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QCPAxisTickerText Class Reference

Specialized axis ticker which allows arbitrary labels at specified coordinates. More...

Inheritance diagram for QCPAxisTickerText:
Inheritance graph

Public Functions

 QCPAxisTickerText ()
 
QMap< double, QString > & ticks ()
 
int subTickCount () const
 
void setTicks (const QMap< double, QString > &ticks)
 
void setTicks (const QVector< double > &positions, const QVector< QString > labels)
 
void setSubTickCount (int subTicks)
 
void clear ()
 
void addTick (double position, QString label)
 
void addTicks (const QMap< double, QString > &ticks)
 
void addTicks (const QVector< double > &positions, const QVector< QString > &labels)
 
- Public Functions inherited from QCPAxisTicker
 QCPAxisTicker ()
 
TickStepStrategy tickStepStrategy () const
 
int tickCount () const
 
double tickOrigin () const
 
void setTickStepStrategy (TickStepStrategy strategy)
 
void setTickCount (int count)
 
void setTickOrigin (double origin)
 
virtual void generate (const QCPRange &range, const QLocale &locale, QChar formatChar, int precision, QVector< double > &ticks, QVector< double > *subTicks, QVector< QString > *tickLabels)
 

Protected Functions

virtual double getTickStep (const QCPRange &range)
 
virtual int getSubTickCount (double tickStep)
 
virtual QString getTickLabel (double tick, const QLocale &locale, QChar formatChar, int precision)
 
virtual QVector< double > createTickVector (double tickStep, const QCPRange &range)
 
- Protected Functions inherited from QCPAxisTicker
virtual QVector< double > createSubTickVector (int subTickCount, const QVector< double > &ticks)
 
virtual QVector< QString > createLabelVector (const QVector< double > &ticks, const QLocale &locale, QChar formatChar, int precision)
 
void trimTicks (const QCPRange &range, QVector< double > &ticks, bool keepOneOutlier) const
 
double pickClosest (double target, const QVector< double > &candidates) const
 
double getMantissa (double input, double *magnitude=0) const
 
double cleanMantissa (double input) const
 

Additional Inherited Members

- Public Types inherited from QCPAxisTicker
enum  TickStepStrategy
 

Detailed Description

Specialized axis ticker which allows arbitrary labels at specified coordinates.

axisticker-text.png

This QCPAxisTicker subclass generates ticks which can be directly specified by the user as coordinates and associated strings. They can be passed as a whole with setTicks or one at a time with addTick. Alternatively you can directly access the internal storage via ticks and modify the tick/label data there.

This is useful for cases where the axis represents categories rather than numerical values.

If you are updating the ticks of this ticker regularly and in a dynamic fasion (e.g. dependent on the axis range), it is a sign that you should probably create an own ticker by subclassing QCPAxisTicker, instead of using this one.

The ticker can be created and assigned to an axis like this:

QSharedPointer<QCPAxisTickerText> textTicker(new QCPAxisTickerText);
customPlot->xAxis->setTicker(textTicker);
textTicker->addTick(1.0, "Bacteria");
textTicker->addTick(2.0, "Protozoa");
textTicker->addTick(3.0, "Chromista");
textTicker->addTick(4.0, "Plants");
textTicker->addTick(5.0, "Fungi");
textTicker->addTick(6.0, "Animals");
textTicker->addTick(8.0, "Vogons");

Constructor & Destructor Documentation

§ QCPAxisTickerText()

QCPAxisTickerText::QCPAxisTickerText ( )

Constructs the ticker and sets reasonable default values. Axis tickers are commonly created managed by a QSharedPointer, which then can be passed to QCPAxis::setTicker.

Member Function Documentation

§ ticks()

QMap< double, QString > & QCPAxisTickerText::ticks ( )
inline

Returns a non-const reference to the internal map which stores the tick coordinates and their labels.

You can access the map directly in order to add, remove or manipulate ticks, as an alternative to using the methods provided by QCPAxisTickerText, such as setTicks and addTick.

§ setTicks() [1/2]

void QCPAxisTickerText::setTicks ( const QMap< double, QString > &  ticks)

This is an overloaded function.

Sets the ticks that shall appear on the axis. The map key of ticks corresponds to the axis coordinate, and the map value is the string that will appear as tick label.

An alternative to manipulate ticks is to directly access the internal storage with the ticks getter.

See also
addTicks, addTick, clear

§ setTicks() [2/2]

void QCPAxisTickerText::setTicks ( const QVector< double > &  positions,
const QVector< QString >  labels 
)

This is an overloaded function.

Sets the ticks that shall appear on the axis. The entries of positions correspond to the axis coordinates, and the entries of labels are the respective strings that will appear as tick labels.

See also
addTicks, addTick, clear

§ setSubTickCount()

void QCPAxisTickerText::setSubTickCount ( int  subTicks)

Sets the number of sub ticks that shall appear between ticks. For QCPAxisTickerText, there is no automatic sub tick count calculation. So if sub ticks are needed, they must be configured with this method.

§ clear()

void QCPAxisTickerText::clear ( )

Clears all ticks.

An alternative to manipulate ticks is to directly access the internal storage with the ticks getter.

See also
setTicks, addTicks, addTick

§ addTick()

void QCPAxisTickerText::addTick ( double  position,
QString  label 
)

Adds a single tick to the axis at the given axis coordinate position, with the provided tick label.

See also
addTicks, setTicks, clear

§ addTicks() [1/2]

void QCPAxisTickerText::addTicks ( const QMap< double, QString > &  ticks)

This is an overloaded function.

Adds the provided ticks to the ones already existing. The map key of ticks corresponds to the axis coordinate, and the map value is the string that will appear as tick label.

An alternative to manipulate ticks is to directly access the internal storage with the ticks getter.

See also
addTick, setTicks, clear

§ addTicks() [2/2]

void QCPAxisTickerText::addTicks ( const QVector< double > &  positions,
const QVector< QString > &  labels 
)

This is an overloaded function.

Adds the provided ticks to the ones already existing. The entries of positions correspond to the axis coordinates, and the entries of labels are the respective strings that will appear as tick labels.

An alternative to manipulate ticks is to directly access the internal storage with the ticks getter.

See also
addTick, setTicks, clear

§ getTickStep()

double QCPAxisTickerText::getTickStep ( const QCPRange range)
protectedvirtual

Since the tick coordinates are provided externally, this method implementation does nothing.

For general information about this virtual method, see the base class implementation.

Reimplemented from QCPAxisTicker.

§ getSubTickCount()

int QCPAxisTickerText::getSubTickCount ( double  tickStep)
protectedvirtual

Returns the sub tick count that was configured with setSubTickCount.

For general information about this virtual method, see the base class implementation.

Reimplemented from QCPAxisTicker.

§ getTickLabel()

QString QCPAxisTickerText::getTickLabel ( double  tick,
const QLocale &  locale,
QChar  formatChar,
int  precision 
)
protectedvirtual

Returns the tick label which corresponds to the key tick in the internal tick storage. Since the labels are provided externally, locale, formatChar, and precision are ignored.

For general information about this virtual method, see the base class implementation.

Reimplemented from QCPAxisTicker.

§ createTickVector()

QVector< double > QCPAxisTickerText::createTickVector ( double  tickStep,
const QCPRange range 
)
protectedvirtual

Returns the externally provided tick coordinates which are in the specified range. If available, one tick above and below the range is provided in addition, to allow possible sub tick calculation. The parameter tickStep is ignored.

For general information about this virtual method, see the base class implementation.

Reimplemented from QCPAxisTicker.


The documentation for this class was generated from the following files: