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Chris BarkerChris Barker
Chris Barker
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Chris Barker
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added sizer example
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‎week-09/code/basic_app_3.py

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@@ -167,9 +167,6 @@ def onOpen(self, evt=None):
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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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# Destroy the dialog. Don't do this until you are done with it!
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# BAD things can happen otherwise!
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dlg.Destroy()
@@ -196,6 +193,6 @@ def OnInit(self):
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return True
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if __name__ == "__main__":
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app = TestApp()
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app = TestApp(False)
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app.MainLoop()
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‎week-09/code/basic_app_5.py

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#!/usr/bin/env python
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"""
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Example of the very basic, minimal farmework for a wxPython application
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Example of the very basic, minimal framework for a wxPython application
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This version adds a basic menu bar with a file menu
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This version adds a panel for the controls.
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"""
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import wx

‎week-09/code/basic_app_6b.py

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#!/usr/bin/env python
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"""
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Example of the very basic, minimal framework for a wxPython application
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This version adds a BoxSizer for laying out buttons on the panel
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"""
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import wx
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class AppLogic(object):
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"""
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A class to hold the application Application Logic.
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You generally don't want the real logic of the app mixed
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in with the GUI
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In a real app, this would be a substantial collection of
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modules, classes, etc...
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"""
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def file_open(self, filename="default_name"):
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"""This method opens a file"""
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print "Open a file: "
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print "I'd be opening file: %s now"%filename
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def file_close(self):
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"""This method closes a file"""
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print "Close a file: "
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print "I'd be closing a file now"
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class ButtonPanel(wx.Panel):
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def __init__(self, *args, **kwargs):
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wx.Panel.__init__(self, *args, **kwargs)
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## add two buttons:
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theButton1 = wx.Button(self, label="Push Me")
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theButton1.Bind(wx.EVT_BUTTON, self.onButton)
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## add two buttons:
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theButton2 = wx.Button(self, label="Push Me Also")
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theButton2.Bind(wx.EVT_BUTTON, self.onButton)
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## do the layout
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## (try uncommenting the other, and see what happens...)
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S = wx.BoxSizer(wx.VERTICAL)
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#S = wx.BoxSizer(wx.HORIZONTAL)
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S.Add(theButton1, 0, wx.GROW | wx.ALL, 4)
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S.Add(theButton2, 0, wx.GROW | wx.ALL, 4)
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self.SetSizerAndFit(S)
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def onButton(self, evt=None):
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print "You pushed one of the buttons!"
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class TestFrame(wx.Frame):
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def __init__(self, app_logic, *args, **kwargs):
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kwargs.setdefault('title', "Simple test App")
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wx.Frame.__init__(self, *args, **kwargs)
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self.app_logic = app_logic
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# put the Panel on the frame
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self.buttonPanel = ButtonPanel(self)
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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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openMenuItem = fileMenu.Append(wx.ID_ANY, "&Open", "Open a file" )
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self.Bind(wx.EVT_MENU, self.onOpen, openMenuItem)
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closeMenuItem = fileMenu.Append(wx.ID_ANY, "&Close", "Close a 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 onOpen(self, evt=None):
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print "open menu selected"
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self.app_logic.file_open()
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def onClose(self, evt=None):
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print "close menu selected"
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self.app_logic.file_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 TestApp(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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app_logic = AppLogic()
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f = TestFrame(app_logic, 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 = TestApp(False)
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app.MainLoop()
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‎week-09/presentation-week09.pdf

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‎week-09/presentation-week09.tex

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@@ -565,6 +565,115 @@ \section{Basic Structure}
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\end{frame}
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%-------------------------------
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\begin{frame}[fragile]{Absolute Positioning}
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{\LARGE Absolute positioning:}
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\vfill
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{\Large Specifying the size and location of controls with pixel coordinates.}
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\vfill
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{\Large This is a serious pain to do!}
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\vfill
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{\Large Though it can be made a lot easier with GUI-building tools...}
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\vfill
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{\Large So why not?}
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\end{frame}
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%-------------------------------
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\begin{frame}[fragile]{Absolute Positioning}
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{\Large When you add or remove a control, the layout changes:}\\
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{\large -- recalculate all positions and sizes}
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\vfill
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{\Large When you change the text on a control the layout changes:}\\
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{\large -- recalculate all positions and sizes}
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\vfill
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{\Large When you try it on another platform the layout changes:}\\
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{\large -- recalculate all positions and sizes}
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\vfill
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{\Large When the user changes default font size, the layout changes:}\\
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{\large -- recalculate all positions and sizes}
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\end{frame}
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%-------------------------------
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\begin{frame}[fragile]{Sizers:}
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{\Large The alternative is ``Sizers''}
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\vfill
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{\large \verb`wx.Sizer` is wx's system for automatically determining the size an location of controls}
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\vfill
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{\large Instead of thinking in terms of what size an position a given control should be, you think in terms of how they relate to each other:}
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\vfill
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{\large ``I want a column of buttons all the same size along the left edge of the Panel''}
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\vfill
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{\large Sizers capture that logic and compute the sizes for you}
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\vfill
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{\large They will re-size things for you when anything changes -- adding, removing, changing labels, re-sing the Window, etc...}
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\end{frame}
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%-------------------------------
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\begin{frame}[fragile]{Sizers:}
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{\Large Sizers take a while to wrap your brain around...}
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\vfill
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{\large but it's worth the learning curve.}
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\vfill
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{\large nice discussion here:\\
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\url{http://wiki.wxpython.org/UsingSizers} }
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\vfill
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{I have the graphic posted on the wall by my desk...}
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\end{frame}
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%-------------------------------
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\begin{frame}[fragile]{Sizer Example}
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{\Large The Basic \verb`BoxSizer`}
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\vfill
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{\large Lays out a row or column of controls...}
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\vfill
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{\Large Adding an item to a sizer:}
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{ \verb`Sizer.Add( window, proportion, flag, border )` }
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\vfill
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\begin{verbatim}
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## do the layout
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S = wx.BoxSizer(wx.VERTICAL)
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S.Add(theButton1, 0, wx.GROW | wx.ALL, 4)
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S.Add(theButton2, 0, wx.GROW | wx.ALL, 4)
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self.SetSizerAndFit(S)
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\end{verbatim}
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\vfill
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code: \verb`code\basic_app_6.py`
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\end{frame}
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%-------------------------------
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\begin{frame}[fragile]{Long Running Tasks}
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