Very basic outline of a text box and a dialog box

Author: jeffsilverm

week-09/code/basic_app_6.py

@@ -0,0 +1,148 @@
+#!/usr/bin/env python
+
+"""
+Example of the very basic, minimal farmework for a wxPython application
+
+This shows how to do a text box and a dialog box
+"""
+
+import wx
+import os
+
+#---------------------------------------------------------------------------
+
+# This is how you pre-establish a file filter so that the dialog
+# only shows the extension(s) you want it to.
+wildcard = "Python source (*.py)|*.py|"     \
+           "Compiled Python (*.pyc)|*.pyc|" \
+           "SPAM files (*.spam)|*.spam|"    \
+           "Egg file (*.egg)|*.egg|"        \
+           "All files (*.*)|*.*"
+
+#---------------------------------------------------------------------------
+
+
+class AppLogic(object):
+    """
+    A class to hold the application Application Logic.
+
+    You generally don't want the real logic of the app mixed
+    in with the GUI
+
+    In a real app, this would be a substantial collection of 
+    modules, classes, etc...
+    """
+    def file_open(self, filename="default_name"):
+        """This method opens a file"""
+        print "Open a file: "
+        print "I'd be opening file: %s now"%filename
+
+    def file_close(self):
+        """This method closes a file"""
+        print "Close a file: "
+        print "I'd be closing a file now"
+
+class ButtonPanel(wx.Panel):
+    def __init__(self, *args, **kwargs):
+        wx.Panel.__init__(self, *args, **kwargs)
+
+        ## add just a single button:
+        self.theButton = wx.Button(self, label="Push Me")
+        self.theButton.Bind(wx.EVT_BUTTON, self.onButton)
+                                   
+    def onButton(self, evt=None):
+        print "You pushed the button!"
+
+class TestFrame(wx.Frame):
+    def __init__(self, app_logic, *args, **kwargs):
+        kwargs.setdefault('title', "Simple test App")
+        wx.Frame.__init__(self, *args, **kwargs)
+
+        self.app_logic = app_logic
+
+        # put the Panel on the frame
+        self.buttonPanel = ButtonPanel(self)
+
+        # Build up the menu bar:
+        menuBar = wx.MenuBar()
+        
+        fileMenu = wx.Menu()
+        openMenuItem = fileMenu.Append(wx.ID_ANY, "&Open", "Open a file" )
+        self.Bind(wx.EVT_MENU, self.onOpen, openMenuItem)
+
+        closeMenuItem = fileMenu.Append(wx.ID_ANY, "&Close", "Close a file" )
+        self.Bind(wx.EVT_MENU, self.onClose, closeMenuItem)
+
+        exitMenuItem = fileMenu.Append(wx.ID_EXIT, "Exit", "Exit the application")
+        self.Bind(wx.EVT_MENU, self.onExit, exitMenuItem)
+        menuBar.Append(fileMenu, "&File")
+        
+        helpMenu = wx.Menu()
+        helpMenuItem = helpMenu.Append(wx.ID_HELP, "Help", "Get help")
+        menuBar.Append(helpMenu, "&Help")
+
+        self.SetMenuBar(menuBar)
+        
+
+    def onOpen(self, evt=None):
+        """This method opens an existing file"""
+        print "Open a file: "
+        # Create the dialog. In this case the current directory is forced as the starting
+        # directory for the dialog, and no default file name is forced. This can easilly
+        # be changed in your program. This is an 'open' dialog, and allows multitple
+        # file selections as well.
+        #
+        # Finally, if the directory is changed in the process of getting files, this
+        # dialog is set up to change the current working directory to the path chosen.
+        dlg = wx.FileDialog(
+            self, message="Choose a file",
+            defaultDir=os.getcwd(), 
+            defaultFile="",
+            wildcard=wildcard,
+            style=wx.OPEN | wx.CHANGE_DIR
+            )
+
+        # Show the dialog and retrieve the user response. If it is the OK response, 
+        # process the data.
+        if dlg.ShowModal() == wx.ID_OK:
+            # This returns a Python list of files that were selected.
+            path = dlg.GetPath()
+            print "I'd be opening file in onOpen ", path
+            self.app_logic.file_open( path )
+        else :
+            print "The file dialog was canceled before anything was selected"
+            
+
+
+
+        # Destroy the dialog. Don't do this until you are done with it!
+        # BAD things can happen otherwise!
+        dlg.Destroy()
+
+
+
+    def onClose(self, evt=None):
+        print "close menu selected"
+        self.app_logic.file_close()
+
+    def onExit(self, evt=None):
+        print "Exit the program here"
+        print "The event passed to onExit is type ", type(evt),
+        self.Close()
+
+
+class TestApp(wx.App):
+    def OnInit(self):
+        """
+        App initilization goes here -- not much to do, in this case
+        """
+        app_logic = AppLogic()
+        f = TestFrame(app_logic, parent=None)
+        f.Show()
+
+        return True
+
+if __name__ == "__main__":
+    app = TestApp(False)
+    app.MainLoop()
+