math worksheet Code

#Copyright 2009 - Ram Gupta
#This program is distributed under the terms of GNU General Public Licence(GPL)
#
# -*- coding: cp1252 -*-
import wx
from array import array
import random
import AnswerWindow
import MinFrame
class MyWindow(wx.ScrolledWindow):
    def __init__(self,parent,ops,kind,count):
        
        self.parent = parent
        id = -1
        wx.ScrolledWindow.__init__(self, parent,id)
        self.Bind(wx.EVT_PAINT, self.OnPaint)
        self.Bind(wx.EVT_RIGHT_DOWN, self.OnRightDown)
        self.Bind(wx.EVT_RIGHT_UP, self.OnRightUp)
        self.SetScrollbars(1, 1, 1000, 40*count, 0, 0)
        self.SetBackgroundColour("WHITE")
        self.scroller = wx.lib.dragscroller.DragScroller(self)
        self.SetOps(ops)
        parent.SetTitle(self.oper_str +"  Worksheet")
        self.SetOpsType(kind)
        self.count = count
        self.num_first = array('i')
        self.num_sec = array('i')
        self.answer = array('i')
        self.d = {}
        for i in range(self.count):
            num1 = random.randint(self.start1,self.end1)
            num2 = random.randint(self.start2,self.end2)
            if num1 < num2:
                temp = num1
                num1 = num2
                num2 = temp
            if self.ops == 3:
                if num2 ==0:
                   num2 =1   
                self.num_first.append(num1*num2)
            else:
                self.num_first.append(num1)
            self.num_sec.append(num2)
        for i in range(self.count/5):
            for column in range(5):   
                text =  wx.TextCtrl(self,10+5*i +column,"",wx.Point( column*200+10,100*i +150),wx.Size(40,20))
                self.d[10+5*i +column] = text
                      
        self.answer = wx.Button(self, 12, "Get Answers", wx.Point(410 , 20*self.count +100))
        self.close = wx.Button(self, 13, "Close", wx.Point(410 , 20*self.count +140))
        wx.EVT_BUTTON(self, 12, self.OnAnswer)
        wx.EVT_BUTTON(self,13,self.OnClose)
        

    def OnAnswer(self,event):
        frame2 = MinFrame.MinFrame(self,-1,(720,620))
        frame2.mywindow = self
        #for i in range
        self.d[16].Disable()
        panel1 = AnswerWindow.AnswerWindow(frame2,self.count)
        frame2.Show(1)
        
    def OnClose(self,event):
        self.parent.Destroy()
        
    def SetOps(self,ops):
        self.ops = ops
        if ops == 0:
            self.oper = "+"
            self.oper_str = "Addition"
        if ops == 1:
            self.oper = "-"
            self.oper_str = "Subtraction"
        if ops == 2:
            self.oper = "x"
            self.oper_str = "Multiplication"
        if ops == 3:
            #self.oper = "/"
            self.oper = u"÷"
            self.oper_str = "Division"
            
    def SetOpsType(self,kind):
        if kind == 0:
            self.start1 = 0
            self.start2 = 0
            self.end1 = 12
            self.end2 = 12
            
        elif kind == 1:
            self.start1 = 10
            self.start2 = 0
            self.end1   = 99
            self.end2 = 9
            
        elif kind == 2:
            self.start1 = 10
            self.start2 = 10
            self.end1   = 99
            self.end2   = 99
            
        elif kind == 3:
            self.start2 = 0
            self.start1 = 100            
            self.end1   = 999
            self.end2   = 9
            
        elif kind == 4:
            self.start1 = 100
            self.start2 = 10
            self.end1   = 999
            self.end2   = 99
            
        else:
            self.start1 = 100
            self.start2 = 100
            self.end1   = 999
            self.end2   = 999    
        
    def OnPaint(self,event):
        dc = wx.PaintDC(self)
        self.DoPrepareDC(dc)
        pen = wx.Pen(wx.BLACK, 1)
        dc.SetPen(pen)
        dc.Clear()
        te = dc.GetTextExtent(self.oper_str+"  WorkSheet")
        w,h = self.GetSize()
        dc.SetFont(wx.Font(14, wx.SWISS, wx.NORMAL, wx.BOLD))
        dc.DrawText(self.oper_str+"  WorkSheet",(w - te[0])/2,20)
        dc.DrawLine(20, 40, w -20, 40)
        for i in range(self.count/5):
            for column in range(5):
                index = i*5 + column
                num1 = self.num_first[index]
                num2 = self.num_sec[index]
                
                len_diff = len(str(num1)) -len(str(num2))
                if len_diff > 0:
                    sec = " "*len_diff + str(num2)
                    first =str(num1)
                    space = len_diff
                else:
                    first = " "+str(num1)
                    sec = str(num2)
                    space =2
                pen = wx.Pen(wx.BLACK, 1) 
                dc.SetPen(pen)
                dc.SetFont(wx.Font(12, wx.SWISS, wx.NORMAL, wx.BOLD))
                dc.DrawText(str(i*5 + column +1)+".",( column*200 +10),100*i +80)
                dc.SetFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.NORMAL))
                dc.DrawText(first,(30 + column*200) ,100*i +100)
                dc.DrawText(self.oper+sec,(column*200 +30-1-space),100*i +120)
                dc.SetTextForeground(wx.BLACK)
                dc.DrawLine(10+column*200,100*i +140,50 + column*200,100*i +140)
                
    def OnRightDown(self, event):
        self.scroller.Start(event.GetPosition())

    def OnRightUp(self, event):
        self.scroller.Stop()