A widget that displays the image at a given URL. The image can be in
 'unclipped' mode (the default) or 'clipped' mode. In clipped mode, a viewport
 is overlaid on top of the image so that a subset of the image will be
 displayed. In unclipped mode, there is no viewport - the entire image will be
 visible. Whether an image is in clipped or unclipped mode depends on how the
 image is constructed, and how it is transformed after construction. Methods
 will operate differently depending on the mode that the image is in. These
 differences are detailed in the documentation for each method.
 
 
 If an image transitions between clipped mode and unclipped mode, any
 Element-specific attributes added by the user (including style
 attributes, style names, and style modifiers), except for event listeners,
 will be lost.
 
 
 CSS Style Rules
 
 - .gwt-ImageThe outer element
 
 Tranformations between clipped and unclipped state will result in a loss of
 any style names that were set/added; the only style names that are preserved
 are those that are mentioned in the static CSS style rules. Due to
 browser-specific HTML constructions needed to achieve the clipping effect,
 certain CSS attributes, such as padding and background, may not work as
 expected when an image is in clipped mode. These limitations can usually be
 easily worked around by encapsulating the image in a container widget that
 can itself be styled.
 
 
 
Example