re-shuffled app versions 6 and 7...

Author: Chris Barker

week-09/code/basic_app_6.py

@@ -1,18 +1,17 @@
 #!/usr/bin/env python
 
 """
-Example of the very basic, minimal farmework for a wxPython application
+Example of the very basic, minimal framework for a wxPython application
 
-This shows how to do a text box and a dialog box
+This version adds a BoxSizer for laying out buttons on the panel
 """
 
 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.
+# This is how you pre-establish a file filter so that file dialogs
+# only show the extension(s) you want it to.
 wildcard = "Python source (*.py)|*.py|"     \
            "Compiled Python (*.pyc)|*.pyc|" \
            "SPAM files (*.spam)|*.spam|"    \
@@ -21,7 +20,6 @@
 
 #---------------------------------------------------------------------------
 
-
 class AppLogic(object):
     """
     A class to hold the application Application Logic.
@@ -46,12 +44,27 @@ 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)
-                                   
+        ## add two buttons:
+        theButton1 = wx.Button(self, label="Push Me")
+        theButton1.Bind(wx.EVT_BUTTON, self.onButton)
+
+        ## add two buttons:
+        theButton2 = wx.Button(self, label="Push Me Also")
+        theButton2.Bind(wx.EVT_BUTTON, self.onButton)
+
+        ## do the layout
+        ## (try uncommenting the other, and see what happens...)
+        S = wx.BoxSizer(wx.VERTICAL)
+        #S = wx.BoxSizer(wx.HORIZONTAL)
+        
+        S.Add(theButton1, 0, wx.GROW | wx.ALL, 4)
+        S.Add(theButton2, 0, wx.GROW | wx.ALL, 4)
+        
+        self.SetSizerAndFit(S)
+        
     def onButton(self, evt=None):
-        print "You pushed the button!"
+        print "You pushed one of the buttons!"
+
 
 class TestFrame(wx.Frame):
     def __init__(self, app_logic, *args, **kwargs):
@@ -83,13 +96,12 @@ def __init__(self, app_logic, *args, **kwargs):
 
         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
+        # directory for the dialog, and no default file name is forced. This can easily
+        # be changed in your program. This is an 'open' dialog, and allows multiple
         # file selections as well.
         #
         # Finally, if the directory is changed in the process of getting files, this
@@ -111,16 +123,11 @@ def onOpen(self, evt=None):
             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()

week-09/code/basic_app_6b.py renamed to week-09/code/basic_app_7.py

@@ -3,11 +3,23 @@
 """
 Example of the very basic, minimal framework for a wxPython application
 
-This version adds a BoxSizer for laying out buttons on the panel
+This adds a text box and a dialog box
 """
 
+
 import wx
 
+#---------------------------------------------------------------------------
+
+# This is how you pre-establish a file filter so that file dialogs
+# only show 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):
     """
@@ -85,10 +97,37 @@ def __init__(self, app_logic, *args, **kwargs):
 
         self.SetMenuBar(menuBar)
 
-
     def onOpen(self, evt=None):
-        print "open menu selected"
-        self.app_logic.file_open()
+        """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 easily
+        # be changed in your program. This is an 'open' dialog, and allows multiple
+        # 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"

week-09/presentation-week09.pdf

@@ -648,17 +648,12 @@ \section{Basic Structure}
 %-------------------------------
 \begin{frame}[fragile]{Sizer Example}
 
-{\Large The Basic \verb`BoxSizer`}
-
-\vfill
-{\large Lays out a row or column of controls...}
-
-\vfill
-{\Large Adding an item to a sizer:} 
-{ \verb`Sizer.Add( window, proportion, flag, border )` }
+{\Large The Basic \verb`BoxSizer`}\\
+{\large  -- Lays out a row or column of controls...}
 
 \vfill
 \begin{verbatim}
+Sizer.Add( window, proportion, flag, border )
         ## do the layout
         S = wx.BoxSizer(wx.VERTICAL)
         
@@ -667,7 +662,6 @@ \section{Basic Structure}
         
         self.SetSizerAndFit(S)
 \end{verbatim}
-
 \vfill
 code: \verb`code\basic_app_6.py`
 \end{frame}