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DefiniteIntegralFunction Class Reference

BasicGraph uses this to calculate the definite integral of a function. More...

#include <definiteintegralfunction.h>

Inheritance diagram for DefiniteIntegralFunction:

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List of all members.

Public Methods

 DefiniteIntegralFunction (BasicGraph *=0, int expression_count=0, double precision=0.5)
 ~DefiniteIntegralFunction ()

Protected Methods

void calculate_and_draw (QPainter *)
 When creating a math function subclass, overwrite this function to calculate and then draw whatever visual you wish using the given QPainter.

void draw_stored (QPainter *)
 When creating a math function subclass, overwrite this function with a function to more quickly draw the result of the function.

Detailed Description

BasicGraph uses this to calculate the definite integral of a function.

Author:
Fungmeista
Note:
This numerically calculates the definite integral using the Trapazoid Rule. This means that for non-continuous functions it will not return correct values for the definite integral since it is not defined.

Definition at line 33 of file definiteintegralfunction.h.

Member Function Documentation

void DefiniteIntegralFunction::calculate_and_draw (  QPainter *    painter )  [protected, virtual]
 

When creating a math function subclass, overwrite this function to calculate and then draw whatever visual you wish using the given QPainter.

You should also call the function setResult() inside this function and pass to it a string that you wish to be displayed as the result of the function.

Reimplemented from MathFunction.

Definition at line 39 of file definiteintegralfunction.cpp.

References draw_stored(), MathFunction::expression, MathFunction::setResult(), MathFunction::toGraphXCoord(), and MathFunction::toPixelYCoord().

void DefiniteIntegralFunction::draw_stored (  QPainter *    painter )  [protected, virtual]
 

When creating a math function subclass, overwrite this function with a function to more quickly draw the result of the function.

For example, if calculate_and_draw calculates many points, these can be saved and drawn in draw_stored instead of recalculating them.

Reimplemented from MathFunction.

Definition at line 73 of file definiteintegralfunction.cpp.

Referenced by calculate_and_draw().

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