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2007-Jun-05 20:08 UTC

[Wxruby-development] [1049] trunk/wxruby2/lib/wx/classes/bitmap.rb: Raise an exception if an invalid file path is passed to Bitmap ctor

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<title>[1049] trunk/wxruby2/lib/wx/classes/bitmap.rb: Raise an exception
if an invalid file path is passed to Bitmap ctor</title>
</head>
<body>

<div id="msg">
<dl>
<dt>Revision</dt> <dd>1049</dd>
<dt>Author</dt> <dd>brokentoy</dd>
<dt>Date</dt> <dd>2007-06-05 16:08:06 -0400 (Tue, 05 Jun
2007)</dd>
</dl>

<h3>Log Message</h3>
<pre>Raise an exception if an invalid file path is passed to Bitmap
ctor</pre>

<h3>Modified Paths</h3>
<ul>
<li><a
href="#trunkwxruby2libwxclassesbitmaprb">trunk/wxruby2/lib/wx/classes/bitmap.rb</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkwxruby2libwxclassesbitmaprb"></a>
<div class="modfile"><h4>Modified:
trunk/wxruby2/lib/wx/classes/bitmap.rb (1048 => 1049)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/lib/wx/classes/bitmap.rb&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp2007-06-05
20:07:23 UTC (rev 1048)
+++
trunk/wxruby2/lib/wx/classes/bitmap.rb&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp2007-06-05
20:08:06 UTC (rev 1049)
</span><span class="lines">@@ -1,4 +1,17 @@
</span><span class="cx"> class Wx::Bitmap
</span><ins>+  # Redefine the initialize method so it raises an
exception if a
+  # non-existent file is given to the constructor; otherwise, wx Widgets
+  # just carries on with an empty bitmap, which may cause faults later
+  wx_init = self.instance_method(:initialize)
+  define_method(:initialize) do | *args |
+    if args[0].kind_of? String
+      if not File.exist?( File.expand_path(args[0]) )
+        Kernel.raise(ArgumentError, "Bitmap file does not exist:
#{args[0]}")
+      end
+    end
+    wx_init.bind(self).call(*args)
+  end
+
</ins><span class="cx">   # Accepts a block, which will be
passed a device context which can be
</span><span class="cx">   # used to draw upon the Bitmap
</span><span class="cx">   def draw
</span></span></pre>
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