Released version 6.1.3

examples/curvdemo1/curvdemo1.cpp

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+
+#include <qwt_scale_map.h>
+#include <qwt_plot_curve.h>
+#include <qwt_symbol.h>
+#include <qwt_math.h>
+#include <qcolor.h>
+#include <qpainter.h>
+#include <qapplication.h>
+#include <qframe.h>
+
+//------------------------------------------------------------
+//      curvdemo1
+//
+//  This example program features some of the different
+//  display styles of the QwtPlotCurve class
+//------------------------------------------------------------
+
+
+//
+//   Array Sizes
+//
+const int Size = 27;
+const int CurvCnt = 6;
+
+//
+//   Arrays holding the values
+//
+double xval[Size];
+double yval[Size];
+QwtScaleMap xMap;
+QwtScaleMap yMap;
+
+class MainWin : public QFrame
+{
+public:
+    MainWin();
+
+protected:
+    virtual void paintEvent( QPaintEvent * );
+    void drawContents( QPainter *p );
+
+private:
+    void shiftDown( QRect &rect, int offset ) const;
+
+    QwtPlotCurve d_curves[CurvCnt];
+};
+
+MainWin::MainWin()
+{
+    int i;
+
+    xMap.setScaleInterval( -0.5, 10.5 );
+    yMap.setScaleInterval( -1.1, 1.1 );
+
+    //
+    //  Frame style
+    //
+    setFrameStyle( QFrame::Box | QFrame::Raised );
+    setLineWidth( 2 );
+    setMidLineWidth( 3 );
+
+    //
+    // Calculate values
+    //
+    for( i = 0; i < Size; i++ )
+    {
+        xval[i] = double( i ) * 10.0 / double( Size - 1 );
+        yval[i] = qSin( xval[i] ) * qCos( 2.0 * xval[i] );
+    }
+
+    //
+    //  define curve styles
+    //
+    i = 0;
+
+    d_curves[i].setSymbol( new QwtSymbol( QwtSymbol::Cross, Qt::NoBrush,
+        QPen( Qt::black ), QSize( 5, 5 ) ) );
+    d_curves[i].setPen( Qt::darkGreen );
+    d_curves[i].setStyle( QwtPlotCurve::Lines );
+    d_curves[i].setCurveAttribute( QwtPlotCurve::Fitted );
+    i++;
+
+    d_curves[i].setSymbol( new QwtSymbol( QwtSymbol::Ellipse, Qt::yellow,
+        QPen( Qt::blue ), QSize( 5, 5 ) ) );
+    d_curves[i].setPen( Qt::red );
+    d_curves[i].setStyle( QwtPlotCurve::Sticks );
+    i++;
+
+    d_curves[i].setPen( Qt::darkBlue );
+    d_curves[i].setStyle( QwtPlotCurve::Lines );
+    i++;
+
+    d_curves[i].setPen( Qt::darkBlue );
+    d_curves[i].setStyle( QwtPlotCurve::Lines );
+    d_curves[i].setRenderHint( QwtPlotItem::RenderAntialiased );
+    i++;
+
+    d_curves[i].setPen( Qt::darkCyan );
+    d_curves[i].setStyle( QwtPlotCurve::Steps );
+    i++;
+
+    d_curves[i].setSymbol( new QwtSymbol( QwtSymbol::XCross, Qt::NoBrush,
+        QPen( Qt::darkMagenta ), QSize( 5, 5 ) ) );
+    d_curves[i].setStyle( QwtPlotCurve::NoCurve );
+    i++;
+
+
+    //
+    // attach data
+    //
+    for( i = 0; i < CurvCnt; i++ )
+        d_curves[i].setRawSamples( xval, yval, Size );
+}
+
+void MainWin::shiftDown( QRect &rect, int offset ) const
+{
+    rect.translate( 0, offset );
+}
+
+void MainWin::paintEvent( QPaintEvent *event )
+{
+    QFrame::paintEvent( event );
+
+    QPainter painter( this );
+    painter.setClipRect( contentsRect() );
+    drawContents( &painter );
+}
+
+
+//
+//  REDRAW CONTENTS
+//
+void MainWin::drawContents( QPainter *painter )
+{
+    int deltay, i;
+
+    QRect r = contentsRect();
+
+    deltay = r.height() / CurvCnt - 1;
+
+    r.setHeight( deltay );
+
+    //
+    //  draw curves
+    //
+    for ( i = 0; i < CurvCnt; i++ )
+    {
+        xMap.setPaintInterval( r.left(), r.right() );
+        yMap.setPaintInterval( r.top(), r.bottom() );
+
+        painter->setRenderHint( QPainter::Antialiasing,
+            d_curves[i].testRenderHint( QwtPlotItem::RenderAntialiased ) );
+        d_curves[i].draw( painter, xMap, yMap, r );
+
+        shiftDown( r, deltay );
+    }
+
+    //
+    // draw titles
+    //
+    r = contentsRect();     // reset r
+    painter->setFont( QFont( "Helvetica", 8 ) );
+
+    const int alignment = Qt::AlignTop | Qt::AlignHCenter;
+
+    painter->setPen( Qt::black );
+
+    painter->drawText( 0, r.top(), r.width(), painter->fontMetrics().height(),
+        alignment, "Style: Line/Fitted, Symbol: Cross" );
+    shiftDown( r, deltay );
+
+    painter->drawText( 0, r.top(), r.width(), painter->fontMetrics().height(),
+        alignment, "Style: Sticks, Symbol: Ellipse" );
+    shiftDown( r, deltay );
+
+    painter->drawText( 0 , r.top(), r.width(), painter->fontMetrics().height(),
+        alignment, "Style: Lines, Symbol: None" );
+    shiftDown( r, deltay );
+
+    painter->drawText( 0 , r.top(), r.width(), painter->fontMetrics().height(),
+        alignment, "Style: Lines, Symbol: None, Antialiased" );
+    shiftDown( r, deltay );
+
+    painter->drawText( 0, r.top(), r.width(), painter->fontMetrics().height(),
+        alignment, "Style: Steps, Symbol: None" );
+    shiftDown( r, deltay );
+
+    painter->drawText( 0, r.top(), r.width(), painter->fontMetrics().height(),
+        alignment, "Style: NoCurve, Symbol: XCross" );
+}
+
+int main ( int argc, char **argv )
+{
+    QApplication a( argc, argv );
+
+    MainWin w;
+
+    w.resize( 300, 600 );
+    w.show();
+
+    return a.exec();
+}

examples/curvdemo1/curvdemo1.pro

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+################################################################
+# Qwt Widget Library
+# Copyright (C) 1997   Josef Wilgen
+# Copyright (C) 2002   Uwe Rathmann
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the Qwt License, Version 1.0
+################################################################
+
+include( $${PWD}/../examples.pri )
+
+TARGET  = curvdemo1
+
+SOURCES = \
+    curvdemo1.cpp