qwerty-main-cpp.html

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    if ( code >= Codec )
        t.<a href="qtextstream.html#db3d00">setCodec</a>( codecList-&gt;at(code-Codec) );
    else if ( code == Uni )
        t.<a href="qtextstream.html#2c5ab2">setEncoding</a>( QTextStream::Unicode );
    else if ( code == MBug )
        t.<a href="qtextstream.html#2c5ab2">setEncoding</a>( QTextStream::UnicodeReverse );
    else if ( code == Lat1 )
        t.<a href="qtextstream.html#2c5ab2">setEncoding</a>( QTextStream::Latin1 );
    else if ( code == Guess ) {
        <a href="qfile.html">QFile</a> f(fileName);
        f.<a href="qfile.html#255995">open</a>(IO_ReadOnly);
        char buffer[256];
        int l = 256;
        l=f.<a href="qfile.html#8c8ccc">readBlock</a>(buffer,l);
        <a href="qtextcodec.html">QTextCodec</a>* codec = QTextCodec::codecForContent(buffer, l);
        if ( codec ) {
            <a href="qmessagebox.html#66b7c8">QMessageBox::information</a>(this,"Encoding",QString("Codec: ")+codec-&gt;<a href="qtextcodec.html#150a9d">name</a>());
            t.<a href="qtextstream.html#db3d00">setCodec</a>( codec );
        }
    }
    e-&gt;setText( t.<a href="qtextstream.html#4696a5">read</a>() );
    f.<a href="qfile.html#64e640">close</a>();

    e-&gt;setAutoUpdate( TRUE );
    e-&gt;repaint();
    <a href="qwidget.html#d6a291">setCaption</a>( fileName );

    changed = FALSE;
}

void <a name="5"></a>Editor::openAsEncoding( int code )
{
#ifndef QT_NO_FILEDIALOG
    //storing filename (proper save) is left as an exercise...
    <a href="qstring.html">QString</a> fn = QFileDialog::getOpenFileName( QString::null, QString::null, this );
    if ( !fn.<a href="qstring.html#c62623">isEmpty</a>() )
        (void) load( fn, code );
#endif
}

bool <a name="6"></a>Editor::save()
{
#ifndef QT_NO_FILEDIALOG
    //storing filename (proper save) is left as an exercise...
    <a href="qstring.html">QString</a> fn = QFileDialog::getSaveFileName( QString::null, QString::null, this );
    if ( !fn.<a href="qstring.html#c62623">isEmpty</a>() )
        return saveAs( fn );
    return FALSE;
#endif
}

void <a name="7"></a>Editor::saveAsEncoding( int code )
{
#ifndef QT_NO_FILEDIALOG
    //storing filename (proper save) is left as an exercise...
    <a href="qstring.html">QString</a> fn = QFileDialog::getSaveFileName( QString::null, QString::null, this );
    if ( !fn.<a href="qstring.html#c62623">isEmpty</a>() )
        (void) saveAs( fn, code );
#endif
}

void <a name="8"></a>Editor::addEncoding()
{
#ifndef QT_NO_FILEDIALOG    
    <a href="qstring.html">QString</a> fn = QFileDialog::getOpenFileName( QString::null, "*.map", this );
    if ( !fn.<a href="qstring.html#c62623">isEmpty</a>() ) {
        <a href="qfile.html">QFile</a> f(fn);
        if (f.<a href="qfile.html#255995">open</a>(IO_ReadOnly)) {
            if (<a href="qtextcodec.html#f4b1ee">QTextCodec::loadCharmap</a>(&amp;f)) {
                <a href=#1>rebuildCodecList</a>();
            } else {
                <a href="qmessagebox.html#63edba">QMessageBox::warning</a>(0,"Charmap error",
                    "The file did not contain a valid charmap.\n\n"
                    "A charmap file should look like this:\n"
                       "  &lt;code_set_name&gt; thename\n"
                       "  &lt;escape_char&gt; /\n"
                       "  % alias thealias\n"
                       "  CHARMAP\n"
                       "  &lt;tokenname&gt; /x12 &lt;U3456&gt;\n"
                       "  &lt;tokenname&gt; /xAB/x12 &lt;U0023&gt;\n"
                       "  ...\n"
                       "  END CHARMAP\n"
                );
            }
        }
    }
#endif
}

bool <a name="9"></a>Editor::saveAs( const QString&amp; fileName, int code )
{
    <a href="qfile.html">QFile</a> f( fileName );
    if ( no_writing || !f.<a href="qfile.html#255995">open</a>( IO_WriteOnly ) ) {
        <a href="qmessagebox.html#63edba">QMessageBox::warning</a>(this,"I/O Error",
                    <a href="qstring.html">QString</a>("The file could not be opened.\n\n")
                        +fileName);
        return FALSE;
    }
    <a href="qtextstream.html">QTextStream</a> t(&amp;f);
    if ( code &gt;= Codec )
        t.<a href="qtextstream.html#db3d00">setCodec</a>( codecList-&gt;at(code-Codec) );
    else if ( code == Uni )
        t.<a href="qtextstream.html#2c5ab2">setEncoding</a>( QTextStream::Unicode );
    else if ( code == MBug )
        t.<a href="qtextstream.html#2c5ab2">setEncoding</a>( QTextStream::UnicodeReverse );
    else if ( code == Lat1 )
        t.<a href="qtextstream.html#2c5ab2">setEncoding</a>( QTextStream::Latin1 );
    t &lt;&lt; e-&gt;text();
    f.<a href="qfile.html#64e640">close</a>();
    <a href="qwidget.html#d6a291">setCaption</a>( fileName );
    changed = FALSE;
    return TRUE;
}

void <a name="10"></a>Editor::print()
{
#ifndef QT_NO_PRINTER
    if ( printer.setup(this) ) {                // opens printer dialog
        printer.setFullPage(TRUE);              // we'll set our own margins
        <a href="qpainter.html">QPainter</a> p;
        p.<a href="qpainter.html#02ed5d">begin</a>( &amp;printer );                    // paint on printer
        p.<a href="qpainter.html#998df2">setFont</a>( e-&gt;font() );
        <a href="qfontmetrics.html">QFontMetrics</a> fm = p.<a href="qpainter.html#73b2e5">fontMetrics</a>();
        <a href="qpaintdevicemetrics.html">QPaintDeviceMetrics</a> metrics( &amp;printer ); // need width/height
                                                 // of printer surface
        const int MARGIN = metrics.<a href="qpaintdevicemetrics.html#a15e9e">logicalDpiX</a>() / 2; // half-inch margin
        int yPos        = MARGIN;               // y position for each line

        for( int i = 0 ; i &lt; e-&gt;numLines() ; i++ ) {
            if ( printer.aborted() )
                break;
            if ( yPos + fm.<a href="qfontmetrics.html#e6e380">lineSpacing</a>() &gt; metrics.<a href="qpaintdevicemetrics.html#d4fedb">height</a>() - MARGIN ) {
                // no more room on this page
                if ( !printer.newPage() )          // start new page
                    break;                           // some error
                yPos = MARGIN;                   // back to top of page
            }
            p.<a href="qpainter.html#0f088f">drawText</a>( MARGIN, yPos, metrics.<a href="qpaintdevicemetrics.html#95eb7b">width</a>() - 2*MARGIN,
                        fm.<a href="qfontmetrics.html#e6e380">lineSpacing</a>(), ExpandTabs, e-&gt;textLine( i ) );
            yPos += fm.<a href="qfontmetrics.html#e6e380">lineSpacing</a>();
        }
        p.<a href="qpainter.html#365784">end</a>();                                // send job to printer
    }
#endif
}

void <a name="11"></a>Editor::resizeEvent( <a href="qresizeevent.html">QResizeEvent</a> * )
{
    if ( e &amp;&amp; m )
        e-&gt;setGeometry( 0, m-&gt;height(), <a href="qwidget.html#2edab1">width</a>(), <a href="qwidget.html#e3c588">height</a>() - m-&gt;height() );
}

void <a name="12"></a>Editor::closeEvent( <a href="qcloseevent.html">QCloseEvent</a> *event )
{
    event-&gt;<a href="qcloseevent.html#7cf66f">accept</a>();

    if ( changed ) { // the text has been changed
        switch ( <a href="qmessagebox.html#63edba">QMessageBox::warning</a>( this, "Qwerty",
                                        "Save changes to Document?",
                                        <a href="qobject.html#2418a9">tr</a>("&amp;Yes"),
                                        <a href="qobject.html#2418a9">tr</a>("&amp;No"),
                                        <a href="qobject.html#2418a9">tr</a>("Cancel"),
                                        0, 2) ) {
        case 0: // yes
            if ( save() )
                event-&gt;<a href="qcloseevent.html#7cf66f">accept</a>();
            else
                event-&gt;<a href="qcloseevent.html#ee1736">ignore</a>();
            break;
        case 1: // no
            event-&gt;<a href="qcloseevent.html#7cf66f">accept</a>();
            break;
        default: // cancel
            event-&gt;<a href="qcloseevent.html#ee1736">ignore</a>();
            break;
        }
    }
}

void <a name="13"></a>Editor::toUpper()
{
    e-&gt;setText(e-&gt;text().upper());
}

void <a name="14"></a>Editor::toLower()
{
    e-&gt;setText(e-&gt;text().lower());
}

void <a name="15"></a>Editor::textChanged()
{
    changed = TRUE;
}
</pre>


  <hr>

  Main:
<pre>/****************************************************************************
** &#36;Id&#58; qt/examples/qwerty/main.cpp   2.3.8   edited 2004-05-12 $
**
** Copyright (C) 1992-2000 Trolltech AS.  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 &lt;<a name="qapplication.h"></a><a href="qapplication-h.html">qapplication.h</a>&gt;
#include "qwerty.h"

int main( int argc, char **argv )
{
    <a name="QApplication"></a><a href="qapplication.html">QApplication</a> a( argc, argv );

    bool small =  qApp-&gt;desktop()-&gt;size().width() &lt; 450 
                  || qApp-&gt;desktop()-&gt;size().height() &lt; 450;

    int i;
    for ( i= argc &lt;= 1 ? 0 : 1; i&lt;argc; i++ ) {
        Editor *e = new Editor;
        e-&gt;<a name="setCaption"></a><a href="qwidget.html#d6a291">setCaption</a>("Qt Example - QWERTY");
        if ( i &gt; 0 )
            e-&gt;load( argv[i] );
        if ( small ) {
            e-&gt;<a name="showMaximized"></a><a href="qwidget.html#b6e000">showMaximized</a>();
        } else {
            e-&gt;<a name="resize"></a><a href="qwidget.html#8fcbbe">resize</a>( 400, 400 );
            e-&gt;<a name="show"></a><a href="qwidget.html#200ee5">show</a>();
        }
    }
    a.<a name="connect"></a><a href="qobject.html#fbde73">connect</a>( &amp;a, SIGNAL(lastWindowClosed()), &amp;a, SLOT(quit()) );
    return a.<a name="exec"></a><a href="qapplication.html#84c7bf">exec</a>();
}
</pre>
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