: Class HistogramImageCanvas

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Class HistogramImageCanvas

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--javax.swing.JComponent
                    |
                    +--javax.swing.JLabel
                          |
                          +--NoScaleImageCanvas
                                |
                                +--HistogramImageCanvas

public class HistogramImageCanvas
extends NoScaleImageCanvas

HistogramImageCanvas draws a histogram diagram to a canvas, with red lines indicating the current threshold values. Histogram images are aways drawn at 256X256 pixels

Author:: Judy Robertson SELLIC OnIine
See Also:: Serialized Form

Inner classes inherited from class javax.swing.JLabel

javax.swing.JLabel.AccessibleJLabel

Inner classes inherited from class javax.swing.JComponent

javax.swing.JComponent.AccessibleJComponent

Field Summary
`int`	`highthresh` The high threshold value which must be indicated on the diagram
`java.awt.Image`	`image` The histogram diagram which will be drawn on the canvas
`int`	`lowthresh` The low threshold value which must be indicated on the diagram

Fields inherited from class NoScaleImageCanvas

image_height,  
image_width,  
imageTools

Fields inherited from class javax.swing.JLabel

labelFor

Fields inherited from class javax.swing.JComponent

accessibleContext,  
listenerList,  
TOOL_TIP_TEXT_KEY,  
ui,  
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

Constructor Summary
`HistogramImageCanvas(java.awt.Image i)` Creates a canvas for the specified histogram diagram to appear on

Method Summary
`void`	`paint(java.awt.Graphics g)` Redraws the diagram and its border onto this canvas, with red lines at the threshold points
`void`	`update(java.awt.Graphics g)` Overrides update in the canvas super class so it redraws the image without blanking out the background first.

Methods inherited from class NoScaleImageCanvas

getImageHeight, 
getImageWidth, 
imageScale, 
updateImage

Methods inherited from class javax.swing.JLabel

checkHorizontalKey, 
checkVerticalKey, 
getAccessibleContext, 
getDisabledIcon, 
getDisplayedMnemonic, 
getHorizontalAlignment, 
getHorizontalTextPosition, 
getIcon, 
getIconTextGap, 
getLabelFor, 
getText, 
getUI, 
getUIClassID, 
getVerticalAlignment, 
getVerticalTextPosition, 
paramString, 
setDisabledIcon, 
setDisplayedMnemonic, 
setDisplayedMnemonic, 
setHorizontalAlignment, 
setHorizontalTextPosition, 
setIcon, 
setIconTextGap, 
setLabelFor, 
setText, 
setUI, 
setVerticalAlignment, 
setVerticalTextPosition, 
updateUI

Methods inherited from class javax.swing.JComponent

addAncestorListener, 
addNotify, 
addPropertyChangeListener, 
addVetoableChangeListener, 
computeVisibleRect, 
contains, 
createToolTip, 
firePropertyChange, 
firePropertyChange, 
firePropertyChange, 
firePropertyChange, 
firePropertyChange, 
firePropertyChange, 
firePropertyChange, 
firePropertyChange, 
firePropertyChange, 
fireVetoableChange, 
getActionForKeyStroke, 
getAlignmentX, 
getAlignmentY, 
getAutoscrolls, 
getBorder, 
getBounds, 
getClientProperty, 
getComponentGraphics, 
getConditionForKeyStroke, 
getDebugGraphicsOptions, 
getGraphics, 
getHeight, 
getInsets, 
getInsets, 
getLocation, 
getMaximumSize, 
getMinimumSize, 
getNextFocusableComponent, 
getPreferredSize, 
getRegisteredKeyStrokes, 
getRootPane, 
getSize, 
getToolTipLocation, 
getToolTipText, 
getToolTipText, 
getTopLevelAncestor, 
getVisibleRect, 
getWidth, 
getX, 
getY, 
grabFocus, 
hasFocus, 
isDoubleBuffered, 
isFocusCycleRoot, 
isFocusTraversable, 
isLightweightComponent, 
isManagingFocus, 
isOpaque, 
isOptimizedDrawingEnabled, 
isPaintingTile, 
isRequestFocusEnabled, 
isValidateRoot, 
paintBorder, 
paintChildren, 
paintComponent, 
paintImmediately, 
paintImmediately, 
processComponentKeyEvent, 
processFocusEvent, 
processKeyEvent, 
processMouseMotionEvent, 
putClientProperty, 
registerKeyboardAction, 
registerKeyboardAction, 
removeAncestorListener, 
removeNotify, 
removePropertyChangeListener, 
removeVetoableChangeListener, 
repaint, 
repaint, 
requestDefaultFocus, 
requestFocus, 
resetKeyboardActions, 
reshape, 
revalidate, 
scrollRectToVisible, 
setAlignmentX, 
setAlignmentY, 
setAutoscrolls, 
setBackground, 
setBorder, 
setDebugGraphicsOptions, 
setDoubleBuffered, 
setEnabled, 
setFont, 
setForeground, 
setMaximumSize, 
setMinimumSize, 
setNextFocusableComponent, 
setOpaque, 
setPreferredSize, 
setRequestFocusEnabled, 
setToolTipText, 
setUI, 
setVisible, 
unregisterKeyboardAction

Methods inherited from class java.awt.Container

add, 
add, 
add, 
add, 
add, 
addContainerListener, 
addImpl, 
countComponents, 
deliverEvent, 
doLayout, 
findComponentAt, 
findComponentAt, 
getComponent, 
getComponentAt, 
getComponentAt, 
getComponentCount, 
getComponents, 
getLayout, 
insets, 
invalidate, 
isAncestorOf, 
layout, 
list, 
list, 
locate, 
minimumSize, 
paintComponents, 
preferredSize, 
print, 
printComponents, 
processContainerEvent, 
processEvent, 
remove, 
remove, 
removeAll, 
removeContainerListener, 
setLayout, 
validate, 
validateTree

Methods inherited from class java.awt.Component

action, 
add, 
addComponentListener, 
addFocusListener, 
addInputMethodListener, 
addKeyListener, 
addMouseListener, 
addMouseMotionListener, 
addPropertyChangeListener, 
bounds, 
checkImage, 
checkImage, 
coalesceEvents, 
contains, 
createImage, 
createImage, 
disable, 
disableEvents, 
dispatchEvent, 
enable, 
enable, 
enableEvents, 
enableInputMethods, 
getBackground, 
getBounds, 
getColorModel, 
getComponentOrientation, 
getCursor, 
getDropTarget, 
getFont, 
getFontMetrics, 
getForeground, 
getInputContext, 
getInputMethodRequests, 
getLocale, 
getLocation, 
getLocationOnScreen, 
getName, 
getParent, 
getPeer, 
getSize, 
getToolkit, 
getTreeLock, 
gotFocus, 
handleEvent, 
hide, 
imageUpdate, 
inside, 
isDisplayable, 
isEnabled, 
isLightweight, 
isShowing, 
isValid, 
isVisible, 
keyDown, 
keyUp, 
list, 
list, 
list, 
location, 
lostFocus, 
mouseDown, 
mouseDrag, 
mouseEnter, 
mouseExit, 
mouseMove, 
mouseUp, 
move, 
nextFocus, 
paintAll, 
postEvent, 
prepareImage, 
prepareImage, 
printAll, 
processComponentEvent, 
processInputMethodEvent, 
processMouseEvent, 
remove, 
removeComponentListener, 
removeFocusListener, 
removeInputMethodListener, 
removeKeyListener, 
removeMouseListener, 
removeMouseMotionListener, 
removePropertyChangeListener, 
repaint, 
repaint, 
repaint, 
resize, 
resize, 
setBounds, 
setBounds, 
setComponentOrientation, 
setCursor, 
setDropTarget, 
setLocale, 
setLocation, 
setLocation, 
setName, 
setSize, 
setSize, 
show, 
show, 
size, 
toString, 
transferFocus

Methods inherited from class java.lang.Object

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

Field Detail

image

public java.awt.Image image

The histogram diagram which will be drawn on the canvas

lowthresh

public int lowthresh

The low threshold value which must be indicated on the diagram

highthresh

public int highthresh

The high threshold value which must be indicated on the diagram

Constructor Detail

HistogramImageCanvas

public HistogramImageCanvas(java.awt.Image i)

Creates a canvas for the specified histogram diagram to appear on

Parameters:: image - The histogram diagram

Method Detail

paint

public void paint(java.awt.Graphics g)

Redraws the diagram and its border onto this canvas, with red lines at the threshold points

Parameters:: g - The graphics context of this canvas
Overrides:: paint in class NoScaleImageCanvas

update

public void update(java.awt.Graphics g)

Overrides update in the canvas super class so it redraws the image without blanking out the background first. This should stop flickering.

Parameters:: g - The graphics context of this canvas
Overrides:: update in class javax.swing.JComponent