gumbo.visualize.data.layout
Interface LayoutGraphicTransform

All Known Implementing Classes:

GraphLayoutEngine

public interface LayoutGraphicTransform

An interface that allows geometric transformation between layout and graphic space. Typically implemented by the layout engine, which manages the layout dimensions and directions used by this transform. Typically used by layout views as part of validateLayoutDisplay(). For efficiency, the transformation state is typically pre-computed and remains constant throughout the layout process. As such, it typically requires some form of initialization before each layout.

Version:

$Revision: 1.7 $

Author:

Jon Barrilleaux (jonb@jmbaai.com) of JMB and Associates Inc.

Method Summary

Point3	fromGraphicPosition(Point3 point, Point3 retVal) Transforms a position from graphic to layout space.
Size3	fromGraphicSize(Size3 size, Size3 retVal) Transforms a size from graphic to layout space.
Point3	toGraphicPosition(Point3 point, Point3 retVal) Transforms a position from layout to graphic space.
Size3	toGraphicSize(Size3 size, Size3 retVal) Transforms a size from layout to graphic space.

Method Detail

toGraphicPosition

public Point3 toGraphicPosition(Point3 point,
                                Point3 retVal)

Transforms a position from layout to graphic space.

Parameters:

point - Position in layout space. Never null.

retVal - Return value object. Position in graphic space. Never null.

Returns:

Reference to retVal. Never null.

fromGraphicPosition

public Point3 fromGraphicPosition(Point3 point,
                                  Point3 retVal)

Transforms a position from graphic to layout space.

Parameters:

point - Position in graphic space. Never null.

retVal - Return value object. Position in layout space. Never null.

Returns:

Reference to retVal. Never null.

toGraphicSize

public Size3 toGraphicSize(Size3 size,
                           Size3 retVal)

Transforms a size from layout to graphic space.

Parameters:

size - Size in layout space. Never null.

retVal - Return value object. Size in graphic space. Never null.

Returns:

Reference to retVal. Never null.

fromGraphicSize

public Size3 fromGraphicSize(Size3 size,
                             Size3 retVal)

Transforms a size from graphic to layout space.

Parameters:

size - Size in graphic space. Never null.

retVal - Return value object. Size in layout space. Never null.

Returns:

Reference to retVal. Never null.