trusty (3) QwtPlotGrid.3.gz

NAME

       QwtPlotGrid -

       A class which draws a coordinate grid.

SYNOPSIS

       #include <qwt_plot_grid.h>

       Inherits QwtPlotItem.

   Public Member Functions
       QwtPlotGrid ()
       virtual ~QwtPlotGrid ()
       virtual int rtti () const
       void enableX (bool tf)
       bool xEnabled () const
       void enableY (bool tf)
       bool yEnabled () const
       void enableXMin (bool tf)
       bool xMinEnabled () const
       void enableYMin (bool tf)
       bool yMinEnabled () const
       void setXDiv (const QwtScaleDiv &sx)
       const QwtScaleDiv & xScaleDiv () const
       void setYDiv (const QwtScaleDiv &sy)
       const QwtScaleDiv & yScaleDiv () const
       void setPen (const QPen &p)
       void setMajPen (const QPen &p)
       const QPen & majPen () const
       void setMinPen (const QPen &p)
       const QPen & minPen () const
       virtual void draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &rect)
           const
       virtual void updateScaleDiv (const QwtScaleDiv &xMap, const QwtScaleDiv &yMap)

Detailed Description

       A class which draws a coordinate grid.

       The QwtPlotGrid class can be used to draw a coordinate grid. A coordinate grid consists of major and
       minor vertical and horizontal gridlines. The locations of the gridlines are determined by the X and Y
       scale divisions which can be assigned with setXDiv() and setYDiv(). The draw() member draws the grid
       within a bounding rectangle.

Constructor & Destructor Documentation

   QwtPlotGrid::QwtPlotGrid () [explicit]
       Enables major grid, disables minor grid.

   QwtPlotGrid::~QwtPlotGrid () [virtual]
       Destructor.

Member Function Documentation

   void QwtPlotGrid::draw (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF
       &canvasRect) const [virtual]
       Draw the grid. The grid is drawn into the bounding rectangle such that gridlines begin and end at the
       rectangle's borders. The X and Y maps are used to map the scale divisions into the drawing region screen.

       Parameters:
           painter Painter
           xMap X axis map
           yMap Y axis
           canvasRect Contents rect of the plot canvas

       Implements QwtPlotItem.

   void QwtPlotGrid::enableX (booltf)
       Enable or disable vertical gridlines. Parameters:
           tf Enable (true) or disable

       See also:
           Minor gridlines can be enabled or disabled with enableXMin()

   void QwtPlotGrid::enableXMin (booltf)
       Enable or disable minor vertical gridlines. Parameters:
           tf Enable (true) or disable

       See also:
           enableX()

   void QwtPlotGrid::enableY (booltf)
       Enable or disable horizontal gridlines. Parameters:
           tf Enable (true) or disable

       See also:
           Minor gridlines can be enabled or disabled with enableYMin()

   void QwtPlotGrid::enableYMin (booltf)
       Enable or disable minor horizontal gridlines. Parameters:
           tf Enable (true) or disable

       See also:
           enableY()

   const QPen & QwtPlotGrid::majPen () const Returns:
           the pen for the major gridlines

       See also:
           setMajPen(), setMinPen(), setPen()

   const QPen & QwtPlotGrid::minPen () const Returns:
           the pen for the minor gridlines

       See also:
           setMinPen(), setMajPen(), setPen()

   int QwtPlotGrid::rtti () const [virtual] Returns:
           QwtPlotItem::Rtti_PlotGrid

       Reimplemented from QwtPlotItem.

   void QwtPlotGrid::setMajPen (const QPen &pen) Assign a pen for the major gridlines
       Parameters:
           pen Pen

       See also:
           majPen(), setMinPen(), setPen()

   void QwtPlotGrid::setMinPen (const QPen &pen) Assign a pen for the minor gridlines
       Parameters:
           pen Pen

       See also:
           minPen(), setMajPen(), setPen()

   void QwtPlotGrid::setPen (const QPen &pen) Assign a pen for both major and minor gridlines
       Parameters:
           pen Pen

       See also:
           setMajPen(), setMinPen()

   void QwtPlotGrid::setXDiv (const QwtScaleDiv &scaleDiv) Assign an x axis scale division
       Parameters:
           scaleDiv Scale division

   void QwtPlotGrid::setYDiv (const QwtScaleDiv &scaleDiv) Assign a y axis division
       Parameters:
           scaleDiv Scale division

   void QwtPlotGrid::updateScaleDiv (const QwtScaleDiv &xScaleDiv, const QwtScaleDiv &yScaleDiv) [virtual]
       Update the grid to changes of the axes scale division
       Parameters:
           xScaleDiv Scale division of the x-axis
           yScaleDiv Scale division of the y-axis

       See also:
           QwtPlot::updateAxes()

       Reimplemented from QwtPlotItem.

   bool QwtPlotGrid::xEnabled () const Returns:
           true if vertical gridlines are enabled

       See also:
           enableX()

   bool QwtPlotGrid::xMinEnabled () const Returns:
           true if minor vertical gridlines are enabled

       See also:
           enableXMin()

   const QwtScaleDiv & QwtPlotGrid::xScaleDiv () const Returns:
           the scale division of the x axis

   bool QwtPlotGrid::yEnabled () const Returns:
           true if horizontal gridlines are enabled

       See also:
           enableY()

   bool QwtPlotGrid::yMinEnabled () const Returns:
           true if minor horizontal gridlines are enabled

       See also:
           enableYMin()

   const QwtScaleDiv & QwtPlotGrid::yScaleDiv () const Returns:
           the scale division of the y axis

Author

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