---
name: "QwtDoubleSize"
section: "3"
platform: "linux"
package: "libqwt-doc"
version: "4.2.0-6"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/QwtDoubleSize"
---

# QwtDoubleSize(3)

## NAME

QwtDoubleSize -

## SYNOPSIS

## Detailed Description

The QwtDoubleSize class defines a size in double coordinates

Definition at line 62 of file qwt\_double\_rect.h.

### Public Member Functions

**QwtDoubleSize** ()\
 **QwtDoubleSize** (double width, double height)\
 **QwtDoubleSize** (const QSize &)\
 bool **isNull** () const\
 bool **isEmpty** () const\
 bool **isValid** () const\
 double **width** () const\
 double **height** () const\
 void **setWidth** (double w)\
 void **setHeight** (double h)\
 void **transpose** ()\
 **QwtDoubleSize** **expandedTo** (const **QwtDoubleSize** &) const\
 **QwtDoubleSize** **boundedTo** (const **QwtDoubleSize** &) const\
 double & **rwidth** ()\
 double & **rheight** ()\
 bool **operator==** (const **QwtDoubleSize** &) const\
 bool **operator!=** (const **QwtDoubleSize** &) const\
 const **QwtDoubleSize** **operator-** () const\
 const **QwtDoubleSize** **operator+** (const **QwtDoubleSize** &) const\
 const **QwtDoubleSize** **operator-** (const **QwtDoubleSize** &) const\
 const **QwtDoubleSize** **operator \*** (double) const\
 const **QwtDoubleSize** **operator/** (double) const\
 **QwtDoubleSize** & **operator+=** (const **QwtDoubleSize** &)\
 **QwtDoubleSize** & **operator-=** (const **QwtDoubleSize** &)\
 **QwtDoubleSize** & **operator \*=** (double c)\
 **QwtDoubleSize** & **operator/=** (double c)\

## Constructor & Destructor Documentation

### QwtDoubleSize::QwtDoubleSize ()

Constructs a size with a width and height of 0.0.

Definition at line 131 of file qwt\_double\_rect.cpp.

Referenced by boundedTo(), expandedTo(), operator \*(), operator+(), operator-(), and operator/().

### QwtDoubleSize::QwtDoubleSize (double width, double height)

Constructs a size with a width w and height h.

Definition at line 139 of file qwt\_double\_rect.cpp.

### QwtDoubleSize::QwtDoubleSize (const QSize &)

Copy constructor.

Definition at line 147 of file qwt\_double\_rect.cpp.

## Member Function Documentation

### QwtDoubleSize QwtDoubleSize::boundedTo (const QwtDoubleSize & other) const

Returns a size with the minimum width and height of this size and other. Definition at line 181 of file qwt\_double\_rect.cpp.

References d\_height, d\_width, and QwtDoubleSize().

### QwtDoubleSize QwtDoubleSize::expandedTo (const QwtDoubleSize & other) const

Returns a size with the maximum width and height of this size and other. Definition at line 167 of file qwt\_double\_rect.cpp.

References d\_height, d\_width, and QwtDoubleSize().

Referenced by QwtPlotZoomer::end().

### double QwtDoubleSize::height () const

Returns the height.

Definition at line 256 of file qwt\_double\_rect.h.

Referenced by QwtPlotZoomer::begin(), and QwtDoubleRect::setSize().

### bool QwtDoubleSize::isEmpty () const

Returns TRUE if the width is \<= 0 or the height is \<= 0, otherwise FALSE. Definition at line 235 of file qwt\_double\_rect.h.

### bool QwtDoubleSize::isNull () const

Returns TRUE if the width is 0 and the height is 0; otherwise returns FALSE. Definition at line 226 of file qwt\_double\_rect.h.

### bool QwtDoubleSize::isValid () const

Returns TRUE if the width is equal to or greater than 0 and the height is equal to or greater than 0; otherwise returns FALSE. Definition at line 244 of file qwt\_double\_rect.h.

Referenced by QwtPlotZoomer::begin().

### const QwtDoubleSize QwtDoubleSize::operator \* (double) const

Returns the size formed by multiplying both components by c.

Definition at line 240 of file qwt\_double\_rect.cpp.

References QwtDoubleSize().

### bool QwtDoubleSize::operator!= (const QwtDoubleSize &) const

Returns TRUE if the size is not equal to other; otherwise returns FALSE.

Definition at line 199 of file qwt\_double\_rect.cpp.

References operator==().

### const QwtDoubleSize QwtDoubleSize::operator+ (const QwtDoubleSize & other) const

Returns the size formed by adding both components by the components of other. Each component is added separately. Definition at line 219 of file qwt\_double\_rect.cpp.

References d\_height, d\_width, and QwtDoubleSize().

### QwtDoubleSize & QwtDoubleSize::operator+= (const QwtDoubleSize &)

Adds size other to this size and returns a reference to this size.

Definition at line 254 of file qwt\_double\_rect.cpp.

References d\_height, and d\_width.

### const QwtDoubleSize QwtDoubleSize::operator- (const QwtDoubleSize & other) const

Returns the size formed by subtracting both components by the components of other. Each component is subtracted separately. Definition at line 231 of file qwt\_double\_rect.cpp.

References d\_height, d\_width, and QwtDoubleSize().

### const QwtDoubleSize QwtDoubleSize::operator- () const

Returns the size formed by changing the sign of both components, equivalent to QwtDoubleSize(-width(), -height()); Definition at line 209 of file qwt\_double\_rect.cpp.

References QwtDoubleSize().

### QwtDoubleSize & QwtDoubleSize::operator-= (const QwtDoubleSize &)

Subtracts size other from this size and returns a reference to this size.

Definition at line 263 of file qwt\_double\_rect.cpp.

References d\_height, and d\_width.

### const QwtDoubleSize QwtDoubleSize::operator/ (double) const

Returns the size formed by dividing both components by c.

Definition at line 247 of file qwt\_double\_rect.cpp.

References QwtDoubleSize().

### bool QwtDoubleSize::operator== (const QwtDoubleSize &) const

Returns TRUE if the size is equal to other; otherwise returns FALSE.

Definition at line 192 of file qwt\_double\_rect.cpp.

References d\_height, and d\_width.

Referenced by operator!=().

### double & QwtDoubleSize::rheight ()

Returns a reference to the height.

Definition at line 280 of file qwt\_double\_rect.h.

### double & QwtDoubleSize::rwidth ()

Returns a reference to the width.

Definition at line 274 of file qwt\_double\_rect.h.

### void QwtDoubleSize::setHeight (double h)

Sets the height to height.

Definition at line 268 of file qwt\_double\_rect.h.

### void QwtDoubleSize::setWidth (double w)

Sets the width to width.

Definition at line 262 of file qwt\_double\_rect.h.

### void QwtDoubleSize::transpose ()

Swaps the values of width and height.

Definition at line 155 of file qwt\_double\_rect.cpp.

### double QwtDoubleSize::width () const

Returns the width.

Definition at line 250 of file qwt\_double\_rect.h.

Referenced by QwtPlotZoomer::begin(), and QwtDoubleRect::setSize().

## Author

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