Plot::Plot( QWidget *parent ):
QwtPlot( parent ),
d_curve( NULL )
{
/*canvas()->setStyleSheet(
"border: 2px solid Black;"
"border-radius: 15px;"
"background-color: qlineargradient( x1: 0, y1: 0, x2: 0, y2: 1,"
"stop: 0 LemonChiffon, stop: 1 PaleGoldenrod );"
);*/
//QwtPlotCanvas *newcanvas=new QwtPlotCanvas();
//newcanvas->setPalette(Qt::white);
//newcanvas->setBorderRadius(10);
//setCanvas( newcanvas );
//plotLayout()->setAlignCanvasToScales( true );
setAxisTitle( QwtPlot::yLeft, "ylabel" );
setAxisTitle( QwtPlot::xBottom, "xlabel" );
//setAxisScale(QwtPlot::yLeft,0.0,25.0);
//setAxisScale(QwtPlot::xBottom,0.0,25.0);
//canvas()->resize(800, 600);
//plotLayout(AlignScales);
// attach curve
d_curve = new QwtPlotCurve( "Scattered Points" );
d_curve->setPen( QColor( "Black" ) );
// d_curve->setCurveAttribute(fitten);
// when using QwtPlotCurve::ImageBuffer simple dots can be
// rendered in parallel on multicore systems.
d_curve->setRenderThreadCount( 0 ); // 0: use QThread::idealThreadCount()
//d_curve->setCurveAttribute(QwtPlotCurve::Fitted, true);
d_curve->attach( this );
QwtSymbol * symbol2 = new QwtSymbol( QwtSymbol::XCross, QBrush(Qt::white), QPen(Qt::red, 1), QSize(6,6));
//QwtSymbol::Style style = Cross;
setSymbol( symbol2 );
//setSymbol(NULL);
// panning with the left mouse button
(void )new QwtPlotPanner( canvas() );
// zoom in/out with the wheel
QwtPlotMagnifier *magnifier = new QwtPlotMagnifier( canvas() );
magnifier->setMouseButton( Qt::NoButton );
// distanve measurement with the right mouse button
DistancePicker *picker = new DistancePicker( canvas() );
picker->setMousePattern( QwtPlotPicker::MouseSelect1, Qt::RightButton );
picker->setRubberBandPen( QPen( Qt::blue ) );
QwtPlotGrid *grid = new QwtPlotGrid;
grid->enableX( true );//设置网格线
grid->enableY( true );
grid->setMajorPen( Qt::black, 0, Qt::DotLine );
grid->attach( this );
//QSize sizeH = sizeHint();
}
void MainWindow::enableMagnifier() //приближение-удаление
{
// #include <qwt_plot_magnifier.h>
QwtPlotMagnifier *magnifier =
new QwtPlotMagnifier(ui->Qwt_Widget->canvas());
// клавиша, активирующая приближение/удаление
magnifier->setMouseButton(Qt::MidButton);
}