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com.cosylab.gui.components.gauger
Class PolarTransform

java.lang.Object
  com.cosylab.gui.components.gauger.ScaleTransform
      com.cosylab.gui.components.gauger.PolarTransform

Direct Known Subclasses:

PolarFullTransform, PolarHorizontalTransform, PolarVerticalTransform

public abstract class PolarTransform
extends ScaleTransform

Base class for polar transforms. All polar transforms will be rendered using scale in the shape of arc.

Version:

$id$

Author:

Ales Pucelj

Nested Class Summary

Nested classes/interfaces inherited from class com.cosylab.gui.components.gauger.ScaleTransform

ScaleTransform.ArcSegment, ScaleTransform.LineSegment, ScaleTransform.RectangleSegment, ScaleTransform.ScaleSegment

Field Summary

protected double	alpha
protected java.awt.geom.Point2D	centre
protected int	height
protected double	r
protected double	R
protected double	span
protected double	tickOffset

Constructor Summary

PolarTransform()

Method Summary

void	mapUVtoXY(java.awt.geom.Point2D scaleSpace, java.awt.geom.Point2D cartesianSpace) Maps the point specified with (u, v) coordinates in the scale space to cartesian space with coordinates (x, y).
void	mapXYtoUV(java.awt.geom.Point2D cartesianSpace, java.awt.geom.Point2D scaleScape)
int	measureTick(java.awt.Graphics g, double x, java.lang.String text) Measues the width of tick label.
double	scaleHeight(double u) Returns the height of scale in pixels at the specified location u in the scale space.
double	scaleWidth(double v) Returns the width of scale in pixels at the specified location v in the scale space.
void	setParameters(int w, int h, int marginX, int marginY, int tickOffset) Sets the component parameters for this transformation.

Methods inherited from class com.cosylab.gui.components.gauger.ScaleTransform

addSegment, getAngle, getLabelPosition, getSegment, getSegmentCount, isPolar, mapUVtoXY, mapUVtoXY, setLabelPosition, setPolar

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

centre

protected java.awt.geom.Point2D centre

R

protected double R

r

protected double r

alpha

protected double alpha

span

protected double span

height

protected int height

tickOffset

protected double tickOffset

Constructor Detail

PolarTransform

public PolarTransform()

Method Detail

setParameters

public void setParameters(int w,
                          int h,
                          int marginX,
                          int marginY,
                          int tickOffset)

Description copied from class: ScaleTransform

Sets the component parameters for this transformation.

Specified by:

setParameters in class ScaleTransform

Parameters:

w - width of the component that will display this transformation

h - height of the component that will display this transformation

marginX - not used

marginY - not used

tickOffset - space between the edge of the scale and the first tick

mapUVtoXY

public void mapUVtoXY(java.awt.geom.Point2D scaleSpace,
                      java.awt.geom.Point2D cartesianSpace)

Description copied from class: ScaleTransform

Maps the point specified with (u, v) coordinates in the scale space to cartesian space with coordinates (x, y). (u, v) values must be in [0..1] range, the (x, y) points will be in (0..w-1, 0..h-1) range.

Specified by:

mapUVtoXY in class ScaleTransform

Parameters:

scaleSpace - point in scale space

cartesianSpace - point in cartesian space

mapXYtoUV

public void mapXYtoUV(java.awt.geom.Point2D cartesianSpace,
                      java.awt.geom.Point2D scaleScape)

scaleWidth

public double scaleWidth(double v)

Description copied from class: ScaleTransform

Returns the width of scale in pixels at the specified location v in the scale space. Although the scale for v is only defined in the range [0..1], this value can generaly return even values outside this range, although this is not guaranteed.

Specified by:

scaleWidth in class ScaleTransform

Returns:

Width of scale in pixels.

scaleHeight

public double scaleHeight(double u)

Description copied from class: ScaleTransform

Returns the height of scale in pixels at the specified location u in the scale space. Although the scale for u is only defined in the range [0..1], this value can generaly return even values outside this range, although this is not guaranteed.

Specified by:

scaleHeight in class ScaleTransform

Returns:

Height of scale in pixels.

measureTick

public int measureTick(java.awt.Graphics g,
                       double x,
                       java.lang.String text)

Description copied from class: ScaleTransform

Measues the width of tick label.

Specified by:

measureTick in class ScaleTransform

Parameters:

g - Graphic context.

x - Relative position of tick.

text - Tick label.

Returns:

Width of label in pixels.

See Also:

ScaleTransform.measureTick(Graphics, double, String)