| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: hotspot
Returns the type of highlighting that the built-in highlight-hotspot method will use to highlight
hotspot when the mouse cursor is over its hotspot-region. hotspot
should be a hotspot
instance, as created with make-instance. The highlight style may be
specified by passing the :highlight-style
initarg
to make-instance, or by
calling (setf
highlight-style) any time later.
The default value is :invert
, which inverts the
screen colors in the hotspot-region. An alternate style is
:outline
, which inverts only the edge of the
region. By "inverts" we mean that the hotspot-region is filled or drawn while the
paint-operation of the
hotspot's parent window is set to po-xor
. This allows the highlighting to be
erased without knowledge of the "real" object that is drawn in the
window where the hotspot lies. Though the highlighting is drawn with
the foreground-color of the
window set to the color of
the hotspot, this will be the resulting color only where the window
background is white, due to the way that po-xor
works.
The other valid value is nil
, in which case
the default highlight-hotspot
method does nothing at all. The hotspot is still sensitive to the
mouse, but does not add any visual indication of this as the mouse
moves over it.
If neither of the built-in highlighting styles is adequate, an application could instead supply its own highlight-hotspot method that ignores the hotspot's highlight-style property and draws some other sort of highlighting.
Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.1 page.
Created 2010.1.21.
| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |