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2007-Jul-19 22:28 UTC

[Wxruby-development] [1120] trunk/wxruby2/lib/wx/classes/previewframe.rb: GC protection for Preview associated with PreviewFrame, fixing crashes

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<title>[1120] trunk/wxruby2/lib/wx/classes/previewframe.rb: GC protection
for Preview associated with PreviewFrame, fixing crashes</title>
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<body>

<div id="msg">
<dl>
<dt>Revision</dt> <dd>1120</dd>
<dt>Author</dt> <dd>brokentoy</dd>
<dt>Date</dt> <dd>2007-07-19 18:28:56 -0400 (Thu, 19 Jul
2007)</dd>
</dl>

<h3>Log Message</h3>
<pre>GC protection for Preview associated with PreviewFrame, fixing
crashes
in printing.rb</pre>

<h3>Added Paths</h3>
<ul>
<li><a
href="#trunkwxruby2libwxclassespreviewframerb">trunk/wxruby2/lib/wx/classes/previewframe.rb</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkwxruby2libwxclassespreviewframerb"></a>
<div class="addfile"><h4>Added:
trunk/wxruby2/lib/wx/classes/previewframe.rb (0 => 1120)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/lib/wx/classes/previewframe.rb&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp
(rev 0)
+++
trunk/wxruby2/lib/wx/classes/previewframe.rb&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp2007-07-19
22:28:56 UTC (rev 1120)
</span><span class="lines">@@ -0,0 +1,13 @@
</span><ins>+# Frame that displays a print preview
+class Wx::PreviewFrame
+  # a PreviewFrame has a preview associated with it that must be
+  # protected from Ruby''s GC. However, there is no C++ method to
access
+  # the Wx::PrintPreview (only a protected member), so instead we have
+  # to assign it to an instance variable so it is marked correctly when
+  # the frame displaying it is marked.
+  wx_init = self.instance_method(:initialize)
+  define_method(:initialize) do | *args |
+    wx_init.bind(self).call(*args)
+    @__preview = args[0]
+  end
+end
</ins></span></pre>
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