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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 <<a href="qfile-h.html">qfile.h</a>>
#include <<a href="qfiledialog-h.html">qfiledialog.h</a>>
#include <<a href="qpainter-h.html">qpainter.h</a>>
#include <<a href="qprinter-h.html">qprinter.h</a>>
#include <<a href="qstatusbar-h.html">qstatusbar.h</a>>
void <a name="f172"></a>ChartForm::load( const <a href="qstring.html">QString</a>& 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>()->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( &file );
Element element;
int errors = 0;
int i = 0;
while ( !ts.<a href="qtextstream.html#eof">eof</a>() ) {
ts >> element;
if ( element.isValid() )
m_elements[i++] = element;
else
errors++;
if ( i == MAX_ELEMENTS ) {
<a href="qmainwindow.html#statusBar">statusBar</a>()->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 > 1 )
bad += "s";
}
<a href="qmainwindow.html#statusBar">statusBar</a>()->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>()->message( QString( "Failed to save \'%1\'" ).
arg( m_filename ), 2000 );
return;
}
<a href="qtextstream.html">QTextStream</a> ts( &file );
for ( int i = 0; i < MAX_ELEMENTS; ++i )
if ( m_elements[i].isValid() )
ts << 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>()->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>()->message( QString( "Wrote \'%1\'" ).arg( filename ), 2000 );
else
<a href="qmainwindow.html#statusBar">statusBar</a>()->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-><a href="qprinter.html#setup">setup</a>() ) {
<a href="qpainter.html">QPainter</a> painter( m_printer );
m_canvas->drawArea( QRect( 0, 0, m_canvas->width(), m_canvas->height() ),
&painter, FALSE );
if ( !m_printer-><a href="qprinter.html#outputFileName">outputFileName</a>().isEmpty() )
<a href="qmainwindow.html#statusBar">statusBar</a>()->message( QString( "Printed \'%1\'" ).
arg( m_printer-><a href="qprinter.html#outputFileName">outputFileName</a>() ), 2000 );
}
}
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