareContainer")]
private var squareContainer_class:Class;
private function log(msg:String):void {
output.text = output.text + "\n" + msg;
}
]]>
</mx:Script>
<mx:VBox horizontalAlign="center" width="100%" height="100%" >
<mx:Image id="squareContainer" source="{squareContainer_class}"/>
<mx:Button click="log(squareContainer.width + ', ' + squareContainer.height);"/>
<mx:TextArea id="output" width="100%" height="100%" />
</mx:VBox>
</mx:Application>
在此示例中,SquareContainer 符号的宽度为 100 像素,高度为 100 像素;但是它包含一个带有发光和模糊滤镜的子 Sprite ,这导致 Sprite 看起来明显大于 100x100。由于我无法确定容器的组成,因此无法使用 BitmapData.generateFilterRect() 获取应用于嵌套 Sprite 的过滤器。
如何获取 Sprite 及其滤镜的大小?
最佳答案
哦,甜蜜的成功! (并感谢您的提示)一位 friend 用一个很好的递归函数帮助解决了这个问题,以处理嵌套 Sprite 上可能存在的过滤器:
private function getDisplayObjectRectangle(container:DisplayObjectContainer, processFilters:Boolean):Rectangle {
var final_rectangle:Rectangle = processDisplayObjectContainer(container, processFilters);
// translate to local
var local_point:Point = container.globalToLocal(new Point(final_rectangle.x, final_rectangle.y));
final_rectangle = new Rectangle(local_point.x, local_point.y, final_rectangle.width, final_rectangle.height);
return final_rectangle;
}
private function processDisplayObjectContainer(container:DisplayObjectContainer, processFilters:Boolean):Rectangle {
var result_rectangle:Rectangle = null;
// Process if container exists
if (container != null) {
var index:int = 0;
var displayObject:DisplayObject;
// Process each child DisplayObject
for(var childIndex:int = 0; childIndex < container.numChildren; childIndex++){
displayObject = container.getChildAt(childIndex);
//If we are recursing all children, we also get the rectangle of children within these children.
if (displayObject is DisplayObjectContainer) {
// Let's drill into the structure till we find the deepest DisplayObject
var displayObject_rectangle:Rectangle = processDisplayObjectContainer(displayObject as DisplayObjectContainer, processFilters);
// Now, stepping out, uniting the result creates a rectangle that surrounds siblings
if (result_rectangle == null) {
result_rectangle = displayObject_rectangle.clone();
} else {
result_rectangle = result_rectangle.union(displayObject_rectangle);
}
}
}
// Get bounds of current container, at this point we're stepping out of the nested DisplayObjects
var container_rectangle:Rectangle = container.getBounds(container.stage);
if (result_rectangle == null) {
result_rectangle = container_rectangle.clone();
} else {
result_rectangle = result_rectangle.union(container_rectangle);
}
// Include all filters if requested and they exist
if ((processFilters == true) && (container.filters.length > 0)) {
var filterGenerater_rectangle:Rectangle = new Rectangle(0,0,result_rectangle.width, result_rectangle.height);
var bmd:BitmapData = new BitmapData(result_rectangle.width, result_rectangle.height, true, 0x00000000);
var filter_minimumX:Number = 0;
var filter_minimumY:Number = 0;
var filtersLength:int = container.filters.length;
for (var filtersIndex:int = 0; filtersIndex < filtersLength; filtersIndex++) {
var filter:BitmapFilter = container.filters[filtersIndex];
var filter_rectangle:Rectangle = bmd.generateFilterRect(filterGenerater_rectangle, filter);
filter_minimumX = filter_minimumX + filter_rectangle.x;
filter_minimumY = filter_minimumY + filter_rectangle.y;
filterGenerater_rectangle = filter_rectangle.clone();
filterGenerater_rectangle.x = 0;
filterGenerater_rectangle.y = 0;
bmd = new BitmapData(filterGenerater_rectangle.width, filterGenerater_rectangle.height, true, 0x00000000);
}
// Reposition filter_rectangle back to global coordinates
filter_rectangle.x = result_rectangle.x + filter_minimumX;
filter_rectangle.y = result_rectangle.y + filter_minimumY;
result_rectangle = filter_rectangle.clone();
}
} else {
throw new Error("No displayobject was passed as an argument");
}
return result_rectangle;
}
关于apache-flex - 在 Sprite 中获取应用于 Flash Sprite 的滤镜范围,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/466280/