info.monitorenter.gui.chart.views

Class ChartPanel

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JLayeredPane

info.monitorenter.gui.chart.views.ChartPanel

All Implemented Interfaces:

java.awt.image.ImageObserver, java.awt.MenuContainer, java.beans.PropertyChangeListener, java.io.Serializable, java.util.EventListener, javax.accessibility.Accessible

public class ChartPanel
extends javax.swing.JLayeredPane
implements java.beans.PropertyChangeListener

A decoration for Chart2D that adds various controls for a Chart2D and it's ITrace2D instances in form of popup menues.

Performance note

The context menu items register themselves with the chart to adapt their basic UI properties (font, foreground color, background color) via weak referenced instances of LayoutFactory.BasicPropertyAdaptSupport . This ensures that dropping a complete menu tree from the UI makes them garbage collectable without introduction of highly unstable and unmaintainable active memory management code. A side effect is that these listeners remain in the property change listener list of the chart unless they are finalized.

Adding and removing many traces to / from charts that are wrapped in ChartPanel without System.gc() followed by System.runFinalization() in your code will leave a huge amount of listeners for non-visible uncleaned menu items in the chart which causes a high cpu throttle for increasing the listener list.

The reason seems to be the implementation of ( EventListenerList that is used by SwingPropertyChangeSupport). It is based upon an array an grows only for the space of an additional listener by using System.arraycopy(java.lang.Object, int, java.lang.Object, int, int) (ouch, this should be changed).

Profiling a day with showed that up to 2000 dead listeners remained in the list. The cpu load increased after about 200 add / remove trace operations. Good news is that no memory leak could be detected.

If those add and remove trace operations on ChartPanel - connected charts are performed with intermediate UI action property change events on dead listeners will let them remove themselves from the listener list thus avoiding the cpu overhead. So UI / user - controlled applications will unlikely suffer from this problem.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.JComponent

javax.swing.JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class java.awt.Component

java.awt.Component.BaselineResizeBehavior

Field Summary

Fields inherited from class javax.swing.JLayeredPane

DEFAULT_LAYER, DRAG_LAYER, FRAME_CONTENT_LAYER, LAYER_PROPERTY, MODAL_LAYER, PALETTE_LAYER, POPUP_LAYER

Fields inherited from class javax.swing.JComponent

TOOL_TIP_TEXT_KEY, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Constructors

Constructor and Description
ChartPanel(Chart2D chart) Creates an instance that decorates the given chart with controls in form of popup menus.
ChartPanel(Chart2D chart, boolean adaptUI2Chart) Creates an instance that decorates the given chart with controls in form of popup menus.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
IAnnotationCreator	getAnnotationCreator() Returns the annotationCreator.
Chart2D	getChart() Returns the chart.
int	hashCode()
static void	main(java.lang.String[] args) Main enbtry for demo app.
void	propertyChange(java.beans.PropertyChangeEvent evt) Listens for property "background" of the Chart2D instance that is contained in this component and sets the background color.
void	setAnnotationCreator(IAnnotationCreator annotationCreator) Sets the annotationCreator.

Methods inherited from class javax.swing.JLayeredPane

getAccessibleContext, getComponentCountInLayer, getComponentsInLayer, getIndexOf, getLayer, getLayer, getLayeredPaneAbove, getPosition, highestLayer, isOptimizedDrawingEnabled, lowestLayer, moveToBack, moveToFront, paint, putLayer, remove, removeAll, setLayer, setLayer, setPosition

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getUIClassID, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isPaintingForPrint, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paintImmediately, paintImmediately, print, printAll, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update, updateUI

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, remove, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, contains, createImage, createImage, createVolatileImage, createVolatileImage, dispatchEvent, enable, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ChartPanel

public ChartPanel(Chart2D chart)

Creates an instance that decorates the given chart with controls in form of popup menus.

Parameters:

chart - A configured Chart2D instance that will be displayed and controlled by this panel.

ChartPanel

public ChartPanel(Chart2D chart,
                  boolean adaptUI2Chart)

Creates an instance that decorates the given chart with controls in form of popup menus.

Parameters:

chart - A configured Chart2D instance that will be displayed and controlled by this panel.

adaptUI2Chart - if true the menu will adapt it's basic UI properties (font, foreground and background color) to the given chart.

Method Detail

main

public static void main(java.lang.String[] args)

Main enbtry for demo app.

Parameters:

args - ignored.

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

See Also:

Object.equals(java.lang.Object)

getAnnotationCreator

public final IAnnotationCreator getAnnotationCreator()

Returns the annotationCreator.

Returns:

the annotationCreator

getChart

public final Chart2D getChart()

Returns the chart.

Returns:

the chart

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

See Also:

Object.hashCode()

propertyChange

public void propertyChange(java.beans.PropertyChangeEvent evt)

Listens for property "background" of the Chart2D instance that is contained in this component and sets the background color.

Specified by:

propertyChange in interface java.beans.PropertyChangeListener

See Also:

PropertyChangeListener.propertyChange(java.beans.PropertyChangeEvent)

setAnnotationCreator

public final void setAnnotationCreator(IAnnotationCreator annotationCreator)

Sets the annotationCreator.

Parameters:

annotationCreator - the annotationCreator to set