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.