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Simple Windows GUI Calculator (Python)

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1
 

Using wxPython and the Boa Constructor, a VB/Delphi like IDE and Visual Builder, this little calculator was a breeze to make. Boa did 90% of the code generation, and I simply added code to each button click event to make the calculations work. I wish every project would go that easy. Take a look at the commented code.

# wxCalc1 a simple GUI calculator using wxPython
# created with the Boa Constructor which generates all the GUI components
# all I had to do is add some code for each button click event
# Boa free from: http://boa-constructor.sourceforge.net/
# note that    boa-constructor-0.3.1.win32.exe
# still uses   wxPythonWIN32-2.4.2.4-Py23.exe
# but is expected to work with wxPython version 2.5 soon
# tested with Python23   vegaseat    26feb2005


from wxPython.wx import *

# some Boa generated global IDs ...
[wxID_WXFRAME1, wxID_WXFRAME1BTN0, wxID_WXFRAME1BTN1, wxID_WXFRAME1BTN2,
  wxID_WXFRAME1BTN3, wxID_WXFRAME1BTN4, wxID_WXFRAME1BTN5, wxID_WXFRAME1BTN6,
  wxID_WXFRAME1BTN7, wxID_WXFRAME1BTN8, wxID_WXFRAME1BTN9,
  wxID_WXFRAME1BTNCLEAR, wxID_WXFRAME1BTNDIV, wxID_WXFRAME1BTNDOT,
  wxID_WXFRAME1BTNEQUAL, wxID_WXFRAME1BTNMINUS, wxID_WXFRAME1BTNMULTI,
  wxID_WXFRAME1BTNPLUS, wxID_WXFRAME1EDIT,
] = map(lambda _init_ctrls: wxNewId(), range(19))


class wxFrame1(wxFrame):

#startregion, below this marker is Boa generated code do not edit!!!
    def _init_ctrls(self, prnt):
        # generated method, don't edit
        wxFrame.__init__(self, id=wxID_WXFRAME1, name='', parent=prnt,
              pos=wxPoint(306, 270), size=wxSize(266, 265),
              style=wxDEFAULT_FRAME_STYLE, title='Calculator1')
        self.SetClientSize(wxSize(258, 225))
        self.SetBackgroundColour(wxColour(0, 128, 0))

        self.btn1 = wxButton(id=wxID_WXFRAME1BTN1, label='1', name='btn1',
              parent=self, pos=wxPoint(16, 136), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btn1, wxID_WXFRAME1BTN1, self.OnBtn1Button)

        self.btn2 = wxButton(id=wxID_WXFRAME1BTN2, label='2', name='btn2',
              parent=self, pos=wxPoint(64, 136), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btn2, wxID_WXFRAME1BTN2, self.OnBtn2Button)

        self.btn3 = wxButton(id=wxID_WXFRAME1BTN3, label='3', name='btn3',
              parent=self, pos=wxPoint(112, 136), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btn3, wxID_WXFRAME1BTN3, self.OnBtn3Button)

        self.btn4 = wxButton(id=wxID_WXFRAME1BTN4, label='4', name='btn4',
              parent=self, pos=wxPoint(16, 96), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btn4, wxID_WXFRAME1BTN4, self.OnBtn4Button)

        self.btn5 = wxButton(id=wxID_WXFRAME1BTN5, label='5', name='btn5',
              parent=self, pos=wxPoint(64, 96), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btn5, wxID_WXFRAME1BTN5, self.OnBtn5Button)

        self.btn6 = wxButton(id=wxID_WXFRAME1BTN6, label='6', name='btn6',
              parent=self, pos=wxPoint(112, 96), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btn6, wxID_WXFRAME1BTN6, self.OnBtn6Button)

        self.btn7 = wxButton(id=wxID_WXFRAME1BTN7, label='7', name='btn7',
              parent=self, pos=wxPoint(16, 56), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btn7, wxID_WXFRAME1BTN7, self.OnBtn7Button)

        self.btn8 = wxButton(id=wxID_WXFRAME1BTN8, label='8', name='btn8',
              parent=self, pos=wxPoint(64, 56), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btn8, wxID_WXFRAME1BTN8, self.OnBtn8Button)

        self.btn9 = wxButton(id=wxID_WXFRAME1BTN9, label='9', name='btn9',
              parent=self, pos=wxPoint(112, 56), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btn9, wxID_WXFRAME1BTN9, self.OnBtn9Button)

        self.btn0 = wxButton(id=wxID_WXFRAME1BTN0, label='0', name='btn0',
              parent=self, pos=wxPoint(16, 176), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btn0, wxID_WXFRAME1BTN0, self.OnBtn0Button)

        self.btnDot = wxButton(id=wxID_WXFRAME1BTNDOT, label='.', name='btnDot',
              parent=self, pos=wxPoint(64, 176), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btnDot, wxID_WXFRAME1BTNDOT, self.OnBtnDotButton)

        self.btnEqual = wxButton(id=wxID_WXFRAME1BTNEQUAL, label='=',
              name='btnEqual', parent=self, pos=wxPoint(112, 176),
              size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btnEqual, wxID_WXFRAME1BTNEQUAL, self.OnBtnEqualButton)

        self.edit = wxTextCtrl(id=wxID_WXFRAME1EDIT, name='edit', parent=self,
              pos=wxPoint(16, 16), size=wxSize(224, 24), style=0, value='')

        self.btnPlus = wxButton(id=wxID_WXFRAME1BTNPLUS, label='+',
              name='btnPlus', parent=self, pos=wxPoint(160, 56), size=wxSize(32,
              32), style=0)
        EVT_BUTTON(self.btnPlus, wxID_WXFRAME1BTNPLUS, self.OnBtnPlusButton)

        self.btnMinus = wxButton(id=wxID_WXFRAME1BTNMINUS, label='-',
              name='btnMinus', parent=self, pos=wxPoint(160, 96),
              size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btnMinus, wxID_WXFRAME1BTNMINUS, self.OnBtnMinusButton)

        self.btnMulti = wxButton(id=wxID_WXFRAME1BTNMULTI, label='*',
              name='btnMulti', parent=self, pos=wxPoint(160, 136),
              size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btnMulti, wxID_WXFRAME1BTNMULTI, self.OnBtnMultiButton)

        self.btnDiv = wxButton(id=wxID_WXFRAME1BTNDIV, label='/', name='btnDiv',
              parent=self, pos=wxPoint(160, 176), size=wxSize(32, 32), style=0)
        EVT_BUTTON(self.btnDiv, wxID_WXFRAME1BTNDIV, self.OnBtnDivButton)

        self.btnClear = wxButton(id=wxID_WXFRAME1BTNCLEAR, label='C',
              name='btnClear', parent=self, pos=wxPoint(208, 56),
              size=wxSize(32, 32), style=0)
        self.btnClear.SetToolTipString('btnClear')
        EVT_BUTTON(self.btnClear, wxID_WXFRAME1BTNCLEAR, self.OnBtnClearButton)

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

#endregion, above this marker is Boa generated code, do not edit!!!

# now respond to all the button click events ...
    def OnBtn0Button(self, event):
        val = '0'
        # get existing edit box text
        txt = self.edit.GetValue()
        # append text
        txt = txt + val
        # update edit box text
        self.edit.SetValue(txt)

    def OnBtn1Button(self, event):
        val = '1'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtn2Button(self, event):
        val = '2'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtn3Button(self, event):
        val = '3'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtn4Button(self, event):
        val = '4'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)
        
    def OnBtn5Button(self, event):
        val = '5'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtn6Button(self, event):
        val = '6'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtn7Button(self, event):
        val = '7'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtn8Button(self, event):
        val = '8'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtn9Button(self, event):
        val = '9'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtnDotButton(self, event):
        val = '.'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtnEqualButton(self, event):
        txt = self.edit.GetValue()
        # needs to contain a float so eg. 3/5 is 3/5.0
        # otherwise division 3/5 would result in zero
        if '/' in txt:
            if '.' not in txt:
                txt = txt + '.0'
        # now evaluate the math string
        txt = repr(eval(txt))
        # and show result in edit box
        self.edit.SetValue(txt)

    def OnBtnPlusButton(self, event):
        val = '+'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtnMinusButton(self, event):
        val = '-'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtnMultiButton(self, event):
        val = '*'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtnDivButton(self, event):
        val = '/'
        txt = self.edit.GetValue()
        txt = txt + val
        self.edit.SetValue(txt)

    def OnBtnClearButton(self, event):
        self.edit.SetValue('')

# --------------------  end of class wxFrame1 ----------------------

def create(parent):
    return wxFrame1(parent)

class BoaApp(wxApp):
    def OnInit(self):
        wxInitAllImageHandlers()
        self.main = create(None)
        self.main.Show()
        self.SetTopWindow(self.main)
        return True

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

if __name__ == '__main__':
    main()
Member Avatar
vegaseat
DaniWeb's Hypocrite
6,984 posts since Oct 2004
Reputation Points: 1,544 [?]
Q&As Helped to Solve: 1,872 [?]
Skill Endorsements: 67 [?]
Moderator
 
0
 

This code works fine with Python24. It has been modified to form a simple application, so don't try to open it with Boa.

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