com.vividsolutions.jtstest.testbuilder.ui

Class Viewport

java.lang.Object

com.vividsolutions.jtstest.testbuilder.ui.Viewport

All Implemented Interfaces:

PointTransformation

public class Viewport
extends Object
implements PointTransformation

Maintains the information associated with mapping the model view to the screen

Author:

Martin Davis

Constructor Summary

Constructors

Constructor and Description
Viewport(GeometryEditPanel panel)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	containsInModel(Coordinate p)
PrecisionModel	getGridPrecisionModel() Gets a PrecisionModel corresponding to the grid size.
double	getGridSizeModel()
double	getHeightInView()
Point2D	getLowerLeftCornerInModel()
Envelope	getModelEnv()
AffineTransform	getModelToViewTransform()
double	getScale()
NumberFormat	getScaleFormat()
Envelope	getViewEnv()
double	getWidthInView()
int	gridMagnitudeModel() Gets the magnitude (power of 10) for the basic grid size.
boolean	intersectsInModel(Envelope env)
double	toModel(double viewDist) Converts a distance in the view to a distance in the model.
Point2D	toModel(Point2D viewPt)
Coordinate	toModelCoordinate(Point2D viewPt)
Point2D	toView(Coordinate modelCoordinate)
double	toView(double modelDist) Converts a distance in the model to a distance in the view.
Point2D	toView(Point2D modelPt)
Point2D	toView(Point2D modelPt, Point2D viewPt)
void	transform(Coordinate modelCoordinate, Point2D point) Transforms a Coordinate into a Java2D Point.
void	update(Dimension viewSize)
void	zoom(Envelope zoomEnv)
void	zoom(Point2D zoomPt, double zoomScale) Zoom to a point, ensuring that the zoom point remains in the same screen location.
void	zoomPan(double dx, double dy)
void	zoomToInitialExtent()

Methods inherited from class java.lang.Object

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

Constructor Detail

Viewport

public Viewport(GeometryEditPanel panel)

Method Detail

getModelEnv

public Envelope getModelEnv()

getViewEnv

public Envelope getViewEnv()

getScale

public double getScale()

getScaleFormat

public NumberFormat getScaleFormat()

intersectsInModel

public boolean intersectsInModel(Envelope env)

toModel

public Point2D toModel(Point2D viewPt)

toModelCoordinate

public Coordinate toModelCoordinate(Point2D viewPt)

transform

public void transform(Coordinate modelCoordinate,
             Point2D point)

Description copied from interface: PointTransformation

Transforms a Coordinate into a Java2D Point.

Specified by:

transform in interface PointTransformation

Parameters:

modelCoordinate - the source Coordinate

point - the destination Point

toView

public Point2D toView(Coordinate modelCoordinate)

toView

public Point2D toView(Point2D modelPt)

toView

public Point2D toView(Point2D modelPt,
             Point2D viewPt)

toModel

public double toModel(double viewDist)

Converts a distance in the view to a distance in the model.

Parameters:

viewDist -

Returns:

the model distance

toView

public double toView(double modelDist)

Converts a distance in the model to a distance in the view.

Parameters:

modelDist -

Returns:

the view distance

update

public void update(Dimension viewSize)

getModelToViewTransform

public AffineTransform getModelToViewTransform()

zoomToInitialExtent

public void zoomToInitialExtent()

zoom

public void zoom(Envelope zoomEnv)

zoomPan

public void zoomPan(double dx,
           double dy)

zoom

public void zoom(Point2D zoomPt,
        double zoomScale)

Zoom to a point, ensuring that the zoom point remains in the same screen location.

Parameters:

zoomPt -

zoomFactor -

getLowerLeftCornerInModel

public Point2D getLowerLeftCornerInModel()

getHeightInView

public double getHeightInView()

getWidthInView

public double getWidthInView()

containsInModel

public boolean containsInModel(Coordinate p)

gridMagnitudeModel

public int gridMagnitudeModel()

Gets the magnitude (power of 10) for the basic grid size.

Returns:

the magnitude

getGridPrecisionModel

public PrecisionModel getGridPrecisionModel()

Gets a PrecisionModel corresponding to the grid size.

Returns:

the precision model

getGridSizeModel

public double getGridSizeModel()