ground/gcs/src/libs/qwt/src/qwt_plot_seriesitem.cpp

   1 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
   2  * Qwt Widget Library
   3  * Copyright (C) 1997   Josef Wilgen
   4  * Copyright (C) 2002   Uwe Rathmann
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the Qwt License, Version 1.0
   8  *****************************************************************************/
   9
  10 #include "qwt_plot_seriesitem.h"
  11
  12 class QwtPlotSeriesItem::PrivateData
  13 {
  14 public:
  15     PrivateData():
  16         orientation( Qt::Vertical )
  17     {
  18     }
  19
  20     Qt::Orientation orientation;
  21 };
  22
  23 /*!
  24   Constructor
  25   \param title Title of the curve
  26 */
  27 QwtPlotSeriesItem::QwtPlotSeriesItem( const QwtText &title ):
  28     QwtPlotItem( title )
  29 {
  30     d_data = new PrivateData();
  31     setItemInterest( QwtPlotItem::ScaleInterest, true );
  32 }
  33
  34 /*!
  35   Constructor
  36   \param title Title of the curve
  37 */
  38 QwtPlotSeriesItem::QwtPlotSeriesItem( const QString &title ):
  39     QwtPlotItem( QwtText( title ) )
  40 {
  41     d_data = new PrivateData();
  42 }
  43
  44 //! Destructor
  45 QwtPlotSeriesItem::~QwtPlotSeriesItem()
  46 {
  47     delete d_data;
  48 }
  49
  50 /*!
  51   Set the orientation of the item.
  52
  53   The orientation() might be used in specific way by a plot item.
  54   F.e. a QwtPlotCurve uses it to identify how to display the curve
  55   int QwtPlotCurve::Steps or QwtPlotCurve::Sticks style.
  56
  57   \sa orientation()
  58 */
  59 void QwtPlotSeriesItem::setOrientation( Qt::Orientation orientation )
  60 {
  61     if ( d_data->orientation != orientation )
  62     {
  63         d_data->orientation = orientation;
  64
  65         legendChanged();
  66         itemChanged();
  67     }
  68 }
  69
  70 /*!
  71   \return Orientation of the plot item
  72   \sa setOrientation()
  73 */
  74 Qt::Orientation QwtPlotSeriesItem::orientation() const
  75 {
  76     return d_data->orientation;
  77 }
  78
  79 /*!
  80   \brief Draw the complete series
  81
  82   \param painter Painter
  83   \param xMap Maps x-values into pixel coordinates.
  84   \param yMap Maps y-values into pixel coordinates.
  85   \param canvasRect Contents rectangle of the canvas
  86 */
  87 void QwtPlotSeriesItem::draw( QPainter *painter,
  88         const QwtScaleMap &xMap, const QwtScaleMap &yMap,
  89         const QRectF &canvasRect ) const
  90 {
  91     drawSeries( painter, xMap, yMap, canvasRect, 0, -1 );
  92 }
  93
  94 QRectF QwtPlotSeriesItem::boundingRect() const
  95 {
  96     return dataRect();
  97 }
  98
  99 void QwtPlotSeriesItem::updateScaleDiv(
 100     const QwtScaleDiv &xScaleDiv, const QwtScaleDiv &yScaleDiv )
 101 {
 102     const QRectF rect = QRectF(
 103         xScaleDiv.lowerBound(), yScaleDiv.lowerBound(),
 104         xScaleDiv.range(), yScaleDiv.range() );
 105
 106     setRectOfInterest( rect );
 107 }
 108
 109 void QwtPlotSeriesItem::dataChanged()
 110 {
 111     itemChanged();
 112 }