plot.cpp
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#include "plot.h"
#include "editor.h"
#include <qwt_plot_shapeitem.h>
#include <qwt_plot_magnifier.h>
#include <qwt_plot_canvas.h>
#include <qwt_legend.h>
#include <qwt_plot_renderer.h>
class Legend: public QwtLegend
{
protected:
virtual QWidget *createWidget( const QwtLegendData &data ) const
{
QWidget *w = QwtLegend::createWidget( data );
if ( w )
{
w->setStyleSheet(
"border-radius: 5px;"
"padding: 2px;"
"background: LemonChiffon;"
);
}
return w;
}
};
Plot::Plot( QWidget *parent ):
QwtPlot( parent )
{
setAutoReplot( false );
setTitle( "Movable Items" );
const int margin = 5;
setContentsMargins( margin, margin, margin, margin );
setAutoFillBackground( true );
setPalette( QColor( "DimGray" ).lighter( 110 ) );
QwtPlotCanvas *canvas = new QwtPlotCanvas();
#if 0
// a gradient making a replot slow on X11
canvas->setStyleSheet(
"border: 2px solid Black;"
"border-radius: 15px;"
"background-color: qlineargradient( x1: 0, y1: 0, x2: 0, y2: 1,"
"stop: 0 LemonChiffon, stop: 0.5 PaleGoldenrod, stop: 1 LemonChiffon );"
);
#else
canvas->setStyleSheet(
"border: 2px inset DimGray;"
"border-radius: 15px;"
"background: LemonChiffon;"
);
#endif
setCanvas( canvas );
insertLegend( new Legend(), QwtPlot::RightLegend );
populate();
updateAxes();
for ( int axis = 0; axis < QwtPlot::axisCnt; axis++ )
setAxisAutoScale( axis, false );
d_editor = new Editor( this );
( void ) new QwtPlotMagnifier( canvas );
}
void Plot::populate()
{
addShape( "Rectangle", ShapeFactory::Rect, "RoyalBlue",
QPointF( 30.0, 50.0 ), QSizeF( 40.0, 50.0 ) );
addShape( "Ellipse", ShapeFactory::Ellipse, "IndianRed",
QPointF( 80.0, 130.0 ), QSizeF( 50.0, 40.0 ) );
addShape( "Ring", ShapeFactory::Ring, "DarkOliveGreen",
QPointF( 30.0, 165.0 ), QSizeF( 40.0, 40.0 ) );
addShape( "Triangle", ShapeFactory::Triangle, "SandyBrown",
QPointF( 165.0, 165.0 ), QSizeF( 60.0, 40.0 ) );
addShape( "Star", ShapeFactory::Star, "DarkViolet",
QPointF( 165.0, 50.0 ), QSizeF( 40.0, 50.0 ) );
addShape( "Hexagon", ShapeFactory::Hexagon, "DarkSlateGray",
QPointF( 120.0, 70.0 ), QSizeF( 50.0, 50.0 ) );
}
void Plot::addShape( const QString &title,
ShapeFactory::Shape shape, const QColor &color,
const QPointF &pos, const QSizeF &size )
{
QwtPlotShapeItem *item = new QwtPlotShapeItem( title );
item->setItemAttribute( QwtPlotItem::Legend, true );
item->setLegendMode( QwtPlotShapeItem::LegendShape );
item->setLegendIconSize( QSize( 20, 20 ) );
item->setRenderHint( QwtPlotItem::RenderAntialiased, true );
item->setShape( ShapeFactory::path( shape, pos, size ) );
QColor fillColor = color;
fillColor.setAlpha( 200 );
QPen pen( color, 3 );
pen.setJoinStyle( Qt::MiterJoin );
item->setPen( pen );
item->setBrush( fillColor );
item->attach( this );
}
void Plot::exportPlot()
{
QwtPlotRenderer renderer;
renderer.exportTo( this, "shapes.pdf" );
}
void Plot::setMode( int mode )
{
d_editor->setMode( static_cast<Editor::Mode>( mode ) );
}