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| 6 | <meta name="generator" content="Docutils 0.3.1: http://docutils.sourceforge.net/" /> |
| 7 | <title>Example Programs Using wxPython</title> |
| 8 | <meta name="author" content="Patrick K. O'Brien" /> |
| 9 | <meta name="organization" content="Orbtech" /> |
| 10 | <meta name="date" content="2003-07-02" /> |
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| 12 | </head> |
| 13 | <body> |
| 14 | <div class="document" id="example-programs-using-wxpython"> |
| 15 | <h1 class="title">Example Programs Using wxPython</h1> |
| 16 | <h2 class="subtitle" id="a-survival-guide-for-the-post-wx-prefixed-world">A survival guide for the post-wx-prefixed world.</h2> |
| 17 | <table class="docinfo" frame="void" rules="none"> |
| 18 | <col class="docinfo-name" /> |
| 19 | <col class="docinfo-content" /> |
| 20 | <tbody valign="top"> |
| 21 | <tr><th class="docinfo-name">Author:</th> |
| 22 | <td>Patrick K. O'Brien</td></tr> |
| 23 | <tr><th class="docinfo-name">Contact:</th> |
| 24 | <td><a class="first last reference" href="mailto:pobrien@orbtech.com">pobrien@orbtech.com</a></td></tr> |
| 25 | <tr><th class="docinfo-name">Organization:</th> |
| 26 | <td><a class="first last reference" href="http://www.orbtech.com/">Orbtech</a></td></tr> |
| 27 | <tr><th class="docinfo-name">Date:</th> |
| 28 | <td>2003-07-02</td></tr> |
| 29 | <tr><th class="docinfo-name">Revision:</th> |
| 30 | <td>1.2</td></tr> |
| 31 | </tbody> |
| 32 | </table> |
| 33 | <div class="contents topic" id="contents"> |
| 34 | <p class="topic-title"><a name="contents">Contents</a></p> |
| 35 | <ul class="simple"> |
| 36 | <li><a class="reference" href="#introduction" id="id1" name="id1">Introduction</a></li> |
| 37 | <li><a class="reference" href="#background-with-tongue-firmly-in-cheek" id="id2" name="id2">Background (with tongue firmly in cheek)</a></li> |
| 38 | <li><a class="reference" href="#basic-program-example" id="id3" name="id3">Basic Program Example</a></li> |
| 39 | <li><a class="reference" href="#hello-wxpython-example" id="id4" name="id4">Hello wxPython Example</a></li> |
| 40 | </ul> |
| 41 | </div> |
| 42 | <div class="section" id="introduction"> |
| 43 | <h1><a class="toc-backref" href="#id1" name="introduction">Introduction</a></h1> |
| 44 | <p>This document illustrates example programs using wxPython. All the |
| 45 | examples make use of the new wx package syntax introduced in wxPython |
| 46 | 2.4.1, which is a bit different than older examples you might come |
| 47 | across.</p> |
| 48 | </div> |
| 49 | <div class="section" id="background-with-tongue-firmly-in-cheek"> |
| 50 | <h1><a class="toc-backref" href="#id2" name="background-with-tongue-firmly-in-cheek">Background (with tongue firmly in cheek)</a></h1> |
| 51 | <p>If something hits you on the head, don't run around screaming that the |
| 52 | sky is falling. Instead, take a close look and see if it wasn't a |
| 53 | "wx" prefix that hit you. Apparently, they're dropping off wxPython |
| 54 | class names like flies dropping dead in the scorching heat of a |
| 55 | summer's day.</p> |
| 56 | <p>Yes, the world is changing, and even our little wxPython world must |
| 57 | change with it. Then again, I'm not fond of pesky summertime flies, |
| 58 | and I'm not too upset that the "wx" prefixes are going to bite the |
| 59 | dust. I think it's for the best. But, being the kind, considerate |
| 60 | person that I am, I decided to write this guide to make the wx |
| 61 | namespace transition easier for everyone, even Chicken Little.</p> |
| 62 | <div class="note"> |
| 63 | <p class="admonition-title">Note</p> |
| 64 | <p>Say what?</p> |
| 65 | <p>If you have no idea what I mean by the "wx namespace transition," |
| 66 | consider yourself lucky. You can simply use these examples to |
| 67 | learn wxPython in its current state (beginning with wxPython |
| 68 | version 2.4.1). All you need to know is that previous wxPython |
| 69 | code used a slightly different syntax that some folks (including |
| 70 | me) considered ugly. So we changed it. And that's when the sky |
| 71 | starting falling...</p> |
| 72 | <p>If you want more of the technical details, read the <a class="reference" href="wxPackage.html">wx package |
| 73 | documentation</a>.</p> |
| 74 | </div> |
| 75 | <p>Rather than simply <strong>tell</strong> you that everything will be okay, I |
| 76 | decided to <strong>show</strong> you that everything will be okay. To do that, |
| 77 | I've created a bunch of example programs using the new wx package. I |
| 78 | hope you like them.</p> |
| 79 | </div> |
| 80 | <div class="section" id="basic-program-example"> |
| 81 | <h1><a class="toc-backref" href="#id3" name="basic-program-example">Basic Program Example</a></h1> |
| 82 | <p>It doesn't get much simpler than this. Every wxPython program needs |
| 83 | an application and a frame. To encourage good coding habits, I've |
| 84 | split them into separate modules. They don't do much, but they're a |
| 85 | good starting point.</p> |
| 86 | <p>I include a simple App class in the frame module because the PyWrap |
| 87 | "wrapper" utility (<tt class="literal"><span class="pre">pywrap</span></tt>) only works with modules that contain an |
| 88 | application class. So including a simple one in each of your frame |
| 89 | modules allows you to use the PyWrap runtime wrapper and debug your |
| 90 | frames independent of your full application.</p> |
| 91 | <p>Here is the module (<tt class="literal"><span class="pre">frame.py</span></tt>) that defines the frame class:</p> |
| 92 | <pre class="literal-block"> |
| 93 | #!/usr/bin/env python |
| 94 | |
| 95 | """Basic frame class, with App for testing.""" |
| 96 | |
| 97 | __author__ = "Patrick K. O'Brien <pobrien@orbtech.com>" |
| 98 | __cvsid__ = "$Id$" |
| 99 | __revision__ = "$Revision$"[11:-2] |
| 100 | |
| 101 | import wx |
| 102 | |
| 103 | class Frame(wx.Frame): |
| 104 | """Frame class.""" |
| 105 | |
| 106 | def __init__(self, parent=None, id=-1, title='Title', |
| 107 | pos=wx.DefaultPosition, size=(400, 200)): |
| 108 | """Create a Frame instance.""" |
| 109 | wx.Frame.__init__(self, parent, id, title, pos, size) |
| 110 | |
| 111 | class App(wx.App): |
| 112 | """Application class.""" |
| 113 | |
| 114 | def OnInit(self): |
| 115 | self.frame = Frame() |
| 116 | self.frame.Show() |
| 117 | self.SetTopWindow(self.frame) |
| 118 | return True |
| 119 | |
| 120 | def main(): |
| 121 | app = App() |
| 122 | app.MainLoop() |
| 123 | |
| 124 | if __name__ == '__main__': |
| 125 | main() |
| 126 | |
| 127 | </pre> |
| 128 | <p>And here is the module (<tt class="literal"><span class="pre">app.py</span></tt>) that defines the application class |
| 129 | and imports the frame from <tt class="literal"><span class="pre">frame.py</span></tt>:</p> |
| 130 | <pre class="literal-block"> |
| 131 | #!/usr/bin/env python |
| 132 | |
| 133 | """Basic application class.""" |
| 134 | |
| 135 | __author__ = "Patrick K. O'Brien <pobrien@orbtech.com>" |
| 136 | __cvsid__ = "$Id$" |
| 137 | __revision__ = "$Revision$"[11:-2] |
| 138 | |
| 139 | import wx |
| 140 | |
| 141 | from frame import Frame |
| 142 | |
| 143 | class App(wx.App): |
| 144 | """Application class.""" |
| 145 | |
| 146 | def OnInit(self): |
| 147 | self.frame = Frame() |
| 148 | self.frame.Show() |
| 149 | self.SetTopWindow(self.frame) |
| 150 | return True |
| 151 | |
| 152 | def main(): |
| 153 | app = App() |
| 154 | app.MainLoop() |
| 155 | |
| 156 | if __name__ == '__main__': |
| 157 | main() |
| 158 | |
| 159 | </pre> |
| 160 | </div> |
| 161 | <div class="section" id="hello-wxpython-example"> |
| 162 | <h1><a class="toc-backref" href="#id4" name="hello-wxpython-example">Hello wxPython Example</a></h1> |
| 163 | <p>This program displays an image file (<tt class="literal"><span class="pre">wxPython.jpg</span></tt>) inside a frame |
| 164 | sized to match the graphic.</p> |
| 165 | <div class="figure"> |
| 166 | <p><img alt="screenshots/hello-win98.png" scale="100" src="screenshots/hello-win98.png" /></p> |
| 167 | <p class="caption">Running <tt class="literal"><span class="pre">hello.py</span></tt> on Windows.</p> |
| 168 | </div> |
| 169 | <div class="figure"> |
| 170 | <p><img alt="screenshots/hello-linux.png" scale="100" src="screenshots/hello-linux.png" /></p> |
| 171 | <p class="caption">Running <tt class="literal"><span class="pre">hello.py</span></tt> on Linux.</p> |
| 172 | </div> |
| 173 | <div class="figure"> |
| 174 | <p><img alt="screenshots/hello-mac.png" scale="100" src="screenshots/hello-mac.png" /></p> |
| 175 | <p class="caption">Running <tt class="literal"><span class="pre">hello.py</span></tt> on Mac OS X.</p> |
| 176 | </div> |
| 177 | <p>Here is the source code for <tt class="literal"><span class="pre">hello.py</span></tt>:</p> |
| 178 | <pre class="literal-block"> |
| 179 | #!/usr/bin/env python |
| 180 | |
| 181 | """Hello, wxPython! program.""" |
| 182 | |
| 183 | __author__ = "Patrick K. O'Brien <pobrien@orbtech.com>" |
| 184 | __cvsid__ = "$Id$" |
| 185 | __revision__ = "$Revision$"[11:-2] |
| 186 | |
| 187 | import wx |
| 188 | |
| 189 | class Frame(wx.Frame): |
| 190 | """Frame class that displays an image.""" |
| 191 | |
| 192 | def __init__(self, image, parent=None, id=-1, |
| 193 | pos=wx.DefaultPosition, title='Hello, wxPython!'): |
| 194 | """Create a Frame instance and display image.""" |
| 195 | temp = image.ConvertToBitmap() |
| 196 | size = temp.GetWidth(), temp.GetHeight() |
| 197 | wx.Frame.__init__(self, parent, id, title, pos, size) |
| 198 | self.bmp = wx.StaticBitmap(parent=self, id=-1, bitmap=temp) |
| 199 | |
| 200 | class App(wx.App): |
| 201 | """Application class.""" |
| 202 | |
| 203 | def OnInit(self): |
| 204 | wx.InitAllImageHandlers() |
| 205 | image = wx.Image('wxPython.jpg', wx.BITMAP_TYPE_JPEG) |
| 206 | self.frame = Frame(image) |
| 207 | self.frame.Show() |
| 208 | self.SetTopWindow(self.frame) |
| 209 | return True |
| 210 | |
| 211 | def main(): |
| 212 | app = App() |
| 213 | app.MainLoop() |
| 214 | |
| 215 | if __name__ == '__main__': |
| 216 | main() |
| 217 | |
| 218 | </pre> |
| 219 | </div> |
| 220 | </div> |
| 221 | <hr class="footer" /> |
| 222 | <div class="footer"> |
| 223 | Generated on: 2004-02-04 23:31 UTC. |
| 224 | </div> |
| 225 | </body> |
| 226 | </html> |