@ GNU AS assembler header file for OptionButton
@ Written by DefMod (Dec  9 2012) on Sun Dec  9 15:50:29 2012
@ Jonathan Coxhead, jonathan@doves.demon.co.uk, 5 Sept 1995

@ OSLib---efficient, type-safe, transparent, extensible,
@ register-safe API coverage of RISC OS
@ 
@ Copyright (c) 1994-2012 Jonathan Coxhead and OSLib maintainers
@ 
@ Licence:
@ 
@    OSLib is free software; you can redistribute it and/or modify
@ it under the terms of the GNU General Public License as published by
@ the Free Software Foundation; either version 1, or (at your option)
@ any later version - and this with the following clarification and
@ special exception:
@ 
@    Linking this library statically or dynamically with other modules
@ is making a combined work based on this library. Thus, the terms
@ and conditions of the GNU General Public License cover the whole
@ combination.
@ 
@    As a special exception, the copyright holders of this library
@ give you permission to link this library with independent modules
@ to produce an executable, regardless of the license terms of these
@ independent modules, and to copy and distribute the resulting
@ executable under terms of your choice, provided that you also meet,
@ for each linked independent module, the terms and conditions of the
@ license of that module. An independent module is a module which is
@ not derived from or based on this library. If you modify this
@ library, you may extend this exception to your version of the library,
@ but you are not obliged to do so. If you do not wish to do so, delete
@ this exception statement from your version.
@ 
@    OSLib is distributed in the hope that it will be useful,
@ but WITHOUT ANY WARRANTY; without even the implied warranty of
@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
@ GNU General Public License for more details.
@ 
@    You should have received a copy of the GNU General Public License
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@ Foundation, Inc, 675 Mass Ave, Cambridge, MA 02139, USA.

#ifndef OptionButton_Hdr
#  define OptionButton_Hdr

#  ifndef Get_Types
#    define Get_Types
#    include "oslib/Types.Hdr"
#  endif

#  ifndef Get_Toolbox
#    define Get_Toolbox
#    include "oslib/Toolbox.Hdr"
#  endif

#  ifndef Get_Gadget
#    define Get_Gadget
#    include "oslib/Gadget.Hdr"
#  endif

@Symbols for constants
#  define Class_OptionButton 0xc0
#  define OptionButton_GenerateStateChanged 0x1
#  define OptionButton_On 0x4
#  define Action_OptionButtonStateChanged 0x82882
#  define OptionButton_StateChangedAdjust 0x1
#  define OptionButton_StateChangedSelect 0x4

@Symbols for structure offsets and sizes
        .struct 0
OptionButton_Gadget_label      : .skip   Toolbox_MsgReference
OptionButton_Gadget_label_limit: .skip   Int
OptionButton_Gadget_action     : .skip   Bits
OptionButton_Gadget            : 

        .struct 0
        Gadget_Object_MEMBERS OptionButton_Object
OptionButton_Object_label      : .skip   Toolbox_MsgReference
OptionButton_Object_label_limit: .skip   Int
OptionButton_Object_action     : .skip   Bits
OptionButton_Object            : 

        .struct 0
OptionButton_ActionStateChanged_on: .skip   Bool
OptionButton_ActionStateChanged: 

        .struct 0
        Toolbox_ActionHeader_MEMBERS OptionButton_ActionStateChangedBlock
OptionButton_ActionStateChangedBlock_on: .skip   Bool
OptionButton_ActionStateChangedBlock: 


@Symbols for SWI's and SWI reason codes
#  define OptionButton_SetLabel 0xc0
   @Entry
   @  R0 = flags (Bits)
   @  R1 = window (Toolbox_O)
   @  R2 = &C0
   @  R3 = option_button (Toolbox_C)
   @  R4 -> label (String)

#  define OptionButton_GetLabel 0xc1
   @Entry
   @  R0 = flags (Bits)
   @  R1 = window (Toolbox_O)
   @  R2 = &C1
   @  R3 = option_button (Toolbox_C)
   @  R4 = buffer (pointer to String)
   @  R5 = size (Int)
   @Exit
   @  R5 = used (Int)

#  define OptionButton_SetAction 0xc2
   @Entry
   @  R0 = flags (Bits)
   @  R1 = window (Toolbox_O)
   @  R2 = &C2
   @  R3 = option_button (Toolbox_C)
   @  R4 = action (Bits)

#  define OptionButton_GetAction 0xc3
   @Entry
   @  R0 = flags (Bits)
   @  R1 = window (Toolbox_O)
   @  R2 = &C3
   @  R3 = option_button (Toolbox_C)
   @Exit
   @  R0 = action (Bits)

#  define OptionButton_SetState 0xc4
   @Entry
   @  R0 = flags (Bits)
   @  R1 = window (Toolbox_O)
   @  R2 = &C4
   @  R3 = option_button (Toolbox_C)
   @  R4 = on (Bool)

#  define OptionButton_GetState 0xc5
   @Entry
   @  R0 = flags (Bits)
   @  R1 = window (Toolbox_O)
   @  R2 = &C5
   @  R3 = option_button (Toolbox_C)
   @Exit
   @  R0 = on (Bool)

#endif
