Package PamView.zoomer

Class Zoomer

java.lang.Object

PamView.zoomer.Zoomer

public class Zoomer
extends Object

Class for handling multiple zoom and marked areas on a display.

The zoomer will generally handle both dragged rectangular zoom boxes and also more complicated polygons created by double clicking at a start point and then repeatedly single clicking until back at the start point

Author:

Doug Gillespie

Constructor Summary

Constructors

Constructor	Description
Zoomer(Zoomable zoomableThing, Component zoomableComponent)

Method Summary

Modifier and Type	Method	Description
int	appendZoomMenuItems(Container menu)	Add menu items associated with zooming into a pre-existing menu.
void	clearLatestShape()
ZoomShape	findLastZoom(int coodinateType)
ZoomShape	getTopMostShape()
PamView.zoomer.Zoomer.ZoomerMouse	getZoomerMouse()
boolean	isInMark(Component c, Point pt)
Rectangle	paintShape(Graphics g, Component c, boolean beforeOther)	Paint the top most shape in the zoom sequence
protected double	pointXtoVal(int x)	Convert a point in pixels to a value for the x scale
protected double	pointYtoVal(Component c, int y)	Convert a point in pixels to a value for the y scale
protected Point	xyValToPoint(Component c, double x, double y)

Methods inherited from class java.lang.Object

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

Constructor Details

Zoomer

public Zoomer(Zoomable zoomableThing,
 Component zoomableComponent)

Method Details

paintShape

public Rectangle paintShape(Graphics g,
 Component c,
 boolean beforeOther)

Paint the top most shape in the zoom sequence

This should be called twice from the paint function of the component hosting the zoom feature, once before other drawing and once after.

Parameters:

g - graphics

c - component to draw on

beforeOther - called before other drawing

Returns:

outer rectangle of drawing.

xyValToPoint

protected Point xyValToPoint(Component c,
 double x,
 double y)

pointXtoVal

protected double pointXtoVal(int x)

Convert a point in pixels to a value for the x scale

Parameters:

x - x in pixels

Returns:

scaled value in units such as time, bearing, etc.

pointYtoVal

protected double pointYtoVal(Component c,
 int y)

Convert a point in pixels to a value for the y scale

Parameters:

y - y in pixels

Returns:

scaled value in units such as time, bearing, etc.

isInMark

public boolean isInMark(Component c,
 Point pt)

Parameters:

pt - Point on display in pixels.

Returns:

true if there is no mark or if the click is within the marked region

clearLatestShape

public void clearLatestShape()

getTopMostShape

public ZoomShape getTopMostShape()

Returns:

the topMostShape

appendZoomMenuItems

public int appendZoomMenuItems(Container menu)

Add menu items associated with zooming into a pre-existing menu.

Parameters:

menu - menu

Returns:

number of items added.

getZoomerMouse

public PamView.zoomer.Zoomer.ZoomerMouse getZoomerMouse()

Returns:

the zoomerMouse

findLastZoom

public ZoomShape findLastZoom(int coodinateType)