lt.monarch.chart.marker
Class SimpleCachableMarker

java.lang.Object
  lt.monarch.chart.marker.AbstractMarker
      lt.monarch.chart.marker.SimpleCachableMarker

All Implemented Interfaces:

java.io.Serializable, Marker, StyleEditorEntity, SymetricMarker, StylesheetListener

Direct Known Subclasses:

CrossMarker, DiamondMarker, DotMarker, SimpleCrossMarker, SquareMarker

public abstract class SimpleCachableMarker
extends AbstractMarker
implements SymetricMarker, StylesheetListener

Base class for simple markers that are able to use off screen image to cache their view for improved rendering performance.

See Also:

Serialized Form

Nested Class Summary

Modifier and Type	Class and Description
protected static class	SimpleCachableMarker.AWTImageFactory
protected static class	SimpleCachableMarker.BufferedImageFactory
protected static interface	SimpleCachableMarker.ImageFactory

Field Summary

Modifier and Type	Field and Description
protected java.awt.Image	cacheImage Offscreen image used for caching.
protected boolean	cachingEnabled Indicates whether offscreen image should be used for drawing a marker.
protected static SimpleCachableMarker.ImageFactory	imageFactory Factory for offscreen cache image creation.
protected double	markerSize Marker dot size

Fields inherited from class lt.monarch.chart.marker.AbstractMarker

dirty, map, metaModel, paintStyle, projectedLocation, style

Constructor and Description

SimpleCachableMarker()
Default marker constructor.

Method Summary

Modifier and Type	Method and Description
void	dispose() Disposes object
double	getMarkerSize() Gets marker radius
boolean	isCachingEnabled() Returns true, if caching is used when drawing the marker.
protected void	resetCache() Resets the cached image.
void	setCachingEnabled(boolean enabled) Enables/disables a caching when drawing the marker. By default caching is disabled.
void	setMarkerSize(double size) Sets size for this marker.
void	stylesheetChanged(Stylesheet stylesheet) Notifies that stylesheet structure has totally changed.
void	stylesheetKeyChanged(Stylesheet stylesheet, Key key) Notifies that stylesheet key has been added or removed.

Methods inherited from class lt.monarch.chart.marker.AbstractMarker

clearChartObjectsMap, draw, finalize, getChartObjectBounds, getMetaModel, getPaintStyle, getParent, getStyle, getTransparencyValue, isVisible, mapChartObject, prepare, reset, setChartObjectsMap, setEntity, setLocation, setMetaModel, setTextAlignment, setTransparencyValue, setVisible

Methods inherited from class java.lang.Object

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

Methods inherited from interface lt.monarch.chart.engine.Marker

clearChartObjectsMap, draw, draw, getBounds, getMetaModel, getPaintStyle, getTransparencyValue, isVisible, prepare, reset, setChartObjectsMap, setEntity, setLocation, setMetaModel, setTextAlignment, setTransparencyValue

Methods inherited from interface lt.monarch.chart.engine.StyleEditorEntity

getChartObjectBounds, getParent, getStyle

Field Detail

markerSize

protected double markerSize

Marker dot size

cachingEnabled

protected boolean cachingEnabled

Indicates whether offscreen image should be used for drawing a marker.

cacheImage

protected java.awt.Image cacheImage

Offscreen image used for caching.

imageFactory

protected static final SimpleCachableMarker.ImageFactory imageFactory

Factory for offscreen cache image creation.

Constructor Detail

SimpleCachableMarker

public SimpleCachableMarker()

Default marker constructor.

Method Detail

setCachingEnabled

public void setCachingEnabled(boolean enabled)

Enables/disables a caching when drawing the marker.
By default caching is disabled. Caching definitely should be used when drawing large numbers of markers.

Parameters:

enabled - true, if caching should be used.

isCachingEnabled

public boolean isCachingEnabled()

Returns true, if caching is used when drawing the marker.

Returns:

value showing if caching is enabled

stylesheetChanged

public void stylesheetChanged(Stylesheet stylesheet)

Description copied from interface: StylesheetListener

Notifies that stylesheet structure has totally changed.

Specified by:

stylesheetChanged in interface StylesheetListener

Parameters:

stylesheet - stylesheet, which has changed

stylesheetKeyChanged

public void stylesheetKeyChanged(Stylesheet stylesheet,
                                 Key key)

Description copied from interface: StylesheetListener

Notifies that stylesheet key has been added or removed.

Specified by:

stylesheetKeyChanged in interface StylesheetListener

Parameters:

stylesheet - stylesheet, which has changed

key - the key that has been added or removed

resetCache

protected void resetCache()

Resets the cached image. This method must be called when marker view is changed and therefore offscreen image must be repainted.

setMarkerSize

public void setMarkerSize(double size)

Description copied from interface: SymetricMarker

Sets size for this marker.

Specified by:

setMarkerSize in interface SymetricMarker

Parameters:

size - new marker size

getMarkerSize

public double getMarkerSize()

Description copied from interface: SymetricMarker

Gets marker radius

Specified by:

getMarkerSize in interface SymetricMarker

Returns:

marker radius

dispose

public void dispose()

Description copied from class: AbstractMarker

Disposes object

Specified by:

dispose in interface Marker

Overrides:

dispose in class AbstractMarker