Topic       : The GFA-Basic Compendium
Author      : GFA Systemtechnik GmbH
Version     : GFABasic.HYP v2.98 (12/31/2023)
Subject     : Documentation/Programming
Nodes       : 899
Index Size  : 28056
HCP-Version : 3
Compiled on : Atari
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@hostname   : CAB     
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View Ref-FileGRAF_SLIDEBOX(tree,parent_obj,slider_obj,flag)

tree, parent_obj, slider_obj, flag: iexp

This function also really should be in the Object Library. It moves one
rectangle object within another in a similar way to GFAF_DRAGBOX(). However,
the object can only be moved horizontally or vertically and, in addition, it
must be a 'child' of the limiting rectangle (object). The function call should
only take place when a mouse button is pressed, since the function terminates
when the button is released. The most common application is the movement of
slider bars in windows.

Returns the position of the sliding rectangle relative to the limiting
rectangle:

    Horizontally: 0=far left  1000=far right
    Vertically  : 0=top       1000=bottom

    tree       - Address of the object tree.
    parent_obj - Object number of the limiting rectangle.
    slider_obj - Object number of the sliding rectangle.
    flag       - Direction:
                 0: Horizontal
                 1: Vertical

graf_slidebox()+