up-down-control

Class

The class of the up-down control. That is a control with two arrow heads pointing in opposite directions used for incrementing a numeric value in either direction by clicking on the arrow heads. A range of valid values can be specified by the range property.

Can be used on its own or paired with a buddy. A possible buddy-widget is the editable-text control. Once paired, the up-down-control will modify the display of its buddy-widget, otherwise it only modifies its own value (which can be programmatically accessed and, if desired, displayed elsewhere).

For example, place an editable-text control on a form and place an up-down control next it. Make the value of the editable-text 1 and the range of the up-down control (0, 100). Ensure that the editable-text is correctly identified as the buddy-widget of the up-down control (as indicated by the buddy-widget property). When you run the form, the value in the editable text widget will increase (up to 100) and decrease (down to 0) as the up-down control is clicked.

See About how to get sample code for creating controls in cgide.htm, which explains how to use the IDE to create such code.

Copyright (c) 1998-2002, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 6.2. This page was not revised from the 6.1 page.
Created 2002.2.26.