Sophie: qt3-devel-3.3.8b-6ark i586

qt3-devel-3.3.8b-6ark.i586.rpm

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<title>chart/chartform_files.cpp Example File</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>chart/chartform_files.cpp Example File</h1>

 
<pre>#include "canvasview.h"
#include "chartform.h"

#include &lt;<a href="qfile-h.html">qfile.h</a>&gt;
#include &lt;<a href="qfiledialog-h.html">qfiledialog.h</a>&gt;
#include &lt;<a href="qpainter-h.html">qpainter.h</a>&gt;
#include &lt;<a href="qprinter-h.html">qprinter.h</a>&gt;
#include &lt;<a href="qstatusbar-h.html">qstatusbar.h</a>&gt;


void <a name="f172"></a>ChartForm::load( const <a href="qstring.html">QString</a>&amp; filename )
{
    <a href="qfile.html">QFile</a> file( filename );
    if ( !file.<a href="qfile.html#open">open</a>( IO_ReadOnly ) ) {
        <a href="qmainwindow.html#statusBar">statusBar</a>()-&gt;message( QString( "Failed to load \'%1\'" ).
                                arg( filename ), 2000 );
        return;
    }

    init(); // Make sure we have colours
    m_filename = filename;
    <a href="qtextstream.html">QTextStream</a> ts( &amp;file );
    Element element;
    int errors = 0;
    int i = 0;
    while ( !ts.<a href="qtextstream.html#eof">eof</a>() ) {
        ts &gt;&gt; element;
        if ( element.isValid() )
            m_elements[i++] = element;
        else
            errors++;
        if ( i == MAX_ELEMENTS ) {
            <a href="qmainwindow.html#statusBar">statusBar</a>()-&gt;message(
                QString( "Read maximum number of elements (%1)"
                         " discarding others" ).arg( i ), 2000 );
            break;
        }
    }

    file.<a href="qfile.html#close">close</a>();

    <a href="qstring.html">QString</a> bad = "";
    if ( errors ) {
        bad = QString( "; skipped " ) + QString::number( errors ) + " bad record";
        if ( errors &gt; 1 )
            bad += "s";
    }
    <a href="qmainwindow.html#statusBar">statusBar</a>()-&gt;message( QString( "Read %1 values from \'%2\'%3" ).
                          arg( i ).arg( filename ).arg( bad ), 3000 );

    <a href="qwidget.html#setCaption">setCaption</a>( QString( "Chart -- %1" ).arg( filename ) );
    updateRecentFiles( filename );

    drawElements();
    m_changed = FALSE;
}


void <a name="f173"></a>ChartForm::fileSave()
{
    if ( m_filename.isEmpty() ) {
        fileSaveAs();
        return;
    }

    <a href="qfile.html">QFile</a> file( m_filename );
    if ( !file.<a href="qfile.html#open">open</a>( IO_WriteOnly ) ) {
        <a href="qmainwindow.html#statusBar">statusBar</a>()-&gt;message( QString( "Failed to save \'%1\'" ).
                                arg( m_filename ), 2000 );
        return;
    }
    <a href="qtextstream.html">QTextStream</a> ts( &amp;file );
    for ( int i = 0; i &lt; MAX_ELEMENTS; ++i )
        if ( m_elements[i].isValid() )
            ts &lt;&lt; m_elements[i];

    file.<a href="qfile.html#close">close</a>();

    <a href="qwidget.html#setCaption">setCaption</a>( QString( "Chart -- %1" ).arg( m_filename ) );
    <a href="qmainwindow.html#statusBar">statusBar</a>()-&gt;message( QString( "Saved \'%1\'" ).arg( m_filename ), 2000 );
    m_changed = FALSE;
}


void <a name="f174"></a>ChartForm::fileSaveAsPixmap()
{
    <a href="qstring.html">QString</a> filename = QFileDialog::<a href="qfiledialog.html#getSaveFileName">getSaveFileName</a>(
                            QString::null, "Images (*.png *.xpm *.jpg)",
                            this, "file save as bitmap",
                            "Chart -- File Save As Bitmap" );
    if ( QPixmap::<a href="qpixmap.html#grabWidget">grabWidget</a>( m_canvasView ).
            save( filename,
                  filename.<a href="qstring.html#mid">mid</a>( filename.<a href="qstring.html#findRev">findRev</a>( '.' ) + 1 ).upper() ) )
        <a href="qmainwindow.html#statusBar">statusBar</a>()-&gt;message( QString( "Wrote \'%1\'" ).arg( filename ), 2000 );
    else
        <a href="qmainwindow.html#statusBar">statusBar</a>()-&gt;message( QString( "Failed to write \'%1\'" ).
                                arg( filename ), 2000 );
}

void <a name="f175"></a>ChartForm::filePrint()
{
    if ( !m_printer )
        m_printer = new <a href="qprinter.html">QPrinter</a>;
    if ( m_printer-&gt;<a href="qprinter.html#setup">setup</a>() ) {
        <a href="qpainter.html">QPainter</a> painter( m_printer );
        m_canvas-&gt;drawArea( QRect( 0, 0, m_canvas-&gt;width(), m_canvas-&gt;height() ),
                            &amp;painter, FALSE );
        if ( !m_printer-&gt;<a href="qprinter.html#outputFileName">outputFileName</a>().isEmpty() )
            <a href="qmainwindow.html#statusBar">statusBar</a>()-&gt;message( QString( "Printed \'%1\'" ).
                                  arg( m_printer-&gt;<a href="qprinter.html#outputFileName">outputFileName</a>() ), 2000 );
    }
}

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