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POGWT AbstractCell - render an image with a URL and include an error handler?
 

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  1. POGWT AbstractCell - render an image with a URL and include an error handler?
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    <p>GWT's AbstractCell allows you to create custom cells, including the ability to render an image in the cell. Is there a way to render an image by setting it's URL property <strong>and</strong> have an error handler associated with it (to take action in the event the image resource is not available or has a problem loading)? In testing the image properties render properly but it doesn't appear that the error handler is included.</p> <p>Here is the example code I'm attempting to use:</p> <pre><code>new AbstractCell&lt;String&gt;() { @Override public void render (Context context, String value, final SafeHtmlBuilder sb) { final Image testImage = new Image(); testImage.addErrorHandler(new ErrorHandler() { @Override public void onError(ErrorEvent event) { // image SRC failed to load so pick a different image and set the tool tip testImage.setResource(images.errorLoading()); // from an image bundle testImage.setTitle("Image Load Failed"); } }); // the value passed in is the image src testImage.setUrl(value); sb.append(SafeHtmlUtils.fromTrustedString(testImage.toString())); } </code></pre> <p>I think the problem resides in the <code>testImage.toString()</code>. To implement the AbstractCell you must append to the SafeHtmlBuilder. When using the <code>toString()</code> method on the image, the image URL is set correctly and other attributes are set correctly, but the Error Handler is not included in the <code>toString()</code> method (as best I can tell). Is there another way to go about this? </p>
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