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8.12 Graphics library
This library takes on the management of rectangles; so one can
draw a rectangle that moves automatically with the mouse pointer, say.
In all, the following functions are available:
Note: Of these, graf_handle has earned special importance
because with its aid the ID of the physical screen workstation
can be obtained.
See also: Style guidelines
8.12.1 graf_dragbox
Name: 
»Graphics drag box«  Move a rectangular outline frame with the
mouse. 
Opcode: 
71 
Syntax: 
int16_t graf_dragbox ( int16_t gr_dwidth, int16_t gr_dheight,
int16_t gr_dstartx, int16_t gr_dstarty, int16_t gr_dboundx, int16_t
gr_dboundy, int16_t gr_dboundw, int16_t gr_dboundh, int16_t
*gr_dfinishx, int16_t *gr_dfinishy ); 
Description: 
The call graf_dragbox allows the movement a small, rectangular
outline frame within a larger bounding rectangle. Its most frequent
use is to give the user a visual clue when an object is being dragged
on the screen. The following apply:
Parameter 
Meaning 


gr_dwidth 
Initial width, 
gr_dheight 
Height, 
gr_dstartx 
Xcoordinate, and 
gr_dstarty 
Ycoordinate of the frame to be moved 
gr_dboundx 
Xcoordinate, 
gr_dboundy 
Ycoordinate, 
gr_dboundw 
Width, and 
gr_dboundh 
Height of the bounding rectangle 
gr_dfinishx 
Xcoordinate, and 
gr_dfinishy 
Ycoordinate of the frame destination when the mouse button is
released


Return value: 
An error has arisen only if the value 0 is returned. 
Availability: 
All AES versions. 
Group: 
Graphics library 
See also: 
Binding

8.12.1.1 Bindings for graf_dragbox
C: 
int16_t graf_dragbox ( int16_t gr_dwidth, int16_t gr_dheight,
int16_t gr_dstartx, int16_t gr_dstarty, int16_t gr_dboundx, int16_t
gr_dboundy, int16_t gr_dboundw, int16_t gr_dboundh, int16_t
*gr_dfinishx, int16_t *gr_dfinishy ); 
Binding: 
int16_t graf_dragbox (int16_t gr_dwidth, int16_t gr_dheight,
int16_t gr_dstartx, int16_t gr_dstarty,
int16_t gr_dboundx, int16_t gr_dboundy,
int16_t gr_dboundw, int16_t gr_dboundh,
int16_t *gr_dfinishx, int16_t *gr_dfinishy)
{
int_in[0] = gr_dwidth;
int_in[1] = gr_dheight;
int_in[2] = gr_dstartx;
int_in[3] = gr_dstarty;
int_in[4] = gr_dboundx;
int_in[5] = gr_dboundy;
int_in[6] = gr_dboundw;
int_in[7] = gr_dboundh;
crys_if (71);
*gr_dfinishx = int_out[1];
*gr_dfinishy = int_out[2];
return ( int_out[0] );
}

GEMArrays: 

8.12.2 graf_growbox
Name: 
»Graphics grow box«  Draw an animated, growing rectangle. 
Opcode: 
73 
Syntax: 
int16_t graf_growbox ( int16_t gr_gstx, int16_t gr_gsty,
int16_t gr_gstwidth, int16_t gr_gstheight, int16_t gr_gfinx, int16_t
gr_gfiny, int16_t gr_gfinwidth, int16_t gr_gfinheight ); 
Description: 
The call graf_growbox draws an animated rectangular outline box
growing from one set of coordinates to another (complement to
graf_shrinkbox). The following apply:
Parameter 
Meaning 
gr_gstx 
Xcoordinate, 
gr_gsty 
Ycoordinate, 
gr_gstwidth 
Width, and 
gr_gstheight 
Height of the outline box at start 
gr_gfinx 
Xcoordinate, 
gr_gfiny 
Ycoordinate, 
gr_gfinwidth 
Width, and 
gr_gfinheight 
Height of the outline box at end 
Note: As of PCGEM Version 2.0, this call is ignored.
The reason given for this is the legal dispute between Apple
and Digital Research. 
Return value: 
EAn error has arisen only if the value 0 is returned. 
Availability: 
All AES versions. 
Group: 
Graphics library 
See also: 
Binding form_dial graf_shrinkbox

8.12.2.1 Bindings for graf_growbox
C: 
int16_t graf_growbox ( int16_t gr_gstx, int16_t gr_gsty,
int16_t gr_gstwidth, int16_t gr_gstheight, int16_t gr_gfinx, int16_t
gr_gfiny, int16_t gr_gfinwidth, int16_t gr_gfinheight ); 
Binding: 
int16_t graf_growbox (int16_t gr_gstx, int16_t gr_gsty,
int16_t gr_gstwidth,
int16_t gr_gstheight, int16_t gr_gfinx,
int16_t gr_gfiny, int16_t gr_gfinwidth,
int16_t gr_gfinheight)
{
int_in[0] = gr_gstx;
int_in[1] = gr_gsty;
int_in[2] = gr_gstwidth;
int_in[3] = gr_gstheight;
int_in[4] = gr_gfinx;
int_in[5] = gr_gfiny;
int_in[6] = gr_gfinwidth;
int_in[7] = gr_gfinheight;
return ( crys_if(73) );
}

GEMArrays: 

8.12.3 graf_handle
Name: 
»Graphics handle«  Obtain the VDI handle of the AES
workstation. 
Opcode: 
77 
Syntax: 
int16_t graf_handle ( int16_t *gr_hwchar, int16_t *gr_hhchar,
int16_t *gr_hwbox, int16_t *gr_hhbox ); 
Description: 
The call graf_handle obtains the ID of the physical screen
workstation on which the AES outputs, as well as some further
information which will be filled in the following parameters when the
function exits:
Parameter 
Meaning 


gr_hwchar 
Width, and 
gr_hhchar 
Height of a character from the system font, in points 
gr_hwbox 
Width, and 
gr_hhbox 
Height of a cell into which any character from the system font
will fit completely

Note: The information from the parameters gr_hwbox
or gr_hhbox is used be the AES for the width of the
individual window components. 
Return value: 
The function returns the ID (handle) of the opened AES
workstation. 
Availability: 
All AES versions. 
Group: 
Graphics library 
See also: 
Binding v_opnvwk graf_xhandle

8.12.3.1 Bindings for graf_handle
C: 
int16_t graf_handle ( int16_t *gr_hwchar, int16_t *gr_hhchar,
int16_t *gr_hwbox, int16_t *gr_hhbox ); 
Binding: 
int16_t graf_handle (int16_t *gr_hwchar, int16_t *gr_hhchar,
int16_t *gr_hwbox, int16_t *gr_hhbox)
{
crys_if (77);
*gr_hwchar = int_out[1];
*gr_hhchar = int_out[2];
*gr_hwbox = int_out[3];
*gr_hhbox = int_out[4];
return ( int_out[0] );
}

GEMArrays: 

8.12.4 graf_mbox/graf_movebox
Name: 
»Graphics move box«  Move a rectangle with the mouse. 
Opcode: 
72 
Syntax: 
int16_t graf_movebox ( int16_t gr_mwidth, int16_t gr_mheight,
int16_t gr_msourcex, int16_t gr_msourcey, int16_t gr_mdestx, int16_t
gr_mdesty );
or
int16_t graf_mbox( ... ) 
Description: 
The call graf_movebox draws a rectangle of constant size that
moves with the mouse pointer, and is used to give the user a visual
'clue' to an action undertaken by an application. The following apply:
Parameter 
Meaning 
gr_mwidth 
Width, and 
gr_mheight 
Height of the rectangle 
gr_msourcex 
Xcoordinate, and 
gr_msourcey 
Ycoordinate of top left corner at start 
gr_mdestx 
Xcoordinate, and 
gr_mdesty 
Ycoordinate of top left corner at end 
Note: The function can be used, for instance, when the
movement of an icon is not permitted (e.g. dragging the printer icon
onto the wastebasket icon) and so it is to be placed back at its
original position.
In older GEM documentation this function is also called
'graf_mbox'! 
Return value: 
An error has arisen only if the value 0 is returned. 
Availability: 
All AES versions. 
Group: 
Graphics library 
See also: 
Binding

8.12.4.1 Bindings for graf_mbox
C: 
int16_t graf_mbox ( int16_t gr_mwidth, int16_t gr_mheight,
int16_t gr_msourcex, int16_t gr_msourcey, int16_t gr_mdestx, int16_t
gr_mdesty );
oder
int16_t graf_movebox ( ... ) 
Binding: 
int16_t graf_mbox (int16_t gr_mwidth, int16_t gr_mheight,
int16_t gr_msourcex, int16_t gr_msourcey,
int16_t gr_mdestx, int16_t gr_mdesty)
{
int_in[0] = gr_mwidth;
int_in[1] = gr_mheight;
int_in[2] = gr_msourcex;
int_in[3] = gr_msourcey;
int_in[4] = gr_mdestx;
int_in[5] = gr_medsty;
return ( crys_if(72) );
}

GEMArrays: 

8.12.5 graf_mkstate
Name: 
»Graphics mouse and keyboard status«  Obtain the state of the
mouse and keyboard. 
Opcode: 
79 
Syntax: 
int16_t graf_mkstate ( int16_t *gr_mkmx, int16_t *gr_mkmy,
int16_t *gr_mkmstate, int16_t *gr_mkkstate ); 
Description: 
The call graf_mkstate obtains the current mouse position as
well as the state of the mouse buttons and the socalled 'special'
keys ([Shift], [Control], [Alternate]). The following apply:
Parameter 
Meaning 


gr_mkmx 
Xposition, and 
gr_mkmy 
Yposition of the mouse pointer 
gr_mkmstate 
State of mouse buttons (Bit 0 = left button, etc.) 
gr_mkkstate 
'Special' keys of keyboard as bitvector:
0x0001 
= 
Right [Shift] key 
0x0002 
= 
Left [Shift] key 
0x0004 
= 
[Control] key 
0x0008 
= 
[Alternate] key 

Note: A bit is set when the corresponding mouse button or
key is pressed down. 
Return value: 
This is always a 1. 
Availability: 
All AES versions. 
Group: 
Graphics library 
See also: 
Binding evnt_button

8.12.5.1 Bindings for graf_mkstate
C: 
int16_t graf_mkstate ( int16_t *gr_mkmx, int16_t *gr_mkmy,
int16_t *gr_mkmstate, int16_t *gr_mkkstate ); 
Binding: 
int16_t graf_mkstate (int16_t *gr_mkmx, int16_t *gr_mkmy,
int16_t *gr_mkmstate, int16_t *gr_mkkstate)
{
crys_if (79);
*gr_mkmx = int_out[1];
*gr_mkmy = int_out[2];
*gr_mkmstate = int_out[3];
*gr_mkkstate = int_out[4];
return ( int_out[0] );
}

GEMArrays: 

8.12.6 graf_mouse
Name: 
»Graphics mouse«  Change the appearance of the mouse pointer. 
Opcode: 
78 
Syntax: 
int16_t graf_mouse ( int16_t gr_monumber, MFORM *gr_mofaddr ); 
Description: 
The call graf_mouse permits changing the appearance of the
mouse pointer. The following apply for the parameter
gr_monumber:

gr_monumber 
Meaning 
ARROW 
0 
Arrow 
TEXT_CRSR 
1 
Text cursor 
HOURGLASS 
2 
Hourglass, bee 
BUSY_BEE 
2 
See HOURGLASS 
BUSYBEE 
2 
See HOURGLASS 
POINT_HAND 
3 
Pointing hand 
FLAT_HAND 
4 
Flat hand 
THIN_CROSS 
5 
Thin crosshairs 
THICK_CROSS 
6 
Thick crosshairs 
OUTLN_CROSS 
7 
Outlined crosshairs 

8 
Sizer (N.AES) 
X_LFTRT 
8 
Leftright arrow (Geneva) 

9 
Horizontal arrows (N.AES) 
X_UPDOWN 
9 
Updown arrow (Geneva) 

10 
Vertical arrows (N.AES) 
USER_DEF 
255 
Userdefined mouse form 
M_OFF 
256 
Switch off mouse pointer 
M_ON 
257 
Switch on mouse pointer 
M_SAVE 
258 
Save current mouse form 
M_LAST 
259 
Restore most recently saved form 
M_PREVIOUS 
259 
See M_LAST 
M_RESTORE 
260 
Restore last shape 
XACRS_BUBBLE_DISC 
270 
The Data Uncertain logo (XaAES) 
XACRS_RESIZER 
271 
The 'resize window' cursors (XaAES) 
XACRS_NE_SIZER 
272 
(XaAES) 
XACRS_MOVER 
273 
The 'move window' cursor (XaAES) 
XACRS_VERTSIZER 
274 
The 'resize vertically' cursor (XaAES) 
XACRS_HORSIZER 
275 
The 'resize horizontally' cursor (XaAES) 
XACRS_POINTSLIDE 
276 
The 'twoarrows pointing inwards' 


cursor to pinpoint slider position(XaAES) 
X_MRESET 
1000 
(Geneva) 
X_MGET 
1001 
(Geneva) 
X_SET_SHAPE 
1100 
(Geneva) 
If gr_monumber = USER_DEF, then gr_mofaddr is a
pointer to the MFORM structure that sets the appearance of the mouse
pointer.
Note: One should ensure that outside of the working area
of one's own window, the mouse pointer takes the form of an arrow or
hourglass.
In the event that the application must change the mouse form, set
the highest bit (bit 15) of gr_monumber to 1 and OR it with
the desired mouse form index. After finishing the work, call
graf_mouse with the value 0 to set the mouse back to an arrow.
M_FORCE 0x8000
Whether modes 258260 are available, or whether the mouse form is
managed locally for each application can be inquired with appl_getinfo
(opcode 8).
 X_MRESET (1000)

graf_mouse( X_MRESET, 0L );
Resets the mouse so that it is 'on' just once, and also updates
graf_mouse's idea of the hide count.
 X_MGET (1001)

hidecount = graf_mouse( X_MGET, MFORM *mouse );
In this mode, if mouse is nonzero, then the MFORM it
points to is filledin with the shape of the last mouse set with
graf_mouse. 'hidecount' gets the number of times the mouse was hidden
using graf_mouse(M_OFF...). If this number is greater than zero, the
mouse is hidden that number of times. If it is zero, the mouse is
shown once. If it is less than zero, the mouse is 'shown' more than
once.
 X_SET_SHAPE (1100)

graf_mouse( X_SET_SHAPE+index, ANI_MOUSE *mouse_form );
Change the shape of the mouse form whose number is index.
The ANI_MOUSE structure contains up to 32 mouse shapes to be animated
in a continuous loop while that particular mouse shape is being
displayed.
If the frames portion of the ANI_MOUSE structure is one,
then no animation is performed. Otherwise, it should be the number of
frames contained in the mouse animation sequence. The delay
value is the number of 50 Hz timer ticks to pause between each frame
in the animation. The form portion of the structure only needs
to be initialized for the number of frames, so if there are only two
frames, this means that only form[0] and form[1] are used. If a NULL
pointer is passed instead of a pointer to an ANI_MOUSE structure, then
the mouse shape is restored to its default.
It does not matter if the application which sets a new shape
terminates without resetting the mouse shape, as this call allocates
memory internally to hold the new shape data.

Return value: 
An error has arisen only if the value 0 is returned. 
Availability: 
All AES versions. 
Group: 
Graphics library 
See also: 
Binding Mouse clicks and shapes

8.12.6.1 Bindings for graf_mouse
8.12.7 graf_multirubber
Name: 
»Graphics rubberbox«  Draw two 'rubber band' outline
rectangles on the screen. 
Opcode: 
69 
Syntax: 
int16_t graf_multirubber(int16_t x, int16_t y, int16_t minw,
int16_t minh, GRECT *rec, int16_t *outw, int16_t *outh) 
Description: 
The call graf_multirubber displays a pair of 'rubber bands' in
the form of rectangles on the screen, whose top left corner remains
fixed and bottom right corner can be moved while the left mouse button
is held down. Similar to graf_rubberbox, but with two rectangles. The
following apply:
Parameter 
Meaning 


x 
Xcoordinate, and 
y 
Ycoordinate of initial corner 
minw 
Minimum width of rubber band box 
minh 
Minimum height of rubber band box 
rec 

outw 
Width of rubber band box when releasing the mouse button 
outh 
Height of rubber band box when releasing the mouse button

Note: For the reasons mentioned above, the function should
only be called with an already pressed mouse button, since it returns
when the button is released. It's interesting that the minimum width
and height parameters may also take negative values; the
rubber band may then be stretched from bottom right to top left. 
Return value: 
An error has arisen only if the value 0 is returned. 
Availability: 
The function is only available under N.AES. 
Group: 
Graphics library 
See also: 
Binding

8.12.7.1 Bindings for graf_multirubber
C: 
int16_t graf_multirubber(int16_t x, int16_t y, int16_t minw,
int16_t minh, GRECT *rec, int16_t *outw, int16_t *outh) 
Binding: 
int16_t graf_multirubber (int16_t x, int16_t y, int16_t minw,
int16_t minh, GRECT *rec,
int16_t *outw, int16_t *outh)
{
int_in[0] = x;
int_in[1] = y;
int_in[2] = minw;
int_in[3] = minh;
addr_in[0] = rec;
crys_if (69);
*outw = int_out[1];
*outh = int_out[2];
return ( int_out[0] );
}

GEMArrays: 

8.12.8 graf_rubberbox/graf_rubbox
Name: 
»Graphics rubberbox«  Draw 'rubber band' outline rectangle on
the screen. 
Opcode: 
70 
Syntax: 
int16_t graf_rubberbox ( int16_t gr_rx, int16_t gr_ry, int16_t
gr_minwidth, int16_t gr_minheight, int16_t *gr_rlastwidth, int16_t
*gr_rlastheight );
or
int16_t graf_rubbox ( ... ); 
Description: 
The call graf_rubberbox displays a 'rubber band' in the form of
a rectangle on the screen, whose top left corner remains fixed and its
bottom right corner can be moved while the left mouse button is held
down. The following apply:
Parameter 
Meaning 


gr_rx 
Xcoordinate, and 
gr_ry 
Ycoordinate of initial corner 
gr_minwidth 
Minimum width of rubber band box 
gr_minheight 
Minimum height of rubber band box 
gr_rlastwidth 
Width, and 
gr_rlastheight 
Height of rubber band box when releasing the mouse button

Note: For the reasons mentioned above, the function should
only be called with an already pressed mouse button, since it returns
when the button is released. It's interesting that the minimum width
and height parameters may also take negative values; the
rubber band may then be stretched from bottom right to top left.
In older GEM documentation this function is also called
'graf_rubbox'! 
Return value: 
An error has arisen only if the value 0 is returned. 
Availability: 
All AES versions. 
Group: 
Graphics library 
See also: 
Binding

8.12.8.1 Bindings for graf_rubberbox
C: 
int16_t graf_rubberbox ( int16_t gr_rx, int16_t gr_ry, int16_t
gr_minwidth, int16_t gr_minheight, int16_t *gr_rlastwidth, int16_t
*gr_rlastheight );
or
int16_t graf_rubbox ( ... ) 
Binding: 
int16_t graf_rubbox (int16_t gr_rx, int16_t gr_ry,
int16_t gr_minwidth, int16_t gr_minheight,
int16_t *gr_rlastwidth,
int16_t *gr_rlastheight)
{
int_in[0] = gr_rx;
int_in[1] = gr_ry;
int_in[2] = gr_minwidth;
int_in[3] = gr_minheight;
crys_if (70);
*gr_rlastwidth = int_out[1];
*gr_lastheight = int_out[2];
return ( int_out[0] );
}

GEMArrays: 

8.12.9 graf_shrinkbox
Name: 
»Graphics shrink box«  Draw an animated shrinking rectangle on
the screen. 
Opcode: 
74 
Syntax: 
int16_t graf_shrinkbox ( int16_t gr_sfinx, int16_t gr_sfiny,
int16_t gr_sfinwidth, int16_t gr_sfinheight, int16_t gr_sstx, int16_t
gr_ssty, int16_t gr_sstwidth, int16_t gr_sstheight ); 
Description: 
The call graf_shrinkbox draws an animated rectangular outline
box shinking from one set of coordinates to another (complement to
graf_growbox). The following apply:
Parameter 
Meaning 
gr_sfinx 
Xcoordinate, 
gr_sfiny 
Ycoordinate, 
gr_sfinwidth 
Width, and 
gr_sfinheight 
Height of outline box at end 
gr_sstx 
Xcoordinate, 
gr_ssty 
Ycoordinate, 
gr_sstwidth 
Width, and 
gr_sstheight 
Height of outline box at start 
Note: As of PCGEM Version 2.0, this call is ignored.
The reason given for this is the legal dispute between Apple
and Digital Research. 
Return value: 
An error has arisen only if the value 0 is returned. 
Availability: 
All AES versions. 
Group: 
Graphics library 
See also: 
Binding form_dial graf_growbox

8.12.9.1 Bindings for graf_shrinkbox
C: 
int16_t graf_shrinkbox ( int16_t gr_sfinx, int16_t gr_sfiny,
int16_t gr_sfinwidth, int16_t gr_sfinheight, int16_t gr_sstx, int16_t
gr_ssty, int16_t gr_sstwidth, int16_t gr_sstheight ); 
Binding: 
int16_t graf_shrinkbox (int16_t gr_sfinx, int16_t gr_sfiny,
int16_t gr_sfinwidth, int16_t gr_sfinheight,
int16_t gr_sstx, int16_t gr_ssty,
int16_t gr_sstwidth, int16_t gr_sstheight)
{
int_in[0] = gr_sfinx;
int_in[1] = gr_sfiny;
int_in[2] = gr_sfinwidth;
int_in[3] = gr_sfinheight;
int_in[4] = gr_sstx;
int_in[5] = gr_ssty;
int_in[6] = gr_sstwidth;
int_in[7] = gr_sstheight;
return ( crys_if(74) );
}

GEMArrays: 

8.12.10 graf_slidebox
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

8.12.10.1 graf_slidebox from Geneva
The meaning of the gr_slvh parameter has changed slightly,
to provide for realtime updating of sliders:
LSB 
0 
for horizontal slider, 1 for vertical 
MSB 
0 
for oldstyle, dotted outline drag box 

1 
to describe the area to be scrolled in realtime 

2 
to initialize realtime scrolling 

3 
to process the scroll bar in real time 
To use realtime scroll bars, a program does the following:
Call graf_slidebox with gr_slvh mode 0x1XX (where "XX" is 00
for a horizontal slider, and 01 for vertical). In this mode, the
gr_slparent parameter describes the size of the entire area to
be scrolled, and gr_slobject describes the size of the area
which is visible at one time. Both of these values can be in any units
the programmer chooses.
Call graf_slidebox with gr_slvh mode 0x2XX. In this mode,
gr_slparent and gr_slobject have the same meaning they
normally do. The return value will either be 1, if the user has
released the slider, or it will be a number >= 0 which represents the
new position of the slider. This number is based on the numbers passed
in Step 1. The call does not return until the slider has either moved
enough to change the position within the list, or the mouse button has
been released.
If the result of the last graf_slidebox call was 1, then continue
on with the rest of the program. Otherwise, perform whatever action is
necessary to redraw the list of items, starting at the returned index.
The slider position is updated automatically by Geneva; the program
must not alter it.
Call graf_slidebox with gr_slvh mode 0x3XX. In this mode,
gr_slparent and gr_slobject have the same meaning they
normally do. Go to Step 3.
Example: Process a list of 100 items, 10 of which are visible at
once
if( graf_slidebox( 0L, 100, 10, 0x101 ) >= 0 )
{
i = graf_slidebox( object_tree, parent_obj, slider_obj, 0x201 );
while( i>=0 )
{
redraw_list_starting_at(i);
i = graf_slidebox( object_tree, parent_obj, slider_obj, 0x301 );
}
}
8.12.10.2 Bindings for graf_slidebox
8.12.11 graf_watchbox
Name: 
»Graphics watch box«  Select an object and supervise mouse
movements referring to this object. 
Opcode: 
75 
Syntax: 
int16_t graf_watchbox ( OBJECT *gr_wptree, int16_t gr_wobject,
int16_t gr_winstate, int16_t gr_woutstate ); 
Description: 
The call graf_watchbox sets the status of an object, depending
on the position of the mouse pointer (whether it is within or outside
the bounds of the object) while the left mouse button is held down.
The following apply:
Parameter 
Meaning 


gr_wptree 
Address of root object of object tree 
gr_wpobject 
Index of the object to watch 
gr_winstate 
Object status when the mouse pointer is within the boundary:

gr_woutstate 
Object status when the mouse pointer is outside the boundary:

Note: The function returns when the mouse button is
released, so it should only be made while the button is depressed. 
Return value: 
The function returns the position of the mouse pointer at the
release of the button (0 = outside the object boundary, 1 = inside the
boundary). 
Availability: 
All AES versions. 
Group: 
Graphics library 
See also: 
Binding graf_wwatchbox OBJECT

8.12.11.1 Bindings for graf_watchbox
8.12.12 graf_wwatchbox
Name: 
»Graphics window watch box«  Select an object in a window and
supervise mouse movements referring to this object. 
Opcode: 
62 
Syntax: 
int16_t graf_wwatchbox ( OBJECT *gr_wptree, int16_t gr_wobject,
int16_t gr_winstate, int16_t gr_woutstate, int16_t whandle ); 
Description: 
The call graf_wwatchbox sets the object status of an object in
a window, depending on the position of the mouse pointer (whether it
is within or outside the bounds of the object) while the left mouse
button is held down. The following apply:
Parameter 
Meaning 


gr_wptree 
Address of root object of object tree 
gr_wpobject 
Index of the object to watch 
gr_winstate 
Object status when the mouse pointer is within the boundary:

gr_woutstate 
Object status when the mouse pointer is outside the boundary: 
whandle 
Window identifier

Note: The function returns when the mouse button is
released, so it should only be made while the button is depressed. It
basically corresponds to graf_watchbox with the difference that here
the rectanglelist of the window is taken into account. 
Return value: 
The function returns the position of the mouse pointer at the
release of the button (0 = outside the object boundary, 1 = inside the
boundary). 
Availability: 
The function is available in MagiC as of Version 5.10. 
Group: 
Graphics library 
See also: 
Binding graf_watchbox OBJECT

8.12.12.1 Bindings for graf_wwatchbox
C: 
int16_t graf_wwatchbox ( OBJECT *gr_wptree, int16_t gr_wobject,
int16_t gr_winstate, int16_t gr_woutstate, int16_t whandle ); 
Binding: 
int16_t graf_wwatchbox (OBJECT *gr_wptree, int16_t gr_wobject,
int16_t gr_winstate, int16_t gr_woutstate,
int16_t whandle)
{
int_in[0] = gr_wobject;
int_in[1] = gr_winstate;
int_in[2] = gr_woutstate;
int_in[3] = whandle;
addr_in[0] = gr_wptree;
return ( crys_if(62) );
}

GEMArrays: 

8.12.13 graf_xhandle
Name: 
»Graphics handle«  Obtain ID of the VDI workstation. 
Opcode: 
77 
Syntax: 
int16_t graf_xhandle ( int16_t *gr_hwchar, int16_t *gr_hhchar,
int16_t *gr_hwbox, int16_t *gr_hhbox, int16_t *device ); 
Description: 
The call graf_xhandle obtains the ID of the screen workstation
to which the AES outputs. The following apply:
Parameter 
Meaning 


gr_hwchar 
Width, and 
gr_hhchar 
Height of a character from the system font, in points 
gr_hwbox 
Width, and 
gr_hhbox 
Height of a cell into which any character from the system font
fits completely 
device 
Workstation handle of the AES (vdi_device)

Note: The information from the parameters gr_hwbox
or gr_hhbox is used be the AES for the width of the
individual window components. 
Return value: 
The function returns the ID (handle) of the opened VDI
workstation. 
Availability: 
Since KAOS 1.4 
Group: 
Graphics library 
See also: 
Binding v_opnvwk graf_handle

8.12.13.1 Bindings for graf_xhandle
C: 
int16_t graf_xhandle ( int16_t *gr_hwchar, int16_t *gr_hhchar,
int16_t *gr_hwbox, int16_t *gr_hhbox, int16_t *device ); 
Binding: 
int16_t graf_xhandle (int16_t *gr_hwchar, int16_t *gr_hhchar,
int16_t *gr_hwbox, int16_t *gr_hhbox,
int16_t *device )
{
crys_if (77);
*gr_hwchar = int_out[1];
*gr_hhchar = int_out[2];
*gr_hwbox = int_out[3];
*gr_hhbox = int_out[4];
*device = int_out[5];
return ( int_out[0] );
}

GEMArrays: 
