Instance maintains a kivy Image widget on which to display an image
Constructor: Create an ImagePanel in the given widget.
param widget: The widget to display the image in Precondition: a Kivy Widget
param image: image to display. Precondition: an ImageArray object
Changes to the image will only be shown in the ImagePanel when you invoke the display method.
These attributes may be read (e.g. used in an expression), but not altered.
Kivy Widget where image will be displayed.
This attribute is set by the constructor and may not be modified
Reference to ImageArray to display
This attribute is set by the constructor and may not be modified