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ChrisBarker-NOAAChrisBarker-NOAA
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added wxpython talk -- stil not fully converted
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‎Examples/wxpython/CalculatorDemo.py‎

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#!/usr/bin/env python
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"""
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wxPython Calculator Demo in 50 lines of code
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This demo was pulled from the wxPython Wiki:
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http://wiki.wxpython.org/CalculatorDemo
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by Miki Tebeka
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It has been altered to allow it to be "driven" by an external script,
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plus a little layout improvement
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"""
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# Calculator GUI:
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# ___________v
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# [7][8][9][/]
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# [4][5][6][*]
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# [1][2][3][-]
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# [0][.][C][+]
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# [ = ]
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from __future__ import division # So that 8/3 will be 2.6666 and not 2
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import wx
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class Calculator(wx.Panel):
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'''Main calculator dialog'''
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def __init__(self, *args, **kwargs):
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wx.Panel.__init__(self, *args, **kwargs)
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sizer = wx.BoxSizer(wx.VERTICAL) # Main vertical sizer
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self.display = wx.ComboBox(self) # Current calculation
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sizer.Add(self.display, 0, wx.EXPAND|wx.BOTTOM, 8) # Add to main sizer
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# [7][8][9][/]
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# [4][5][6][*]
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# [1][2][3][-]
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# [0][.][C][+]
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gsizer = wx.GridSizer(4, 4, 8, 8)
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for row in (("7", "8", "9", "/"),
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("4", "5", "6", "*"),
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("1", "2", "3", "-"),
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("0", ".", "C", "+")):
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for label in row:
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b = wx.Button(self, label=label, size=(40,-1))
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gsizer.Add(b)
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b.Bind(wx.EVT_BUTTON, self.OnButton)
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sizer.Add(gsizer, 1, wx.EXPAND)
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# [ = ]
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b = wx.Button(self, label="=")
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b.Bind(wx.EVT_BUTTON, self.OnButton)
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sizer.Add(b, 0, wx.EXPAND|wx.ALL, 8)
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self.equal = b
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# Set sizer and center
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self.SetSizerAndFit(sizer)
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def OnButton(self, evt):
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'''Handle button click event'''
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# Get title of clicked button
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label = evt.GetEventObject().GetLabel()
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if label == "=": # Calculate
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self.Calculate()
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elif label == "C": # Clear
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self.display.SetValue("")
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else: # Just add button text to current calculation
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self.display.SetValue(self.display.GetValue() + label)
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self.display.SetInsertionPointEnd()
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self.equal.SetFocus() # Set the [=] button in focus
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def Calculate(self):
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"""
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do the calculation itself
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in a separate method, so it can be called outside of a button event handler
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"""
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try:
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compute = self.display.GetValue()
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# Ignore empty calculation
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if not compute.strip():
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return
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# Calculate result
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result = eval(compute)
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# Add to history
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self.display.Insert(compute, 0)
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# Show result
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self.display.SetValue(str(result))
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except Exception, e:
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wx.LogError(str(e))
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return
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def ComputeExpression(self, expression):
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"""
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Compute the expression passed in.
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This can be called from another class, module, etc.
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"""
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print "ComputeExpression called with:", expression
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self.display.SetValue(expression)
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self.Calculate()
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class MainFrame(wx.Frame):
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def __init__(self, *args, **kwargs):
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kwargs.setdefault('title', "Calculator")
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wx.Frame.__init__(self, *args, **kwargs)
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self.calcPanel = Calculator(self)
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# put the panel on -- in a sizer to give it some space
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S = wx.BoxSizer(wx.VERTICAL)
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S.Add(self.calcPanel, 1, wx.GROW|wx.ALL, 10)
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self.SetSizerAndFit(S)
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self.CenterOnScreen()
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if __name__ == "__main__":
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# Run the application
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app = wx.App(False)
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frame = MainFrame(None)
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frame.Show()
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app.MainLoop()
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‎Examples/wxpython/address_book/a_book.json‎

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[
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{
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"phone": "123-456-8888",
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"first_name": "Chris",
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"last_name": "Barker",
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"email": "PythonCHB@gmail.com"
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},
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{
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"phone": "510-555-1234",
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"first_name": "Fred",
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"last_name": "Jones",
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"email": "FredJones@some_company.com"
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},
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{
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"phone": "423-321-9876",
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"first_name": "Nancy",
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"last_name": "Wilson",
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"email": "Wilson.Nancy@gmail.com"
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},
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{
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"phone": "555-555-5555",
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"first_name": "Charles",
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"last_name": "Dickens",
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"email": "chuck@victorian.england.com"
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}
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]

‎Examples/wxpython/address_book/address_book_app.py‎

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#!/usr/bin/env python
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"""
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Example of a very basic, minimal wxPython address book application
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This module defines the main Frame
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"""
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import os
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import wx
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from address_book_data import AddressBook
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from entry_form import AddBookForm
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from switcher import Switcher
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class AddBookFrame(wx.Frame):
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def __init__(self, add_book, *args, **kwargs):
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"""
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initilizer for the main from for the AddressBook app.
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:param add_book: the address book class to manipulate
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:type add_book: A address_book_data.AddressBook instance
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"""
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kwargs.setdefault('title', "Micro Address Book")
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wx.Frame.__init__(self, *args, **kwargs)
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self.add_book = add_book
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self.current_index = 0
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# creae a status bar for messages...
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self.CreateStatusBar()
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# create the entryPanel
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self.entryPanel = AddBookForm(add_book.book[self.current_index], self)
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# put them in a Sizer to lay out
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S = wx.BoxSizer(wx.VERTICAL)
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S.Add(wx.StaticLine(self,style=wx.LI_HORIZONTAL), 0, wx.EXPAND)
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S.Add(self.entryPanel, 0, wx.ALL|wx.EXPAND, 4)
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S.Add((1,5))
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S.Add(wx.StaticLine(self,style=wx.LI_HORIZONTAL), 0, wx.EXPAND)
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self.SetSizerAndFit(S)
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# Build up the menu bar:
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menuBar = wx.MenuBar()
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fileMenu = wx.Menu()
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closeMenuItem = fileMenu.Append(wx.ID_EXIT, "&Close", "Close the file" )
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self.Bind(wx.EVT_MENU, self.onClose, closeMenuItem)
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exitMenuItem = fileMenu.Append(wx.ID_EXIT, "Exit", "Exit the application")
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self.Bind(wx.EVT_MENU, self.onExit, exitMenuItem)
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menuBar.Append(fileMenu, "&File")
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helpMenu = wx.Menu()
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helpMenuItem = helpMenu.Append(wx.ID_HELP, "Help", "Get help")
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menuBar.Append(helpMenu, "&Help")
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self.SetMenuBar(menuBar)
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def next(self):
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"""
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move to the next record in the address book
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"""
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try:
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self.entryPanel.entry = self.add_book.book[self.current_index+1]
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self.current_index+=1
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except IndexError:
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print "At end of records...."
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def previous(self):
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"""
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move to the next record in the address book
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"""
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if self.current_index > 0:
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self.current_index-=1
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self.entryPanel.entry = self.add_book.book[self.current_index]
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def onNewRecord(self, evt=None):
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index = self.add_book.new_record()
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self.entryPanel.entry = self.add_book.book[index]
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def onOpen(self, evt=None):
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"""This method opens an existing file"""
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dlg = wx.FileDialog(
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self, message="Choose a file",
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defaultDir=os.getcwd(),
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defaultFile="",
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wildcard="*.json",
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style=wx.OPEN | wx.CHANGE_DIR
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)
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# Show the dialog and retrieve the user response. If it is the OK response,
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# process the data.
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if dlg.ShowModal() == wx.ID_OK:
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# This returns a Python list of files that were selected.
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path = dlg.GetPath()
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print "I'd be opening file in onOpen ", path
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self.add_book.load_from_file(filename=path)
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else :
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print "The file dialog was canceled"
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dlg.Destroy()
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def onClose(self, evt=None):
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print "close menu selected"
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self.add_book.close()
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def onExit(self, evt=None):
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print "Exit the program here"
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print "The event passed to onExit is type ", type(evt),
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self.Close()
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class AddBookApp(wx.App):
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def OnInit(self):
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"""
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App initilization goes here -- not much to do, in this case
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"""
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a_book = AddressBook()
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a_book.load_from_file()
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f = AddBookFrame(a_book, parent=None)
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f.Show()
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return True
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if __name__ == "__main__":
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app = AddBookApp(False)
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## set up the WIT -- to help debug sizers
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import wx.lib.inspection
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wx.lib.inspection.InspectionTool().Show()
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app.MainLoop()
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‎Examples/wxpython/address_book/address_book_data.py‎

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#!/usr/bin/env python
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"""
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application logic code for ultra simple
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address book app...
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"""
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import json
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class AddressBook(object):
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"""
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very simple data model -- just a list of dicts
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each dict represents an entry in the address book
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"""
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fields = [ "phone",
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"first_name",
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"last_name",
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"email",
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]
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def __init__(self, filename="a_book.json"):
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self.filename = filename
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self.book = []
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self.new_record()
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def new_record(self):
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"""
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and a new, empty record
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:returns index: index of the new, empty record
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"""
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self.book.append(dict.fromkeys(self.fields, ""))
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return len(self.book) - 1
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def save_to_file(self, filename=None):
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if filename is not None :
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self.filename = filename
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json.dump(self.book, open(self.filename, 'wb'), indent=4 )
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def load_from_file(self, filename=None):
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if filename is not None :
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self.filename = filename
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self.book = json.load( open(self.filename, 'rb') )
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def close(self):
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"""
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clear out the data...
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leave it with one empty dict
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"""
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del self.book[:]
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self.book.append({})
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if __name__ == "__main__":
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import pprint
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a_book = AddressBook()
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a_book.load_from_file()
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print "the data in the address book is:"
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pprint.pprint(a_book.book)
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print
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print "the first entry is:"
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entry = a_book.book[0]
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print entry
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print "the first entry's name is:"
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print entry['first_name'], entry['last_name']
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