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February 2001 Genie Application Style Guide 65
12
Chapter 12 Icons and Images
Images can enhance or support the displayed information so that the user can quickly
review a list of items or see a trend. For example, a weather report can display a date
along with an icon of the predicted weather. Likewise, an up/down arrow can precede a
stock quote.
Shared Feature Set: Image Support
■ Images need to be in wbmp format.
■ Always include descriptive alt text for devices that do not support images.
■ If the phone talks to an UP.Link Server Suite, the server will compile 1-bit bmp
images to wbmp form.
■ The WAP Forum does not currently define an animated image format.
■ Do not define associate functions for areas within an image.
There is no way to associate an area within an image to an action (that is, there is no
image map function).
■ Be careful using images on cards with a timer element, because the timer may
expire before the image is loaded.
Openwave Image Support
■ Images larger than the display size are scrollable vertically, but not horizontally.
Thus, make images no wider than 40 pixels.
■ Use preloaded images.
Openwave offers localsrc images that are preloaded into the devices that support
images. The use of these images shortens network access time and creates a consistent
user experience. A list of the
localsrc images is available in the “Images” section of
the WML reference that ships with the UP.SDK from Openwave, which can also be
accessed at
http://developer.openwave.com. See the “Image” section in the
UP.SDK Developer’s Guide for localsrc images.
■ Images will be aligned according to the attribute of the <p> element.
■ Images can be displayed inline (along with text or a link).