Maybe have a look at the
ImageLoadingCell:
http://www.gwtproject.org/javadoc/latest/com/google/gwt/cell/client/ImageLoadingCell.html
On Monday, January 5, 2015 4:13:10 PM UTC+1, marian lux wrote:
>
> Today I am rendering my mgwt CellList with the following Template and
> (rendering) method:
>
> public interface Template extends SafeHtmlTemplates{
> @SafeHtmlTemplates.Template("<div style='{0}' class='{2}'>'{1}'</div>")
> SafeHtml content(SafeStyles dynamicBackgroundImage, String cellContents,
> String cssMyCell);
> }
>
> public void render(SafeHtmlBuilder safeHtmlBuilder, ActivityItem model) {
> ArrayList<String> images = model.getImages();
>
> SafeStylesBuilder safeStylesBuilder = new SafeStylesBuilder();
> safeStylesBuilder.trustedBackgroundImage("url('" + images.get(0) + "')");
>
> String cssMyCell = SingletonClientResources.getInstance().getCssResources
> ().getActivityItemCellCss().activityItemCell();
>
> SafeHtml content = TEMPLATE.content(safeStylesBuilder.toSafeStyles(),
> model.getTitle(), cssMyCell);
> safeHtmlBuilder.append(content);
> }
>
> Sometimes the Image URL #1 (images.get(0)) is not valid/available and
> there should appear a default Image. So Chrome dev console tells me e.g:
> GET http://xyz.jpg 403 (Access Denied)
>
> If this occurs, I want to display an alternative Image e.g. from my
> ClientBundle.
> How can I handle this in an elegant way?
> (I know I could test all URLs by adding an Image Widget and listening for
> ErrorHandler. Also I don't want to check the URLs on Server side because
> the server is not in my influence)
>
> THX
> Marian
>
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