qwt_double_rect.cpp

/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#include <qglobal.h>

#if QT_VERSION < 0x040000

#include "qwt_math.h"
#include "qwt_double_rect.h"

QwtDoublePoint::QwtDoublePoint():
    d_x(0.0),
    d_y(0.0)
{
}

QwtDoublePoint::QwtDoublePoint(double x, double y ):
    d_x(x),
    d_y(y)
{
}

QwtDoublePoint::QwtDoublePoint(const QPoint &p):
    d_x(double(p.x())),
    d_y(double(p.y()))
{
}

bool QwtDoublePoint::operator==(const QwtDoublePoint &other) const
{
    return (d_x == other.d_x) && (d_y == other.d_y);
}

bool QwtDoublePoint::operator!=(const QwtDoublePoint &other) const
{
    return !operator==(other);
}

const QwtDoublePoint QwtDoublePoint::operator-() const
{
    return QwtDoublePoint(-d_x, -d_y);
}

const QwtDoublePoint QwtDoublePoint::operator+(
    const QwtDoublePoint &other) const
{
    return QwtDoublePoint(d_x + other.d_x, d_y + other.d_y);
}

const QwtDoublePoint QwtDoublePoint::operator-(
    const QwtDoublePoint &other) const
{
    return QwtDoublePoint(d_x - other.d_x, d_y - other.d_y);
}

const QwtDoublePoint QwtDoublePoint::operator*(double factor) const
{
    return QwtDoublePoint(d_x * factor, d_y * factor);
}

const QwtDoublePoint QwtDoublePoint::operator/(double factor) const
{
    return QwtDoublePoint(d_x / factor, d_y / factor);
}

QwtDoublePoint &QwtDoublePoint::operator+=(const QwtDoublePoint &other)
{
    d_x += other.d_x;
    d_y += other.d_y;
    return *this;
}

QwtDoublePoint &QwtDoublePoint::operator-=(const QwtDoublePoint &other)
{
    d_x -= other.d_x;
    d_y -= other.d_y;
    return *this;
}

QwtDoublePoint &QwtDoublePoint::operator*=(double factor)
{
    d_x *= factor;
    d_y *= factor;
    return *this;
}

QwtDoublePoint &QwtDoublePoint::operator/=(double factor)
{
    d_x /= factor;
    d_y /= factor;
    return *this;
}

QwtDoubleSize::QwtDoubleSize():
    d_width(-1.0),
    d_height(-1.0)
{   
}   

QwtDoubleSize::QwtDoubleSize( double width, double height ):
    d_width(width),
    d_height(height)
{   
}   

QwtDoubleSize::QwtDoubleSize(const QSize &sz):
    d_width(double(sz.width())),
    d_height(double(sz.height()))
{   
}   

void QwtDoubleSize::transpose()
{   
    double tmp = d_width;
    d_width = d_height;
    d_height = tmp;
}

QwtDoubleSize QwtDoubleSize::expandedTo(
    const QwtDoubleSize &other) const
{   
    return QwtDoubleSize(
        qwtMax(d_width, other.d_width),
        qwtMax(d_height, other.d_height)
    );  
}   

QwtDoubleSize QwtDoubleSize::boundedTo(
    const QwtDoubleSize &other) const
{   
    return QwtDoubleSize(
        qwtMin(d_width, other.d_width),
        qwtMin(d_height, other.d_height)
    );  
}   

bool QwtDoubleSize::operator==(const QwtDoubleSize &other) const
{ 
    return d_width == other.d_width && d_height == other.d_height;
}   

bool QwtDoubleSize::operator!=(const QwtDoubleSize &other) const
{ 
    return !operator==(other);
}   

const QwtDoubleSize QwtDoubleSize::operator+(
    const QwtDoubleSize &other) const
{   
    return QwtDoubleSize(d_width + other.d_width,
        d_height + other.d_height); 
}       

const QwtDoubleSize QwtDoubleSize::operator-(
    const QwtDoubleSize &other) const
{   
    return QwtDoubleSize(d_width - other.d_width,
        d_height - other.d_height); 
}       

const QwtDoubleSize QwtDoubleSize::operator*(double c) const
{ 
    return QwtDoubleSize(d_width * c, d_height * c);
}   

const QwtDoubleSize QwtDoubleSize::operator/(double c) const
{ 
    return QwtDoubleSize(d_width / c, d_height / c);
}   

QwtDoubleSize &QwtDoubleSize::operator+=(const QwtDoubleSize &other)
{   
    d_width += other.d_width; 
    d_height += other.d_height;
    return *this;
}

QwtDoubleSize &QwtDoubleSize::operator-=(const QwtDoubleSize &other)
{   
    d_width -= other.d_width; 
    d_height -= other.d_height;
    return *this;
}

/* 
  Multiplies this size's width and height by c, 
  and returns a reference to this size.
*/
QwtDoubleSize &QwtDoubleSize::operator*=(double c)
{   
    d_width *= c; 
    d_height *= c;
    return *this;
}

/* 
  Devides this size's width and height by c, 
  and returns a reference to this size.
*/
QwtDoubleSize &QwtDoubleSize::operator/=(double c)
{
    d_width /= c;
    d_height /= c;
    return *this;
}   

QwtDoubleRect::QwtDoubleRect():
    d_left(0.0),
    d_right(0.0),
    d_top(0.0),
    d_bottom(0.0)
{
}

QwtDoubleRect::QwtDoubleRect(double left, double top,
        double width, double height):
    d_left(left),
    d_right(left + width),
    d_top(top),
    d_bottom(top + height)
{
}

QwtDoubleRect::QwtDoubleRect(
        const QwtDoublePoint &p, const QwtDoubleSize &size):
    d_left(p.x()),
    d_right(p.x() + size.width()),
    d_top(p.y()),
    d_bottom(p.y() + size.height())
{
}

void QwtDoubleRect::setRect(double left, double top, 
    double width, double height)
{
    d_left = left;
    d_right = left + width;
    d_top = top;
    d_bottom = top + height;
}

void QwtDoubleRect::setSize(const QwtDoubleSize &size)
{
    setWidth(size.width());
    setHeight(size.height());
}

QwtDoubleRect QwtDoubleRect::normalized() const
{
    QwtDoubleRect r;
    if ( d_right < d_left ) 
    {
        r.d_left = d_right;
        r.d_right = d_left;
    } 
    else 
    {
        r.d_left = d_left;
        r.d_right = d_right; 
    }
    if ( d_bottom < d_top ) 
    { 
        r.d_top = d_bottom; 
        r.d_bottom = d_top;
    } 
    else 
    {
        r.d_top = d_top;
        r.d_bottom = d_bottom;
    }
    return r;
}

QwtDoubleRect QwtDoubleRect::unite(const QwtDoubleRect &other) const
{
    return *this | other;
}

QwtDoubleRect QwtDoubleRect::intersect(const QwtDoubleRect &other) const
{
    return *this & other;
}

bool QwtDoubleRect::intersects(const QwtDoubleRect &other) const
{
    return ( qwtMax(d_left, other.d_left) <= qwtMin(d_right, other.d_right) ) &&
         ( qwtMax(d_top, other.d_top ) <= qwtMin(d_bottom, other.d_bottom) );
}

bool QwtDoubleRect::operator==(const QwtDoubleRect &other) const
{
    return d_left == other.d_left && d_right == other.d_right && 
        d_top == other.d_top && d_bottom == other.d_bottom;
}

bool QwtDoubleRect::operator!=(const QwtDoubleRect &other) const
{
    return !operator==(other);
}

QwtDoubleRect QwtDoubleRect::operator|(const QwtDoubleRect &other) const
{
    if ( isEmpty() ) 
        return other;

    if ( other.isEmpty() ) 
        return *this;
        
    const double minX = qwtMin(d_left, other.d_left);
    const double maxX = qwtMax(d_right, other.d_right);
    const double minY = qwtMin(d_top, other.d_top);
    const double maxY = qwtMax(d_bottom, other.d_bottom);

    return QwtDoubleRect(minX, minY, maxX - minX, maxY - minY);
}

QwtDoubleRect QwtDoubleRect::operator&(const QwtDoubleRect &other) const
{
    if (isNull() || other.isNull())
        return QwtDoubleRect();

    const QwtDoubleRect r1 = normalized();
    const QwtDoubleRect r2 = other.normalized();

    const double minX = qwtMax(r1.left(), r2.left());
    const double maxX = qwtMin(r1.right(), r2.right());
    const double minY = qwtMax(r1.top(), r2.top());
    const double maxY = qwtMin(r1.bottom(), r2.bottom());

    return QwtDoubleRect(minX, minY, maxX - minX, maxY - minY);
}

QwtDoubleRect &QwtDoubleRect::operator|=(const QwtDoubleRect &other)
{
    *this = *this | other;
    return *this;
}

QwtDoubleRect &QwtDoubleRect::operator&=(const QwtDoubleRect &other)
{
    *this = *this & other;
    return *this;
}

QwtDoublePoint QwtDoubleRect::center() const
{
    return QwtDoublePoint(d_left + (d_right - d_left) / 2.0, 
        d_top + (d_bottom - d_top) / 2.0);
}

bool QwtDoubleRect::contains(double x, double y, bool proper) const
{
    if ( proper )
        return x > d_left && x < d_right && y > d_top && y < d_bottom;
    else
        return x >= d_left && x <= d_right && y >= d_top && y <= d_bottom;
}

bool QwtDoubleRect::contains(const QwtDoublePoint &p, bool proper) const
{
    return contains(p.x(), p.y(), proper);
}

bool QwtDoubleRect::contains(const QwtDoubleRect &other, bool proper) const
{
    return contains(other.d_left, other.d_top, proper) && 
        contains(other.d_right, other.d_bottom, proper);
}

void QwtDoubleRect::moveLeft(double x)
{
    const double w = width();
    d_left = x;
    d_right = d_left + w;
}

void QwtDoubleRect::moveRight(double x)
{
    const double w = width();
    d_right = x;
    d_left = d_right - w;
}

void QwtDoubleRect::moveTop(double y)
{
    const double h = height();
    d_top = y;
    d_bottom = d_top + h;
}

void QwtDoubleRect::moveBottom(double y)
{
    const double h = height();
    d_bottom = y;
    d_top = d_bottom - h;
}

void QwtDoubleRect::moveTo(double x, double y)
{
    moveLeft(x);
    moveTop(y);
}

void QwtDoubleRect::moveBy(double dx, double dy)
{
    d_left += dx;
    d_right += dx;
    d_top += dy;
    d_bottom += dy;
}

void QwtDoubleRect::moveCenter(const QwtDoublePoint &pos)
{
    moveCenter(pos.x(), pos.y());
}

void QwtDoubleRect::moveCenter(double x, double y)
{
    moveTo(x - width() / 2.0, y - height() / 2.0);
}

#endif // QT_VERSION < 0x040000

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