DP Tool Club 24/CD_ASCQ_24_0995.iso/dos/tools/aurora21/calcpad.aml

Text File | 1995-08-10 | 9KB | 349 lines

/* ------------------------------------------------------------------ */
/* Macro:        CALCPAD.AML                                          */
/* Written by:   nuText Systems                                       */
/*                                                                    */
/* Description:  This macro displays a simple calculator pad with     */
/*               basic arithmetic operations, a memory, and four      */
/*               display lines. Floating point numbers are not        */
/*               supported. The number on the bottommost display      */
/*               line can be entered into the text of the current     */
/*               edit window.                                         */
/*                                                                    */
/* Usage:        Select this macro from the 'Sample Utility Macros'   */
/*               menu or from the macro picklist <shift f12>. Numbers */
/*               and operations can be entered by using the keyboard  */
/*               or the mouse.                                        */
/*                                                                    */
/*               If you use this macro regularly, it may be           */
/*               convenient to assign it to a key. For example:       */
/*                                                                    */
/*                 object edit                                        */
/*                    :                                               */
/*                   key <alt k>                                      */
/*                     runmac "CALCPAD"                               */
/*                   end                                              */
/* ------------------------------------------------------------------ */

  include bootpath "define.aml"

  // define the colors to use
  define
    set calc_display_color         color darkgray  on green
    set calc_display_curr_color    color black     on green
    set calc_button_color          color black     on green
    set calc_button_hilite_color   color black     on brightgreen
    set calc_client_color          color black     on gray
    set calc_border_color          color white     on gray
    set calc_control_color         color yellow
  end

  // keep this object resident
  stayresident
  inheritfrom "win"

  // display lines
  var line1
  var line2
  var line3
  var line4

  // line number of last lbutton click
  var line
  var bcol

  // display operators
  var op0
  var op1
  var op2
  var op3
  var op4

  // numeric base
  radix = 10

  // clear the calculator display
  function cleardisp
    line1 = ''
    line2 = ''
    line3 = ''
    line4 = 0
    op0 = ' '
    op1 = ' '
    op2 = ' '
    op3 = ' '
    op4 = ' '
  end

  // scroll the display upwards
  function scrollup
    op0   = op1
    line1 = line2
    op1   = op2
    line2 = line3
    op2   = op3
    line3 = line4
    op3   = op4
    line4 = 0
    op4   = ' '
  end

  // perform the operation currently on the display
  function result
    value = case op3
              when '+'  line3 + line4
              when '-'  line3 - line4
              when '*'  line3 * line4
              when '/'  line3 / line4
              when 'm'  line3 mod line4
              when '%'  (line3 * line4) / 100
            end
    scrollup
    line4 = value
  end


  // create the calculator window
  createwindow
  setframe ">b"
  setcolor  border_color    calc_border_color
  setcolor  text_color      calc_client_color
  setcolor  control_color   calc_control_color
  setcolor  border_flash_color   (color brightgreen on gray)
  settitle "Calculator"
  setwinctrl '≡'

  width = 36
  height = 15

  // center the window
  ox = (getvidcols - width) / 2
  oy = (getvidrows - height) / 2
  sizewindow ox oy ox + width oy + height "ad"

  setborder "1i"
  setshadow 2 1

  // define strings to display in the keypad
  keystr = "  C        %   mod   /    CE   7    8    9    *    MR   4    5    6    -    MS   1    2    3    +    M+   0       +/-   =  "

  x = 0
  y = 0

  // draw the keypad
  gotoxy 3 7
  while y < 5 do
    while x < 5 do
      writestr keystr [y * 25 + (x * 5) + 1 : 5]  calc_button_color
      writestr "  "
      x = x + 1
    end
    x = 0
    y = y + 1
    if y < 5 then
      writeline
      writeline
      gotoxy 3
    end
  end

  y = 0
  memory = ''

  // clear the display
  cleardisp

  function draw
    // draw the calculator display
    gotoxy 3 2
    writestr op0 + (pad (thousands line1) 32 'r') calc_display_color
    gotoxy 3 3
    writestr op1 + (pad (thousands line2) 32 'r') calc_display_color
    gotoxy 3 4
    writestr op2 + (pad (thousands line3) 32 'r') calc_display_color
    gotoxy 3 5
    writestr (if? op3 == '=' ' ' op3) + (pad (thousands line4) 32 'r')
             calc_display_curr_color
  end

  draw

  function close
    // call 'close' in object 'win'
    pass
    destroyobject
  end

  function "≡"
    close
  end

  // exit the calculator
  key <esc>
    close
  end

  // mouse click
  function <lbutton>

    // first pass on mouse events to the library
    pass

    case getregion

      // client area
      // translate mouse click to keypress
      when 1
        line = virtorow
        buttonline = case line
                       when 7  "cb%m/"
                       when 9  "e789*"
                       when 11 "r456-"
                       when 13 "s123+"
                       when 15 "z0ti="
                       otherwise ''
                     end

        if buttonline then
          column = virtocol
          bcol = if     column >= 3  and column <= 7  then 1
                 elseif column >= 10 and column <= 14 then 2
                 elseif column >= 17 and column <= 21 then 3
                 elseif column >= 24 and column <= 28 then 4
                 elseif column >= 31 and column <= 35 then 5
                 end

          if bcol then
            buttonchar = buttonline [bcol]
            hilite 5 1 (calc_button_hilite_color) (bcol * 7) - 4  line

            // simulate the appropriate keypress
            if buttonchar then
              queuekey (getkeycode '<'+ buttonchar + '>')
            end
          end
        end
    end
  end

  function <lbuttonup>
    if bcol then
      hilite 5 1 (calc_button_color) (bcol * 7) - 4  line
      bcol = ''
    end
    pass
  end

  // clear the display
  key <del>
    cleardisp

  // enter into text
  key <ctrl enter>
    send "≡"
    queue "write" (thousands line4)

  // backspace
  key <backspace>
    line4 = line4 / radix
    op4 = ' '
    op3 = ' '
    draw
  end

  key <enter>
    if op3 <> ' ' then
      if op3 == '=' then
        op4 = op2
        scrollup
        line4 = line2
      end
      op4 = '='
      result
      draw
    end
  end

  // enter numeric characters
  key <char> (c)
    if pos c "0123456789" then
      if c < radix then
        if op3 == '=' then
          scrollup
        end
        positive = line4 >= 0
        oldline = line4
        line4 = line4 * radix + c
        // test for overflow
        if positive <> (line4 > 0) then
          line4 = oldline
        end
        draw
      end

      // operators
    elseif pos c "+-*/%m" then
      if op3 <> ' ' and op3 <> '=' then
        op4 = '='
        result
      end
      op4 = c
      scrollup
      draw

    elseif c == '=' then
      send <enter>

    // do the current operation
    else
      case c

        when 'c'
          cleardisp

        // clear the entry line
        when 'e'
          line4 = 0
          op4 = ' '
          op3 = ' '

        // store
        when 's'
          memory = line4

        // recall
        when 'r'
          line4 = memory

        // store + memory
        when 'z'
          memory = memory + line4

        // change sign
        when 'i'
          line4 = -line4
          op4 = ' '
          op3 = ' '

        // enter into text
        when 't'
          send <ctrl enter>
          return

        // backspace
        when 'b'
          send <backspace>

        // unrecognized key
        otherwise
          send <otherkey>
      end
      draw
    end
  end

  // unrecognized key
  key <otherkey>
    beep 200 70
  end