CEGUI::UDim Class Reference

Dimension that has both a relative 'scale' portion and and absolute 'offset' portion. More...

Inheritance diagram for CEGUI::UDim:

Collaboration diagram for CEGUI::UDim:

Public Member Functions
	UDim (float scale, float offset)
	UDim (const UDim &v)
UDim	operator+ (const UDim &other) const
UDim	operator- (const UDim &other) const
UDim	operator* (const float val) const
UDim	operator* (const UDim &other) const
UDim	operator/ (const UDim &other) const
const UDim &	operator+= (const UDim &other)
const UDim &	operator-= (const UDim &other)
const UDim &	operator*= (const UDim &other)
const UDim &	operator/= (const UDim &other)
bool	operator== (const UDim &other) const
bool	operator!= (const UDim &other) const

Static Public Member Functions
static UDim	zero ()
	finger saving convenience method returning UDim(0, 0)
static UDim	relative ()
	finger saving convenience method returning UDim(1, 0) More...
static UDim	percent ()
	finger saving convenience method returning UDim(0.01, 0) More...
static UDim	px ()
	finger saving convenience method returning UDim(0, 1) More...

Public Attributes
float	d_scale
float	d_offset

Friends
UDim	operator* (const float val, const UDim &u)
std::ostream &	operator<< (std::ostream &s, const UDim &v)
	allows writing the udim to std ostream

Detailed Description

Dimension that has both a relative 'scale' portion and and absolute 'offset' portion.

The meaning of this class depends on where you use it, it is just a float tuple. We will only describe the usual usecase for CEGUI::Window position and size. CEGUI::Window gets that behavior from CEGUI::Element.

UDims are used for both positioning and sizing (hence the name dimension).

The scale component describes the amount of dimension we take from the parent CEGUI::Element. The offset component describes the amount of pixels and is not dependent on any element in the tree.

Example: 50% of parent's width

UDim(0.5f, 0);

Example: 100px

UDim(0, 100.0f);

Negative components

You can use negative components in UDim and they are in fact very useful!

UDim(1.0f, -100.0f); // 100px to the left from the right edge of parent widget

Floating point

Both components are floats, that means that expressing fractions of pixels is allowed even though such construct goes against the definition of pixel.

UDim(0.0f, 1.123456f); // perfectly valid UDim

Keep in mind that if you use such dimensions they will likely get pixel aligned before rendering. You can disable such behavior via Element::setPixelAligned.

See also

CEGUI::UVector2

CEGUI::USize

CEGUI::URect

Member Function Documentation

static UDim CEGUI::UDim::percent ( )

inlinestatic

finger saving convenience method returning UDim(0.01, 0)

Note

Allows quite neat 50 * UDim::percent() self documenting syntax

static UDim CEGUI::UDim::px ( )

inlinestatic

finger saving convenience method returning UDim(0, 1)

Note

Allows quite neat 100 * UDim::px() self documenting syntax, you can combine it with UDim::relative() as well (using operator+)

static UDim CEGUI::UDim::relative ( )

inlinestatic

finger saving convenience method returning UDim(1, 0)

Note

Allows quite neat 0.5 * UDim::relative() self documenting syntax