Class BabylonCanvas

java.lang.Object
  java.awt.Component
      java.awt.Canvas
          BabylonCanvas

All Implemented Interfaces:

java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, java.util.EventListener, javax.accessibility.Accessible

public class BabylonCanvas
extends java.awt.Canvas
implements java.awt.event.MouseListener, java.awt.event.MouseMotionListener

This class is the whiteboard drawing canvas of the chat client.

Author:

Andy McLaughlin

See Also:

Serialized Form

Nested Class Summary

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

java.awt.Canvas.AccessibleAWTCanvas

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

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BaselineResizeBehavior, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

protected static java.awt.Color[]	colourArray
protected java.awt.Color	drawColor
protected int	drawThickness
protected int	drawType
protected boolean	fill
protected static int	FREEHAND
protected static int	LINE
protected static int	MODE_PAINT
protected static int	MODE_XOR
protected static int	OVAL
protected static int	RECTANGLE
protected static int	TEXT

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

BabylonCanvas(BabylonPanel parent)

Method Summary

protected void	clear()
protected void	drawImage(int x, int y, java.awt.Image picture)
protected void	drawLine(java.awt.Color color, int startX, int startY, int endX, int endY, int thickness, int mode)
protected void	drawOval(java.awt.Color color, int x, int y, int width, int height, boolean filled, int thickness, int mode)
protected void	drawRect(java.awt.Color color, int x, int y, int width, int height, boolean filled, int thickness, int mode)
protected void	drawText(java.awt.Color color, int x, int y, int fontnumber, int attribs, int size, java.lang.String text, int mode)
protected void	floatPicture(java.io.File pictureFile) The user wants to paste a picture onto the canvas.
protected java.awt.image.BufferedImage	getContents() Returns the contents of the canvas as an Image.
void	mouseClicked(java.awt.event.MouseEvent E)
void	mouseDragged(java.awt.event.MouseEvent E)
void	mouseEntered(java.awt.event.MouseEvent E)
void	mouseExited(java.awt.event.MouseEvent E)
void	mouseMoved(java.awt.event.MouseEvent E)
void	mousePressed(java.awt.event.MouseEvent E)
void	mouseReleased(java.awt.event.MouseEvent E)
void	paint(java.awt.Graphics g)

Methods inherited from class java.awt.Canvas

addNotify, createBufferStrategy, createBufferStrategy, getAccessibleContext, getBufferStrategy, update

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, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getAlignmentX, getAlignmentY, getBackground, getBaseline, getBaselineResizeBehavior, 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, getMinimumSize, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPreferredSize, 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, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, 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, setMaximumSize, setMinimumSize, setName, setPreferredSize, 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

Field Detail

FREEHAND

protected static final int FREEHAND

See Also:

Constant Field Values

LINE

protected static final int LINE

See Also:

Constant Field Values

OVAL

protected static final int OVAL

See Also:

Constant Field Values

RECTANGLE

protected static final int RECTANGLE

See Also:

Constant Field Values

TEXT

protected static final int TEXT

See Also:

Constant Field Values

MODE_PAINT

protected static final int MODE_PAINT

See Also:

Constant Field Values

MODE_XOR

protected static final int MODE_XOR

See Also:

Constant Field Values

drawThickness

protected int drawThickness

fill

protected boolean fill

drawColor

protected java.awt.Color drawColor

drawType

protected int drawType

colourArray

protected static java.awt.Color[] colourArray

Constructor Detail

BabylonCanvas

public BabylonCanvas(BabylonPanel parent)

Method Detail

getContents

protected java.awt.image.BufferedImage getContents()

Returns the contents of the canvas as an Image. Only returns the portion which is actually showing on the screen.

floatPicture

protected void floatPicture(java.io.File pictureFile)

The user wants to paste a picture onto the canvas. The user needs to specify the location of the picture on the canvas, so we draw an empty draft rectangle which follows the mouse cursor until a click is entered to place it.

paint

public void paint(java.awt.Graphics g)

Overrides:

paint in class java.awt.Canvas

clear

protected void clear()

drawLine

protected void drawLine(java.awt.Color color,
                        int startX,
                        int startY,
                        int endX,
                        int endY,
                        int thickness,
                        int mode)

drawOval

protected void drawOval(java.awt.Color color,
                        int x,
                        int y,
                        int width,
                        int height,
                        boolean filled,
                        int thickness,
                        int mode)

drawRect

protected void drawRect(java.awt.Color color,
                        int x,
                        int y,
                        int width,
                        int height,
                        boolean filled,
                        int thickness,
                        int mode)

drawText

protected void drawText(java.awt.Color color,
                        int x,
                        int y,
                        int fontnumber,
                        int attribs,
                        int size,
                        java.lang.String text,
                        int mode)

drawImage

protected void drawImage(int x,
                         int y,
                         java.awt.Image picture)

mouseClicked

public void mouseClicked(java.awt.event.MouseEvent E)

Specified by:

mouseClicked in interface java.awt.event.MouseListener

mouseEntered

public void mouseEntered(java.awt.event.MouseEvent E)

Specified by:

mouseEntered in interface java.awt.event.MouseListener

mouseExited

public void mouseExited(java.awt.event.MouseEvent E)

Specified by:

mouseExited in interface java.awt.event.MouseListener

mousePressed

public void mousePressed(java.awt.event.MouseEvent E)

Specified by:

mousePressed in interface java.awt.event.MouseListener

mouseReleased

public void mouseReleased(java.awt.event.MouseEvent E)

Specified by:

mouseReleased in interface java.awt.event.MouseListener

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent E)

Specified by:

mouseDragged in interface java.awt.event.MouseMotionListener

mouseMoved

public void mouseMoved(java.awt.event.MouseEvent E)

Specified by:

mouseMoved in interface java.awt.event.MouseMotionListener