Add files from zip

examples/curvedemo/curvedemo.pro

@@ -0,0 +1,15 @@
+################################################################
+# Qwt Examples
+# 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  = curvedemo
+
+SOURCES = \
+    main.cpp

examples/curvedemo/main.cpp

@@ -0,0 +1,184 @@
+/*****************************************************************************
+ * Qwt Examples
+ * 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 <QwtScaleMap>
+#include <QwtPlotCurve>
+#include <QwtSymbol>
+#include <QwtMath>
+
+#include <QPainter>
+#include <QApplication>
+#include <QFrame>
+
+const int Size = 27;
+const int CurvCnt = 6;
+
+namespace
+{
+    class CurveBox : public QFrame
+    {
+      public:
+        CurveBox();
+
+      protected:
+        virtual void paintEvent( QPaintEvent* ) QWT_OVERRIDE;
+
+      private:
+        void drawCurves( QPainter* );
+        void populate();
+        void shiftDown( QRect& rect, int offset ) const;
+
+        QwtPlotCurve m_curves[CurvCnt];
+
+        QwtScaleMap xMap;
+        QwtScaleMap yMap;
+
+        double xval[Size];
+        double yval[Size];
+    };
+}
+
+CurveBox::CurveBox()
+{
+    xMap.setScaleInterval( -0.5, 10.5 );
+    yMap.setScaleInterval( -1.1, 1.1 );
+
+    setFrameStyle( QFrame::Box | QFrame::Raised );
+    setLineWidth( 2 );
+    setMidLineWidth( 3 );
+
+    for( int i = 0; i < Size; i++ )
+    {
+        xval[i] = double( i ) * 10.0 / double( Size - 1 );
+        yval[i] = std::sin( xval[i] ) * std::cos( 2.0 * xval[i] );
+    }
+
+    populate();
+}
+
+void CurveBox::populate()
+{
+    int i = 0;
+
+    m_curves[i].setSymbol( new QwtSymbol( QwtSymbol::Cross, Qt::NoBrush,
+        QPen( Qt::black ), QSize( 5, 5 ) ) );
+    m_curves[i].setPen( Qt::darkGreen );
+    m_curves[i].setStyle( QwtPlotCurve::Lines );
+    m_curves[i].setCurveAttribute( QwtPlotCurve::Fitted );
+    i++;
+
+    m_curves[i].setSymbol( new QwtSymbol( QwtSymbol::Ellipse, Qt::yellow,
+        QPen( Qt::blue ), QSize( 5, 5 ) ) );
+    m_curves[i].setPen( Qt::red );
+    m_curves[i].setStyle( QwtPlotCurve::Sticks );
+    i++;
+
+    m_curves[i].setPen( Qt::darkBlue );
+    m_curves[i].setStyle( QwtPlotCurve::Lines );
+    i++;
+
+    m_curves[i].setPen( Qt::darkBlue );
+    m_curves[i].setStyle( QwtPlotCurve::Lines );
+    m_curves[i].setRenderHint( QwtPlotItem::RenderAntialiased );
+    i++;
+
+    m_curves[i].setPen( Qt::darkCyan );
+    m_curves[i].setStyle( QwtPlotCurve::Steps );
+    i++;
+
+    m_curves[i].setSymbol( new QwtSymbol( QwtSymbol::XCross, Qt::NoBrush,
+        QPen( Qt::darkMagenta ), QSize( 5, 5 ) ) );
+    m_curves[i].setStyle( QwtPlotCurve::NoCurve );
+    i++;
+
+    for( i = 0; i < CurvCnt; i++ )
+        m_curves[i].setRawSamples( xval, yval, Size );
+}
+
+void CurveBox::shiftDown( QRect& rect, int offset ) const
+{
+    rect.translate( 0, offset );
+}
+
+void CurveBox::paintEvent( QPaintEvent* event )
+{
+    QFrame::paintEvent( event );
+
+    QPainter painter( this );
+    painter.setClipRect( contentsRect() );
+
+    drawCurves( &painter );
+}
+
+void CurveBox::drawCurves( 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,
+            m_curves[i].testRenderHint( QwtPlotItem::RenderAntialiased ) );
+        m_curves[i].draw( painter, xMap, yMap, r );
+
+        shiftDown( r, deltay );
+    }
+
+    // draw titles
+    r = contentsRect();
+    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 app( argc, argv );
+
+    CurveBox curveBox;
+
+    curveBox.resize( 300, 600 );
+    curveBox.show();
+
+    return app.exec();
+}