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A little program to convert angles to and from Decimal degrees, Degrees decimal minutes and Degrees minutes decimal seconds.

#!/usr/bin/env python

import wx
import math
   



[wxID_FRAME1, wxID_FRAME1CHOICE1, wxID_FRAME1CHOICE2, wxID_FRAME1PANEL1, 
 wxID_FRAME1STATICTEXT1, wxID_FRAME1STATICTEXT2, wxID_FRAME1STATICTEXT3, 
 wxID_FRAME1STATICTEXT4, wxID_FRAME1STATICTEXT5, wxID_FRAME1STATICTEXT6, 
 wxID_FRAME1STATICTEXT7, wxID_FRAME1TEXTCTRL1, wxID_FRAME1TEXTCTRL2, 
 wxID_FRAME1TEXTCTRL3, wxID_FRAME1TEXTCTRL4, 
] = [wx.NewId() for _init_ctrls in range(15)]

class Frame1(wx.Frame):
    def _init_ctrls(self, prnt):
        # generated method, don't edit
        wx.Frame.__init__(self, id=wxID_FRAME1, name='', parent=prnt,
              pos=wx.Point(320, 268), size=wx.Size(764, 405),
              style=wx.DEFAULT_FRAME_STYLE, title=u'Degrees converter')
        self.SetClientSize(wx.Size(764, 405))

        self.panel1 = wx.Panel(id=wxID_FRAME1PANEL1, name='panel1', parent=self,
              pos=wx.Point(0, 0), size=wx.Size(764, 405),
              style=wx.TAB_TRAVERSAL)

        self.choice1 = wx.Choice(choices=['Decimal degrees:  dd.dddd',
              'Degrees, decimal minutes:   dd mm.mmmm',
              'Degrees, minutes, decimal seconds:  dd mm ss.ssss'],
              id=wxID_FRAME1CHOICE1, name='choice1', parent=self.panel1,
              pos=wx.Point(216, 63), size=wx.Size(500, 32), style=0)
        self.choice1.SetStringSelection(u'Decimal degrees, Degrees decimal minutes, Degrees minutes decimal seconds')
        self.choice1.SetSelection(3)
        self.choice1.SetFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.BOLD, False,
              u'Sans'))
        self.choice1.SetMinSize(wx.Size(500, 32))
        self.choice1.Bind(wx.EVT_CHOICE, self.OnChoice1Choice,
              id=wxID_FRAME1CHOICE1)

        self.staticText1 = wx.StaticText(id=wxID_FRAME1STATICTEXT1,
              label=u'Convert from:', name='staticText1', parent=self.panel1,
              pos=wx.Point(47, 68), size=wx.Size(125, 19), style=0)
        self.staticText1.SetFont(wx.Font(12, wx.SWISS, wx.NORMAL, wx.BOLD,
              False, u'Sans'))

        self.staticText2 = wx.StaticText(id=wxID_FRAME1STATICTEXT2,
              label=u'Convert to:', name='staticText2', parent=self.panel1,
              pos=wx.Point(47, 221), size=wx.Size(102, 19), style=0)
        self.staticText2.SetFont(wx.Font(12, wx.SWISS, wx.NORMAL, wx.BOLD,
              False, u'Sans'))

        self.choice2 = wx.Choice(choices=['Decimal degrees:  dd.dddd',
              'Degrees, decimal minutes:  dd mm.mmmm',
              'Degrees, minutes, decimal seconds:  dd mm ss.ssss'],
              id=wxID_FRAME1CHOICE2, name='choice2', parent=self.panel1,
              pos=wx.Point(216, 216), size=wx.Size(500, 32), style=0)
        self.choice2.SetFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.BOLD, False,
              u'Sans'))
        self.choice2.SetMinSize(wx.Size(500, 32))
        self.choice2.Bind(wx.EVT_CHOICE, self.OnChoice2Choice,
              id=wxID_FRAME1CHOICE2)

        self.staticText3 = wx.StaticText(id=wxID_FRAME1STATICTEXT3,
              label=u'Enter value:', name='staticText3', parent=self.panel1,
              pos=wx.Point(47, 146), size=wx.Size(106, 19), style=0)
        self.staticText3.SetFont(wx.Font(12, wx.SWISS, wx.NORMAL, wx.BOLD,
              False, u'Sans'))

        self.textCtrl1 = wx.TextCtrl(id=wxID_FRAME1TEXTCTRL1, name='textCtrl1',
              parent=self.panel1, pos=wx.Point(216, 143), size=wx.Size(104, 27),
              style=0, value=u'')
        self.textCtrl1.SetMinSize(wx.Size(33, 27))
        self.textCtrl1.SetToolTipString(u'enter value =< 360')

        self.staticText4 = wx.StaticText(id=wxID_FRAME1STATICTEXT4,
              label=u'Converted value:', name='staticText4', parent=self.panel1,
              pos=wx.Point(47, 302), size=wx.Size(151, 19), style=0)
        self.staticText4.SetFont(wx.Font(12, wx.SWISS, wx.NORMAL, wx.BOLD,
              False, u'Sans'))

        self.textCtrl2 = wx.TextCtrl(id=wxID_FRAME1TEXTCTRL2, name='textCtrl2',
              parent=self.panel1, pos=wx.Point(344, 143), size=wx.Size(104, 27),
              style=0, value=u'0')
        self.textCtrl2.SetMinSize(wx.Size(104, 27))
        self.textCtrl2.Show(False)
        self.textCtrl2.SetToolTipString(u'enter value < 60')

        self.textCtrl3 = wx.TextCtrl(id=wxID_FRAME1TEXTCTRL3, name='textCtrl3',
              parent=self.panel1, pos=wx.Point(480, 143), size=wx.Size(104, 27),
              style=0, value=u'0')
        self.textCtrl3.Show(False)
        self.textCtrl3.SetToolTipString(u'enter value < 60')

        self.textCtrl4 = wx.TextCtrl(id=wxID_FRAME1TEXTCTRL4, name='textCtrl4',
              parent=self.panel1, pos=wx.Point(216, 296), size=wx.Size(184, 27),
              style=0, value=u'')

        self.staticText5 = wx.StaticText(id=wxID_FRAME1STATICTEXT5,
              label=u'Degrees', name='staticText5', parent=self.panel1,
              pos=wx.Point(224, 172), size=wx.Size(54, 17), style=0)

        self.staticText6 = wx.StaticText(id=wxID_FRAME1STATICTEXT6,
              label=u'Minutes', name='staticText6', parent=self.panel1,
              pos=wx.Point(352, 172), size=wx.Size(50, 17), style=0)
        self.staticText6.Show(False)

        self.staticText7 = wx.StaticText(id=wxID_FRAME1STATICTEXT7,
              label=u'Seconds', name='staticText7', parent=self.panel1,
              pos=wx.Point(488, 172), size=wx.Size(55, 17), style=0)
        self.staticText7.Show(False)

    def __init__(self, parent):
        self._init_ctrls(parent)

    def OnChoice1Choice(self, event):
         self.textCtrl1.SetValue("0")
         self.textCtrl2.SetValue("0")
         self.textCtrl3.SetValue("0")
         self.textCtrl4.SetValue(" ")
         x = self.choice1.GetSelection()
         if x == 0:
              self.textCtrl2.Show(False)
              self.staticText6.Show(False)
              self.textCtrl3.Show(False)
              self.staticText7.Show(False)
         if x == 1:
              self.textCtrl2.Show(True)
              self.staticText6.Show(True)
              self.textCtrl3.Show(False)
              self.staticText7.Show(False)
         if x ==2:
              self.textCtrl2.Show(True)
              self.staticText6.Show(True)
              self.textCtrl3.Show(True)
              self.staticText7.Show(True)
              
    

    def OnChoice2Choice(self, event):
        if float(self.textCtrl1.GetValue()) >= 360:
            self.textCtrl1.SetValue(" ")
            
        if float(self.textCtrl2.GetValue()) >= 60:
            self.textCtrl2.SetValue(" ")
            
        if float(self.textCtrl3.GetValue()) >= 60:
            self.textCtrl3.SetValue(" ")
            
        self.textCtrl4.SetValue(" ")
        def x0y1():
            str_txt = self.textCtrl1.GetValue()
            degrees = float(str_txt)
            dd = math.modf(degrees)
            calc = str(int(dd[1]))
            mm = str(dd[0]*60)
            calc = calc +" -- " + mm
            self.textCtrl4.SetValue(calc)
            
        def x0y2():
            str_txt = self.textCtrl1.GetValue()
            degrees = float(str_txt)
            dd = math.modf(degrees)
            calc = str(int(dd[1]))
            mm = dd[0]*60
            ss = math.modf(mm)
            mins = str(int(ss[1]))
            secs = str(ss[0]*60)
            calc = calc + " -- " + mins + " -- " + secs
            self.textCtrl4.SetValue(calc)
            
        def x1y0():
            txtdeg = self.textCtrl1.GetValue()
            deg = float(txtdeg)
            txtmins = self.textCtrl2.GetValue()
            mins = float(txtmins)/60
            value = deg + mins
            calc = str(value)
            self.textCtrl4.SetValue(calc)
             
            
        def x1y2():
            txtdeg = self.textCtrl1.GetValue()
            txtmins = self.textCtrl2.GetValue()
            mm = float(txtmins)
            ss = math.modf(mm)
            mins = str(int(ss[1]))
            calc = txtdeg + " -- " + mins + " -- " + str(ss[0]*60)
            self.textCtrl4.SetValue(calc)
            
        def x2y0():
            txtdeg = self.textCtrl1.GetValue()
            txtmins = self.textCtrl2.GetValue()
            txtsecs = self.textCtrl3.GetValue()
            deg = float(txtdeg)
            mins = float(txtmins)/60
            secs = float(txtsecs)/3600
            calc = deg + mins + secs
            self.textCtrl4.SetValue(str(calc))
            
        def x2y1():
            txtdeg = self.textCtrl1.GetValue()
            txtmins = self.textCtrl2.GetValue()
            txtsecs = self.textCtrl3.GetValue()
            secs = float(txtsecs)/60
            mins = float(txtmins) + secs
            calc = txtdeg + " - " +str(mins)
            self.textCtrl4.SetValue(str(calc))
        
        x = self.choice1.GetSelection()
        y = self.choice2.GetSelection()
        if x == 0 and y == 0:
            return
        if x == 1 and y == 1:
            return
        if x == 2 and y == 2:
            return
        if x == 0 and y == 1:
            x0y1()
        if x == 0 and y == 2:
            x0y2()
        if x == 1 and y == 0:
            x1y0()
        if x == 1 and y == 2:
            x1y2()
        if x == 2 and y == 0:
            x2y0()
        if x == 2 and y == 1:
            x2y1()    

            
def create(parent):
    return Frame1(parent)

class MyApp(wx.App):
    def OnInit(self):
        wx.InitAllImageHandlers()
        self.main = create(None)
        self.main.Show()
        self.SetTopWindow(self.main)
        return True

def main():
    application = MyApp(0)
    application.MainLoop()

if __name__ == '__main__':
    main()