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/***************************************************************************
Curve.h - curve consisting of points
-------------------
begin : Jan 20 2001
copyright : (C) 2001 by Thomas Eschenbacher
email : Thomas Eschenbacher <thomas.eschenbacher@gmx.de>
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef CURVE_H
#define CURVE_H
#include "config.h"
#include "libkwave_export.h"
#include <QtGlobal>
#include <QList>
#include <QListIterator>
#include <QMutableListIterator>
#include <QObject>
#include <QPointF>
#include <QString>
#include <QVector>
#include <QtGlobal>
#include "libkwave/Interpolation.h"
namespace Kwave
{
class LIBKWAVE_EXPORT Curve: public QList<QPointF>
{
public:
/** Iterator */
typedef QListIterator<QPointF> ConstIterator;
/** Iterator */
typedef QMutableListIterator<QPointF> Iterator;
/** class used for the points */
typedef QPointF Point;
/** used for the "invalid" point */
static QPointF NoPoint;
/**
* Default constructor, creates an empty curve.
*/
Curve();
/**
* Constructor, creates a curve from a command string.
* @param command string with parameters
*/
explicit Curve(const QString &command);
/** Destructor */
virtual ~Curve();
/** Moves all current points into the left half */
void firstHalf();
/** Moves all current points into the right half */
void secondHalf();
/**
* Removes and deletes a point from the curve. Note that after this
* call the passed point is no longer valid!
* @param p point to be deleted
* @param check if true, the last or first point will not be deleted
*/
void deletePoint(Point p, bool check);
/**
* Deletes every second point.
*/
void deleteSecondPoint();
/**
* Flips/mirrors the curve horizontally (x-axis).
*/
void HFlip();
/**
* Flips/mirrors the curve vertically (y-axis).
*/
void VFlip();
/**
* Scales the curve vertically to fit into a range of (+/- range/2)
* on the y-axis.
* @param range the size range to use for scaling
*/
void scaleFit(unsigned int range = 1024);
/**
* Creates a new point and inserts it into the curve. The new
* point will be sorted in by it's x coordinate.
* @param x coordinate on the x axis, should be [0...+1.0]
* @param y coordinate on the y axis, should be [0...+1.0]
*/
void insert(double x, double y);
/**
* Searches for a point at given coordinates with a definable
* tolerance.
* @param x coordinate on the x axis
* @param y coordinate on the y axis
* @param tol tolerance for x and y direction, absolute value
* @return pointer to the found point or "NoPoint" if nothing found.
*/
Point findPoint(double x, double y, double tol = .05);
/**
* Sets a curve from a command string. Opposite of getCommand().
* @param command a string that contains the interpolation
* type and pairs of x/y coordinates.
*/
void fromCommand(const QString &command);
/**
* Returns a command string out of the curve points and
* interpolation type.
*/
QString getCommand();
/**
* Returns the interpolation type.
*/
Kwave::interpolation_t interpolationType();
/**
* Sets a new interpolation type.
* @param type the new interpolation type
*/
void setInterpolationType(Kwave::interpolation_t type);
/** Returns a reference to the Interpolation object itself */
Kwave::Interpolation &interpolation();
/**
* Returns an array of points, calculated out of the
* current interpolation parameters.
* @param points number of points
* @return Array of interpolated values or null if the
* number of points was zero or the curve was empty.
*/
QVector<double> interpolation(unsigned int points);
protected:
/** sorts the list by ascending x coordinate */
void sort();
private:
/** interpolation object */
Kwave::Interpolation m_interpolation;
};
}
#endif /* CURVE_H */
//***************************************************************************
//***************************************************************************
|
