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calc.htm

calc.htm 3.9 KB
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  1. <HTML>
    2. 

  2. <HEAD><TITLE>Python Script sample:  Calculator</TITLE></HEAD>
    3. 

  3. <BODY><FONT FACE=ARIAL SIZE=3> <!-- global default -->
    4. 

  4. <SCRIPT LANGUAGE="Python">
    5. 

  5. # globals
    6. 

  6. Accum = 0.0	  # Previous number (operand) awaiting operation
    7. 

  7. FlagNewNum = 1    # Flag to indicate a new number (operand) is being entered
    8. 

  8. NullOp = lambda x,y: y
    9. 

  9. PendingOp = NullOp# Pending operation waiting for completion of second operand
    10. 

  10. numberButNames = ['Zero','One','Two','Three','Four','Five','Six','Seven','Eight','Nine']
    11. 

  11. 

  12. def NumPressed(Num):
    13. 

  13. 	print "NumPressed", Num
    14. 

  14. 	global FlagNewNum
    15. 

  15. 	if FlagNewNum:
    16. 

  16. 		ax.document.Keypad.ReadOut.Value = Num
    17. 

  17. 		FlagNewNum = None
    18. 

  18. 	else:
    19. 

  19. 		if ax.document.Keypad.ReadOut.Value == "0":
    20. 

  20. 			ax.document.Keypad.ReadOut.Value = str(Num)
    21. 

  21. 		else:
    22. 

  22. 			ax.document.Keypad.ReadOut.Value= ax.document.Keypad.ReadOut.Value + str(Num)
    23. 

  23. 

  24. # Dynamically create handlers for all the decimal buttons.
    25. 

  25. # (ie, this will dynamically create "One_OnClick()"... etc handlers
    26. 

  26. for i in range(len(numberButNames)):
    27. 

  27. 	exec "def %s_OnClick():\tNumPressed(%d)\n" % (numberButNames[i],i)
    28. 

  28. 

  29. def Decimal_OnClick():
    30. 

  30. 	global curReadOut, FlagNewNum
    31. 

  31. 	curReadOut = ax.document.Keypad.ReadOut.Value
    32. 

  32. 	if FlagNewNum:
    33. 

  33. 		curReadOut = "0."
    34. 

  34. 		FlagNewNum = None
    35. 

  35. 	else:
    36. 

  36. 		if not ("." in curReadOut):
    37. 

  37. 			curReadOut = curReadOut + "."
    38. 

  38. 	ax.document.Keypad.ReadOut.Value = curReadOut
    39. 

  39. 

  40. import sys, string
    41. 

  41. 

  42. def Operation(Op, fn):
    43. 

  43. 	global FlagNewNum, PendingOp, Accum
    44. 

  44. 	ReadOut = ax.document.Keypad.ReadOut.Value
    45. 

  45. 	print "Operation", Op, ReadOut, PendingOp, Accum
    46. 

  46. 	if FlagNewNum:
    47. 

  47. 		# User is hitting op keys repeatedly, so don't do anything
    48. 

  48. 		PendingOp = NullOp
    49. 

  49. 	else:
    50. 

  50. 		FlagNewNum = 1
    51. 

  51. 		Accum = PendingOp( Accum, string.atof(ReadOut) )
    52. 

  52. 	ax.document.Keypad.ReadOut.Value = str(Accum)
    53. 

  53. 	PendingOp = fn
    54. 

  54. 

  55. def ClearEntry_OnClick():
    56. 

  56. 	# Remove current number and reset state
    57. 

  57. 	global FlagNewNum
    58. 

  58. 	ax.document.Keypad.ReadOut.Value = "0"
    59. 

  59. 	FlagNewNum = 1
    60. 

  60. 

  61. def Clear_OnClick():
    62. 

  62. 	global Accum, PendingOp
    63. 

  63. 	Accum = 0
    64. 

  64. 	PendingOp = NullOp
    65. 

  65. 	ClearEntry_OnClick()
    66. 

  66. 

  67. def Neg_OnClick():
    68. 

  68. 	ax.document.Keypad.ReadOut.Value = str(-string.atof(ax.document.Keypad.ReadOut.Value))
    69. 

  69. </SCRIPT>
    70. 

  70. 

  71. 

  72. <form action="" Name="Keypad">
    73. 

  73. <TABLE>
    74. 

  74. <B>
    75. 

  75. <TABLE BORDER=2 WIDTH=50 HEIGHT=60 CELLPADDING=1 CELLSPACING=5>
    76. 

  76. <CAPTION ALIGN=top> <b>Calculator</b><p> </CAPTION>
    77. 

  77. <TR>
    78. 

  78.  <TD COLSPAN=3 ALIGN=MIDDLE><INPUT NAME="ReadOut" TYPE="Text" SIZE=24 VALUE="0" WIDTH=100%></TD>
    79. 

  79.  <TD></TD>
    80. 

  80.  <TD><INPUT NAME="Clear" TYPE="Button" VALUE="  C  " ></TD>
    81. 

  81.  <TD><INPUT NAME="ClearEntry" TYPE="Button" VALUE="  CE " ></TD>
    82. 

  82. </TR>
    83. 

  83. <TR>
    84. 

  84.  <TD><INPUT NAME="Seven" TYPE="Button" VALUE="  7  " ></TD>
    85. 

  85.  <TD><INPUT NAME="Eight" TYPE="Button" VALUE="  8  " ></TD>
    86. 

  86.  <TD><INPUT NAME="Nine" TYPE="Button" VALUE="  9  " ></TD>
    87. 

  87.  <TD></TD>
    88. 

  88.  <TD><INPUT NAME="Neg" TYPE="Button" VALUE=" +/- " ></TD>
    89. 

  89.  <TD><INPUT NAME="Percent" TYPE="Button" VALUE="  % " OnClick="Operation('%', lambda x,y: x*y/100.0)"></TD>
    90. 

  90. </TR>
    91. 

  91. 

  92. <TR>
    93. 

  93.  <TD><INPUT NAME="Four" TYPE="Button" VALUE="  4  " ></TD>
    94. 

  94.  <TD><INPUT NAME="Five" TYPE="Button" VALUE="  5  " ></TD>
    95. 

  95.  <TD><INPUT NAME="Six" TYPE="Button" VALUE="  6  " ></TD>
    96. 

  96.  <TD></TD>
    97. 

  97.  <TD ALIGN=MIDDLE><INPUT NAME="Plus" TYPE="Button" VALUE="  +  " OnClick="Operation('+', lambda x,y: x+y)"></TD>
    98. 

  98.  <TD ALIGN=MIDDLE><INPUT NAME="Minus" TYPE="Button" VALUE="   -   " OnClick="Operation('-', lambda x,y: x-y)"></TD>
    99. 

  99. </TR>
    100. 

  100. <TR>
    101. 

  101.  <TD><INPUT NAME="One" TYPE="Button" VALUE="  1  " ></TD>
    102. 

  102.  <TD><INPUT NAME="Two" TYPE="Button" VALUE="  2  " ></TD>
    103. 

  103.  <TD><INPUT NAME="Three" TYPE="Button" VALUE="  3  " ></TD>
    104. 

  104.  <TD></TD>
    105. 

  105.  <TD ALIGN=MIDDLE><INPUT NAME="Multiply" TYPE="Button" VALUE="  *  " OnClick="Operation('*', lambda x,y: x*y)" ></TD>
    106. 

  106.  <TD ALIGN=MIDDLE><INPUT NAME="Divide" TYPE="Button" VALUE="   /   " OnClick="Operation('/', lambda x,y: x/y)" ></TD>
    107. 

  107. </TR>
    108. 

  108. <TR>
    109. 

  109.  <TD><INPUT NAME="Zero" TYPE="Button" VALUE="  0  " ></TD>
    110. 

  110.  <TD><INPUT NAME="Decimal" TYPE="Button" VALUE="   .  " ></TD>
    111. 

  111.  <TD COLSPAN=3></TD>
    112. 

  112.  <TD><INPUT NAME="Equals" TYPE="Button" VALUE="  =  " OnClick="Operation('=', lambda x,y: x)"></TD>
    113. 

  113. </TR></TABLE></TABLE></B>
    114. 

  114. </FORM>
    115. 

  115. </FONT></BODY></HTML>
    116. 

  116.