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<?xml version="1.0" encoding="iso-8859-1" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta name="generator" content="Docutils 0.2.8: http://docutils.sourceforge.net/" />
<title>Example Programs Using wxPython</title>
<meta name="author" content="Patrick K. O'Brien" />
<meta name="organization" content="Orbtech" />
<meta name="date" content="2003-05-04" />
<link rel="stylesheet" href="default.css" type="text/css" />
</head>
<body>
<div class="document" id="example-programs-using-wxpython">
<h1 class="title">Example Programs Using wxPython</h1>
<h2 class="subtitle" id="a-survival-guide-for-the-post-wx-prefixed-world">A survival guide for the post-wx-prefixed world.</h2>
<table class="docinfo" frame="void" rules="none">
<col class="docinfo-name" />
<col class="docinfo-content" />
<tbody valign="top">
<tr><th class="docinfo-name">Author:</th>
<td>Patrick K. O'Brien</td></tr>
<tr><th class="docinfo-name">Contact:</th>
<td><a class="first last reference" href="mailto:pobrien&#64;orbtech.com">pobrien&#64;orbtech.com</a></td></tr>
<tr><th class="docinfo-name">Organization:</th>
<td><a class="first last reference" href="http://www.orbtech.com/">Orbtech</a></td></tr>
<tr><th class="docinfo-name">Date:</th>
<td>2003-05-04</td></tr>
<tr><th class="docinfo-name">Revision:</th>
<td>1.1.2.2</td></tr>
</tbody>
</table>
<div class="contents topic" id="contents">
<p class="topic-title"><a name="contents">Contents</a></p>
<ul class="simple">
<li><a class="reference" href="#introduction" id="id1" name="id1">Introduction</a></li>
<li><a class="reference" href="#background-with-tongue-firmly-in-cheek" id="id2" name="id2">Background (with tongue firmly in cheek)</a></li>
<li><a class="reference" href="#basic-program-example" id="id3" name="id3">Basic Program Example</a></li>
<li><a class="reference" href="#hello-wxpython-example" id="id4" name="id4">Hello wxPython Example</a></li>
</ul>
</div>
<div class="section" id="introduction">
<h1><a class="toc-backref" href="#id1" name="introduction">Introduction</a></h1>
<p>This document illustrates example programs using wxPython. All the
examples make use of the new wx package syntax, which is a bit
different than older examples you might come across.</p>
</div>
<div class="section" id="background-with-tongue-firmly-in-cheek">
<h1><a class="toc-backref" href="#id2" name="background-with-tongue-firmly-in-cheek">Background (with tongue firmly in cheek)</a></h1>
<p>If something hits you on the head, don't run around screaming that the
sky is falling. Instead, take a close look and see if it wasn't a
&quot;wx&quot; prefix that hit you. Apparently, they're dropping off wxPython
class names like flies dropping dead in the scorching heat of a
summer's day.</p>
<p>Yes, the world is changing, and even our little wxPython world must
change with it. Then again, I'm not fond of pesky summertime flies,
and I'm not too upset that the &quot;wx&quot; prefixes are going to bite the
dust. I think it's for the best. But, being the kind, considerate
person that I am, I decided to write this guide to make the wx
namespace transition easier for everyone, even Chicken Little.</p>
<div class="note">
<p class="admonition-title">Note</p>
<p>Say what?</p>
<p>If you have no idea what I mean by the &quot;wx namespace transition,&quot;
consider yourself lucky. You can simply use these examples to
learn wxPython in its current state. All you need to know is that
previous wxPython code used a slightly different syntax that some
folks (including me) considered ugly. So we changed it. And
that's when the sky starting falling...</p>
<p>If you want more of the technical details, read the <a class="reference" href="wxPackage.html">wx package
documentation</a>.</p>
</div>
<p>Rather than simply <strong>tell</strong> you that everything will be okay, I
decided to <strong>show</strong> you that everything will be okay. To do that,
I've created a bunch of example programs using the new wx package. I
hope you like them.</p>
</div>
<div class="section" id="basic-program-example">
<h1><a class="toc-backref" href="#id3" name="basic-program-example">Basic Program Example</a></h1>
<p>It doesn't get much simpler than this. Every wxPython program needs
an application and a frame. To encourage good coding habits, I've
split them into separate modules. They don't do much, but they're a
good starting point.</p>
<p>I include a simple App class in the frame module because the PyWrap
&quot;wrapper&quot; utility (<tt class="literal"><span class="pre">pywrap</span></tt>) only works with modules that contain an
application class. So including a simple one in each of your frame
modules allows you to use the PyWrap runtime wrapper and debug your
frames independent of your full application.</p>
<p>Here is the module (<tt class="literal"><span class="pre">frame.py</span></tt>) that defines the frame class:</p>
<pre class="literal-block">
#!/usr/bin/env python
&quot;&quot;&quot;Basic frame class, with App for testing.&quot;&quot;&quot;
__author__ = &quot;Patrick K. O'Brien &lt;pobrien&#64;orbtech.com&gt;&quot;
__cvsid__ = &quot;$Id$&quot;
__revision__ = &quot;$Revision$&quot;[11:-2]
import wx
class Frame(wx.Frame):
&quot;&quot;&quot;Frame class.&quot;&quot;&quot;
def __init__(self, parent=None, id=-1, title='Title',
pos=wx.DefaultPosition, size=(400, 200)):
&quot;&quot;&quot;Create a Frame instance.&quot;&quot;&quot;
wx.Frame.__init__(self, parent, id, title, pos, size)
class App(wx.App):
&quot;&quot;&quot;Application class.&quot;&quot;&quot;
def OnInit(self):
self.frame = Frame()
self.frame.Show()
self.SetTopWindow(self.frame)
return True
def main():
app = App()
app.MainLoop()
if __name__ == '__main__':
main()
</pre>
<p>And here is the module (<tt class="literal"><span class="pre">app.py</span></tt>) that defines the application class
and imports the frame from <tt class="literal"><span class="pre">frame.py</span></tt>:</p>
<pre class="literal-block">
#!/usr/bin/env python
&quot;&quot;&quot;Basic application class.&quot;&quot;&quot;
__author__ = &quot;Patrick K. O'Brien &lt;pobrien&#64;orbtech.com&gt;&quot;
__cvsid__ = &quot;$Id$&quot;
__revision__ = &quot;$Revision$&quot;[11:-2]
import wx
from frame import Frame
class App(wx.App):
&quot;&quot;&quot;Application class.&quot;&quot;&quot;
def OnInit(self):
self.frame = Frame()
self.frame.Show()
self.SetTopWindow(self.frame)
return True
def main():
app = App()
app.MainLoop()
if __name__ == '__main__':
main()
</pre>
</div>
<div class="section" id="hello-wxpython-example">
<h1><a class="toc-backref" href="#id4" name="hello-wxpython-example">Hello wxPython Example</a></h1>
<p>This program displays an image file (<tt class="literal"><span class="pre">wxPython.jpg</span></tt>) inside a frame
sized to match the graphic.</p>
<div class="figure">
<p><img alt="screenshots/hello-win98.png" scale="100" src="screenshots/hello-win98.png" /></p>
<p class="caption">Running <tt class="literal"><span class="pre">hello.py</span></tt> on Windows.</p>
</div>
<div class="figure">
<p><img alt="screenshots/hello-linux.png" scale="100" src="screenshots/hello-linux.png" /></p>
<p class="caption">Running <tt class="literal"><span class="pre">hello.py</span></tt> on Linux.</p>
</div>
<div class="figure">
<p><img alt="screenshots/hello-mac.png" scale="100" src="screenshots/hello-mac.png" /></p>
<p class="caption">Running <tt class="literal"><span class="pre">hello.py</span></tt> on Mac OS X.</p>
</div>
<p>Here is the source code for <tt class="literal"><span class="pre">hello.py</span></tt>:</p>
<pre class="literal-block">
#!/usr/bin/env python
&quot;&quot;&quot;Hello, wxPython! program.&quot;&quot;&quot;
__author__ = &quot;Patrick K. O'Brien &lt;pobrien&#64;orbtech.com&gt;&quot;
__cvsid__ = &quot;$Id$&quot;
__revision__ = &quot;$Revision$&quot;[11:-2]
import wx
class Frame(wx.Frame):
&quot;&quot;&quot;Frame class that displays an image.&quot;&quot;&quot;
def __init__(self, image, parent=None, id=-1,
pos=wx.DefaultPosition, title='Hello, wxPython!'):
&quot;&quot;&quot;Create a Frame instance and display image.&quot;&quot;&quot;
temp = image.ConvertToBitmap()
size = temp.GetWidth(), temp.GetHeight()
wx.Frame.__init__(self, parent, id, title, pos, size)
self.bmp = wx.StaticBitmap(parent=self, id=-1, bitmap=temp)
class App(wx.App):
&quot;&quot;&quot;Application class.&quot;&quot;&quot;
def OnInit(self):
wx.InitAllImageHandlers()
image = wx.Image('wxPython.jpg', wx.BITMAP_TYPE_JPEG)
self.frame = Frame(image)
self.frame.Show()
self.SetTopWindow(self.frame)
return True
def main():
app = App()
app.MainLoop()
if __name__ == '__main__':
main()
</pre>
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