Skip to content
Permalink
Browse files
Adding ImageGate component to my whiteboard
git-svn-id: https://svn.apache.org/repos/asf/incubator/flex/whiteboard@1380426 13f79535-47bb-0310-9956-ffa450edef68
  • Loading branch information
Nicholas Kwiatkowski committed Sep 4, 2012
1 parent 66b6dcb commit 31686a635228bc36ad1f061151e67914c91b2534
Showing 1 changed file with 303 additions and 0 deletions.
@@ -0,0 +1,303 @@
////////////////////////////////////////////////////////////////////////////////
//
// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////
// Original component created by Dan Florio (http://www.polygeek.com), and donated
// via Nick Kwiatkowski (quetwo) to the Apache Flex Project
////////////////////////////////////////////////////////////////////////////////

package org.apache.components
{

import flash.display.Bitmap;
import flash.display.Loader;
import flash.events.Event;
import flash.events.IOErrorEvent;
import flash.filesystem.File;
import flash.filesystem.FileMode;
import flash.filesystem.FileStream;
import flash.net.URLLoader;
import flash.net.URLLoaderDataFormat;
import flash.net.URLRequest;
import flash.system.Capabilities;
import flash.utils.ByteArray;

import spark.primitives.BitmapImage;

public class ImageGate extends BitmapImage
{

private var _urlRequest:URLRequest;
private var _urlLoader:URLLoader;
private var _loader:Loader;
private var _fileStream:FileStream;

private var _url:String;
private var _filename:String;
private var _file:File;

private var _assetURL:String;
private var _assetURL160:String;
private var _assetURL240:String;
private var _assetURL320:String;

private var _localFolder:String;

public function ImageGate()
{
super();
}

private function findImage():void
{

/**
* The _localFolder must be set in order to proceed.
*/
if (_localFolder == null)
{
return;
}

var gotAllMultiScreenURLs:Boolean = false;

if (_assetURL160 != null
&& _assetURL240 != null
&& _assetURL320 != null)
{

gotAllMultiScreenURLs = true;
}

/**
* If we don't have either of the _assetURL or all of the
* multi-screen URLs then we can not proceed.
*/
if (_assetURL == null && !gotAllMultiScreenURLs)
{
return
}

if (_assetURL == '')
{
return
}

/**
* Check to see what the _url is going to be for this particular image.
* -If _assetURL != null then use that url.
* -Otherwise find the correct _url based on the current screen resolution.
*/

if (_assetURL != null)
{
_url = _assetURL;
}
else if (Capabilities.screenDPI >= 280)
{
_url = _assetURL320
}
else if (Capabilities.screenDPI >= 200)
{
_url = _assetURL240
}
else
{
_url = _assetURL160
}

_filename = _url.substring(_url.lastIndexOf('/') + 1);

if (Capabilities.os.toLowerCase().indexOf('iphone') != -1 || Capabilities.os.toLowerCase().indexOf('ipad') != -1 || Capabilities.os.toLowerCase().indexOf('ipod') != -1)
{
// Store the downloaded files in the Cache directory on iOS devices only. This is to comply with the
// new AppStore guidelines that are in effect as of iOS 5.1
_file = new File(File.applicationDirectory.nativePath + "/\.\./Library/Caches").resolvePath(_localFolder + '/' + _filename);
}
else
{
// Store the downloaded files in the applicationStorage Directory.
_file = File.applicationStorageDirectory.resolvePath(_localFolder + '/' + _filename);
}

if (_file.exists)
{
var byteArray:ByteArray = new ByteArray();
_fileStream = new FileStream();
_fileStream.open(_file, FileMode.READ);
_fileStream.readBytes(byteArray);
_fileStream.close();
_fileStream = null;
_file = null;

_loader = new Loader();
_loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onBytesLoaded);
_loader.loadBytes(byteArray);

}
else
{
downloadRemoteFile();
}
}

private function onBytesLoaded(e:Event):void
{
this.source = new Bitmap(e.target.content.bitmapData);
_loader.contentLoaderInfo.removeEventListener(Event.COMPLETE, onBytesLoaded);

// Cleanup
_loader = null;
_filename = null;
}


private function downloadRemoteFile():void
{
_urlLoader = new URLLoader();
_urlRequest = new URLRequest(_url);
_urlLoader.dataFormat = URLLoaderDataFormat.BINARY;
_urlLoader.addEventListener(Event.COMPLETE, onDownloadComplete);
_urlLoader.addEventListener(IOErrorEvent.IO_ERROR, onIOerror);
_urlLoader.load(_urlRequest);
}

private function onDownloadComplete(e:Event):void
{
var byteArray:ByteArray = _urlLoader.data;
_fileStream = new FileStream();
_fileStream.open(_file, FileMode.WRITE);
_fileStream.writeBytes(byteArray, 0, byteArray.length);
_fileStream.close();

_loader = new Loader();
_loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onBytesLoaded);
_loader.loadBytes(byteArray);

// Cleanup
_urlLoader.close();
_urlLoader = null;
_fileStream = null;
_urlRequest = null;
_url = null;
}

private function onIOerror(e:IOErrorEvent):void
{
trace("image download error : " + _url + " : " + _filename);

// Cleanup
_urlLoader.close();
_urlLoader = null;
_fileStream = null;
_filename = null;
}

/* ************************************************************
* Setters
* ************************************************************ */
public function set assetURL(value:String):void
{
if (_assetURL == value)
{
return;
}
_assetURL = value;

findImage();
}


public function set localFolder(value:String):void
{
if (_localFolder == value)
{
return;
}

_localFolder = value;

findImage();
}

public function set assetURL160(value:String):void
{
if (_assetURL160 == value)
{
return;
}

_assetURL160 = value;

findImage();
}


public function set assetURL240(value:String):void
{
if (_assetURL240 == value)
{
return;
}

_assetURL240 = value;

findImage();
}


public function set assetURL320(value:String):void
{
if (_assetURL320 == value)
{
return;
}

_assetURL320 = value;

findImage();
}

/* ************************************************************
* Getters
* ************************************************************ */
public function get assetURL():String
{
return _assetURL;
}

public function get localFolder():String
{
return _localFolder;
}

public function get assetURL160():String
{
return _assetURL160;
}

public function get assetURL240():String
{
return _assetURL240;
}

public function get assetURL320():String
{
return _assetURL320;
}
}
}

0 comments on commit 31686a6

Please sign in to comment.