screenshotupload.mxml

flex 实现的一个showcase 喜欢flex的朋友可以

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas
	xmlns:mx="http://www.adobe.com/2006/mxml"
	
	verticalAlign="middle"
	horizontalAlign="center"
	
	creationComplete="creationCompleteHandler(event);">
	
	
	<mx:Script>
		<![CDATA[
		
			//////////////////////////////////////////////////
			//import
			
			import mx.controls.Alert;
			
			//////////////////////////////////////////////////
			//static constant variables
			
			private static const MAXIMUM_NUMBER_OF_FILES:uint = 6;
			private static const MAXIMUM_FILE_SIZE:uint = 1024 * 25;
		
			//////////////////////////////////////////////////
			//private variables
			
			private var urlRequest:URLRequest;
			private var fileFilter:FileFilter;
			private var fileReferenceList:FileReferenceList;
			
			[Bindable] private var filesToUpload:Array;
			
			//////////////////////////////////////////////////
			//application initialization
			
			private function creationCompleteHandler(event:Event):void {
				urlRequest = new URLRequest("http://flex.org/showcase_beta/drupal/index.php");
				urlRequest.method = "POST";
				
				var data:Object = new Object();
				data.uid = "5";
				
				urlRequest.data = data;
				
				fileFilter = new FileFilter("Image Files (*.gif, *.jpeg, *.jpg, *.png)", "*.gif; jpeg; *.jpg; *.png");
				
				fileReferenceList = new FileReferenceList();
				fileReferenceList.addEventListener(Event.SELECT, selectHandler);
				
				filesToUpload = new Array();
			}
			
			
			//////////////////////////////////////////////////
			//private functions
			
			private function addFiles():void {
				fileReferenceList.browse(new Array(fileFilter));
			}
			
			private function removeFiles():void {
				var selectedItem:Object = dataGrid.selectedItem;
				var index:uint = filesToUpload.indexOf(selectedItem);
				filesToUpload.splice(index, 1);
				
				dataGrid.dataProvider = filesToUpload;
			}
			
			private function uploadFiles():void {
				for (var i:uint = 0; i < filesToUpload.length; ++i) {
					var fileReference:FileReference = filesToUpload[i];
					fileReference.addEventListener(Event.COMPLETE, completeHandler);
					fileReference.addEventListener(DataEvent.UPLOAD_COMPLETE_DATA, uploadCompleteDataHandler);
					fileReference.upload(urlRequest);
				}
				
				Alert.show("Files uploaded successfully.", "File Upload");
				
				clearFiles();
			}
			
			private function clearFiles():void {
				filesToUpload = new Array();
				
				dataGrid.dataProvider = filesToUpload;
			}
			
			
			//////////////////////////////////////////////////
			//handler functions
			
			private function selectHandler(event:Event):void {
				var fileReference:FileReference;
				var fileReferenceList:FileReferenceList = FileReferenceList(event.target);
				
				var fileList:Array = fileReferenceList.fileList;
				if (fileList.length > MAXIMUM_NUMBER_OF_FILES || fileList.length > MAXIMUM_NUMBER_OF_FILES - filesToUpload.length) {
					Alert.show("You've selected more than the maximum number of files allowed.", "File Upload");
				} else {
					var duplicateErrorFileList:Array = new Array();
					var sizeErrorFileList:Array = new Array();
					for (var i:uint = 0; i < fileList.length; ++i) {
						fileReference = FileReference(fileList[i]);
						
						var duplicate:Boolean = false;
						for (var j:uint = 0; j < filesToUpload.length; ++j) {
							var fileToUpload:FileReference = filesToUpload[j];
							if (fileToUpload.name == fileReference.name) {
								duplicate = true;
								break;
							}
						}
						if (duplicate == false) {
							if (fileReference.size > MAXIMUM_FILE_SIZE) {
								sizeErrorFileList.push(fileReference);
							} else {
								filesToUpload.push(fileReference);
							}
						} else {
							duplicateErrorFileList.push(fileReference);
						}
					}
					
					dataGrid.dataProvider = filesToUpload;
					
					var text:String = new String("");
					if (duplicateErrorFileList.length > 0) {
						text += "The following files are already marked for upload:\n\n";
						for (var k:uint = 0; k < duplicateErrorFileList.length; ++k) {
							fileReference = duplicateErrorFileList[k];
							text += "鈥