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306
com/yahoo/astra/fl/controls/mediaPlayerClasses/MediaInfoView.as
Executable file
306
com/yahoo/astra/fl/controls/mediaPlayerClasses/MediaInfoView.as
Executable file
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/*
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Copyright (c) 2009 Yahoo! Inc. All rights reserved.
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The copyrights embodied in the content of this file are licensed under the BSD (revised) open source license
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*/
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package com.yahoo.astra.fl.controls.mediaPlayerClasses
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{
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import com.yahoo.astra.fl.events.MediaEvent;
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import fl.core.UIComponent;
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import fl.managers.IFocusManagerComponent;
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import flash.display.DisplayObjectContainer;
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import flash.display.Sprite;
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import flash.events.*;
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import flash.geom.Point;
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import flash.text.TextField;
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import flash.text.TextFieldAutoSize;
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import flash.text.TextFormat;
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import flash.utils.Timer;
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//--------------------------------------
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// Class Description
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//--------------------------------------
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/**
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* MediaInfoView extends MediaView. Creates a text ticker displaying the artist and title of the media clip.
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*
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* @see com.yahoo.astra.fl.controls.mediaPlayerClasses.MediaView
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* @see com.yahoo.astra.fl.controls.mediaPlayerClasses.IMediaView
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*
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* @langversion 3.0
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* @playerversion Flash 9.0.28.0
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* @author Dwight Bridges
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*/
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public class MediaInfoView extends MediaView implements IFocusManagerComponent
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{
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//--------------------------------------
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// Constructor
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//--------------------------------------
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/**
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* Constructor
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* @param container
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* @param model
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* @param controller
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*
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* Sets the model and controller for the MediaInfoView
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*
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* @langversion 3.0
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* @playerversion Flash 9.0.28.0
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*/
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public function MediaInfoView(container:DisplayObjectContainer = null, model:IMediaClip = null, controller:IMediaController = null)
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{
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super(container, model, controller);
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_background = getDisplayObjectInstance(getStyleValue("background")) as Sprite;
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if(_background != null)
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{
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addChild(_background);
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_background.width = width;
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_background.height = height;
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}
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_textHolder = new Sprite();
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_textHolder.cacheAsBitmap = true;
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addChild(_textHolder);
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_mask = getDisplayObjectInstance(getStyleValue("mask")) as Sprite;
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_mask.cacheAsBitmap = true;
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_mask.width = width;
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_mask.height = height;
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addChild(_mask);
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_textHolder.mask = _mask;
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_timer = new Timer(50);
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_timer.addEventListener(TimerEvent.TIMER, positionUpdateHandler);
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}
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//--------------------------------------------------------------------------
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//
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// Class mixins
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//
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//--------------------------------------------------------------------------
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/**
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* Placeholder for mixin by MediaInfoViewAccImpl.
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*/
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public static var createAccessibilityImplementation:Function;
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//--------------------------------------
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// Properties
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//--------------------------------------
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/**
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* @private (protected)
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*/
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protected var _artist:String;
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/**
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* @private (protected)
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*/
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protected var _title:String;
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/**
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* The string to display in the scrolling text field
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*/
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public var text:String = "";
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/**
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* @private (protected)
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*/
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protected var _data:Array
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/**
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* @private (protected)
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*/
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protected var _timer:Timer;
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/**
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* @private (protected)
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*/
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protected var _textHolder:Sprite;
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/**
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* @private (protected)
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*/
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protected var _mask:Sprite;
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/**
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* @private (protected)
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*/
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protected var _points:Array;
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/**
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* @private
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*
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* default styles for the MediaInfoView
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*/
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private static var defaultStyles:Object =
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{
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background:"InfoView_backgroundSkin",
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mask:"InfoView_mask",
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textFormat:new TextFormat("_sans", 9, 0xeeeeee)
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}
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/**
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* @private (protected)
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*/
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protected var _background:Sprite;
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/**
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* @private (override))
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*/
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override public function set width(value:Number):void
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{
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var tempWidth:Number = width;
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super.width = value;
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_width = value;
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if(_mask != null)
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{
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_mask.width = value;
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_background.width = value;
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if(_data != null && _data.length > 0) _data[0].x = (width/tempWidth) * _data[0].x;
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}
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}
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/**
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* @private (override)
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*/
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override public function set height(value:Number):void
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{
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var tempHeight:Number = height;
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super.height = value;
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_height = value;
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if(_mask != null)
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{
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_mask.height = value;
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_background.height = value;
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_mask.x = _background.x = 0;
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if(_data != null && _data.length > 0) _data[0].y = (height/tempHeight) * _data[0].y;
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}
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}
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//--------------------------------------
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// Public Methods
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//--------------------------------------
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/**
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* getStyleDefinition - returns defaultStyles
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*
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* @langversion 3.0
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* @playerversion Flash 9.0.28.0
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*/
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public static function getStyleDefinition():Object
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{
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return mergeStyles(defaultStyles, UIComponent.getStyleDefinition());
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}
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//--------------------------------------
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// Protected Methods
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//--------------------------------------
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/**
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* @private (protected)
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* attaches event listeners to the _model
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* <p>called after the _model is set</p>
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*
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* @langversion 3.0
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* @playerversion Flash 9.0.28.0
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*/
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override protected function addListeners():void
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{
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_model.addEventListener(MediaEvent.INFO_CHANGE, mediaInfoChangeHandler);
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}
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/**
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* @private
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* mediaInfoChangeHandler
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* <p>fired by the MediaEvent.INFO_CHANGE</p>
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* <p>checks the _artist and _title against the _model's<p>
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* <p>if different, remove any existing text fields, reset properties and start the timer</p>
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*
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* @langversion 3.0
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* @playerversion Flash 9.0.28.0
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*/
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private function mediaInfoChangeHandler(event:MediaEvent):void
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{
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if(_model.artist != _artist || _model.title != _title)
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{
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_artist = _model.artist;
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_title = _model.title;
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if(_data != null)
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{
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var len:int = _data.length;
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for(var i:int = len-1;i > -1; i--)
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{
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_textHolder.removeChild(_data[i]);
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_data.pop();
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}
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}
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_data = [];
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_points = [];
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text = _artist + " - " + _title;
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_data[_data.length] = getTextField(text);
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_timer.stop();
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_timer.start();
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}
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}
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/**
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* @private (protected)
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* adds a text field to the _textHolder
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*
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* @langversion 3.0
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* @playerversion Flash 9.0.28.0
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*/
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protected function getTextField(value:String):TextField
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{
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var tf:TextFormat = new TextFormat();
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tf.color = 0xeeeeee;
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tf.font = "_sans";
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tf.size = 9;
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var textField:TextField = new TextField();
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textField.multiline = false;
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textField.wordWrap = false;
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textField.autoSize = TextFieldAutoSize.LEFT;
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textField.selectable = false;
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textField.text = value;
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textField.setTextFormat(tf);
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var textX:Number = _textHolder.width;
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_textHolder.addChild(textField);
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textField.x = textX;
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return textField;
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}
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/**
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* @private
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*
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* @langversion 3.0
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* @playerversion Flash 9.0.28.0
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*/
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protected function positionUpdateHandler(event:TimerEvent):void
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{
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for(var i:int = 0; i < _data.length; i++)
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{
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_points[i] = globalToLocal(_textHolder.localToGlobal(new Point(_data[i].x + _data[i].textWidth, _data[i].y))).x;
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if(_points[i] < 0)
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{
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_data[i].x = _textHolder.globalToLocal(localToGlobal(new Point(width, 0))).x;
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}
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else
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{
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_data[i].x--;
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}
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}
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}
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/**
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* @inheritDoc
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*/
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override protected function initializeAccessibility():void
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{
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if (MediaInfoView.createAccessibilityImplementation != null)
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MediaInfoView.createAccessibilityImplementation(this);
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}
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}
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}
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