| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
A non-instantiable class that can be mixed with the grid-column
class to
create grid columns whose cells act like static-text
controls with button
controls. Each
cell in the column will implement the pseudo-controls if the row of
that cell is an instance of a grid-row
subclass that mixes in the
widget-row-mixin
class.
To ensure that this mixin class' methods take precedence over other
methods that specialize on grid-column
, this mixin class generally should
appear first in a defclass
expression's list of superclasses, as in:
(defclass my-static-text-and-button-column (static-text-and-button-column-mixin my-subclass-of-grid-column) ...)
When the user clicks on the small button displayed in the cell, the
cell-click method
provided by this mixin calls the button-function of the grid-column
(if
non-nil
) to perform some arbitrary action.
Alternately the user can emulate clicking the button by pressing
either the spacebar or the enter key, or by double-clicking anywhere
in the cell.
The button-function property of the column should be used to determine what happens when the user presses the button.
The button-fills-cell property determines whether the button fills the cell or is small and in one corner of the cell.
The draw-cell method supplied by this mixin calls the column's data-read-converter to convert the data object represented by each cell into a string to display in the cell.
See the section Built-In Grid Cell Widgets on the page for the
grid-widget
class for an
overview of the grid column mixins.
A quicker but less object-oriented alternative to using the widget-column-mixin
classes is to
write cell-widget methods.
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 |