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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();
<a name="x2868"></a><a name="x2867"></a>    a.<a href="qobject.html#connect">connect</a>( &amp;a, SIGNAL( <a href="qapplication.html#lastWindowClosed">lastWindowClosed</a>() ), w, SLOT( quit() ) );
    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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