彻底改版2.0

third/qwtdemo/examples/simpleplot/simpleplot.cpp

@@ -0,0 +1,42 @@
+#include <qapplication.h>
+#include <qwt_plot.h>
+#include <qwt_plot_curve.h>
+#include <qwt_plot_grid.h>
+#include <qwt_symbol.h>
+#include <qwt_legend.h>
+
+int main( int argc, char **argv )
+{
+    QApplication a( argc, argv );
+
+    QwtPlot plot;
+    plot.setTitle( "Plot Demo" );
+    plot.setCanvasBackground( Qt::white );
+    plot.setAxisScale( QwtPlot::yLeft, 0.0, 10.0 );
+    plot.insertLegend( new QwtLegend() );
+
+    QwtPlotGrid *grid = new QwtPlotGrid();
+    grid->attach( &plot );
+
+    QwtPlotCurve *curve = new QwtPlotCurve();
+    curve->setTitle( "Some Points" );
+    curve->setPen( Qt::blue, 4 ),
+    curve->setRenderHint( QwtPlotItem::RenderAntialiased, true );
+
+    QwtSymbol *symbol = new QwtSymbol( QwtSymbol::Ellipse,
+        QBrush( Qt::yellow ), QPen( Qt::red, 2 ), QSize( 8, 8 ) );
+    curve->setSymbol( symbol );
+
+    QPolygonF points;
+    points << QPointF( 0.0, 4.4 ) << QPointF( 1.0, 3.0 )
+        << QPointF( 2.0, 4.5 ) << QPointF( 3.0, 6.8 )
+        << QPointF( 4.0, 7.9 ) << QPointF( 5.0, 7.1 );
+    curve->setSamples( points );
+
+    curve->attach( &plot );
+
+    plot.resize( 600, 400 );
+    plot.show();
+
+    return a.exec();
+}