history_edit.shtml

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<HTML><HEAD>   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">   <META NAME="Author" CONTENT="Chris Maunder">   <TITLE>Controls - History Edit Control</TITLE></HEAD>
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<CENTER><H3><FONT COLOR="#AOAO99">History Edit Control</FONT></H3></CENTER>
<HR>
This sample was contributed by <A HREF="http://members.xoom.com/ravib">Ravi Bhavnani</A>.
<p>CHistoryEdit is a CEdit derived control that lets you to display a scrolling
text history, much like Dev Studio's "Output" window during a compilation.
Here's an example of the control (the "History" window) being used in a dialog box.

<p>
<img src="history_edit.gif" border=0 width=282 height=267 alt="CHistoryEdit demo">
<p>

CHistoryEdit's <tt><font color="#880000">AppendString()</font></tt> method appends a text
string to the control and automatically scroll the most recent entry into view.  Two other
methods, <tt><font color="#880000">AllowSelection()</font></tt> and
<tt><font color="#880000">IsSelectable()</font></tt> allow you to control whether the user
may select text in the control.

<p>
Using CHistoryEdit in a dialog is quite simple:

<ol>
  <li>  Include <tt>CHistoryEdit.h</tt> in your dialog class' header file.
        <p>
  <li>  Add member variables of type <tt>CHistoryEdit</tt> for every edit control
        you want to subclass.
        <p>
  <li>  Subclass the edit controls in your dialog's <tt>OnInitDialog()</tt> method.
        <p>
        <tt><font color="#880000">
        &nbsp;&nbsp;m_HistoryEdit.SubclassDlgItem (EDIT_HISTORY, this);
        </font></tt>
        <p>
  <li>  Append text to the control by using <tt><font color="#880000">AppendString()</font></tt>.
        <p>
        <tt><font color="#880000">
        &nbsp;&nbsp;m_HistoryEdit.AppendString ("Compiling D:\\XDA\\Test\\Mechanic.kb...");
        </font></tt>
</ol>

<p>
<a href="history_edit.zip">Download source files (2 K)</a> CHistoryEdit.cpp, CHistoryEdit.h
<br>
<a href="history_edit_demo.zip">Download demo project (14 K)</a> (includes sources)

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<p>Last updated: 11 April 1998

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