slider menu item

[Timtam]

a menu item which should represent slider functionality. it should:

• be able to contain several items of any type, as long as they can be converted into a string so that they can be spoken
• those items be selectable with the left and right arrow keys
• wrapping should be optional
• the currently selected item needs to be accessible from within code
• the list of items must be setable from within code
• optionally, a callback can be handed over to the slider whichreceives the direction (forward/backward) and should return a string to be spoken.