| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: widget
This generic function is called internally to show the tooltip of a control. This function is not normally called by an application, but wrapper methods may be added to act when a tooltip is invoked after the mouse pauses over a control. This may be useful, for example, for displaying some other form of help (such as a status-bar message) after the mouse has paused over a control.
Note that this generic function is called even if the show-tooltips configuration option has been turned off. This allows showing some custom form of help for a control without using tooltips, which may be handy if tooltips are considered more annoying than a status-bar message, for example.
See also hide-tooltip and tooltip-delay.
Here is an example method that could be added to cause dialog-item help-strings to be displayed in the status-bars of their parent windows (or other ancestor windows) whenever the mouse cursor pauses over any dialog-item. See help-string.
(defmethod show-tooltip :after ((widget dialog-item)) (let* ((help-string (help-string widget))) (when help-string (window-message (parent widget) "~a" help-string))))
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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 |