[Coco] Syscall to get the window screen and width

[plt]

The application I am running the users can run it on any windows /w1 /w2
/w3 /w4 ect. So I do not know that the user is doing.



On Sat, March 8, 2025 15:49, Wayne Campbell via Coco wrote:
> You should already know which window you are using. Your code should be
> reflecting which window you have currently selected. If you are not doing
> that, then I don't know what to tell you.
>
> On Sat, Mar 8, 2025, 7:28 AM plt via Coco <coco at maltedmedia.com> wrote:
>
>
>>
>> In Basic09 is there a way to find the current window that your using?
>>
>>
>> Thanks
>>
>>
>> On Sat, March 8, 2025 15:11, Wayne Campbell via Coco wrote:
>>
>>> This should work, but I haven't tested it.
>>>
>>>
>>>
>>> TYPE REG=cc,a,b,dp:BYTE; x,y,u:INTEGER
>>> DIM regs:REG \(* registers type
>>> DIM callCode,path:BYTE
>>> DIM erCode,cols,rows:INTEGER
>>>
>>>
>>>
>>> OPEN #path,"/w":READ \ (* open path to window - /w is next available
>>> window, specify which device here callCode:=$8D \(* getstat call
>>> regs.a:=path
>>> regs.b:=$26
>>> RUN SysCall(callCode,regs)
>>> IF LAND(regs.cc,1)<>0 THEN \ (* Carry set on error
>>> erCode:=regs.b \ (* Error code (if any)
>>> (* handle error *)
>>> ELSE
>>> cols:=regs.x
>>> rows:=regs.y
>>> ENDIF
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Sat, Mar 8, 2025, 6:19 AM plt via Coco <coco at maltedmedia.com>
>>> wrote:
>>>
>>>
>>>
>>>>
>>>> I am not sure if this will the screen width and length but can you
>>>> provide a example of how to do the system call and get the return
>>>> results please?
>>>>
>>>> How can you get the current window if /w1 or /w2?
>>>>
>>>>
>>>>
>>>> Chapter 9. System Calls NitrOS-9 EOU Technical Reference Manual
>>>> SS.ScSiz Returns the window or screen size
>>>> Function Code $26
>>>> Entry Conditions:
>>>> A path number
>>>> B $26
>>>> Exit Conditions:
>>>> X number of columns on screen/window
>>>> Y number of rows on screen/window
>>>> Error Output:
>>>> CC carry set on error
>>>> B error code, if any
>>>>
>>>>
>>>>
>>>> Chapter 9. System Calls NitrOS-9 EOU Technical Reference Manual
>>>> SS.ScSiz Returns the window or screen size
>>>> Function Code $26
>>>> Entry Conditions:
>>>> A path number
>>>> B $26
>>>> Exit Conditions:
>>>> X number of columns on screen/window
>>>> Y number of rows on screen/window
>>>> Error Output:
>>>> CC carry set on error
>>>> B error code, if any
>>>>
>>>>
>>>>
>>>> Additional Information:
>>>>
>>>>
>>>>
>>>> • Use this call to determine the size of an output screen.
>>>> The values
>>>> returned depend on the on device in use: ◦ For non-VTIO
>>>> devices, the call returns the COL and ROW values in the device
>>>> descriptor.
>> ◦
>>
>>>> For VTIO/CoVDG devices, the call returns the size of the window or
>>>> screen in use by the specified device (32x16). ◦ For window
>>>> devices, the call returns the size of the of the current working
>>>> area of the window. • This call is handled by CoVDG,
>>>> CoGrf/CoWin, SC6551,
>>>> SC6850, S16550 (and
>>>> any future serial port drivers).
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>>
>>>>
>>>
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>>>
>>>
>>
>>
>>
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