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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