diff options
Diffstat (limited to 'doc/html/motif-walkthrough-6.html')
| -rw-r--r-- | doc/html/motif-walkthrough-6.html | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/doc/html/motif-walkthrough-6.html b/doc/html/motif-walkthrough-6.html new file mode 100644 index 000000000..802f205d5 --- /dev/null +++ b/doc/html/motif-walkthrough-6.html @@ -0,0 +1,129 @@ +<!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:776 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>Using TQt Main Window Classes</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>Using TQt Main Window Classes</h1> + + + +[ <a href="motif-walkthrough-5.html">Previous: Using Existing Dialogs with TQMotifDialog</a> ] +[ <a href="motif-walkthrough.html">Home</a> ] +[ <a href="motif-walkthrough-7.html">Next: Refactoring Existing Code</a> ] +<p> After we have replaced all the dialogs, we are ready to begin replacing +the <em>Main Window</em>. <a href="motif-walkthrough.html#4">As mentioned +above</a>, we will replace the existing <tt>XmMainWindow</tt> and +popup-menu heirarchy with <a href="application.html">TQt Main Window +Classes</a>. +<p> We will use <a href="designer-manual.html">TQt Designer</a> to design +our new main window. +<p> <h2> Implementing the <em>Main Window</em> +</h2> +<a name="1"></a><p> The description for the <em>Main Window</em> is saved as <tt>mainwindow.ui</tt>. +We add this file to the project file and regenerate the <tt>Makefile</tt>. +The <em>uic</em> utility generates the code for our <em>Main Window</em>, which +is then compiled and linked into our application. +<p> <em>TQt Designer</em> also created the <tt>mainwindow.ui.h</tt> file. We need to +add the implementation for our <em>Main Window</em> to this skeleton +implementation. +<p> We begin by adding the necessary includes for <a href="qapplication.html">TQApplication</a> +and <a href="qmotifwidget.html">TQMotifWidget</a>. +<p> + +<p> <pre></pre> +<p> We need includes for the <a href="motif-extension.html#Motif">Motif</a> callback structs and the <tt>XmdPrint</tt> +widget. +<p> <pre></pre><pre></pre> +<p> We are now ready to add implementations for the slots in our <em>Main Window</em>. We have one slot per menu item. Each slot will call the +existing callback functions found in <tt>todo.cpp</tt> and <tt>actions.cpp</tt>. +<p> <center><table cellpadding="4" cellspacing="2" border="0"> +<tr bgcolor="#a2c511"> <th valign="top" colspan="3" rowspan="1"> File menu +<tr bgcolor="#f0f0f0"> <td valign="top">New <td valign="top"><tt>MainWindow::fileNew()</tt> <td valign="top">calls the <tt>New()</tt> callback +<tr bgcolor="#d0d0d0"> <td valign="top">Open <td valign="top"><tt>MainWindow::fileOpen()</tt> <td valign="top">calls the <tt>Open()</tt> callback +<tr bgcolor="#f0f0f0"> <td valign="top">Save <td valign="top"><tt>MainWindow::fileSave()</tt> <td valign="top">calls the <tt>SaveIt()</tt> callback +<tr bgcolor="#d0d0d0"> <td valign="top">Save As <td valign="top"><tt>MainWindow::fileSaveAs()</tt> <td valign="top">calls the <tt>Save()</tt> callback +<tr bgcolor="#f0f0f0"> <td valign="top">Print <td valign="top"><tt>MainWindow::filePrint()</tt> <td valign="top">calls the <tt>ShowPrintDialog()</tt> callback +<tr bgcolor="#d0d0d0"> <td valign="top">Exit <td valign="top"><tt>MainWindow::fileExit()</tt> <td valign="top">calls <a href="qapplication.html#tquit">TQApplication::tquit</a>() +<tr bgcolor="#a2c511"> <th valign="top" colspan="3" rowspan="1"> Selected menu +<tr bgcolor="#f0f0f0"> <td valign="top">Properties <td valign="top"><tt>MainWindow::selProperties()</tt> <td valign="top">calls the <tt>EditPage()</tt> callback +<tr bgcolor="#d0d0d0"> <td valign="top">New <td valign="top"><tt>MainWindow::selNewPage()</tt> <td valign="top">calls the <tt>NewPage()</tt> callback +<tr bgcolor="#f0f0f0"> <td valign="top">Delete to Trash <td valign="top"><tt>MainWindow::selDeletePage()</tt> <td valign="top">calls the <tt>DeletePage()</tt> callback +</table></center> +<p> We need to add forward declarations for these callbacks before we can +use them. +<p> <pre></pre> +<p> Each of the existing callback functions takes three arguments. We pass +<em>NULL</em> to all of the arguments in this example (with a few exceptions, +see below). The existing code does not rely on any of the arguments. +Each slot implementation is a single line calling the related callback +function. The code is not very interesting and would just take up +space, so we've omitted it. +<p> There are four exceptions to the above. The <tt>Open()</tt>, <tt>Save()</tt>, <tt>EditPage()</tt> and <tt>DeletePage()</tt> callbacks accept a pointer to the +toplevel <a href="qwidget.html">TQWidget</a> as argument 2 (the <em>client_data</em> argument). For +these four functions, we pass <em>this</em> as the second argument, which is +a toplevel <tt>MainWindow</tt> derived from <a href="qmainwindow.html">TQMainWindow</a>. +<p> <h2> Replacing the <em>Main Window</em> +</h2> +<a name="2"></a><p> The next step is to use the new <em>Main Window</em> in our application. +The changes needed in <tt>todo.cpp</tt> are large due to the large amount of +code being removed. +<p> First, we add the include for our new <em>Main Window</em>. +<p> + +<p> <pre></pre> +<p> We can cleanup the Motif includes, since many of them are no longer +needed. +<p> <pre></pre><pre></pre><pre></pre> +<p> The <tt>QuitAppl()</tt> and <tt>manageCB()</tt> callbacks are not needed any more, +so we remove them. We do not need the global <tt>shell</tt> variable +either. We remove it and all references to it in the <tt>New()</tt>, <tt>Save()</tt> and <tt>Open()</tt> callbacks. +<p> In <tt>main()</tt>, we make the large changes. First, we use our new <tt>MainWindow</tt> instead of <a href="qmotifwidget.html">TQMotifWidget</a> with <tt>XmMainWindow</tt>. +<p> + +<p> <pre></pre> +<p> We will now use TQMotifWidget to create the <tt>XmNotebook</tt> widget. +<p> <pre></pre> +<p> We remove all of the code used to create the Motif menus. The +remaining code in <tt>main()</tt> is self-explanatory. +<p> <pre></pre> +<p> Our application is now using <a href="qmainwindow.html">TQMainWindow</a> instead of <tt>XmMainWindow</tt>. +After we build the project, the application runs and operates as +expected. +<p> [ <a href="motif-walkthrough-5.html">Previous: Using Existing Dialogs with TQMotifDialog</a> ] +[ <a href="motif-walkthrough.html">Home</a> ] +[ <a href="motif-walkthrough-7.html">Next: Refactoring Existing Code</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>TQt 3.3.8</div> +</table></div></address></body> +</html> |