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2007-Apr-29 13:34 UTC

[Wxruby-development] [984] branches/wxruby2/wxwidgets_282/lib/wx/classes/clientdc.rb: Prevent dangerous direct instantiation of ClientDC

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<title>[984] branches/wxruby2/wxwidgets_282/lib/wx/classes/clientdc.rb:
Prevent dangerous direct instantiation of ClientDC</title>
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<body>

<div id="msg">
<dl>
<dt>Revision</dt> <dd>984</dd>
<dt>Author</dt> <dd>brokentoy</dd>
<dt>Date</dt> <dd>2007-04-29 09:34:50 -0400 (Sun, 29 Apr
2007)</dd>
</dl>

<h3>Log Message</h3>
<pre>Prevent dangerous direct instantiation of ClientDC</pre>

<h3>Added Paths</h3>
<ul>
<li><a
href="#brancheswxruby2wxwidgets_282libwxclassesclientdcrb">branches/wxruby2/wxwidgets_282/lib/wx/classes/clientdc.rb</a></li>
</ul>

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<div id="patch">
<h3>Diff</h3>
<a
id="brancheswxruby2wxwidgets_282libwxclassesclientdcrb"></a>
<div class="addfile"><h4>Added:
branches/wxruby2/wxwidgets_282/lib/wx/classes/clientdc.rb (0 =>
984)</h4>
<pre class="diff"><span>
<span class="info">---
branches/wxruby2/wxwidgets_282/lib/wx/classes/clientdc.rb&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp
(rev 0)
+++
branches/wxruby2/wxwidgets_282/lib/wx/classes/clientdc.rb&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp2007-04-29
13:34:50 UTC (rev 984)
</span><span class="lines">@@ -0,0 +1,13 @@
</span><ins>+# Device Context to paint on a window outside an
on_paint handler. It is
+# recommended that PaintDC is used in preference to this class.
+class Wx::ClientDC
+  # This class should not be instantiated directly in wxRuby; it should
+  # always be used via Window#paint, which takes a block receiving the
+  # DC. This ensures that the DC is cleaned up at the correct time,
+  # avoiding errors and segfaults on exit.
+  def initialize(*args)
+    Kernel.raise RuntimeError,
+                 "Do not instantiate ClientDC directly; use
Window#paint",
+                 caller[1..-1]
+  end
+end
</ins></span></pre>
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