Add files from zip

playground/shapes/main.cpp

@@ -0,0 +1,109 @@
+/*****************************************************************************
+ * Qwt Examples - Copyright (C) 2002 Uwe Rathmann
+ * This file may be used under the terms of the 3-clause BSD License
+ *****************************************************************************/
+
+#include <QwtPlot>
+#include <QwtLegend>
+#include <QwtPlotPanner>
+#include <QwtPlotMagnifier>
+#include <QwtPlotShapeItem>
+
+#include <QApplication>
+#include <QPainterPath>
+
+namespace
+{
+    class ShapeItem : public QwtPlotShapeItem
+    {
+      public:
+        ShapeItem()
+            : QwtPlotShapeItem( "Shape" )
+        {
+            setRenderHint( QwtPlotItem::RenderAntialiased, true );
+            setRenderTolerance( 1.0 );
+
+            setPen( Qt::yellow );
+
+            QColor c = Qt::darkRed;
+            c.setAlpha( 100 );
+            setBrush( c );
+
+            setShape( demoShape() );
+        }
+
+      private:
+        static QPainterPath demoShape()
+        {
+            const double d = 900.0;
+            const QRectF rect( 1.0, 1.0, d, d );
+
+            QPainterPath path;
+            //path.setFillRule( Qt::WindingFill );
+            path.addEllipse( rect );
+
+            const QRectF rect2 = rect.adjusted( 0.2 * d, 0.3 * d, -0.22 * d, 1.5 * d );
+            path.addEllipse( rect2 );
+
+#if 0
+            QFont font;
+            font.setPointSizeF( 200 );
+            QPainterPath textPath;
+            textPath.addText( rect.center(), font, "Shape" );
+
+            QTransform transform;
+            transform.translate( rect.center().x() - 600, rect.center().y() + 50 );
+            transform.rotate( 180.0, Qt::XAxis );
+
+            textPath = transform.map( textPath );
+
+            path.addPath( textPath );
+#endif
+            return path;
+        }
+    };
+
+    class Plot : public QwtPlot
+    {
+      public:
+        Plot()
+        {
+            setPalette( QColor( 60, 60, 60 ) );
+            canvas()->setPalette( Qt::white );
+
+            // panning with the left mouse button
+            ( void ) new QwtPlotPanner( canvas() );
+
+            // zoom in/out with the wheel
+            ( void ) new QwtPlotMagnifier( canvas() );
+
+            setTitle( "Shapes" );
+            insertLegend( new QwtLegend(), QwtPlot::RightLegend );
+
+            // axes
+            using namespace QwtAxis;
+
+            setAxisTitle( XBottom, "x -->" );
+            setAxisTitle( YLeft, "y -->" );
+#if 0
+            setAxisScaleEngine( XBottom, new QwtLog10ScaleEngine );
+            setAxisScaleEngine( YLeft, new QwtLog10ScaleEngine );
+#endif
+
+            ShapeItem* item = new ShapeItem();
+            item->setItemAttribute( QwtPlotItem::Legend, true );
+            item->attach( this );
+        }
+    };
+}
+
+int main( int argc, char* argv[] )
+{
+    QApplication app( argc, argv );
+
+    Plot plot;
+    plot.resize( 600, 400 );
+    plot.show();
+
+    return app.exec();
+}