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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>A simple demonstration of QFont member functions</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>A simple demonstration of QFont member functions</h1>

 
<p> 
<p> This example demonstrates the use of various
<a href="qfont.html">QFont</a> member functions.
<p> <hr>
<p> The main window API (viewer.h):
<p> <pre>/* $Id: qt/viewer.h   3.3.8   edited May 27 2003 $ */

#ifndef VIEWER_H
#define VIEWER_H


#include &lt;<a href="qwidget-h.html">qwidget.h</a>&gt;
#include &lt;<a href="qfont-h.html">qfont.h</a>&gt;

class QTextView;
class QPushButton;

class Viewer : public <a href="qwidget.html">QWidget</a>
{
<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>

public:
    Viewer();

private slots:
    void setDefault();
    void setSansSerif();
    void setItalics();

private:
    void setFontSubstitutions();
    void layout();
    void showFontInfo( <a href="qfont.html">QFont</a> &amp; );

    <a href="qtextview.html">QTextView</a> * greetings;
    <a href="qtextview.html">QTextView</a> * fontInfo;

    <a href="qpushbutton.html">QPushButton</a> * defaultButton;
    <a href="qpushbutton.html">QPushButton</a> * sansSerifButton;
    <a href="qpushbutton.html">QPushButton</a> * italicsButton;
};

#endif
</pre>

<p> <hr>
<p> The main window implementation (viewer.cpp):
<p> <pre>/* $Id: qt/viewer.cpp   3.3.8   edited May 27 2003 $ */

#include "viewer.h"
#include &lt;<a href="qstring-h.html">qstring.h</a>&gt;
#include &lt;<a href="qstringlist-h.html">qstringlist.h</a>&gt;
#include &lt;<a href="qtextview-h.html">qtextview.h</a>&gt;
#include &lt;<a href="qpushbutton-h.html">qpushbutton.h</a>&gt;
#include &lt;<a href="qlayout-h.html">qlayout.h</a>&gt;

<a name="f590"></a>Viewer::Viewer()
       :<a href="qwidget.html">QWidget</a>()
{
    setFontSubstitutions();

<a name="x2850"></a>    <a href="qstring.html">QString</a> greeting_heb = QString::<a href="qstring.html#fromUtf8">fromUtf8</a>( "\327\251\327\234\327\225\327\235" );
    <a href="qstring.html">QString</a> greeting_ru = QString::<a href="qstring.html#fromUtf8">fromUtf8</a>( "\320\227\320\264\321\200\320\260\320\262\321\201\321\202\320\262\321\203\320\271\321\202\320\265" );
    <a href="qstring.html">QString</a> greeting_en( "Hello" );

    greetings = new <a href="qtextview.html">QTextView</a>( this, "textview" );

    greetings-&gt;<a href="qtextedit.html#setText">setText</a>( greeting_en + "\n" +
                       greeting_ru + "\n" +
                       greeting_heb );

    fontInfo = new <a href="qtextview.html">QTextView</a>( this, "fontinfo" );

    setDefault();

    defaultButton = new <a href="qpushbutton.html">QPushButton</a>( "Default", this,
                                                   "pushbutton1" );
<a name="x2860"></a>    defaultButton-&gt;<a href="qwidget.html#setFont">setFont</a>( QFont( "times" ) );
    <a href="qobject.html#connect">connect</a>( defaultButton, SIGNAL( <a href="qbutton.html#clicked">clicked</a>() ),
             this, SLOT( setDefault() ) );

    sansSerifButton = new <a href="qpushbutton.html">QPushButton</a>( "Sans Serif", this,
                                                     "pushbutton2" );
    sansSerifButton-&gt;<a href="qwidget.html#setFont">setFont</a>( QFont( "Helvetica", 12 ) );
    <a href="qobject.html#connect">connect</a>( sansSerifButton, SIGNAL( <a href="qbutton.html#clicked">clicked</a>() ),
             this, SLOT( setSansSerif() ) );

    italicsButton = new <a href="qpushbutton.html">QPushButton</a>( "Italics", this,
                                                   "pushbutton3" );
    italicsButton-&gt;<a href="qwidget.html#setFont">setFont</a>( QFont( "lucida", 12, QFont::Bold, TRUE ) );
    <a href="qobject.html#connect">connect</a>( italicsButton, SIGNAL( <a href="qbutton.html#clicked">clicked</a>() ),
             this, SLOT( setItalics() ) );

    <a href="qwidget.html#layout">layout</a>();
}

void <a name="f591"></a>Viewer::setDefault()
{
    <a href="qfont.html">QFont</a> font( "Bavaria" );
<a name="x2843"></a>    font.<a href="qfont.html#setPointSize">setPointSize</a>( 24 );

<a name="x2846"></a>    font.<a href="qfont.html#setWeight">setWeight</a>( QFont::Bold );
<a name="x2845"></a>    font.<a href="qfont.html#setUnderline">setUnderline</a>( TRUE );

    greetings-&gt;<a href="qwidget.html#setFont">setFont</a>( font );

    showFontInfo( font );
}

void <a name="f592"></a>Viewer::setSansSerif()
{
    <a href="qfont.html">QFont</a> font( "Newyork", 18 );
<a name="x2844"></a>    font.<a href="qfont.html#setStyleHint">setStyleHint</a>( QFont::SansSerif );
    greetings-&gt;<a href="qwidget.html#setFont">setFont</a>( font );

    showFontInfo( font );
}

void <a name="f593"></a>Viewer::setItalics()
{
    <a href="qfont.html">QFont</a> font( "Tokyo" );
    font.<a href="qfont.html#setPointSize">setPointSize</a>( 32 );
    font.<a href="qfont.html#setWeight">setWeight</a>( QFont::Bold );
<a name="x2842"></a>    font.<a href="qfont.html#setItalic">setItalic</a>( TRUE );

    greetings-&gt;<a href="qwidget.html#setFont">setFont</a>( font );

    showFontInfo( font );
}

void <a name="f594"></a>Viewer::showFontInfo( <a href="qfont.html">QFont</a> &amp; font )
{
    <a href="qfontinfo.html">QFontInfo</a> info( font );

    <a href="qstring.html">QString</a> messageText;
    messageText = "Font requested: \"" +
<a name="x2838"></a>                  font.<a href="qfont.html#family">family</a>() + "\" " +
<a name="x2851"></a><a name="x2841"></a>                  QString::<a href="qstring.html#number">number</a>( font.<a href="qfont.html#pointSize">pointSize</a>() ) + "pt&lt;BR&gt;" +
                  "Font used: \"" +
<a name="x2848"></a>                  info.<a href="qfontinfo.html#family">family</a>() + "\" " +
<a name="x2849"></a>                  QString::<a href="qstring.html#number">number</a>( info.<a href="qfontinfo.html#pointSize">pointSize</a>() ) + "pt&lt;P&gt;";

<a name="x2847"></a>    <a href="qstringlist.html">QStringList</a> substitutions = QFont::<a href="qfont.html#substitutes">substitutes</a>( font.<a href="qfont.html#family">family</a>() );

<a name="x2856"></a>    if ( ! substitutions.<a href="qvaluelist.html#isEmpty">isEmpty</a>() ){
        messageText += "The following substitutions exist for " + \
                       font.<a href="qfont.html#family">family</a>() + ":&lt;UL&gt;";

        QStringList::Iterator i = substitutions.<a href="qvaluelist.html#begin">begin</a>();
        while ( i != substitutions.<a href="qvaluelist.html#end">end</a>() ){
            messageText += "&lt;LI&gt;\"" + (* i) + "\"";
            i++;
        }
         messageText += "&lt;/UL&gt;";
    } else {
        messageText += "No substitutions exist for " + \
                       font.<a href="qfont.html#family">family</a>() + ".";
    }

    fontInfo-&gt;<a href="qtextedit.html#setText">setText</a>( messageText );
}

void <a name="f595"></a>Viewer::setFontSubstitutions()
{
    <a href="qstringlist.html">QStringList</a> substitutes;
<a name="x2853"></a>    substitutes.<a href="qvaluelist.html#append">append</a>( "Times" );
    substitutes +=  "Mincho",
    substitutes &lt;&lt; "Arabic Newspaper" &lt;&lt; "crox";

<a name="x2840"></a>    QFont::<a href="qfont.html#insertSubstitutions">insertSubstitutions</a>( "Bavaria", substitutes );

<a name="x2839"></a>    QFont::<a href="qfont.html#insertSubstitution">insertSubstitution</a>( "Tokyo", "Lucida" );
}


// For those who prefer to use Qt Designer for creating GUIs
// the following function might not be of particular interest:
// all it does is creating the widget layout.

<a name="x2858"></a>void Viewer::<a href="qwidget.html#layout">layout</a>()
{
    <a href="qhboxlayout.html">QHBoxLayout</a> * textViewContainer = new <a href="qhboxlayout.html">QHBoxLayout</a>();
    textViewContainer-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>( greetings );
    textViewContainer-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>( fontInfo );

    <a href="qhboxlayout.html">QHBoxLayout</a> * buttonContainer = new <a href="qhboxlayout.html">QHBoxLayout</a>();

    buttonContainer-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>( defaultButton );
    buttonContainer-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>( sansSerifButton );
    buttonContainer-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>( italicsButton );

<a name="x2857"></a>    int maxButtonHeight = defaultButton-&gt;<a href="qwidget.html#height">height</a>();

    if ( sansSerifButton-&gt;<a href="qwidget.html#height">height</a>() &gt; maxButtonHeight )
        maxButtonHeight = sansSerifButton-&gt;<a href="qwidget.html#height">height</a>();
    if ( italicsButton-&gt;<a href="qwidget.html#height">height</a>() &gt; maxButtonHeight )
        maxButtonHeight = italicsButton-&gt;<a href="qwidget.html#height">height</a>();

<a name="x2859"></a>    defaultButton-&gt;<a href="qwidget.html#setFixedHeight">setFixedHeight</a>( maxButtonHeight );
    sansSerifButton-&gt;<a href="qwidget.html#setFixedHeight">setFixedHeight</a>( maxButtonHeight );
    italicsButton-&gt;<a href="qwidget.html#setFixedHeight">setFixedHeight</a>( maxButtonHeight );

    <a href="qvboxlayout.html">QVBoxLayout</a> * container = new <a href="qvboxlayout.html">QVBoxLayout</a>( this );
<a name="x2835"></a>    container-&gt;<a href="qboxlayout.html#addLayout">addLayout</a>( textViewContainer );
    container-&gt;<a href="qboxlayout.html#addLayout">addLayout</a>( buttonContainer );

    <a href="qwidget.html#resize">resize</a>( 700, 250 );
}
</pre>

<p> <hr>
<p> main() program (simple-qfont-demo.cpp):
<p> <pre>/* $Id: qt/simple-qfont-demo.cpp   3.3.8   edited May 27 2003 $ */

#include "viewer.h"

#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;

int main( int argc, char **argv )
{
    <a href="qapplication.html">QApplication</a> app( argc, argv );
    Viewer * textViewer = new Viewer();
    textViewer-&gt;<a href="qwidget.html#setCaption">setCaption</a>( "Qt Example - Simple QFont Demo" );
    app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( textViewer );
    textViewer-&gt;<a href="qwidget.html#show">show</a>();
    return app.<a href="qapplication.html#exec">exec</a>();
}
</pre>

<p> <p>See also <a href="qfont-examples.html">QFont Examples</a>.

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