org.biojava.bio.gui.sequence
Class CrosshairRenderer

java.lang.Object
  org.biojava.utils.AbstractChangeable
      org.biojava.bio.gui.sequence.CrosshairRenderer

All Implemented Interfaces:

PairwiseSequenceRenderer, Changeable

public class CrosshairRenderer
extends AbstractChangeable
implements PairwiseSequenceRenderer

CrosshairRenderer draws a crosshair, optionally with coordinates. The crosshair is set to a sequence position by a click and then stays there through scrolls/rescales until the next click. See the processMouseEvent documentation for details of responses to various mouse actions.

Since:

1.2

Author:

Keith James

Nested Class Summary

Nested classes/interfaces inherited from interface org.biojava.bio.gui.sequence.PairwiseSequenceRenderer

PairwiseSequenceRenderer.PairwiseRendererForwarder

Field Summary

static ChangeType	OUTLINE Constant OUTLINE indicating a change to the crosshair paint.
protected Point	point point is the current location (in sequence coordinates) of the crosshair in the X and Y sequences.
protected Line2D	xHair xHair is the vertical line positioned along the X-axis.
protected Line2D	yHair yHair is the horizontal line positioned along the Y-axis.

Constructor Summary

CrosshairRenderer()
Creates a new CrosshairRenderer in light grey with coordinates displayed.

CrosshairRenderer(Paint outline)
Creates a new CrosshairRenderer of the specified colour, with coordinates displayed.

Method Summary

void	coordinateDisplayOn(boolean display) coordinateDisplayOn toggles the display of sequence coordinates.
Paint	getOutline() getOutline returns the colour used to draw the lines.
void	paint(Graphics2D g2, PairwiseRenderContext context) paints some or all of the information about the sequence pair.
SequenceViewerEvent	processMouseEvent(PairwiseRenderContext context, MouseEvent me, List path) processMouseEvent processes any MouseEvents directed to the renderer.
void	setOutline(Paint outline) setOutline sets the the colour used to draw the lines.

Methods inherited from class org.biojava.utils.AbstractChangeable

addChangeListener, addChangeListener, generateChangeSupport, getChangeSupport, hasListeners, hasListeners, isUnchanging, removeChangeListener, removeChangeListener

Methods inherited from class java.lang.Object

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

Field Detail

OUTLINE

public static final ChangeType OUTLINE

Constant OUTLINE indicating a change to the crosshair paint.

xHair

protected Line2D xHair

xHair is the vertical line positioned along the X-axis.

yHair

protected Line2D yHair

yHair is the horizontal line positioned along the Y-axis.

point

protected Point point

point is the current location (in sequence coordinates) of the crosshair in the X and Y sequences.

Constructor Detail

CrosshairRenderer

public CrosshairRenderer()

Creates a new CrosshairRenderer in light grey with coordinates displayed.

CrosshairRenderer

public CrosshairRenderer(Paint outline)

Creates a new CrosshairRenderer of the specified colour, with coordinates displayed.

Parameters:

outline - a Paint.

Method Detail

paint

public void paint(Graphics2D g2,
                  PairwiseRenderContext context)

Description copied from interface: PairwiseSequenceRenderer

paints some or all of the information about the sequence pair.

Specified by:

paint in interface PairwiseSequenceRenderer

Parameters:

g2 - a Graphics2D.

context - a PairwiseRenderContext encapsulating the information to be displayed.

coordinateDisplayOn

public void coordinateDisplayOn(boolean display)

coordinateDisplayOn toggles the display of sequence coordinates.

Parameters:

display - a boolean.

getOutline

public Paint getOutline()

getOutline returns the colour used to draw the lines.

Returns:

a Paint.

setOutline

public void setOutline(Paint outline)
                throws ChangeVetoException

setOutline sets the the colour used to draw the lines.

Parameters:

outline - a Paint.

Throws:

ChangeVetoException - if an error occurs.

processMouseEvent

public SequenceViewerEvent processMouseEvent(PairwiseRenderContext context,
                                             MouseEvent me,
                                             List path)

processMouseEvent processes any MouseEvents directed to the renderer.

Mouse actions are as follows (all are button-1 only):

• Click sets the crosshair position and returns an event whose target object is the Point in sequence coordinates. The X coordinate is in the primary sequence, the Y coordinate is in the secondary sequence.
• Press same as Click
• Drag same as Click, except that the Point is not set
• Release same as Click, except that the Point is not set
• Move same as Click, except that the Point is not set and the target is null

Specified by:

processMouseEvent in interface PairwiseSequenceRenderer

Parameters:

context - a PairwiseRenderContext.

me - a MouseEvent.

path - a List.

Returns:

a SequenceViewerEvent.