: Class ImageCanvas

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Class ImageCanvas

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

public class ImageCanvas
extends javax.swing.JLabel

ImageCanvas simply ties an image to a canvas, waits until its size is known, resizes the canvas and later updates the onscreen image.

Author:: Timothy Sharman
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
`protected int`	`image_height`
`protected int`	`image_width` The image drawn to this canvas
`ImageTools`	`imageTools` Various tools for manipulating images.

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
`ImageCanvas(java.awt.Image image)` Creates a new image canvas to draw the specified image

Method Summary
`int`	`getImageHeight()` Returns the image height
`int`	`getImageWidth()` Returns the image width
`javax.swing.ImageIcon`	`imageScale(javax.swing.ImageIcon unscaledpic)` Scales the image
`void`	`paint(java.awt.Graphics g)` Redefined paint method
`void`	`updateImage(java.awt.Image image)` Allows the updating of the image on the canvas

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, 
update

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_width

protected int image_width

The image drawn to this canvas

image_height

protected int image_height

imageTools

public ImageTools imageTools

Various tools for manipulating images.

Constructor Detail

ImageCanvas

public ImageCanvas(java.awt.Image image)

Creates a new image canvas to draw the specified image

Parameters:: image - The image to be drawn

Method Detail

updateImage

public void updateImage(java.awt.Image image)

Allows the updating of the image on the canvas

Parameters:: image - The image to be drawn

getImageWidth

public int getImageWidth()

Returns the image width

Returns:: image_width the image width

getImageHeight

public int getImageHeight()

Returns the image height

Returns:: image_height the image height

paint

public void paint(java.awt.Graphics g)

Redefined paint method

Parameters:: g - The graphics context
Overrides:: paint in class javax.swing.JComponent

imageScale

public javax.swing.ImageIcon imageScale(javax.swing.ImageIcon unscaledpic)

Scales the image

Parameters:: unscaledpic - The unscaled image
Returns:: scaledpic The scaled image