Topic       : TOS - The Operating System
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Version     : tos.hyp (December 19, 2008)
Subject     : Programmieren/Atari
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Compiled on : Atari
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View Ref-File8.12.10  graf_slidebox                                             TOS

 Name:         »Graphics slide box« - Obtain slider position etc.

 Opcode:       76

 Syntax:       int16_t graf_slidebox ( OBJECT *gr_slptree, int16_t 
               gr_slparent, int16_t gr_slobject, int16_t gr_slvh );

 Description:  The call graf_slidebox serves to inquire the position 
               of sliders within the bounds of its parent object. The 
               following apply:

                Parameter    Meaning

                gr_slptree   Address of object tree holding parent and 
                             child objects
                gr_slparent  Index of the parent rectangle
                gr_slobject  Index of the child rectangle to be moved 
                             (slider)
                gr_slvh      Direction of movement:
                              0  =  Move horizontally 
                              1  =  Move vertically 


               Note: The function may only be called with an already 
               pressed mouse button, since it returns immediately when 
               the button is released.

               It can be used also with sliders built into dialogs: 
               Make the slider a TOUCHEXIT object and call this func 
               tion when it is clicked on.

               In Geneva the parameter gr_slvh has changed slightly.

 Return value: The function returns the relative position of the 
               slider, between 0 (far left or very top) and 1000 (far 
               right or very bottom).

 Availability: All AES versions.

 Group:        Graphics library

 See Also:     Binding   OBJECT