彻底改版2.0

third/3rd_qwt/qwt_plot_seriesitem.cpp

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+/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
+ * 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 "qwt_plot_seriesitem.h"
+
+class QwtPlotSeriesItem::PrivateData
+{
+public:
+    PrivateData():
+        orientation( Qt::Vertical )
+    {
+    }
+
+    Qt::Orientation orientation;
+};
+
+/*!
+  Constructor
+  \param title Title of the curve
+*/
+QwtPlotSeriesItem::QwtPlotSeriesItem( const QwtText &title ):
+    QwtPlotItem( title )
+{
+    d_data = new PrivateData();
+    setItemInterest( QwtPlotItem::ScaleInterest, true );
+}
+
+/*!
+  Constructor
+  \param title Title of the curve
+*/
+QwtPlotSeriesItem::QwtPlotSeriesItem( const QString &title ):
+    QwtPlotItem( QwtText( title ) )
+{
+    d_data = new PrivateData();
+    setItemInterest( QwtPlotItem::ScaleInterest, true );
+}
+
+//! Destructor
+QwtPlotSeriesItem::~QwtPlotSeriesItem()
+{
+    delete d_data;
+}
+
+/*!
+  Set the orientation of the item.
+
+  The orientation() might be used in specific way by a plot item.
+  F.e. a QwtPlotCurve uses it to identify how to display the curve
+  int QwtPlotCurve::Steps or QwtPlotCurve::Sticks style.
+
+  \sa orientation()
+*/
+void QwtPlotSeriesItem::setOrientation( Qt::Orientation orientation )
+{
+    if ( d_data->orientation != orientation )
+    {
+        d_data->orientation = orientation;
+
+        legendChanged();
+        itemChanged();
+    }
+}
+
+/*!
+  \return Orientation of the plot item
+  \sa setOrientation()
+*/
+Qt::Orientation QwtPlotSeriesItem::orientation() const
+{
+    return d_data->orientation;
+}
+
+/*!
+  \brief Draw the complete series
+
+  \param painter Painter
+  \param xMap Maps x-values into pixel coordinates.
+  \param yMap Maps y-values into pixel coordinates.
+  \param canvasRect Contents rectangle of the canvas
+*/
+void QwtPlotSeriesItem::draw( QPainter *painter,
+        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
+        const QRectF &canvasRect ) const
+{
+    drawSeries( painter, xMap, yMap, canvasRect, 0, -1 );
+}
+
+QRectF QwtPlotSeriesItem::boundingRect() const
+{
+    return dataRect();
+}
+
+void QwtPlotSeriesItem::updateScaleDiv(
+    const QwtScaleDiv &xScaleDiv, const QwtScaleDiv &yScaleDiv )
+{
+    const QRectF rect = QRectF(
+        xScaleDiv.lowerBound(), yScaleDiv.lowerBound(),
+        xScaleDiv.range(), yScaleDiv.range() );
+
+    setRectOfInterest( rect );
+}
+
+void QwtPlotSeriesItem::dataChanged()
+{
+    itemChanged();
+}