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By Mac: Draw shapes in a listbox

 
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FreezingFire
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Joined: 23 Jun 2002
Posts: 3508

PostPosted: Sat May 17, 2003 3:03 pm    Post subject: By Mac: Draw shapes in a listbox Reply with quote

This is an example I found by Mac and thought that it may be of
interest to others. Smile

NOTE: For this to work, you must trim all trailing spaces or download
the script directly. Search for a tool to do this on the forum or download
the script directly at:
http://www.sools.com/vds/files/scripts/listdraw.dsc

Failure to do this will result in errors.


Code:
  OPTION SCALE, 96
  TITLE By Mac
  DIALOG CREATE,Draw Shapes Using Chars In A List Box,-1,0,450,355
  DIALOG ADD,STYLE,Style1,Courier,8,B
  DIALOG ADD,STYLE,Style2,Courier,8
  DIALOG ADD,BUTTON,Clear,5,5,36,20
  DIALOG ADD,COMBO,C1,5,46,114,20,,,CLICK
  DIALOG ADD,TEXT,T1,8,170,,,"x1       y1       x2       y2",,Style2
  DIALOG ADD,COMBO,C2,5,189,40,20,0
  DIALOG ADD,COMBO,C3,5,261,40,20,0
  DIALOG ADD,COMBO,C4,5,333,40,20
  DIALOG ADD,COMBO,C5,5,405,40,20
  DIALOG ADD,LIST,L1,30,5,440,320,,Style1
  DIALOG SHOW

  LIST LOADTEXT, C1
"Line x1,y1 to x2,y2
"Circle radius 3
"Circle radius 4
"Circle radius 5
"Circle radius 6
"Circle radius 7
"Circle radius 8
"Circle radius 9
"Circle radius 10
"Circle radius 11

  %x = 1
  REPEAT
    LIST ADD, C2, %x
    LIST ADD, C4, %x
    if @greater(25, %x)
      LIST ADD, C3, %x
      LIST ADD, C5, %x
    end
    %x = @succ(%x)
  UNTIL @greater(%x, 48)
  LIST SEEK, C2, 11
  LIST SEEK, C3, 0
  LIST SEEK, C4, 34
  LIST SEEK, C5, 23

  rem -- load with 48x24 blank spaces (1 - 48 for X , 0 - 23 for Y)
  rem -- Y is modified to use 1 - 24 input in Dot routine --
:ClearBUTTON
  LIST CLEAR, L1
  %y = 0
  REPEAT
    %x = 1
    %s = ""
    REPEAT
      %s = %s" "
      %x = @succ(%x)
    UNTIL @greater(%x, 48)
    LIST ADD, L1, %s
    %y = @succ(%y)
  UNTIL @greater(%y, 23)

:EVLOOP
  WAIT EVENT
  goto @event()

:C1CLICK
  if @equal(@item(C1), "Line x1,y1 to x2,y2")
    %%x1 = @item(C2)
    %%y1 = @item(C3)
    %%x2 = @item(C4)
    %%y2 = @item(C5)
    GOSUB DrawLine
  else
    rem -- Approx center of draw area --
    %x = 24
    %y = 13
    rem -- Get radius --
    %r = @substr(@item(C1), @pred(@len(@item(C1))), @len(@item(C1)))
    GOSUB DrawCircle
  end
  goto EVLOOP

:CLOSE
  EXIT
  STOP

  rem ---- GOSUB Routines ----

:Dot
  rem -- Draw dot at xd, yd --
  %s = @item(L1, @pred(%%yd))
  %s = @strdel(%s, %%xd)
  %s = @strins(%s, %%xd, @chr(174))
  LIST PUT, L1, %s
  exit

:DrawCircle
  rem -- Draw circle at x, y with approx radius of r --
  rem -- Best I could do, list width/height ratio is strange --
  %%xc = %x
  %%yc = %y
  %x = 0
  %y = %r
  %d = @prod(2, @diff(1, %r))
  REPEAT
    %%xd = @sum(%%xc, %x)
    %%yd = @sum(%%yc, %y)
    GOSUB Dot
    %%xd = @sum(%%xc, %x)
    %%yd = @diff(%%yc, %y)
    GOSUB Dot
    %%xd = @diff(%%xc, %x)
    %%yd = @sum(%%yc, %y)
    GOSUB Dot
    %%xd = @diff(%%xc, %x)
    %%yd = @diff(%%yc, %y)
    GOSUB Dot
    if @greater(@sum(%d, %y), 0)
      %y = @pred(%y)
      rem -- The "4" adjusts vertical ellipse --
      %d = @diff(%d, @pred(@prod(4, %y)))
    end
    if @greater(%x, %d)
      %x = @succ(%x)
      rem -- The "2" adjusts horizontal ellipse --
      %d = @sum(%d, @succ(@prod(2, %x)))
    end
  UNTIL @greater(0, %y)
  exit

:DrawLine
  rem -- Draw line from x1,y1 to x2,y2 --
  if @greater(%%x2, %%x1)
    %%dx = @diff(%%x2, %%x1)
    %%sx = 1
  else
    %%dx = @diff(%%x1, %%x2)
    %%sx = -1
  end
  if @greater(%%y2, %%y1)
    %%dy = @diff(%%y2, %%y1)
    %%sy = 1
  else
    %%dy = @diff(%%y1, %%y2)
    %%sy = -1
  end
  %%steep = ""
  if @greater(%%dy, %%dx)
    %%steep = 1
    rem -- swap x1 y1, dx dy, sx sy --
    %z = %%x1
    %%x1 = %%y1
    %%y1 = %z
    %z = %%dx
    %%dx = %%dy
    %%dy = %z
    %z = %%sx
    %%sx = %%sy
    %%sy = %z
  end
  %e = @diff(@prod(2, %%dy), %%dx)
  %i = 0
  REPEAT
    if %%steep
      %%xd = %%y1
      %%yd = %%x1
    else
      %%xd = %%x1
      %%yd = %%y1
    end
    GOSUB Dot
    if @greater(%e, -1)
      REPEAT
        %%y1 = @sum(%%y1, %%sy)
        %e = @diff(%e, @prod(2, %%dx))
      UNTIL @greater(0, %e)
    end
    %%x1 = @sum(%%x1, %%sx)
    %e = @sum(%e, @prod(2, %%dy))
    %i = @succ(%i)
  UNTIL @equal(%i, %%dx)
  %%xd = %%x2
  %%yd = %%y2
  GOSUB Dot
  exit


EDIT: Forgot to copy DrawCircle and DrawLine subs. Added.
EDIT 2: Changed the code again for compatibility with VDS 4

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Last edited by FreezingFire on Sun May 18, 2003 2:12 pm; edited 5 times in total
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Skit3000
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Location: The Netherlands

PostPosted: Sat May 17, 2003 3:54 pm    Post subject: Reply with quote

The script is missing the DrawCircle and DrawLine subs...
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FreezingFire
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PostPosted: Sun May 18, 2003 12:36 pm    Post subject: Reply with quote

You're right. I forgot to copy them. Thanks for reminding me Skit. Very Happy
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Skit3000
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PostPosted: Sun May 18, 2003 1:03 pm    Post subject: Reply with quote

I can't get it to work...

It gives an error 25 on line 101... (Non-numeric value)

[code]%d = @prod(2, @diff(1, %r))[code]

I used the following values:
[code]%d = 0
%r = 5[/code]

I know why the error is, because of the @diff(1,%r), but I don't know how the code works, so I don't want to change things myself... Sad

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FreezingFire
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PostPosted: Sun May 18, 2003 1:58 pm    Post subject: Reply with quote

Yeah I ran into that error before I posted it the second time. But then I
tried it again and it worked fine. Confused

Here's the direct link:
http://www.sools.com/vds/files/scripts/listdraw.dsc

I just wanted to post it on the forum since it probably gets more attention
here.

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PostPosted: Sun May 18, 2003 2:01 pm    Post subject: Reply with quote

Let me try posting it again. It works for me. Just look:


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FreezingFire
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PostPosted: Sun May 18, 2003 2:04 pm    Post subject: Reply with quote

OH! I think I know what is creating the trouble: When you copy text from
a web page it adds extra spaces on to the end. This is what is causing the
trouble I think.

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Skit3000
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PostPosted: Sun May 18, 2003 2:10 pm    Post subject: Reply with quote

If I download it it works. It must be the problem you said, with the extra spaces on the end...
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GeoTrail
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PostPosted: Sun May 18, 2003 2:39 pm    Post subject: Reply with quote

I downloaded the source file and nothing happens.
I try to select different options in the combo and click around but nothing happens.

Is it just me? Embarassed

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Skit3000
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PostPosted: Sun May 18, 2003 2:43 pm    Post subject: Reply with quote

You should use the combo on the left. The other ones are to draw a line.
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PostPosted: Sun May 18, 2003 2:50 pm    Post subject: Reply with quote

I did. Maybe this is for v3.x?

How am I supposed to draw?
Use the keyboard?

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FreezingFire
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PostPosted: Sun May 18, 2003 2:52 pm    Post subject: Reply with quote

The original source file is for 3.x

I had changed it and posted it but it didn't work with the extra spaces.
You need to add commas before the styles to upgrade it to 4.x code.
Take a look at the code posted to see how many commas are needed.

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