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<title>An Extension Dialog Example</title>
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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>An Extension Dialog Example</h1>
<p>
<p> This example demonstrates how to create an extension dialog.
<p> Essentially all that is necessary is to create a standard dialog
and then create a <a href="qwidget.html">QWidget</a> form to be used as the extension. See
the article in <a href="http://doc.trolltech.com/qq/">Qt
Quarterly</a> issue #3.
<p> <hr>
<p> Project file:
<p> <pre>TEMPLATE = app
LANGUAGE = C++
CONFIG += qt warn_on release
REQUIRES = full-config nocrosscompiler
SOURCES += main.cpp
FORMS = mainform.ui \
dialogform.ui \
extension.ui
DBFILE = extension.db
</pre>
<p> <hr>
<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
** ui.h extension file, included from the uic-generated form implementation.
**
** If you wish to add, delete or rename functions use Qt Designer which will
** update this file, preserving your code. Create an init() function in place
** of a constructor, and a destroy() function in place of a destructor.
*****************************************************************************/
#include "dialogform.h"
#include "extension.h"
#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
#include &lt;<a href="qcheckbox-h.html">qcheckbox.h</a>&gt;
#include &lt;<a href="qlineedit-h.html">qlineedit.h</a>&gt;
void MainForm::init()
{
sessions = FALSE;
logging = FALSE;
log_filename = <a href="qstring.html#QString-null">QString::null</a>;
log_errors = TRUE;
log_actions = TRUE;
}
void MainForm::optionsDlg()
{
DialogForm *dlg = new DialogForm( this, "dialog", TRUE );
Extension *ext = (Extension*)dlg-&gt;extension()-&gt;qt_cast( "Extension" );
if ( !ext )
return;
dlg-&gt;sessionsCheckBox-&gt;setChecked( sessions );
dlg-&gt;loggingCheckBox-&gt;setChecked( logging );
ext-&gt;logfileLineEdit-&gt;setText( log_filename );
ext-&gt;logErrorsCheckBox-&gt;setChecked( log_errors );
if ( dlg-&gt;exec() ) {
sessions = dlg-&gt;sessionsCheckBox-&gt;isChecked();
logging = dlg-&gt;loggingCheckBox-&gt;isChecked();
log_filename = ext-&gt;logfileLineEdit-&gt;text();
log_errors = ext-&gt;logErrorsCheckBox-&gt;isChecked();
}
}
void MainForm::quit()
{
<a name="x2865"></a> QApplication::<a href="qapplication.html#exit">exit</a>( 0 );
}
</pre>
<pre>/****************************************************************************
** ui.h extension file, included from the uic-generated form implementation.
**
** If you wish to add, delete or rename functions use Qt Designer which will
** update this file, preserving your code. Create an init() function in place
** of a constructor, and a destroy() function in place of a destructor.
*****************************************************************************/
void DialogForm::init()
{
extensionShown = FALSE;
setExtension( new Extension( this ) );
setOrientation( Vertical );
}
void DialogForm::toggleDetails()
{
extensionShown = !extensionShown;
showExtension( extensionShown );
<a href="qstring.html">QString</a> text = tr( "&amp;Details " );
text += QString( extensionShown ? "&lt;&lt;&lt;" : "&gt;&gt;&gt;" );
detailsPushButton-&gt;setText( text );
}
</pre>
<pre>/****************************************************************************
** ui.h extension file, included from the uic-generated form implementation.
**
** If you wish to add, delete or rename functions use Qt Designer which will
** update this file, preserving your code. Create an init() function in place
** of a constructor, and a destroy() function in place of a destructor.
*****************************************************************************/
</pre>
<p> <hr>
<p> Main:
<p> <pre>#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
#include "mainform.h"
int main( int argc, char ** argv )
{
<a href="qapplication.html">QApplication</a> a( argc, argv );
MainForm *w = new MainForm;
w-&gt;show();
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return a.<a href="qapplication.html#exec">exec</a>();
}
</pre>
<p> <p>See also <a href="step-by-step-examples.html">Step-by-step Examples</a>.
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