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Qwt User's Guide
6.2.0
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A class which draws a coordinate grid. More...
#include <qwt_plot_grid.h>
Public Member Functions | |
| QwtPlotGrid () | |
| Enables major grid, disables minor grid. | |
| virtual | ~QwtPlotGrid () |
| Destructor. | |
| virtual int | rtti () const override |
| void | enableX (bool) |
| Enable or disable vertical grid lines. More... | |
| bool | xEnabled () const |
| void | enableY (bool) |
| Enable or disable horizontal grid lines. More... | |
| bool | yEnabled () const |
| void | enableXMin (bool) |
| Enable or disable minor vertical grid lines. More... | |
| bool | xMinEnabled () const |
| void | enableYMin (bool) |
| Enable or disable minor horizontal grid lines. More... | |
| bool | yMinEnabled () const |
| void | setXDiv (const QwtScaleDiv &) |
| const QwtScaleDiv & | xScaleDiv () const |
| void | setYDiv (const QwtScaleDiv &) |
| const QwtScaleDiv & | yScaleDiv () const |
| void | setPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine) |
| void | setPen (const QPen &) |
| void | setMajorPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine) |
| void | setMajorPen (const QPen &) |
| const QPen & | majorPen () const |
| void | setMinorPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine) |
| void | setMinorPen (const QPen &) |
| const QPen & | minorPen () const |
| virtual void | draw (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect) const override |
| Draw the grid. More... | |
| virtual void | updateScaleDiv (const QwtScaleDiv &xScaleDiv, const QwtScaleDiv &yScaleDiv) override |
Public Member Functions inherited from QwtPlotItem | |
| QwtPlotItem () | |
| QwtPlotItem (const QString &title) | |
| QwtPlotItem (const QwtText &title) | |
| virtual | ~QwtPlotItem () |
| Destroy the QwtPlotItem. | |
| void | attach (QwtPlot *plot) |
| Attach the item to a plot. More... | |
| void | detach () |
| This method detaches a QwtPlotItem from any QwtPlot it has been associated with. More... | |
| QwtPlot * | plot () const |
| Return attached plot. | |
| void | setTitle (const QString &title) |
| void | setTitle (const QwtText &title) |
| const QwtText & | title () const |
| void | setItemAttribute (ItemAttribute, bool on=true) |
| bool | testItemAttribute (ItemAttribute) const |
| void | setItemInterest (ItemInterest, bool on=true) |
| bool | testItemInterest (ItemInterest) const |
| void | setRenderHint (RenderHint, bool on=true) |
| bool | testRenderHint (RenderHint) const |
| void | setRenderThreadCount (uint numThreads) |
| uint | renderThreadCount () const |
| void | setLegendIconSize (const QSize &) |
| QSize | legendIconSize () const |
| double | z () const |
| void | setZ (double z) |
| Set the z value. More... | |
| void | show () |
| Show the item. | |
| void | hide () |
| Hide the item. | |
| virtual void | setVisible (bool) |
| bool | isVisible () const |
| void | setAxes (QwtAxisId xAxis, QwtAxisId yAxis) |
| void | setXAxis (QwtAxisId) |
| QwtAxisId | xAxis () const |
| Return xAxis. | |
| void | setYAxis (QwtAxisId) |
| QwtAxisId | yAxis () const |
| Return yAxis. | |
| virtual void | itemChanged () |
| virtual void | legendChanged () |
| virtual QRectF | boundingRect () const |
| virtual void | getCanvasMarginHint (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, double &left, double &top, double &right, double &bottom) const |
| Calculate a hint for the canvas margin. More... | |
| virtual void | updateLegend (const QwtPlotItem *, const QList< QwtLegendData > &) |
| Update the item to changes of the legend info. More... | |
| QRectF | scaleRect (const QwtScaleMap &, const QwtScaleMap &) const |
| Calculate the bounding scale rectangle of 2 maps. More... | |
| QRectF | paintRect (const QwtScaleMap &, const QwtScaleMap &) const |
| Calculate the bounding paint rectangle of 2 maps. More... | |
| virtual QList< QwtLegendData > | legendData () const |
| Return all information, that is needed to represent the item on the legend. More... | |
| virtual QwtGraphic | legendIcon (int index, const QSizeF &) const |
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 grid lines. The locations of the grid lines 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.
Definition at line 33 of file qwt_plot_grid.h.
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overridevirtual |
Draw the grid.
The grid is drawn into the bounding rectangle such that grid lines 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.
| painter | Painter |
| xMap | X axis map |
| yMap | Y axis |
| canvasRect | Contents rectangle of the plot canvas |
Implements QwtPlotItem.
Definition at line 282 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::enableX | ( | bool | on | ) |
Enable or disable vertical grid lines.
| on | Enable (true) or disable |
Definition at line 76 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::enableXMin | ( | bool | on | ) |
Enable or disable minor vertical grid lines.
| on | Enable (true) or disable |
Definition at line 108 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::enableY | ( | bool | on | ) |
Enable or disable horizontal grid lines.
| on | Enable (true) or disable |
Definition at line 92 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::enableYMin | ( | bool | on | ) |
Enable or disable minor horizontal grid lines.
| on | Enable (true) or disable |
Definition at line 124 of file qwt_plot_grid.cpp.
| const QPen & QwtPlotGrid::majorPen | ( | ) | const |
Definition at line 367 of file qwt_plot_grid.cpp.
| const QPen & QwtPlotGrid::minorPen | ( | ) | const |
Definition at line 376 of file qwt_plot_grid.cpp.
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overridevirtual |
Reimplemented from QwtPlotItem.
Definition at line 64 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::setMajorPen | ( | const QColor & | color, |
| qreal | width = 0.0, |
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| Qt::PenStyle | style = Qt::SolidLine |
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| ) |
Build and assign a pen for both major grid lines
In Qt5 the default pen width is 1.0 ( 0.0 in Qt4 ) what makes it non cosmetic ( see QPen::isCosmetic() ). This method has been introduced to hide this incompatibility.
| color | Pen color |
| width | Pen width |
| style | Pen style |
Definition at line 212 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::setMajorPen | ( | const QPen & | pen | ) |
Assign a pen for the major grid lines
| pen | Pen |
Definition at line 223 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::setMinorPen | ( | const QColor & | color, |
| qreal | width = 0.0, |
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| Qt::PenStyle | style = Qt::SolidLine |
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| ) |
Build and assign a pen for the minor grid lines
In Qt5 the default pen width is 1.0 ( 0.0 in Qt4 ) what makes it non cosmetic ( see QPen::isCosmetic() ). This method has been introduced to hide this incompatibility.
| color | Pen color |
| width | Pen width |
| style | Pen style |
Definition at line 247 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::setMinorPen | ( | const QPen & | pen | ) |
Assign a pen for the minor grid lines
| pen | Pen |
Definition at line 258 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::setPen | ( | const QColor & | color, |
| qreal | width = 0.0, |
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| Qt::PenStyle | style = Qt::SolidLine |
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| ) |
Build and assign a pen for both major and minor grid lines
In Qt5 the default pen width is 1.0 ( 0.0 in Qt4 ) what makes it non cosmetic ( see QPen::isCosmetic() ). This method has been introduced to hide this incompatibility.
| color | Pen color |
| width | Pen width |
| style | Pen style |
Definition at line 176 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::setPen | ( | const QPen & | pen | ) |
Assign a pen for both major and minor grid lines
| pen | Pen |
Definition at line 187 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::setXDiv | ( | const QwtScaleDiv & | scaleDiv | ) |
Assign an x axis scale division
| scaleDiv | Scale division |
Definition at line 140 of file qwt_plot_grid.cpp.
| void QwtPlotGrid::setYDiv | ( | const QwtScaleDiv & | scaleDiv | ) |
Assign a y axis division
| scaleDiv | Scale division |
Definition at line 154 of file qwt_plot_grid.cpp.
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overridevirtual |
Update the grid to changes of the axes scale division
| xScaleDiv | Scale division of the x-axis |
| yScaleDiv | Scale division of the y-axis |
Reimplemented from QwtPlotItem.
Definition at line 438 of file qwt_plot_grid.cpp.
| bool QwtPlotGrid::xEnabled | ( | ) | const |
Definition at line 385 of file qwt_plot_grid.cpp.
| bool QwtPlotGrid::xMinEnabled | ( | ) | const |
Definition at line 394 of file qwt_plot_grid.cpp.
| const QwtScaleDiv & QwtPlotGrid::xScaleDiv | ( | ) | const |
Definition at line 419 of file qwt_plot_grid.cpp.
| bool QwtPlotGrid::yEnabled | ( | ) | const |
Definition at line 403 of file qwt_plot_grid.cpp.
| bool QwtPlotGrid::yMinEnabled | ( | ) | const |
Definition at line 412 of file qwt_plot_grid.cpp.
| const QwtScaleDiv & QwtPlotGrid::yScaleDiv | ( | ) | const |
Definition at line 425 of file qwt_plot_grid.cpp.