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# ipe::Attribute Class Reference
Ipe Attributes

An attribute of an Ipe Object. More...

`#include <ipeattributes.h>`

List of all members.

## Public Member Functions

- Attribute ()
- Attribute (bool symbolic, String name)
- Attribute (Fixed value)
- Attribute (Color color)
- Attribute (THorizontalAlignment align)
- Attribute (TVerticalAlignment align)
- Attribute (TLineJoin join)
- Attribute (TLineCap cap)
- Attribute (TFillRule rule)
- Attribute (TPinned pin)
- Attribute (TTransformations trans)
- Attribute (TPathMode pm)
- bool isSymbolic () const
- bool isString () const
- bool isColor () const
- bool isNumber () const
- bool isEnum () const
- bool isBoolean () const
- bool isNormal () const
- int index () const
- int internal () const
- String string () const
- Fixed number () const
- Color color () const
- bool boolean () const
- THorizontalAlignment horizontalAlignment () const
- TVerticalAlignment verticalAlignment () const
- TLineJoin lineJoin () const
- TLineCap lineCap () const
- TFillRule fillRule () const
- TPinned pinned () const
- TTransformations transformations () const
- TPathMode pathMode () const
- bool operator== (const Attribute &rhs) const
- bool operator!= (const Attribute &rhs) const

## Static Public Member Functions

- static Attribute Boolean (bool flag)
- static Attribute BLACK ()
- static Attribute WHITE ()
- static Attribute ONE ()
- static Attribute NORMAL ()
- static Attribute UNDEFINED ()
- static Attribute BACKGROUND ()
- static Attribute SYM_STROKE ()
- static Attribute SYM_FILL ()
- static Attribute SYM_PEN ()
- static Attribute ARROW_NORMAL ()
- static Attribute OPAQUE ()
- static Attribute ARROW_ARC ()
- static Attribute ARROW_FARC ()
- static Attribute makeColor (String str, Attribute deflt)
- static Attribute makeScalar (String str, Attribute deflt)
- static Attribute makeDashStyle (String str)
- static Attribute makeTextSize (String str)
- static Attribute normal (Kind kind)

## Friends

- class StyleSheet

## Detailed Description

An attribute of an Ipe Object.

An attribute is either an absolute value or a symbolic name that has to be looked up in a StyleSheet.

All string values are replaced by indices into a Repository (that applies both to symbolic names and to absolute values that are strings). All other values are stored directly inside the attribute, either as a Fixed or a Color.

There are five different kinds of Attribute objects:

- if isSymbolic() is true, index() returns the index into the repository, and string() returns the symbolic name.
- if isColor() is true, color() returns an absolute RGB color.
- if isNumeric() is true, number() returns an absolute scalar value.
- if isEnum() is true, the attribute represents an enumeration value.
- otherwise, isString() is true, and index() returns the index into the repository (for a string expressing the absolute value of the attribute), and string() returns the string itself.

## Constructor & Destructor Documentation

ipe::Attribute::Attribute | ( |  | ) | `[inline, explicit]`

Default constructor.

Attribute::Attribute | ( | bool | symbolic,
|  | String | name
| ) |  | `[explicit]`

Create an attribute with string value.

Attribute::Attribute | ( | Fixed | value | ) | `[explicit]`

Create an absolute numeric attribute.

Attribute::Attribute | ( | Color | color | ) | `[explicit]`

Create an attribute with absolute color.

ipe::Attribute::Attribute | ( | THorizontalAlignment | align | ) | `[inline, explicit]`

ipe::Attribute::Attribute | ( | TVerticalAlignment | align | ) | `[inline, explicit]`

ipe::Attribute::Attribute | ( | TLineJoin | join | ) | `[inline, explicit]`

ipe::Attribute::Attribute | ( | TLineCap | cap | ) | `[inline, explicit]`

ipe::Attribute::Attribute | ( | TFillRule | rule | ) | `[inline, explicit]`

ipe::Attribute::Attribute | ( | TPinned | pin | ) | `[inline, explicit]`

ipe::Attribute::Attribute | ( | TTransformations | trans | ) | `[inline, explicit]`

ipe::Attribute::Attribute | ( | TPathMode | pm | ) | `[inline, explicit]`

## Member Function Documentation

static Attribute ipe::Attribute::Boolean | ( | bool | flag | ) | `[inline, static]`

bool ipe::Attribute::isSymbolic | ( |  | ) | const`[inline]`

Is it symbolic?

bool ipe::Attribute::isString | ( |  | ) | const`[inline]`

Is it an absolute string value?

bool ipe::Attribute::isColor | ( |  | ) | const`[inline]`

Is it a color?

bool ipe::Attribute::isNumber | ( |  | ) | const`[inline]`

Is it a number?

bool ipe::Attribute::isEnum | ( |  | ) | const`[inline]`

Is it an enumeration?

bool ipe::Attribute::isBoolean | ( |  | ) | const`[inline]`

Is it a boolean?

bool ipe::Attribute::isNormal | ( |  | ) | const`[inline]`

Is it the symbolic name "normal"?

int ipe::Attribute::index | ( |  | ) | const`[inline]`

Return index into Repository.

int ipe::Attribute::internal | ( |  | ) | const`[inline]`

String Attribute::string | ( |  | ) | const

Return string representing the attribute.

Fixed Attribute::number | ( |  | ) | const

Return value of absolute numeric attribute.

Color Attribute::color | ( |  | ) | const

Return absolute color.

bool ipe::Attribute::boolean | ( |  | ) | const`[inline]`

THorizontalAlignment ipe::Attribute::horizontalAlignment | ( |  | ) | const`[inline]`

TVerticalAlignment ipe::Attribute::verticalAlignment | ( |  | ) | const`[inline]`

TLineJoin ipe::Attribute::lineJoin | ( |  | ) | const`[inline]`

TLineCap ipe::Attribute::lineCap | ( |  | ) | const`[inline]`

TFillRule ipe::Attribute::fillRule | ( |  | ) | const`[inline]`

TPinned ipe::Attribute::pinned | ( |  | ) | const`[inline]`

TTransformations ipe::Attribute::transformations | ( |  | ) | const`[inline]`

TPathMode ipe::Attribute::pathMode | ( |  | ) | const`[inline]`

bool ipe::Attribute::operator== | ( | const Attribute & | rhs | ) | const`[inline]`

Are two values equal (only compares index!)

bool ipe::Attribute::operator!= | ( | const Attribute & | rhs | ) | const`[inline]`

Are two values different (only compares index!)

static Attribute ipe::Attribute::BLACK | ( |  | ) | `[inline, static]`

Create absolute black color.

static Attribute ipe::Attribute::WHITE | ( |  | ) | `[inline, static]`

Create absolute white color.

static Attribute ipe::Attribute::ONE | ( |  | ) | `[inline, static]`

Create absolute number one.

static Attribute ipe::Attribute::NORMAL | ( |  | ) | `[inline, static]`

Create symbolic attribute "normal".

static Attribute ipe::Attribute::UNDEFINED | ( |  | ) | `[inline, static]`

Create symbolic attribute "undefined".

static Attribute ipe::Attribute::BACKGROUND | ( |  | ) | `[inline, static]`

Create symbolic attribute "Background".

static Attribute ipe::Attribute::SYM_STROKE | ( |  | ) | `[inline, static]`

Create symbolic attribute "sym-stroke".

static Attribute ipe::Attribute::SYM_FILL | ( |  | ) | `[inline, static]`

Create symbolic attribute "sym-fill".

static Attribute ipe::Attribute::SYM_PEN | ( |  | ) | `[inline, static]`

Create symbolic attribute "sym-pen".

static Attribute ipe::Attribute::ARROW_NORMAL | ( |  | ) | `[inline, static]`

Create symbolic attribute "arrow/normal(spx)".

static Attribute ipe::Attribute::OPAQUE | ( |  | ) | `[inline, static]`

Create symbolic attribute "opaque".

static Attribute ipe::Attribute::ARROW_ARC | ( |  | ) | `[inline, static]`

Create symbolic attribute "arrow/arc(spx)".

static Attribute ipe::Attribute::ARROW_FARC | ( |  | ) | `[inline, static]`

Create symbolic attribute "arrow/farc(spx)".

Attribute Attribute::makeColor | ( | String | str,
|  | Attribute | deflt
| ) |  | `[static]`

Make a color attribute.

If the string starts with a letter, make a symbolic attribute. Otherwise, it's either a single gray value (0.0 to 1.0), or the three red, green, and blue components, separated by spaces. If it's an empty string, return deflt.

Attribute Attribute::makeScalar | ( | String | str,
|  | Attribute | deflt
| ) |  | `[static]`

Make a scalar attribute.

If str is empty, simply return deflt. If str starts with a letter, make a symbolic attribute. Otherwise, must be a number.

Attribute Attribute::makeDashStyle | ( | String | str | ) | `[static]`

Construct dash style attribute from string.

Strings starting with '[' create an absolute dash style. The empty string is equivalent to 'normal'. Any other string creates a symbolic dash style.

Attribute Attribute::makeTextSize | ( | String | str | ) | `[static]`

Construct text size attribute from string.

String starting with digit creates a numeric absolute value, string starting with letter creates symbolic text size, anything else creates absolute (string) text size. The empty string is treated like "normal".

Attribute Attribute::normal | ( | Kind | kind | ) | `[static]`

Return a standard value for attribute of kind.

The value is used if the stylesheet doesn't define a symbolic attribute used in the document.

## Friends And Related Function Documentation

friend class StyleSheet`[friend]`

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

- ipeattributes.h
- ipeattributes.cpp