de.lmu.ifi.dbs.elki.visualization.visualizers
Class AbstractVisualization

java.lang.Object
  de.lmu.ifi.dbs.elki.visualization.visualizers.AbstractVisualization

All Implemented Interfaces:

ResultListener, ContextChangeListener, Visualization, EventListener

Direct Known Subclasses:

AbstractOPTICSVisualization, P1DVisualization, P2DVisualization, PixmapVisualizer, SimilarityMatrixVisualizer, StaticVisualization, ThumbnailVisualization

public abstract class AbstractVisualization
extends Object
implements Visualization, ContextChangeListener, ResultListener

Abstract base class for visualizations.

Field Summary

protected VisualizerContext	context Our context
protected Element	layer Layer storage
protected Runnable	pendingRedraw Pending redraw
protected SVGPlot	svgp The plot we are attached to
protected VisualizationTask	task The visualization task we do.

Constructor Summary

AbstractVisualization(VisualizationTask task)
Constructor.

Method Summary

void	contextChanged(ContextChangedEvent e) Method called on context changes (e.g. projection changes).
void	destroy() Destroy the visualization.
protected double	getHeight() Get the height
Element	getLayer() Get the SVG layer of the given visualization.
protected double	getWidth() Get the width
protected void	incrementalRedraw() Redraw the visualization (maybe incremental).
protected abstract void	redraw() Perform a full redraw.
void	resultAdded(Result child, Result parent) A new derived result was added.
void	resultChanged(Result current) Notify that the current result has changed substantially.
void	resultRemoved(Result child, Result parent) A result was removed.
protected void	synchronizedRedraw() Trigger a redraw, but avoid excessive redraws.
protected boolean	testRedraw(ContextChangedEvent e) Override this method to add additional redraw triggers!

Methods inherited from class java.lang.Object

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

Field Detail

task

protected final VisualizationTask task

The visualization task we do.

context

protected final VisualizerContext context

Our context

svgp

protected final SVGPlot svgp

The plot we are attached to

pendingRedraw

protected Runnable pendingRedraw

Pending redraw

layer

protected Element layer

Layer storage

Constructor Detail

AbstractVisualization

public AbstractVisualization(VisualizationTask task)

Constructor.

Parameters:

task - Visualization task

Method Detail

destroy

public void destroy()

Description copied from interface: Visualization

Destroy the visualization. Called after the elements have been removed from the document. Implementations should remove their listeners etc.

Specified by:

destroy in interface Visualization

getLayer

public Element getLayer()

Description copied from interface: Visualization

Get the SVG layer of the given visualization.

Specified by:

getLayer in interface Visualization

Returns:

layer

getWidth

protected double getWidth()

Get the width

Returns:

the width

getHeight

protected double getHeight()

Get the height

Returns:

the height

contextChanged

public void contextChanged(ContextChangedEvent e)

Description copied from interface: ContextChangeListener

Method called on context changes (e.g. projection changes). Usually, this should trigger a redraw!

Specified by:

contextChanged in interface ContextChangeListener

Parameters:

e - Change event

testRedraw

protected boolean testRedraw(ContextChangedEvent e)

Override this method to add additional redraw triggers!

Parameters:

e - Event

Returns:

Test result

synchronizedRedraw

protected final void synchronizedRedraw()

Trigger a redraw, but avoid excessive redraws.

incrementalRedraw

protected void incrementalRedraw()

Redraw the visualization (maybe incremental). Optional - by default, it will do a full redraw, which often is faster!

redraw

protected abstract void redraw()

Perform a full redraw.

resultAdded

public void resultAdded(Result child,
                        Result parent)

Description copied from interface: ResultListener

A new derived result was added.

Specified by:

resultAdded in interface ResultListener

Parameters:

child - New child result added

parent - Parent result that was added to

resultChanged

public void resultChanged(Result current)

Description copied from interface: ResultListener

Notify that the current result has changed substantially.

Specified by:

resultChanged in interface ResultListener

Parameters:

current - Result that has changed.

resultRemoved

public void resultRemoved(Result child,
                          Result parent)

Description copied from interface: ResultListener

A result was removed.

Specified by:

resultRemoved in interface ResultListener

Parameters:

child - result that was removed

parent - Parent result that was removed from