wxErlang

Reference Manual

Version 2.0

Table of Contents

wxGraphicsPath

Module

wxGraphicsPath

Module Summary

Functions for wxGraphicsPath class

Description

A wxGraphicsPath is a native representation of a geometric path. The contents are specific and private to the respective renderer. Instances are reference counted and can therefore be assigned as usual. The only way to get a valid instance is by using wxGraphicsContext:createPath/1 or wxGraphicsRenderer:createPath/1.

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

wxWidgets docs: wxGraphicsPath

Data Types

wxGraphicsPath() = wx:wx_object()

Exports

moveToPoint(This, P) -> ok

Types

This = wxGraphicsPath()
P = {X :: float(), Y :: float()}

Begins a new subpath at p.

moveToPoint(This, X, Y) -> ok

Types

This = wxGraphicsPath()
X = Y = number()

Begins a new subpath at (x,y).

addArc(This, C, R, StartAngle, EndAngle, Clockwise) -> ok

Types

This = wxGraphicsPath()
C = {X :: float(), Y :: float()}
R = StartAngle = EndAngle = number()
Clockwise = boolean()

addArc(This, X, Y, R, StartAngle, EndAngle, Clockwise) -> ok

Types

This = wxGraphicsPath()
X = Y = R = StartAngle = EndAngle = number()
Clockwise = boolean()

Adds an arc of a circle.

The circle is defined by the coordinates of its centre (x, y) or c and its radius r. The arc goes from the starting angle startAngle to endAngle either clockwise or counter-clockwise depending on the value of clockwise argument.

The angles are measured in radians but, contrary to the usual mathematical convention, are always clockwise from the horizontal axis.

If for clockwise arc endAngle is less than startAngle it will be progressively increased by 2*pi until it is greater than startAngle. If for counter-clockwise arc endAngle is greater than startAngle it will be progressively decreased by 2*pi until it is less than startAngle.

If there is a current point set, an initial line segment will be added to the path to connect the current point to the beginning of the arc.

addArcToPoint(This, X1, Y1, X2, Y2, R) -> ok

Types

This = wxGraphicsPath()
X1 = Y1 = X2 = Y2 = R = number()

Adds an arc (of a circle with radius r) that is tangent to the line connecting current point and (x1, y1) and to the line connecting (x1, y1) and (x2, y2).

If the current point and the starting point of the arc are different, a straight line connecting these points is also appended. If there is no current point before the call to addArcToPoint/6 this function will behave as if preceded by a call to MoveToPoint(0, 0). After this call the current point will be at the ending point of the arc.

addCircle(This, X, Y, R) -> ok

Types

This = wxGraphicsPath()
X = Y = R = number()

Appends a circle around (x,y) with radius r as a new closed subpath.

After this call the current point will be at (x+r, y).

addCurveToPoint(This, C1, C2, E) -> ok

Types

This = wxGraphicsPath()
C1 = C2 = E = {X :: float(), Y :: float()}

Adds a cubic bezier curve from the current point, using two control points and an end point.

If there is no current point before the call to addCurveToPoint/7 this function will behave as if preceded by a call to MoveToPoint(c1).

addCurveToPoint(This, Cx1, Cy1, Cx2, Cy2, X, Y) -> ok

Types

This = wxGraphicsPath()
Cx1 = Cy1 = Cx2 = Cy2 = X = Y = number()

Adds a cubic bezier curve from the current point, using two control points and an end point.

If there is no current point before the call to addCurveToPoint/7 this function will behave as if preceded by a call to MoveToPoint(cx1, cy1).

addEllipse(This, X, Y, W, H) -> ok

Types

This = wxGraphicsPath()
X = Y = W = H = number()

Appends an ellipse fitting into the passed in rectangle as a new closed subpath.

After this call the current point will be at (x+w, y+h/2).

addLineToPoint(This, P) -> ok

Types

This = wxGraphicsPath()
P = {X :: float(), Y :: float()}

Adds a straight line from the current point to p.

If current point is not yet set before the call to addLineToPoint/3 this function will behave as moveToPoint/3.

addLineToPoint(This, X, Y) -> ok

Types

This = wxGraphicsPath()
X = Y = number()

Adds a straight line from the current point to (x,y).

If current point is not yet set before the call to addLineToPoint/3 this function will behave as moveToPoint/3.

addPath(This, Path) -> ok

Types

This = Path = wxGraphicsPath()

Adds another path onto the current path.

After this call the current point will be at the added path's current point. For Direct2D the path being appended shouldn't contain a started non-empty subpath when this function is called.

addQuadCurveToPoint(This, Cx, Cy, X, Y) -> ok

Types

This = wxGraphicsPath()
Cx = Cy = X = Y = number()

Adds a quadratic bezier curve from the current point, using a control point and an end point.

If there is no current point before the call to addQuadCurveToPoint/5 this function will behave as if preceded by a call to MoveToPoint(cx, cy).

addRectangle(This, X, Y, W, H) -> ok

Types

This = wxGraphicsPath()
X = Y = W = H = number()

Appends a rectangle as a new closed subpath.

After this call the current point will be at (x, y).

addRoundedRectangle(This, X, Y, W, H, Radius) -> ok

Types

This = wxGraphicsPath()
X = Y = W = H = Radius = number()

Appends a rounded rectangle as a new closed subpath.

If radius equals 0 this function will behave as addRectangle/5, otherwise after this call the current point will be at (x+w, y+h/2).

closeSubpath(This) -> ok

Types

This = wxGraphicsPath()

Closes the current sub-path.

After this call the current point will be at the joined endpoint of the sub-path.

contains(This, C) -> boolean()

Types

This = wxGraphicsPath()
C = {X :: float(), Y :: float()}
contains(This, X, Y) -> boolean()
contains(This, C, Y :: [Option]) -> boolean()

Types

This = wxGraphicsPath()
C = {X :: float(), Y :: float()}
Option = {fillStyle, wx:wx_enum()}

Return: true if the point is within the path.

contains(This, X, Y, Options :: [Option]) -> boolean()

Types

This = wxGraphicsPath()
X = Y = number()
Option = {fillStyle, wx:wx_enum()}

Return: true if the point is within the path.

getBox(This) ->
          {X :: float(), Y :: float(), W :: float(), H :: float()}

Types

This = wxGraphicsPath()

Gets the bounding box enclosing all points (possibly including control points).

getCurrentPoint(This) -> {X :: float(), Y :: float()}

Types

This = wxGraphicsPath()

Gets the last point of the current path, (0,0) if not yet set.

transform(This, Matrix) -> ok

Types

This = wxGraphicsPath()
Matrix = wxGraphicsMatrix:wxGraphicsMatrix()

Transforms each point of this path by the matrix.

For Direct2D the current path shouldn't contain a started non-empty subpath when this function is called.

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