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#include <qfiledialog.h>
#include <qwt_plot_svgitem.h>
#include <qwt_plot_grid.h>
#include <qwt_plot_layout.h>
#include <qwt_plot_canvas.h>
#include <qwt_plot_panner.h>
#include <qwt_plot_magnifier.h>
#include "plot.h"
Plot::Plot( QWidget *parent ):
QwtPlot( parent ),
d_mapItem( NULL ),
d_mapRect( 0.0, 0.0, 100.0, 100.0 ) // something
{
#if 1
/*
d_mapRect is only a reference for zooming, but
the ranges are nothing useful for the user. So we
hide the axes.
*/
plotLayout()->setCanvasMargin( 0 );
for ( int axis = 0; axis < QwtPlot::axisCnt; axis++ )
enableAxis( axis, false );
#else
QwtPlotGrid *grid = new QwtPlotGrid();
grid->attach( this );
#endif
/*
Navigation:
Left Mouse Button: Panning
Mouse Wheel: Zooming In/Out
Right Mouse Button: Reset to initial
*/
( void )new QwtPlotPanner( canvas() );
( void )new QwtPlotMagnifier( canvas() );
canvas()->setFocusPolicy( Qt::WheelFocus );
rescale();
}
#ifndef QT_NO_FILEDIALOG
void Plot::loadSVG()
{
QString dir;
const QString fileName = QFileDialog::getOpenFileName( NULL,
"Load a Scaleable Vector Graphic (SVG) Map",
dir, "SVG Files (*.svg)" );
if ( !fileName.isEmpty() )
loadSVG( fileName );
}
#endif
void Plot::loadSVG( const QString &fileName )
{
if ( d_mapItem == NULL )
{
d_mapItem = new QwtPlotSvgItem();
d_mapItem->attach( this );
}
d_mapItem->loadFile( d_mapRect, fileName );
rescale();
replot();
}
void Plot::rescale()
{
setAxisScale( QwtPlot::xBottom,
d_mapRect.left(), d_mapRect.right() );
setAxisScale( QwtPlot::yLeft,
d_mapRect.top(), d_mapRect.bottom() );
}
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