Subversion Repositories Kolibri OS

align 4

; @brief system function 17 - Get the identifier of the pressed button

; @param eax 17 - number function

; @return  eax = 1 - buffer empty,

;          al = 0 - the button was pressed with left mouse button,

;          al = bit corresponding to used mouse button otherwise

sys_getbutton:

        mov     ebx, [current_slot_idx]    ; TOP OF WINDOW STACK

        mov     [esp + SYSCALL_STACK.eax], dword 1

        movzx   ecx, word [WIN_STACK + ebx * 2]

        mov     edx, [thread_count] ; less than 256 processes

        cmp     ecx, edx

        jne     .exit

        movzx   eax, byte [BTN_COUNT]

        test    eax, eax

        jz      .exit

        mov     eax, [BTN_BUFF]

        and     al, 0xFE                ; delete left button bit

        mov     [BTN_COUNT], byte 0

        mov     [esp + SYSCALL_STACK.eax], eax

;--------------------------------------

align 4

.exit:

        ret

;---------------------------------------------------------------

; @brief system function 8 - define/delete the button

; @param eax = 8 - number function

; @param ebx = [offset_x]*65536 + [width]

; @param ecx = [offset_y]*65536 + [height]

; @param edx = 0xXYnnnnnn, where:

;        nnnnnn = identifier of the button

;        31 bit - delete button

;        30 bit - don't draw button

;        29 bit - don't draw button frame when pressed

; @param esi = 0x00RRGGBB - button color

; @return  function does not return value

syscall_button: