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/* <license>
* This file is part of the dis-Emi-A HaXe Library. Copyright (c) edA-qa mort-ora-y
* For full copyright and license information please refer to doc/license.txt.
* </license>
*/
package ui;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.ProgressEvent;
import flash.display.Loader;
import flash.net.URLRequest;
import ui.anim.lib.CircularProgress;
import DrawBasicTypes;
/**
* A wrapper class to use a given URL as a display object. This simplifies loading
* external objects directly into a target widget -- displaying progress as it loads.
*
* Events:
* Event.COMPLETE when a URL has finished loading
* ? > ErrorEvent if something goes wrong
* IO_ERROR
* SECURITY_ERROR
*/
class URLSprite extends Sprite, implements Widget
{
var loader : Loader;
var loaded : flash.display.DisplayObject;
var tback : Widget; //a temporary background while loading, on start, or on error
var useTBack : Bool;
/**
* @param url [in] the url of the image to display, null if nothing at creation time
* @param tback [in] true (default) to show an image on loading/error, false to display nothing
*/
public function new( url : String, ?tback : Null<Bool> )
{
super();
MixinWidget();
useTBack = (tback == null) ? true : tback;
loadURL( url );
}
/**
* Sets a new URL for the display in this object.
*
* TODO: if this is called before the previous one is finished the events from
* the previous one will still be triggered and likely cause an error.
*/
public function loadURL( url : String )
{
//remove existing children
if( loaded != null )
{
removeChild( loaded );
loaded = null;
}
disableTBack();
if( url != null )
{
loader = new Loader();
loader.contentLoaderInfo.addEventListener( Event.COMPLETE, onComplete );
loader.contentLoaderInfo.addEventListener( flash.events.IOErrorEvent.IO_ERROR, onError );
loader.contentLoaderInfo.addEventListener( flash.events.SecurityErrorEvent.SECURITY_ERROR, onError );
loader.contentLoaderInfo.addEventListener( ProgressEvent.PROGRESS, onProgress );
loader.load( new URLRequest( url ) );
}
if( useTBack )
enableTBack();
//force update now
update();
}
function enableTBack()
{
if( tback == null )
{
//old drawing of loading...
//tback = new ui.DrawBox( drawLoading );
//TODO: wrong positioning during loading!
tback = new CircularProgress( { color: Color.rgb(0,0.8,0) } );
addChild( tback.getNative() );
}
}
function disableTBack()
{
if( tback != null )
{
removeChild( tback.getNative() );
tback = null;
}
}
function onComplete( evt : Event )
{
disableTBack();
//one would suspect using the loader.content directly might be more managable,
//but a stupid security error gets in the way, somehow loader.content is considered
//scripting access and flags the sandbox error, so we live with just making the loader
//itself a child (adding a server proxy or domain files to all other servers would make
//direct use possible, but since this seems to work normally there is no need)
loaded = loader; //.content;
addChild( loaded );
update();
//tell listeners that we're done
dispatchEvent( new Event( Event.COMPLETE ) );
}
function onError( evt : Event )
{
//always show an error display, even if loading graphic not requested...
disableTBack();
tback = ui.DrawBox.identity( drawError );
addChild( tback.getNative() );
update();
//tell listeners something has gone wrong
dispatchEvent( evt.clone() );
}
function onProgress( evt : ProgressEvent )
{
//TODO: identify any actor which implements Progress
if( !Std.is( tback, CircularProgress ) )
return;
var cp = cast( tback, CircularProgress );
cp.actorSetTrait1( cp.trait.General.Level, evt.bytesLoaded * 1.0 / evt.bytesTotal );
}
function _resize( w : Float, h : Float )
{
if( loaded != null )
{
loaded.width = w;
loaded.height = h;
}
if( tback != null )
{
tback.resize( w, h );
//quick repositioning (perhaps only for default background?)
var ctr = getCenter().sub( tback.getCenter() );
tback.move( w * ctr.x, h * ctr.y );
}
}
static function drawLoading( graphics : draw.GraphicsX, w : Float, h : Float )
{
var lw = w / 10;
graphics.use( Pen.solid( lw, Color.rgb(0,0.5,0), 0.5 ) );
var off = 0.1;
var eoff = 1 - 2 * off;
graphics.drawEllipse( w * off, h * off, w * eoff, h * eoff );
}
static function drawError( graphics : draw.GraphicsX, w : Float, h : Float )
{
var lw = w / 10;
graphics.use( Pen.solid( lw, Color.rgb(0.5,0,0), 0.5 ) );
var off = 0.1;
var eoff = 1 - 2 * off;
graphics.moveTo( w * off, h * off );
graphics.lineTo( w * eoff, h * eoff );
graphics.moveTo( w * eoff, h * off );
graphics.lineTo( w * off, h * eoff );
}
include(`MixinWidget.ihx')
}
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