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<title>Splitter Window - General Purpose Splitter Class</title>
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<h3 align="center"><font color="#AOAO99">General Purpose Splitter Class</font></h3>
<hr align="center">
<p>This article was contributed by <a href="mailto:yurongl@context.co.uk">Yurong Lin</a>.</p>
<p> </p>
<p>I have seen many programmers asking how to create a splitter window in a dialog box.
Unfortunately MFC does not provide a splitter control that can be directly embedded into a
dialog box. CSplitterWnd is somehow designed to be used only inside a frame window. I have
also seen a few attempts, but none is generic and easy to use.</p>
<p>The class I am presenting is designed for general purpose. The name is CSplitterBar,
the function is to provide a splitter bar that can be embedded into any kind of windows,
such as a frame, a view or a dialog box. </p>
<p>The example I am giving here is to create a CSplitterbar control in a dialog box. If
you would like to use CSplitterBar in other kinds of windows, the procedure described here
can be easily adapted.
<ol>
<li>Firstly, declare an object of CSplitterBar in your dialog class:</li>
</ol>
<p><font face="Courier New" size="2" color="#800000">CSplitterBar m_wndSplitterBar;</font></p>
<p>2. Secondly, create the m_wndSplitterBar object in the InitDialog function:</p>
<p><font color="#800000"> </font><font face="Courier New" size="2"></p>
<p><font color="#800000">//Create a splitter bar</font></p>
<blockquote>
<blockquote>
<p><font color="#800000">CRect rect(0,0,0,0);</font></p>
<p></font><font face="Courier New" size="2" color="#800000">m_wndSplitterBar.Create(WS_CHILD|WS_BORDER|WS_DLGFRAME|WS_VISIBLE,</font><font
color="#800000"> rect,this,999);</font><font face="Courier New" size="2"></p>
</font><p> </p>
</blockquote>
</blockquote>
<p>3. Finally, setup the windows on the left pane and right pane of the splitter bar:</p>
<blockquote>
<blockquote>
<font face="Courier New" size="2"><p><font color="#800000">//Insert the splitter bar
between a tree and a list control</font></p>
</blockquote>
</blockquote>
<p><font color="#800000">m_wndSplitterBar.SetPanes(&m_wndTree,&m_wndList);</font></font></p>
<p> </p>
<p>That is all your need to do, and let the CSplitterBar handle all of the rest. The full
source code can be downloaded from here:</p>
<p>To use CSplitterBar in your own project, you only need to include two files:
SplitterBar.h and SplitterBar.cpp.</p>
<p>Note:</p>
<p>There is also a message "WM_SPLITTER_MOVED" is generated by the splitter bar
whenever the control is dragged then dropped. If you want to do something special when the
splitter is repositioned, then provide a message handler for this message.</p>
<p>Download Documentation and Source <a href="simple_splitter.zip">simple_splitter.zip</a>
(48.5k)</p>
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