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103 lines
4.5 KiB
103 lines
4.5 KiB
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<html>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Using Custom QDialogs</title>
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<font color="#004faf">Home</font></a>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Using Custom QDialogs</h1>
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[ <a href="motif-walkthrough-3.html">Previous: Using Qt Standard Dialogs</a> ]
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[ <a href="motif-walkthrough.html">Home</a> ]
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[ <a href="motif-walkthrough-5.html">Next: Using Existing Dialogs with QMotifDialog</a> ]
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<p> After we have replaced the standard dialogs, we move onto the custom
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dialogs. This project has a single custom dialog: the <em>Page Edit</em>
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dialog.
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<p> Instead of writing the code ourselves, we use <a href="designer-manual.html">Qt Designer</a> to design our dialog.
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Designing a custom dialog is beyond the scope of
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this document: see the <a href="designer-manual.html">Qt Designer Manual</a> if you're unfamiliar
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with Qt's visual design tool.
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<p> <h2> Replacing the <em>Page Edit</em> Dialog
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</h2>
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<a name="1"></a><p> The custom <a href="qdialog.html">QDialog</a> description for the <em>Page Edit</em> dialog is saved
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as <tt>pageeditdialog.ui</tt>. We add this file to the project file by
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adding the line
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<pre>
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FORMS = pageeditdialog.ui
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</pre>
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to the <tt>.pro</tt> file, and regenerate the <tt>Makefile</tt>. The <em>uic</em>
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utility generates the code for our custom QDialog, which is then
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compiled and linked into our application. (<em>uic</em> is invoked
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automatically from makefiles generated from <tt>.pro</tt> files.)
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<p> We need to pass the top-level <a href="qmotifwidget.html">QMotifWidget</a> as the <em>client_data</em>
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argument to the <tt>EditPage</tt> function, which we will use as the parent
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for our new <tt>PageEditDialog</tt>. We do this the same way as we have
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done for the <em>Open</em> and <em>Save As</em> dialogs in <tt>todo.cpp</tt>.
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<p>
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<p> <pre></pre>
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<p> The <tt>EditPage()</tt> function is implemented in <tt>actions.cpp</tt>. We start
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by adding the includes needed for the <tt>PageEditDialog</tt> and <a href="qlineedit.html">QLineEdit</a>.
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<p>
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<p> <pre></pre>
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<p> In the <tt>EditPage()</tt> function, We create the <tt>PageEditDialog</tt>, set
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the initial values of the three QLineEdit widgets with values from the
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current page and execute the dialog.
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<p> <pre></pre><pre>
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...
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</pre>
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<p> At this point in the code, the page properties should be modified. The
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code to do this is in the <tt>DoEditPage()</tt> function. We move the
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contents of <tt>DoEditPage()</tt> to this point and remove the <tt>DoEditPage()</tt> function completely.
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<p> The <tt>Page</tt> struct defined in <tt>page.h</tt> stores strings in <tt>char*</tt>
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arrays. Since the PageEditDialog and the data it contains will be
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destroyed when we return from this function, we need to convert the
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unicode <a href="qstring.html">QString</a> data into a <a href="qcstring.html">QCString</a> in the local encoding and
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duplicate it with <a href="qcstring.html#qstrdup">qstrdup</a>().
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<p> <pre></pre>
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<p> The same process must be done for the minorTab text:
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<p> <pre></pre>
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<p> ... and for the majorTab text:
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<p> <pre></pre>
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<p> [ <a href="motif-walkthrough-3.html">Previous: Using Qt Standard Dialogs</a> ]
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[ <a href="motif-walkthrough.html">Home</a> ]
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[ <a href="motif-walkthrough-5.html">Next: Using Existing Dialogs with QMotifDialog</a> ]
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<p>
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<p><address><hr><div align=center>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>Qt 3.3.8</div>
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