ucar.nc2.ui.geoloc

Class Navigation

java.lang.Object

ucar.nc2.ui.geoloc.Navigation

public class Navigation
extends java.lang.Object

Consider this a private inner class of NavigatedPanel. Handle display to world coordinate transformation, always linear. Call np.newMapAreaEvent() when MapArea changes. setMapArea() trigger a NewMapAreaEvent also.

Method Summary

Modifier and Type	Method and Description
java.awt.geom.AffineTransform	calcTransform(boolean rotate, double displayX, double displayY, double displayWidth, double displayHeight) Calculate an affine transform based on the display size parameters - used for printing.
ProjectionRect	getMapArea(ProjectionRect rect) Get current MapArea .
double	getPixPerWorld()
double	getScreenHeight()
double	getScreenWidth()
java.awt.geom.AffineTransform	getTransform() Get the affine transform based on screen size and world bounding box
void	moveDown()
void	moveLeft()
void	moveRight()
void	moveUp()
void	pan(double deltax, double deltay) call this to change the center of the screen's world coordinates.
ProjectionRect	screenToWorld(java.awt.geom.Point2D start, java.awt.geom.Point2D end) convert screen Rectangle to a projection (world) rectangle
ProjectionPointImpl	screenToWorld(java.awt.geom.Point2D p, ProjectionPointImpl w) convert a display point to a world coordinate
void	setMapArea(ProjectionRect ma)
void	setScreenSize(double pwidth, double pheight)
boolean	wantRotate(double displayWidth, double displayHeight)
java.awt.geom.Point2D	worldToScreen(ProjectionPointImpl w, java.awt.geom.Point2D p) convert a world coordinate to a display point
java.awt.Rectangle	worldToScreen(ProjectionRect projRect) convert a projection (world) rectangle to a screen Rectangle
void	zoom(double startx, double starty, double width, double height) call this to zoom into a subset of the screen.
void	zoomIn()
void	zoomIn(double x, double y)
void	zoomOut()
void	zoomOut(double x, double y)
void	zoomPrevious()

Methods inherited from class java.lang.Object

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

Method Detail

getScreenWidth

public double getScreenWidth()

getScreenHeight

public double getScreenHeight()

setScreenSize

public void setScreenSize(double pwidth,
                          double pheight)

getTransform

public java.awt.geom.AffineTransform getTransform()

Get the affine transform based on screen size and world bounding box

wantRotate

public boolean wantRotate(double displayWidth,
                          double displayHeight)

calcTransform

public java.awt.geom.AffineTransform calcTransform(boolean rotate,
                                                   double displayX,
                                                   double displayY,
                                                   double displayWidth,
                                                   double displayHeight)

Calculate an affine transform based on the display size parameters - used for printing.

Parameters:

rotate - should the page be rotated?

displayX - upper right corner of display area

displayY - upper right corner of display area

displayWidth - display area

displayHeight - display area see Navigation.calcTransform

getMapArea

public ProjectionRect getMapArea(ProjectionRect rect)

Get current MapArea .

Parameters:

rect - : place results here, or null to create new Object

setMapArea

public void setMapArea(ProjectionRect ma)

worldToScreen

public java.awt.geom.Point2D worldToScreen(ProjectionPointImpl w,
                                           java.awt.geom.Point2D p)

convert a world coordinate to a display point

screenToWorld

public ProjectionPointImpl screenToWorld(java.awt.geom.Point2D p,
                                         ProjectionPointImpl w)

convert a display point to a world coordinate

getPixPerWorld

public double getPixPerWorld()

screenToWorld

public ProjectionRect screenToWorld(java.awt.geom.Point2D start,
                                    java.awt.geom.Point2D end)

convert screen Rectangle to a projection (world) rectangle

worldToScreen

public java.awt.Rectangle worldToScreen(ProjectionRect projRect)

convert a projection (world) rectangle to a screen Rectangle

pan

public void pan(double deltax,
                double deltay)

call this to change the center of the screen's world coordinates. deltax, deltay in display coordinates

zoom

public void zoom(double startx,
                 double starty,
                 double width,
                 double height)

call this to zoom into a subset of the screen. startx, starty are the upper left corner of the box in display coords width, height the size of the box in display coords

zoomIn

public void zoomIn(double x,
                   double y)

zoomOut

public void zoomOut(double x,
                    double y)

zoomIn

public void zoomIn()

zoomOut

public void zoomOut()

moveDown

public void moveDown()

moveUp

public void moveUp()

moveRight

public void moveRight()

moveLeft

public void moveLeft()

zoomPrevious

public void zoomPrevious()