jwo.utils
Class JWColourRing

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Canvas
              |
              +--jwo.utils.JWColourRing

All Implemented Interfaces:

Accessible, EventListener, ImageObserver, MenuContainer, MouseListener, MouseMotionListener, Serializable

public class JWColourRing

extends Canvas

implements MouseListener, MouseMotionListener

Creates a colour ring for displaying HSV colour space.

Version:

1.8.0, 23rd June, 2000

Author:

Jo Wood

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class java.awt.Canvas

Canvas.AccessibleAWTCanvas

Nested classes inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

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

JWColourRing(int radius)
Creates a hue colour ring surrounding a saturation- brightness square.

JWColourRing(int radius, Color colour)
Creates a hue colour ring surrounding a saturation- brightness square.

Method Summary

Color	getColour() Reports the currently selected colour.
Dimension	getMinimumSize() Determines the minimum size of the bean.
Dimension	getPreferredSize() Determines the preferred size of the bean.
void	mouseClicked(MouseEvent mouseEvent) Checks for mouse clicks, but does nothing.
void	mouseDragged(MouseEvent mouseEvent) Checks for mouse drag and continuously changes selected colour.
void	mouseEntered(MouseEvent mouseEvent) Checks for pointer entering event, but does nothing.
void	mouseExited(MouseEvent mouseEvent) Checks for pointer exiting event, but does nothing.
void	mouseMoved(MouseEvent mouseEvent) Checks for mouse movement, but does nothing.
void	mousePressed(MouseEvent mouseEvent) Checks for mouse button press, changes colour selected.
void	mouseReleased(MouseEvent mouseEvent) Checks for mouse button release and turns off mouse movement query.
void	paint(Graphics g) Paints colour ring onto the canvas.
void	setColour(Color newColour) Sets the currently selected colour to a given value.
void	update(Graphics g) Overrides the update method to stop the screen from being recleared each time.

Methods inherited from class java.awt.Canvas

addNotify, createBufferStrategy, createBufferStrategy, getAccessibleContext, getBufferStrategy

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, deliverEvent, disable, disableEvents, dispatchEvent, doLayout, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, getAlignmentX, getAlignmentY, getBackground, getBounds, getBounds, getColorModel, getComponentAt, getComponentAt, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeys, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getListeners, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, invalidate, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusCycleRoot, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isOpaque, isShowing, isValid, isVisible, keyDown, keyUp, layout, list, list, list, list, list, locate, location, lostFocus, minimumSize, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, paramString, postEvent, preferredSize, prepareImage, prepareImage, print, printAll, processComponentEvent, processEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeys, setFocusTraversalKeysEnabled, setFont, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle, validate

Methods inherited from class java.lang.Object

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

Constructor Detail

JWColourRing

public JWColourRing(int radius)

Creates a hue colour ring surrounding a saturation- brightness square. Initialises with a default colour.

Parameters:

radius - Radius of colour ring in pixels.

JWColourRing

public JWColourRing(int radius,
                    Color colour)

Creates a hue colour ring surrounding a saturation- brightness square. Initialises with a given colour.

Parameters:

radius - Radius of colour ring in pixels.

Method Detail

getColour

public Color getColour()

Reports the currently selected colour.

Returns:

Currently selected colour.

setColour

public void setColour(Color newColour)

Sets the currently selected colour to a given value.

Parameters:

newColour - New colour to store.

getPreferredSize

public Dimension getPreferredSize()

Determines the preferred size of the bean. This is also the initial and minimum size.

Overrides:

getPreferredSize in class Component

Returns:

Preferred size of the bean.

getMinimumSize

public Dimension getMinimumSize()

Determines the minimum size of the bean.

Overrides:

getMinimumSize in class Component

Returns:

Minimum size of the bean.

update

public void update(Graphics g)

Overrides the update method to stop the screen from being recleared each time.

Overrides:

update in class Canvas

Parameters:

g - Graphics context to paint to.

paint

public void paint(Graphics g)

Paints colour ring onto the canvas. Overrides the paint() method.

Overrides:

paint in class Canvas

Parameters:

g - The graphics context to paint to.

mouseClicked

public void mouseClicked(MouseEvent mouseEvent)

Checks for mouse clicks, but does nothing. Implements interface method.

Specified by:

mouseClicked in interface MouseListener

Parameters:

mouseEvent - Mouse click event.

mousePressed

public void mousePressed(MouseEvent mouseEvent)

Checks for mouse button press, changes colour selected. Implements interface method.

Specified by:

mousePressed in interface MouseListener

Parameters:

mouseEvent - Mouse press event.

mouseReleased

public void mouseReleased(MouseEvent mouseEvent)

Checks for mouse button release and turns off mouse movement query.

Specified by:

mouseReleased in interface MouseListener

Parameters:

mouseEvent - Mouse release event.

mouseMoved

public void mouseMoved(MouseEvent mouseEvent)

Checks for mouse movement, but does nothing.

Specified by:

mouseMoved in interface MouseMotionListener

Parameters:

mouseEvent - Mouse movement event.

mouseEntered

public void mouseEntered(MouseEvent mouseEvent)

Checks for pointer entering event, but does nothing.

Specified by:

mouseEntered in interface MouseListener

Parameters:

mouseEvent - Pointer entering event.

mouseExited

public void mouseExited(MouseEvent mouseEvent)

Checks for pointer exiting event, but does nothing.

Specified by:

mouseExited in interface MouseListener

Parameters:

mouseEvent - Mouse exiting event.

mouseDragged

public void mouseDragged(MouseEvent mouseEvent)

Checks for mouse drag and continuously changes selected colour.

Specified by:

mouseDragged in interface MouseMotionListener

Parameters:

mouseEvent - Mouse press event.