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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>Richtext</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>Richtext</h1>
<p>
In this example we demonstrate how to display rich text
in a widget. To do this some sayings taken from the famous
Unix "fortune" are displayed nicely formatted.
<p> <hr>
<p> Header file:
<p> <pre>/****************************************************************************
** $Id: qt/richtext.h 3.3.8 edited Jan 11 14:37 $
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#ifndef RICHTEXT_H
#define RICHTEXT_H
#include <<a href="qvbox-h.html">qvbox.h</a>>
class QTextView;
class QPushButton;
class MyRichText : public <a href="qvbox.html">QVBox</a>
{
<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
public:
MyRichText( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0 );
protected:
<a href="qtextview.html">QTextView</a> *view;
<a href="qpushbutton.html">QPushButton</a> *bClose, *bNext, *bPrev;
int num;
protected slots:
void prev();
void next();
};
#endif
</pre>
<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
** $Id: qt/richtext.cpp 3.3.8 edited Jan 11 14:37 $
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include "richtext.h"
#include <<a href="qhbox-h.html">qhbox.h</a>>
#include <<a href="qhbox-h.html">qhbox.h</a>>
#include <<a href="qpushbutton-h.html">qpushbutton.h</a>>
#include <<a href="qtextview-h.html">qtextview.h</a>>
#include <<a href="qbrush-h.html">qbrush.h</a>>
#include <<a href="qapplication-h.html">qapplication.h</a>>
static const char* sayings[] = {
"<b>Saying 1:</b><br>"
"<hr><br><br>"
"<big>Evil is that which one believes of others. It is a sin to believe evil "
"of others, but it is seldom a mistake.</big><br><br>"
"<center><i>-- H.L. Mencken</i></center>",
"<b>Saying 2:</b><br>"
"<hr><br><br>"
"<big>A well-used door needs no oil on its hinges.<br>"
"A swift-flowing steam does not grow stagnant.<br>"
"Neither sound nor thoughts can travel through a vacuum.<br>"
"Software rots if not used.<br><br>"
"These are great mysteries.</big><br><br>"
"<center><i>-- Geoffrey James, \"The Tao of Programming\"</i></center>",
"<b>Saying 3:</b><br>"
"<hr><br><br>"
"<big>Show business is just like high school, except you get paid.</big><br><br>"
"<center><i>-- Martin Mull</i></center>",
"<b>Saying 4:</b><br>"
"<hr><br><br>"
"<big><b>The Least Successful Executions</b><br>"
"<twocolumn><p> History has furnished us with two executioners worthy of attention. "
"The first performed in Sydney in Australia. In 1803 three attempts were "
"made to hang a Mr. Joseph Samuels. On the first two of these the rope "
"snapped, while on the third Mr. Samuels just hung there peacefully until he "
"and everyone else got bored. Since he had proved unsusceptible to capital "
"punishment, he was reprieved.</p>"
"<p> The most important British executioner was Mr. James Berry who "
"tried three times in 1885 to hang Mr. John Lee at Exeter Jail, but on each "
"occasion failed to get the trap door open.<!p>"
"<p> In recognition of this achievement, the Home Secretary commuted "
"Lee's sentence to \"life\" imprisonment. He was released in 1917, emigrated "
"to America and lived until 1933.</p></twocolumn></big><br><br>"
"<center><i>-- Stephen Pile, \"The Book of Heroic Failures\"</i></center>",
"<b>Saying 5:</b><br>"
"<hr><br><br>"
"<big>If you can, help others. If you can't, at least don't hurt others.</big><br><br>"
"<center><i>-- the Dalai Lama</i></center>",
"<b>Saying 6:</b><br>"
"<hr><br><br>"
"<big>Television has brought back murder into the home -- where it belongs.</big><br><br>"
"<center><i>-- Alfred Hitchcock</i></center>",
"<b>Saying 7:</b><br>"
"<hr><br><br>"
"<big>I don't know who my grandfather was; I am much more concerned to know "
"what his grandson will be.</big><br><br>"
"<center><i>-- Abraham Lincoln</i></center>",
0
};
<a name="f255"></a>MyRichText::MyRichText( <a href="qwidget.html">QWidget</a> *parent, const char *name )
: <a href="qvbox.html">QVBox</a>( parent, name )
{
<a href="qframe.html#setMargin">setMargin</a>( 5 );
view = new <a href="qtextview.html">QTextView</a>( this );
<a name="x465"></a> view-><a href="qtextedit.html#setText">setText</a>( "This is a <b>Test</b> with <i>italic</i> <u>stuff</u>" );
<a href="qbrush.html">QBrush</a> paper;
<a name="x461"></a> paper.<a href="qbrush.html#setPixmap">setPixmap</a>( QPixmap( "../richtext/marble.png" ) );
<a name="x460"></a> if ( paper.<a href="qbrush.html#pixmap">pixmap</a>() != 0 )
<a name="x464"></a> view-><a href="qtextedit.html#setPaper">setPaper</a>( paper );
else
view-><a href="qtextedit.html#setPaper">setPaper</a>( white );
view-><a href="qtextedit.html#setText">setText</a>( sayings[0] );
<a name="x467"></a> view-><a href="qwidget.html#setMinimumSize">setMinimumSize</a>( 450, 250 );
<a href="qhbox.html">QHBox</a> *buttons = new <a href="qhbox.html">QHBox</a>( this );
buttons-><a href="qframe.html#setMargin">setMargin</a>( 5 );
bClose = new <a href="qpushbutton.html">QPushButton</a>( "&Close", buttons );
bPrev = new <a href="qpushbutton.html">QPushButton</a>( "<< &Prev", buttons );
bNext = new <a href="qpushbutton.html">QPushButton</a>( "&Next >>", buttons );
<a name="x466"></a> bPrev-><a href="qwidget.html#setEnabled">setEnabled</a>( FALSE );
<a name="x462"></a> <a href="qobject.html#connect">connect</a>( bClose, SIGNAL( <a href="qbutton.html#clicked">clicked</a>() ), qApp, SLOT( <a href="qapplication.html#quit">quit</a>() ) );
<a href="qobject.html#connect">connect</a>( bPrev, SIGNAL( <a href="qbutton.html#clicked">clicked</a>() ), this, SLOT( prev() ) );
<a href="qobject.html#connect">connect</a>( bNext, SIGNAL( <a href="qbutton.html#clicked">clicked</a>() ), this, SLOT( next() ) );
num = 0;
}
void <a name="f256"></a>MyRichText::prev()
{
if ( num <= 0 )
return;
num--;
view-><a href="qtextedit.html#setText">setText</a>( sayings[num] );
if ( num == 0 )
bPrev-><a href="qwidget.html#setEnabled">setEnabled</a>( FALSE );
bNext-><a href="qwidget.html#setEnabled">setEnabled</a>( TRUE );
}
void <a name="f257"></a>MyRichText::next()
{
if ( !sayings[++num] )
return;
view-><a href="qtextedit.html#setText">setText</a>( sayings[num] );
if ( !sayings[num + 1] )
bNext-><a href="qwidget.html#setEnabled">setEnabled</a>( FALSE );
bPrev-><a href="qwidget.html#setEnabled">setEnabled</a>( TRUE );
}
</pre>
<p> <hr>
<p> Main:
<p> <pre>/****************************************************************************
** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:37 $
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include "richtext.h"
#include <<a href="qapplication-h.html">qapplication.h</a>>
int main( int argc, char **argv )
{
<a href="qapplication.html">QApplication</a> a( argc, argv );
MyRichText richtext;
richtext.<a href="qwidget.html#resize">resize</a>( 450, 350 );
richtext.<a href="qwidget.html#setCaption">setCaption</a>( "Qt Example - Richtext" );
a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &richtext );
richtext.<a href="qwidget.html#show">show</a>();
return a.<a href="qapplication.html#exec">exec</a>();
}
</pre>
<p>See also <a href="examples.html">Examples</a>.
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