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text colour printing to screen

 
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alangr



Joined: 24 Oct 2016
Posts: 40
Location: Oxford,UK and Athens, Greece

PostPosted: Mon Jan 09, 2023 5:41 pm    Post subject: text colour printing to screen Reply with quote

I am doing some very simple text handling and want to have a choice of colours with the results put on screen. In FTN77, I used COUP@ and this still works with FTN95 although I cannot find any reference to in in the User Notes and I have not been able to get the blinking aspect to work.

How should I put a character to the screen with a specified colour; and is it possible to make it blink?

Thanks.
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PaulLaidler
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Joined: 21 Feb 2005
Posts: 7550
Location: Salford, UK

PostPosted: Mon Jan 09, 2023 7:58 pm    Post subject: Reply with quote

Alan

I am guessing that you are writing to a DOS box. Perhaps you could post a short sample program that illustrates what you can do at the moment.

Writing coloured text in a Windows application is quite simple using ClearWin+ but text that blinks may be more tricky.

The lack of documentation for COUP@ etc. simply reflects the fact that such routines have become outmoded.
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alangr



Joined: 24 Oct 2016
Posts: 40
Location: Oxford,UK and Athens, Greece

PostPosted: Tue Jan 10, 2023 10:21 am    Post subject: Reply with quote

Paul

I am writing to the screen from DOS but not formally a 'DOS box'. Essentially I am doing what I had done in FTN77. As an example this is intended to provide an alternating green/red character on screen. When I run this code step by step all is well. when I just run it the screen remains blank until about 15 seconds has passed and execution stops.

DO 10 K=1,15
COLR=2
CALL COUP@(TILE, COLR, IV, IH)
CALL SLEEP@(1)
COLR=4
CALL COUP@(TILE, COLR, IV, IH)
10 CONTINUE

If I had set one of the two COUP@ calls to colour black, I was hoping to make the character on screen blink slowly.

I quite understand the fact that the COUP@ is now outmoded but wish to do something like this using FTN95.

I have not used ClearWin+ yet; is this my way forward?

Sorry, coming to this from the past.
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PaulLaidler
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Joined: 21 Feb 2005
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PostPosted: Tue Jan 10, 2023 1:00 pm    Post subject: Reply with quote

Alan

I was asking for a short working program that one could run without modification.

Maybe it would then be possible to transcribe this into ClearWin+ to get you started.
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alangr



Joined: 24 Oct 2016
Posts: 40
Location: Oxford,UK and Athens, Greece

PostPosted: Tue Jan 10, 2023 4:08 pm    Post subject: Reply with quote

Paul

Here is the body of a program that works to produce a character alternating from green to red. With SDBG stepping through gives the desired effect. Running the program (F6) just gives a blank screen until the loop is complete.

PROGRAM TEST
*
INTEGER*2 K, IH, IV, COLR
CHARACTER TILE*1
*
CALL CLEAR_SCREEN@
*
TILE=CHAR(35)
IH=5
IV=7
*
DO 10 K=1,15
COLR=2
*
CALL COUP@(TILE, COLR, IH, IV)

CALL SLEEP@(1)
*
COLR=4
CALL COUP@(TILE, COLR, IH, IV)
*
CALL SLEEP@(1)
10 CONTINUE
*
STOP
*
END

I would welcome your comments of moving this to ClearWin+

Thanks
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PaulLaidler
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Joined: 21 Feb 2005
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PostPosted: Tue Jan 10, 2023 8:46 pm    Post subject: Reply with quote

Here is a sample program that uses %tx to create the equivalent of a DOS box with coloured text. If it is relevant then I can think about how to make part of the text blink. It is also possible to write coloured text using %eb.

Code:
      winapp
      program main
      integer,parameter::NCOLS=80,NROWS=25,NCHRS=NCOLS*NROWS
      character text(NCOLS,NROWS),attr(NCOLS,NROWS)
      character(len=NCHRS) txt
      equivalence(text,txt)
      txt = " "
      attr = char(0)
      txt(1  :80)  = "First line"
      txt(81 :160) = "Second line"
      txt(161:240) = "Third line"
      attr(:,1) = char(1) !Attribute index for row 1
      attr(:,2) = char(2) !Attribute index for row 2
      attr(:,3) = char(3) !Attribute index for row 3
      iw = winio@('%80.25tx&',text,attr,NCOLS,NROWS)
      iw = winio@('%tc[blue]%ty[white]&') !Text colour and back colour for index 1
      iw = winio@('%tc[red]%ty[white]&')  !Text colour and back colour for index 2
      iw = winio@('%tc[white]%ty[black]') !Text colour and back colour for index 3
      end program
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alangr



Joined: 24 Oct 2016
Posts: 40
Location: Oxford,UK and Athens, Greece

PostPosted: Wed Jan 11, 2023 8:15 am    Post subject: Reply with quote

Thank you for your response.

I will see what I can do working from your example. I think the flashing aspect is not a priority right now.

Thank you for your help.
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PaulLaidler
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Joined: 21 Feb 2005
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PostPosted: Wed Jan 11, 2023 9:55 am    Post subject: Reply with quote

Here is a better sample for writing coloured text to a DOS box array of characters. Readers should note that writing text to a window is normally very simple as in iw = winio@("Hello World").

Code:
winapp
module txmod
 use clrwin
 integer,parameter::NCOLS=80,NROWS=25
 character(len=NCOLS)::lines(NROWS),attr(NROWS)
 integer ctrl
 
contains
 integer function dialog()
  integer i
  do i = 1,NROWS
   attr(i)  = repeat(char(0),NCOLS)
   lines(i) = " "
  end do
  iw = winio@('%pv%*.*tx&',NCOLS,NROWS,lines,attr,NCOLS,NROWS)
  iw = winio@('%tc[#0000ff]%ty[#ffffff]&') !char(1)
  iw = winio@('%tc[#ff0000]%ty[#ffffff]&') !char(2)
  iw = winio@('%tc[#ffffff]%ty[#000000]&') !char(3)
  iw = winio@('%lw',ctrl)
  dialog = iw
 end function

 subroutine WriteLine(lineNo, attrNo, str)
  integer lineNo, attrNo
  character(*) str
  lines(lineNo) = str
  attr(lineNo) = repeat(char(attrNo),NCOLS)
 end subroutine
 
end module txmod

program main
 use txmod
 iw = dialog()
 call WriteLine(1, 2, "First line")
 call WriteLine(2, 3, "Second line")
 call WriteLine(3, 1, "Third line")
 call window_update@(lines)
end program
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