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 () |
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Enables major grid, disables minor grid. Definition at line 15 of file qwt_grid.cpp. |
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dtor Definition at line 24 of file qwt_grid.cpp. |
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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.
References QwtPainter::drawLine(), QwtScaleDiv::majCnt(), QwtScaleDiv::majMark(), QwtScaleDiv::minCnt(), QwtScaleDiv::minMark(), and QwtDiMap::transform(). Referenced by QwtPlot::drawCanvasItems(). |
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Enable or disable vertical gridlines.
References gridChanged(). Referenced by QwtPlot::enableGridX(). |
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Enable or disable minor vertical gridlines.
References gridChanged(). Referenced by QwtPlot::enableGridXMin(). |
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Enable or disable horizontal gridlines.
References gridChanged(). Referenced by QwtPlot::enableGridY(). |
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Enable or disable minor horizontal gridlines.
References gridChanged(). Referenced by QwtPlot::enableGridYMin(). |
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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(). |
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Referenced by QwtPlotPrintFilter::apply(), QwtPlot::gridMajPen(), and QwtPlotPrintFilter::reset(). |
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Referenced by QwtPlotPrintFilter::apply(), QwtPlot::gridMinPen(), and QwtPlotPrintFilter::reset(). |
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Assign a pen for the major gridlines.
References gridChanged(). Referenced by QwtPlotPrintFilter::apply(), QwtPlotPrintFilter::reset(), and QwtPlot::setGridMajPen(). |
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Assign a pen for the minor gridlines.
References gridChanged(). Referenced by QwtPlotPrintFilter::apply(), QwtPlotPrintFilter::reset(), and QwtPlot::setGridMinPen(). |
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Assign a pen for both major and minor gridlines.
References gridChanged(). Referenced by QwtPlot::setGridPen(). |
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Assign an x axis scale division.
References gridChanged(). Referenced by QwtPlot::setGridXAxis(), and QwtPlot::updateAxes(). |
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Assign a y axis division.
References gridChanged(). Referenced by QwtPlot::setGridYAxis(), and QwtPlot::updateAxes(). |
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Referenced by QwtPlot::gridXEnabled(). |
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Referenced by QwtPlot::gridXMinEnabled(). |
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Referenced by QwtPlot::gridYEnabled(). |
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Referenced by QwtPlot::gridYMinEnabled(). |
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