📄 button_color_picker2.shtml.htm

📁 mfc资料集合5
💻 HTM
字号:
<HTML>
<HEAD>
   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
   <META NAME="Author" CONTENT="Guy Gascoigne - Piggford">
   <TITLE>Controls - A Color Picker</TITLE>
</HEAD>
<body background="../fancyhome/back.gif" tppabs="http://www.codeguru.com/fancyhome/back.gif" bgcolor="#FFFFFF" link="#B50029" vlink="#8E2323" alink="#FF0000" bgproperties="fixed">
<table WIDTH="100%">
<tr WIDTH="100%">
<td><td>
</tr>
</table>


<CENTER>
<H3>
<FONT COLOR="#AOAO99">A Color Picker</FONT></H3></CENTER>

<CENTER>
<H3>

<HR></H3></CENTER>

<p>This article was contributed by <a href="mailto:lortega@opentech.com.ve">Luis Ortega</a></p>
<!-- start -->

<p>This color picker behaves just like the ones in the "Appearance"
tab of the Display properties dialog. Here is how the button looks
like:</p>

<p align="center"><img src="button_color_picker2.jpg" tppabs="http://www.codeguru.com/controls/button_color_picker2.jpg"></p>

<p>The picker has a "most recently used colors" feature. If you click
on the "Other" button and select a color that is not in the current
set, the least recently used color gets replaced.</p>

<p>It is very easy to use.</p>

<h4>How to include in your project</h4>

<ol>
<li>Copy ColorBtn.cpp and ColorBtn.h into your project directory.
<li>Copy ColorBtn.rc into your res directory.
<li>Add this line to your rc2 file:<br>
	#include "ColorBtn.rc"</li>
<li>Add ColorBtn.cpp to your project.
</ol>

<h4>How to use</h4>

<ol>
<li>Create a button on your dialog. Mark it as "Owner Draw".
<li>Declare a variable in your dialog class, like this:<br>
	CColorBtn colorbtn;
<li>At OnInitDialog, call SubclassDlgItem, like this:<br>
	colorbtn.SubclassDlgItem(IDC_BUTTON,this); // Use your button ID here
<li>Repeat the process for each button you want. You'll end up with as many member variables as buttons.
</ol>
<p>You can set and read the selected color using the "currentcolor" member variable.</p>


<h4>How to make your color table persistent</h4>

<p>When the buttons start up, the color table is set to the standard 20 static colors. After using them for a while, those colors might have changed. If you want to preserve the modified color table, follow one of the these procedures.</p>

<p>In a single application, all buttons share a single color table. Because of this, you don't have to do this for each button. Just use the static version of the desired function once (e.g. call CColorBtn::Load()).</p>

<p>There are two ways to make your color table persistent. Application-wise and Document-wise. </p>

<p>Application-wise means that you store the color table in the registry. This way, all documents share the same color table. CColorBtn provides two static functions to do this:</p>

<ul>
<li><strong>CColorBtn::Load()</strong><br>
Gets the colors from the registry
<li><strong>CColorBtn::Save()</strong><br>
Stores the colors in the registry
</ul>
<p>These functions require that you call SetRegistryKey() before using them.</p>

<p>Document-wise means that you store the color table in a file along
with the rest of the document data. This way, each document has its
own color table. Note that even in Document-wise fashion, all the
buttons you use in a single application share their color table (this
was at the artists' petition, I don't know, they seem to like it this
way). CColorBtn provides two functions to do this:</p>

<ul>
<li><strong>Serialize(CArchive &amp;ar)</strong><br>
Serializes the color table, you call this in your document's Serialize() function.
<li><strong>Reset()</strong><br>
Resets the color table back to the standard 20 static colors. You call this in your document's OnNewDocument() function.
</ul>


<p>Download <a href="button_color_picker2_source.zip" tppabs="http://www.codeguru.com/controls/button_color_picker2_source.zip">Source.</a></p>

<P>Posted on: April 11, 98.
<P>
<HR>
<TABLE BORDER=0 WIDTH="100%" >
<TR>
<TD WIDTH="33%"><FONT SIZE=-1><A HREF="../index.htm" tppabs="http://www.codeguru.com/">Goto HomePage</A></FONT></TD>
<TD WIDTH="33%"> <CENTER><FONT SIZE=-2>&copy; 1997 Zafir Anjum</FONT>&nbsp;</CENTER></TD>
<TD WIDTH="34%"><DIV ALIGN=right><FONT SIZE=-1>Contact me: <A HREF="mailto:zafir@home.com">zafir@home.com</A>&nbsp;</FONT></DIV></TD>
</TR>
</TABLE>
<CENTER><FONT SIZE=-2>1220</FONT></CENTER>
</BODY>
</HTML>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -