check qwt-5.2, r588 into repository

2026-02-14 08:38:45 +00:00 · 2009-09-20 10:09:15 -07:00
parent cc7710b2c7
commit 44b602d775
279 changed files with 57199 additions and 0 deletions
--- a/qwt/examples/realtime_plot/incrementalplot.cpp
+++ b/qwt/examples/realtime_plot/incrementalplot.cpp
@@ -0,0 +1,122 @@
+#include <qwt_plot.h>
+#include <qwt_plot_canvas.h>
+#include <qwt_plot_curve.h>
+#include <qwt_symbol.h>
+#include "incrementalplot.h"
+#if QT_VERSION >= 0x040000
+#include <qpaintengine.h>
+#endif
+
+CurveData::CurveData():
+    d_count(0)
+{
+}
+
+void CurveData::append(double *x, double *y, int count)
+{
+    int newSize = ( (d_count + count) / 1000 + 1 ) * 1000;
+    if ( newSize > size() )
+    {
+        d_x.resize(newSize);
+        d_y.resize(newSize);
+    }
+
+    for ( register int i = 0; i < count; i++ )
+    {
+        d_x[d_count + i] = x[i];
+        d_y[d_count + i] = y[i];
+    }
+    d_count += count;
+}
+
+int CurveData::count() const
+{
+    return d_count;
+}
+
+int CurveData::size() const
+{
+    return d_x.size();
+}
+
+const double *CurveData::x() const
+{
+    return d_x.data();
+}
+
+const double *CurveData::y() const
+{
+    return d_y.data();
+}
+
+IncrementalPlot::IncrementalPlot(QWidget *parent): 
+    QwtPlot(parent),
+    d_data(NULL),
+    d_curve(NULL)
+{
+    setAutoReplot(false);
+}
+
+IncrementalPlot::~IncrementalPlot()
+{
+    delete d_data;
+}
+
+void IncrementalPlot::appendData(double x, double y)
+{
+    appendData(&x, &y, 1);
+}
+
+void IncrementalPlot::appendData(double *x, double *y, int size)
+{
+    if ( d_data == NULL )
+        d_data = new CurveData;
+
+    if ( d_curve == NULL )
+    {
+        d_curve = new QwtPlotCurve("Test Curve");
+        d_curve->setStyle(QwtPlotCurve::NoCurve);
+        d_curve->setPaintAttribute(QwtPlotCurve::PaintFiltered);
+    
+        const QColor &c = Qt::white;
+        d_curve->setSymbol(QwtSymbol(QwtSymbol::XCross,
+            QBrush(c), QPen(c), QSize(5, 5)) );
+
+        d_curve->attach(this);
+    }
+
+    d_data->append(x, y, size);
+    d_curve->setRawData(d_data->x(), d_data->y(), d_data->count());
+#ifdef __GNUC__
+#warning better use QwtData
+#endif
+
+    const bool cacheMode = 
+        canvas()->testPaintAttribute(QwtPlotCanvas::PaintCached);
+
+#if QT_VERSION >= 0x040000 && defined(Q_WS_X11)
+    // Even if not recommended by TrollTech, Qt::WA_PaintOutsidePaintEvent 
+    // works on X11. This has an tremendous effect on the performance..
+
+    canvas()->setAttribute(Qt::WA_PaintOutsidePaintEvent, true);
+#endif
+
+    canvas()->setPaintAttribute(QwtPlotCanvas::PaintCached, false);
+    d_curve->draw(d_curve->dataSize() - size, d_curve->dataSize() - 1);
+    canvas()->setPaintAttribute(QwtPlotCanvas::PaintCached, cacheMode);
+
+#if QT_VERSION >= 0x040000 && defined(Q_WS_X11)
+    canvas()->setAttribute(Qt::WA_PaintOutsidePaintEvent, false);
+#endif
+}
+
+void IncrementalPlot::removeData()
+{
+    delete d_curve;
+    d_curve = NULL;
+
+    delete d_data;
+    d_data = NULL;
+
+    replot();
+}