qwtgrid(3)
NAME
QwtGrid
SYNOPSIS
Inherited by QwtPlotGrid.
Detailed Description
A class which draws a coordinate grid.
The QwtGrid 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 QwtGrid::setXDiv and
QwtGrid::setYDiv() The draw() member draws the grid within a bounding
rectangle.
- Definition at line 32 of file qwt_grid.h.
- Public Member Functions
- QwtGrid ()
virtual ~QwtGrid ()
virtual void draw (QPainter *p, const QRect &r, const QwtDiMap &mx,const QwtDiMap &my) 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 - Protected Member Functions
- virtual void gridChanged ()
Constructor & Destructor Documentation
- QwtGrid::QwtGrid ()
- Enables major grid, disables minor grid.
- Definition at line 15 of file qwt_grid.cpp.
- QwtGrid::~QwtGrid () [virtual]
- dtor
- Definition at line 24 of file qwt_grid.cpp.
Member Function Documentation
- void QwtGrid::draw (QPainter * p, const QRect & r, const QwtDiMap & mx,
- const QwtDiMap & my) 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:
p Painter
r Bounding rectangle
mx X axis map
my Y axis - Definition at line 170 of file qwt_grid.cpp.
- References QwtPainter::drawLine(), QwtScaleDiv::majCnt(),
QwtScaleDiv::majMark(), QwtScaleDiv::minCnt(), QwtScaleDiv::minMark(), and QwtDiMap::transform(). - Referenced by QwtPlot::drawCanvasItems().
- void QwtGrid::enableX (bool tf)
- Enable or disable vertical gridlines.
- Parameters:
tf Enable (TRUE) or disable
- See also:
Minor gridlines can be enabled or disabled with
QwtGrid::enableXMin() - Definition at line 35 of file qwt_grid.cpp.
- References gridChanged().
- Referenced by QwtPlot::enableGridX().
- void QwtGrid::enableXMin (bool tf)
- Enable or disable minor vertical gridlines.
- Parameters:
tf Enable (TRUE) or disable
- See also:
QwtGrid::enableX()
- Definition at line 63 of file qwt_grid.cpp.
- References gridChanged().
- Referenced by QwtPlot::enableGridXMin().
- void QwtGrid::enableY (bool tf)
- Enable or disable horizontal gridlines.
- Parameters:
tf Enable (TRUE) or disable
- See also:
Minor gridlines can be enabled or disabled with
QwtGrid::enableYMin() - Definition at line 49 of file qwt_grid.cpp.
- References gridChanged().
- Referenced by QwtPlot::enableGridY().
- void QwtGrid::enableYMin (bool tf)
- Enable or disable minor horizontal gridlines.
- Parameters:
tf Enable (TRUE) or disable
- See also:
QwtGrid::enableY()
- Definition at line 77 of file qwt_grid.cpp.
- References gridChanged().
- Referenced by QwtPlot::enableGridYMin().
- void QwtGrid::gridChanged () [protected, virtual]
- Notify a change of attributes.
- This virtual function is called when an attribute of the grid has
changed. It can be redefined by derived classes. The default
implementation does nothing. - Reimplemented in QwtPlotGrid.
- Definition at line 304 of file qwt_grid.cpp.
- Referenced by enableX(), enableXMin(), enableY(), enableYMin(),
setMajPen(), setMinPen(), setPen(), setXDiv(), and setYDiv(). - const QPen & QwtGrid::majPen () const
- Returns:
the pen for the major gridlines
- See also:
QwtGrid::setMinPen, QwtGrid::setPen
- Definition at line 234 of file qwt_grid.cpp.
- Referenced by QwtPlotPrintFilter::apply(), QwtPlot::gridMajPen(), and
QwtPlotPrintFilter::reset(). - const QPen & QwtGrid::minPen () const
- Returns:
the pen for the minor gridlines
- See also:
QwtGrid::setMinPen, QwtGrid::setPen
- Definition at line 243 of file qwt_grid.cpp.
- Referenced by QwtPlotPrintFilter::apply(), QwtPlot::gridMinPen(), and
QwtPlotPrintFilter::reset(). - void QwtGrid::setMajPen (const QPen & p)
- Assign a pen for the major gridlines.
- Parameters:
p Pen
- Definition at line 136 of file qwt_grid.cpp.
- References gridChanged().
- Referenced by QwtPlotPrintFilter::apply(), QwtPlotPrintFilter::reset(), and QwtPlot::setGridMajPen().
- void QwtGrid::setMinPen (const QPen & p)
- Assign a pen for the minor gridlines.
- Parameters:
p Pen
- Definition at line 149 of file qwt_grid.cpp.
- References gridChanged().
- Referenced by QwtPlotPrintFilter::apply(), QwtPlotPrintFilter::reset(), and QwtPlot::setGridMinPen().
- void QwtGrid::setPen (const QPen & p)
- Assign a pen for both major and minor gridlines.
- Parameters:
p Pen
- Definition at line 122 of file qwt_grid.cpp.
- References gridChanged().
- Referenced by QwtPlot::setGridPen().
- void QwtGrid::setXDiv (const QwtScaleDiv & sx)
- Assign an x axis scale division.
- Parameters:
sx Scale division
- Warning:
QwtGrid uses implicit sharing (see Qt Manual) for the scale
divisions. - See also:
QwtScaleDiv
- Definition at line 93 of file qwt_grid.cpp.
- References gridChanged().
- Referenced by QwtPlot::setGridXAxis(), and QwtPlot::updateAxes().
- void QwtGrid::setYDiv (const QwtScaleDiv & sy)
- Assign a y axis division.
- Parameters:
sy Scale division
- Warning:
QwtGrid uses implicit sharing (see Qt Manual) for the scale
divisions. - See also:
QwtScaleDiv
- Definition at line 109 of file qwt_grid.cpp.
- References gridChanged().
- Referenced by QwtPlot::setGridYAxis(), and QwtPlot::updateAxes().
- bool QwtGrid::xEnabled () const
- Returns:
TRUE if vertical gridlines are enabled
- See also:
QwtGrid::enableX
- Definition at line 252 of file qwt_grid.cpp.
- Referenced by QwtPlot::gridXEnabled().
- bool QwtGrid::xMinEnabled () const
- Returns:
TRUE if minor vertical gridlines are enabled
- See also:
QwtGrid::enableXMin
- Definition at line 261 of file qwt_grid.cpp.
- Referenced by QwtPlot::gridXMinEnabled().
- const QwtScaleDiv & QwtGrid::xScaleDiv () const
- Returns:
the scale division of the x axis
- Definition at line 286 of file qwt_grid.cpp.
- bool QwtGrid::yEnabled () const
- Returns:
TRUE if horizontal gridlines are enabled
- See also:
QwtGrid::enableY
- Definition at line 270 of file qwt_grid.cpp.
- Referenced by QwtPlot::gridYEnabled().
- bool QwtGrid::yMinEnabled () const
- Returns:
TRUE if minor horizontal gridlines are enabled
- See also:
QwtGrid::enableYMin
- Definition at line 279 of file qwt_grid.cpp.
- Referenced by QwtPlot::gridYMinEnabled().
- const QwtScaleDiv & QwtGrid::yScaleDiv () const
- Returns:
the scale division of the y axis
- Definition at line 292 of file qwt_grid.cpp.
Author
- Generated automatically by Doxygen for Qwt User's Guide from the source
code.