Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
623 views
in Technique[技术] by (71.8m points)

apache flex - Unable to access embedded images in htmlText

Images can be included in TextArea controls using the htmlText property:

ta.htmlText = '<img src="http://..."/>';

How can I reference embedded images?

An example:

<mx:TextArea xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script>
        <![CDATA[
            [Embed(source='../assets/img.gif')]
            public var img:Class;
        ]]>
    </mx:Script>
    <mx:htmlText>
        <![CDATA[
            <img src="???" />
        ]]>
    </mx:htmlText>
</mx:TextArea>

UPD:

<img src='../assets/img.gif />

works on local machine, but in server environment it throws:

Error #2044: Unhandled IOErrorEvent:. text=Error #2035: URL Not Found.

How can I fix this?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

OK, I've just spent a couple of hours sorting this out, but I've got it working in Flash and Flex.

Displaying images in a TextField

You can load DisplayObjects into TextField <img /> tags including MovieClips, Sprites and embedded images.

  • In Flash or Flex if you want to display an embedded image then you will have to create a wrapper class that extends a DisplayObject class (e.g. Sprite or MovieClip).

  • Make sure your text field is large enough to contain the image. During testing I thought things weren't working when I really had the TextField too small to display the whole image.


Flash Example

Simple example, all code is on the main timeline.

  1. Create a dynamic TextField on the stage. Give it a useful name, I'm calling mine txtImageTest.

  2. Resize txtImageTest to a decent size, e.g. 300x150px.

  3. Create a new MovieClip symbol and give it a class name, e.g. imageClip1.

  4. Draw something in your new clip or place an embedded image inside imageClip1.

  5. Go back to the main timeline, deselect all objects and open the Actionscript editor on the first frame.

  6. Turn on multiline and word-wrapping on the text field:

    imageClip1.wordWrap = true;
    imageClip1.multiline = true;
    imageClip1.htmlText = "<p>You can include an image in your HTML text with the &lt;img&gt; tag.</p><p><img id='testImage' src='imageClip1' align='left' width='30' height='30' hspace='10' vspace='10'/>Here is text that follows the image. I'm extending the text by lengthening this sentence until it's long enough to show wrapping around the bottom of the image.</p>"
    
  7. Save and test your movie.


Flex Example

Since we can't just create a new MovieClip in the library like we did in Flash we need to create a new class that performs the same task (this method also works in Flash if you want want to create a new clip in the library).

Here is my class for a black triangle bullet, called BlackArrow.as:

// Set the correct package for you class here.
package embed
{
    import flash.display.Sprite;
    import mx.core.BitmapAsset;

    public class BlackArrow extends Sprite
    {
        // Embed the image you want to display here.
        [Embed(source='assets/embed/triangleIcon_black.png')]
        [Bindable]
        private var TriangleImage:Class;

        public function BlackArrow()
        {
            super();

            // Instantiate the embedded image and add it to your display list.
            var image:BitmapAsset = new TriangleImage();
            addChild(image);
        }

    }
}

NOTE: Do not extend Bitmap (in Flash) or BitmapAsset (in Flex) as they do not scale or position properly in the TextField. Choose Sprite or something similar.

Here is an example of a class that displays this image in the TextField:

<?xml version="1.0" encoding="utf-8"?>
<mx:VBox xmlns:mx="http://www.adobe.com/2006/mxml"
    width="100%" height="100%">

    <mx:Script>
    <![CDATA[
        import embed.BlackArrow;

        // You must include a variable declaration of the same type as your
        // wrapper class, otherwise the class won't be compiled into
        // the SWF and you will get an IOError.
        private var img2:BlackArrow;
    ]]>
    </mx:Script>

    <mx:Text id="txtResults1" width="100%" height="100%">
        <mx:htmlText>
        <![CDATA[<p>You can include an image in your HTML text with the &lt;img&gt; tag.</p><p><img id='testImage' src='embed.BlackArrow' align='left' hspace='10' vspace='10'/>Here is text that follows the image. I'm extending the text by lengthening this sentence until it's long enough to show wrapping around the bottom of the image.</p>]]>
        </mx:htmlText>
    </mx:Text>

 </mx:VBox>

Note that I am using the fully-qualified class name in the src attribute of the image tag.


Final Notes


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...