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wxGraphicsMatrix(3erl) Erlang Module Definition wxGraphicsMatrix(3erl)

NAME

wxGraphicsMatrix - Functions for wxGraphicsMatrix class

DESCRIPTION

A wxGraphicsMatrix is a native representation of an affine matrix. The contents are specific and private to the respective renderer. Instances are ref counted and can therefore be assigned as usual. The only way to get a valid instance is via wxGraphicsContext:createMatrix/2 or wxGraphicsRenderer:createMatrix/2.

This class is derived (and can use functions) from: wxGraphicsObject

wxWidgets docs: wxGraphicsMatrix

DATA TYPES

wxGraphicsMatrix() = wx:wx_object()

EXPORTS


concat(This, T) -> ok

Types:

This = T = wxGraphicsMatrix()

Concatenates the matrix passed with the current matrix.

The effect of the resulting transformation is to first apply the transformation in t to the coordinates and then apply the transformation in the current matrix to the coordinates.


get(This) -> Result

Types:

Result =
{A :: number(),
B :: number(),
C :: number(),
D :: number(),
Tx :: number(),
Ty :: number()}
This = wxGraphicsMatrix()

Returns the component values of the matrix via the argument pointers.


invert(This) -> ok

Types:

This = wxGraphicsMatrix()

Inverts the matrix.


isEqual(This, T) -> boolean()

Types:

This = T = wxGraphicsMatrix()

Returns true if the elements of the transformation matrix are equal.


isIdentity(This) -> boolean()

Types:

This = wxGraphicsMatrix()

Return true if this is the identity matrix.


rotate(This, Angle) -> ok

Types:

This = wxGraphicsMatrix()
Angle = number()

Rotates this matrix clockwise (in radians).


scale(This, XScale, YScale) -> ok

Types:

This = wxGraphicsMatrix()
XScale = YScale = number()

Scales this matrix.


translate(This, Dx, Dy) -> ok

Types:

This = wxGraphicsMatrix()
Dx = Dy = number()

Translates this matrix.


set(This) -> ok

Types:

This = wxGraphicsMatrix() 


set(This, Options :: [Option]) -> ok

Types:

This = wxGraphicsMatrix()
Option =
{a, number()} |
{b, number()} |
{c, number()} |
{d, number()} |
{tx, number()} |
{ty, number()}

Sets the matrix to the respective values (default values are the identity matrix).


transformPoint(This) -> {X :: number(), Y :: number()}

Types:

This = wxGraphicsMatrix()

Applies this matrix to a point.


transformDistance(This) -> {Dx :: number(), Dy :: number()}

Types:

This = wxGraphicsMatrix()

Applies this matrix to a distance (ie.

performs all transforms except translations).

wx 2.2.1 wxWidgets team.