ExpressionGraph Class Reference

Subclass this class to create graphs that display graphs of expressions. More...

#include <expressiongraph.h>

Inheritance diagram for ExpressionGraph:

[legend]Collaboration diagram for ExpressionGraph:

[legend]List of all members.


Public Slots
void	nextExpression ()
void	prevExpression ()
void	setDrawConnected (bool b)
void	setShowCurrentExpression (bool state)
void	setTrace (bool)
void	slotNextFrame ()
Signals
void	animationValueChanged (double)
Public Methods
	ExpressionGraph (QWidget parent=0, const char name=0)
	~ExpressionGraph ()
void	load_key (const char key, const char value)
void	addExpression (const Expression &)
	Adds and thus graphs the expression.
void	removeExpression (unsigned int index)
	Removes the expression at the given index.
unsigned int	getCurrentExpressionIndex ()
void	setCurrentExpressionIndex (int i)
Expression	getExpression (unsigned int i) const
unsigned int	expressionCount ()
virtual void	print (QPrinter *)
	Prints graph as is.
void	setAngle (int m)
int	getAngle () const
bool	isTracing () const
bool	isDrawConnected () const
void	exportAsImage (const QString &file, const QString &fileType)
	Saves the graph as an image.
void	getPixmap (QPixmap &pm)
void	onlyShowActive (bool b)
void	setDisplayExpressionText (bool b)
Protected Methods
virtual int	setXYForTrace (const double, const double, double , double , Expression &)
virtual void	drawExpression (QPainter *, Expression &expression)=0
void	drawExpressionAt (QPainter *painter, int i)
virtual void	putUndefinedMessage (double x, double y)
virtual unsigned int	var_count ()
virtual void	drawAfterAxis (QPainter *)
virtual const char *	independent_vars ()=0
	Returns a list of independent variables for the expression which, when there are more than one, are seperated by commas.
virtual const char *	dependent_var (int i=0)=0
	Returns the dependent variable.
virtual double	traceDepX (double d)
virtual double	traceDepY (double d)
void	reparseAll ()
FungParser *	getParsedCurrentExpression (int i=0)
	Returns a pointer to a FungParser object which has the current expression parsed.
int	parseExpression (std::string &expression, FungParser *fp, int i=0)
	Returns a pointer to a FungParser object which has the expression at the given index parsed.
bool	isValidExpression (const Expression &, std::string *errorMsg=0)
void	paintEvent (QPaintEvent *)
void	mouseMoveEvent (QMouseEvent *)
virtual void	nextFrameReady ()
	Classes that implement this class need to implement this function.
Friends
class	MathFunction

Detailed Description

Subclass this class to create graphs that display graphs of expressions.

Author:: Fungmeista

Definition at line 36 of file expressiongraph.h.

Member Function Documentation

virtual const char* ExpressionGraph::dependent_var ( int i = 0 ) [protected, pure virtual]

Returns the dependent variable.
The argument 'i' is used to get each dependent variable if there are more than one ( i.e. parametric graph ).
Implemented in DensityPlot, FunctionGraph, ParametricGraph, and PolarGraph.
Referenced by addExpression(), getParsedCurrentExpression(), parseExpression(), and removeExpression().

void ExpressionGraph::exportAsImage ( const QString & file,

const QString & fileType

) [virtual]

Saves the graph as an image.

Parameters:

filename Path plus the complete name of the image file to save to. This should include the suffix of the file name if one is desired.

suffix This specifies what type of image format export the graph as. This should be the standard file suffix of the desired image format (png, jpg, bmp, etc.).

Implements CommonGraph.
Definition at line 120 of file expressiongraph.cpp.

FungParser * ExpressionGraph::getParsedCurrentExpression ( int i = 0 ) [protected]

Returns a pointer to a FungParser object which has the current expression parsed.
This is allocated using 'new' and therefore should be deleted manually by the user.
Definition at line 419 of file expressiongraph.cpp.
References dependent_var().
Referenced by FunctionGraph::execMathFunction().

bool ExpressionGraph::isDrawConnected ( ) const [inline, virtual]

Returns :
Whether or not the graph is connecting points calculated for the value of the function.

Reimplemented from CommonGraph.
Definition at line 73 of file expressiongraph.h.

bool ExpressionGraph::isTracing ( ) const [inline, virtual]

Returns :
Whether or not tracing is active.

Reimplemented from CommonGraph.
Definition at line 70 of file expressiongraph.h.

void ExpressionGraph::nextFrameReady ( ) [protected, virtual]

Classes that implement this class need to implement this function.
This function is called everytime the next frame is ready and the subclass should implement an animation with it
Implements Animator.
Definition at line 426 of file expressiongraph.cpp.
References Animator::animatorValue().

int ExpressionGraph::parseExpression ( std::string & expression,

FungParser * fp,

int i = 0

) [protected]

Returns a pointer to a FungParser object which has the expression at the given index parsed.
This is allocated using 'new' and therefore should be deleted manually by the user.
Definition at line 378 of file expressiongraph.cpp.
References dependent_var(), independent_vars(), and FungParser::Parse().
Referenced by addExpression().

void ExpressionGraph::print ( QPrinter * ) [virtual]

Prints graph as is.
A printer setup dialog will be opened.
Reimplemented from BasicGraph.
Definition at line 137 of file expressiongraph.cpp.
References BasicGraph::backgroundColor().

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

ExpressionGraph Class Reference

Public Slots

Signals

Public Methods

Protected Methods

Friends

Detailed Description

Member Function Documentation