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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/motif-walkthrough.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
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diff --git a/doc/html/motif-walkthrough.html b/doc/html/motif-walkthrough.html new file mode 100644 index 0000000..61699c8 --- /dev/null +++ b/doc/html/motif-walkthrough.html @@ -0,0 +1,150 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/extensions/motif/doc/walkthrough.doc:2 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>Qt Motif Extension - A Migration Walkthrough</title> +<style type="text/css"><!-- +fn { margin-left: 1cm; text-indent: -1cm; } +a:link { color: #004faf; text-decoration: none } +a:visited { color: #672967; text-decoration: none } +body { background: #ffffff; color: black; } +--></style> +</head> +<body> + +<table border="0" cellpadding="0" cellspacing="0" width="100%"> +<tr bgcolor="#E5E5E5"> +<td valign=center> + <a href="index.html"> +<font color="#004faf">Home</font></a> + | <a href="classes.html"> +<font color="#004faf">All Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped Classes</font></a> + | <a href="functions.html"> +<font color="#004faf">Functions</font></a> +</td> +<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Qt Motif Extension - A Migration Walkthrough</h1> + + + +[ <a href="motif-walkthrough-1.html">Next: Getting Started</a> ] +<p> This walkthrough covers a complete migration of a <a href="motif-extension.html#Motif">Motif</a> based program +to the Qt toolkit using the <em>Qt Motif Extension</em>. +<p> It is rarely practical for a large project with hundreds of thousands +or even millions of lines of code to be migrated all at once; such an +endeavor would require too many development resources and would incur +significant risks. Every line of code would have to be rewritten, +every user interface redesigned, and quality assurance tests and +procedures all rewritten. The <em>Qt Motif Extension</em> provides a +complete and working solution for incremental migration that can be +paced to suit each individual project and the available resources. The +user interface and related code can be migrated in steps while the +rest of the project need not be changed at all. +<p> This walkthrough is intended for programmers who will be migrating an +existing Motif based project to the Qt toolkit. We assume that they +have experience with C/C++ and Xt/Motif. Some experience with the Qt +toolkit is also necessary. For developers completely new to Qt we +recommend following the learning plan outlined in <a href="how-to-learn-qt.html">How to Learn Qt</a>; or to go on a Qt +training course. (See <a href="http://www.trolltech.com">http://www.trolltech.com</a> for +details of training courses.) +<p> <h2> Goals for the Walkthrough +</h2> +<a name="1"></a><p> The goal of this walkthrough is to provide the reader with enough +knowledge to migrate Motif applications to the Qt toolkit. We will do +this by example: We will convert a real-world Motif based program +step-by-step. This walkthrough will discuss both techniques and their +rationales throughout the process. This walkthrough is broken down +into individual chapters which cover a specific topic: +<p> <ul> +<li> Chapter 1: <a href="motif-walkthrough-1.html">Getting Started</a> +<li> Chapter 2: <a href="motif-walkthrough-2.html">Preparing to Migrate the User Interface</a> +<li> Chapter 3: <a href="motif-walkthrough-3.html">Using Qt Standard Dialogs</a> +<li> Chapter 4: <a href="motif-walkthrough-4.html">Using Custom QDialogs</a> +<li> Chapter 5: <a href="motif-walkthrough-5.html">Using Existing Dialogs with QMotifDialog</a> +<li> Chapter 6: <a href="motif-walkthrough-6.html">Using Qt Main Window Classes</a> +<li> Chapter 7: <a href="motif-walkthrough-7.html">Refactoring Existing Code</a> +<li> Chapter 8: <a href="motif-walkthrough-8.html">Replacing the View Widget</a> +<li> Chapter 9: <a href="motif-walkthrough-9.html">Replacing the Print Dialog</a> +<li> Chapter 10: <a href="motif-walkthrough-10.html">Continuing Development</a> +</ul> +<p> We will use the <em>todo</em> demo program included with the Motif 2.x +distribution as our migration project. This walkthrough contains +references to the source code, which is included in the <tt>extensions/motif/examples/walkthrough</tt> subdirectory. +<p> <h2> Prerequisites +</h2> +<a name="2"></a><p> Before we can start using the <em>Qt Motif Extension</em>, we must satisfy +these requirements: +<p> <ol type=1> +<li> We are using the X11R6.x and Motif 2.x libraries. +<li> The project is compilable by a C++ compiler. +<li> We have built and installed the <em>Qt Motif Extension</em>. +<li> We have built and linked the project with the Qt toolkit and the <em>Qt Motif Extension</em> +</ol> +<p> <h3> X11R6.x and Motif 2.x Libraries +</h3> +<a name="2-1"></a><p> The mechanisms used by the <em>Qt Motif Extension</em> require development +headers and libraries from the X11R6 release and the Motif 2.0 +release. Newer versions of these can also be used. +<p> <h3> C++ Compiler +</h3> +<a name="2-2"></a><p> Since Qt is a C++ toolkit, all new code will be written in C++. In +order for existing code to coexist with new code, a C++ compiler must +be able to compile the existing code. +<p> It is possible to keep existing code and new code separate, and only +convert or rewrite existing code as needed. This is a normal part +of the migration process, and does not need to be done before the +migration process begins. This is the most common scenario, and we +will demonstrate it by migrating existing C code to C++ as needed in +this walkthrough. +<p> <h3> Build and Install the Qt Motif Extension +</h3> +<a name="2-3"></a><p> The <em>Qt Motif Extension</em> is not built and installed along with the +Qt toolkit. The extension resides in the <tt>extensions/motif</tt> +subdirectory. Run <em>make</em> in this directory to build the extension +and the examples. Once the extension has been built, run <em>make install</em>. +<p> <pre> + $ cd extensions/motif + $ make + $ make install +</pre> + +<p> The <em>Qt Motif Extension</em> is now installed and ready to use. +<p> <h3> Build and Link the Project with the Qt Toolkit and the Qt Motif Extension +</h3> +<a name="2-4"></a><p> For simplicity, we use <em>qmake</em> to create the <tt>Makefile</tt>. The <tt>-project</tt> option causes <em>qmake</em> to automatically generate a project +file. After <em>qmake -project</em> has generated our project file, we +run <em>qmake</em> again to generate a <tt>Makefile</tt>. Now, we can just run <em>make</em> to build our project. +<p> <pre> + $ qmake -project + $ qmake + $ make +</pre> + +<p> Everything builds correctly, but fails to link because we don't link +with the Motif library. We tell <em>qmake</em> to do this by adding the <tt>-lXm</tt> to the <tt>LIBS</tt> variable in our project file. Since we are +planning to use the <em>Qt Motif Extension</em> in this project as well, +we should also add <tt>-lqmotif</tt> to the list of libraries. +<p> <pre> + LIBS += -lXm -lqmotif +</pre> + +<p> Now we regenerate our <tt>Makefile</tt> by running <tt>qmake</tt> again, and +rebuild using <tt>make</tt>. This time, our project successfully links, and +the application runs as expected. +<p> We are now ready to start using the <em>Qt Motif Extension</em>. +<p> [ <a href="motif-walkthrough-1.html">Next: Getting Started</a> ] +<p> +<!-- eof --> +<p><address><hr><div align=center> +<table width=100% cellspacing=0 border=0><tr> +<td>Copyright © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>Qt 3.3.8</div> +</table></div></address></body> +</html> |