QwtPlotGrid Class Reference
A class which draws a coordinate grid. More...
#include <qwt_plot_grid.h>
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 QRect &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 QRect & | 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 | ( | bool | tf | ) |
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 | ( | bool | tf | ) |
Enable or disable minor vertical gridlines.
- Parameters:
-
tf Enable (true) or disable
- See also:
- enableX()
| void QwtPlotGrid::enableY | ( | bool | tf | ) |
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 | ( | bool | tf | ) |
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
The width of non cosmetic pens is scaled according to the resolution of the paint device.
- Parameters:
-
pen Pen
- See also:
- majPen(), setMinPen(), setPen(), QwtPainter::scaledPen()
| void QwtPlotGrid::setMinPen | ( | const QPen & | pen | ) |
Assign a pen for the minor gridlines
The width of non cosmetic pens is scaled according to the resolution of the paint device.
- Parameters:
-
pen Pen
- See also:
- minPen(), setMajPen(), setPen(), QwtPainter::scaledPen()
| void QwtPlotGrid::setPen | ( | const QPen & | pen | ) |
Assign a pen for both major and minor gridlines
The width of non cosmetic pens is scaled according to the resolution of the paint device.
- Parameters:
-
pen Pen
- See also:
- setMajPen(), setMinPen(), QwtPainter::scaledPen()
| 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
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