: Class TextScrollerCanvas

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jclass
Class TextScrollerCanvas

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Canvas
              |
              +--jclass.TextScrollerCanvas

public class TextScrollerCanvas
extends java.awt.Canvas

A canvas that scrolls a text from left to right ...
The font that is used on the canvas has to set before scrolling.

Written: Radu Sion
Version: 0.12
Source: TextScrollerCanvas.java

Visit Smart Software

See Also:: Serialized Form

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT,  
CENTER_ALIGNMENT,  
LEFT_ALIGNMENT,  
RIGHT_ALIGNMENT,  
TOP_ALIGNMENT

Constructor Summary
`TextScrollerCanvas(java.lang.String scrolltext, int pixelinc)` Creates a new scroller canvas that should scroll the specified text by using the specified increment in pixels between moves.

Method Summary
`void`	`paint(java.awt.Graphics gr)` Does a scroll step.
`void`	`setText(java.lang.String scrolltext)` Sets a new text to be displayed from now on.
`void`	`update(java.awt.Graphics g)` The update method uses an off-screen drawing area to reduce text fliker

Methods inherited from class java.awt.Canvas

addNotify

Methods inherited from class java.awt.Component

action, 
add, 
addComponentListener, 
addFocusListener, 
addInputMethodListener, 
addKeyListener, 
addMouseListener, 
addMouseMotionListener, 
addPropertyChangeListener, 
addPropertyChangeListener, 
bounds, 
checkImage, 
checkImage, 
coalesceEvents, 
contains, 
contains, 
createImage, 
createImage, 
deliverEvent, 
disable, 
disableEvents, 
dispatchEvent, 
doLayout, 
enable, 
enable, 
enableEvents, 
enableInputMethods, 
firePropertyChange, 
getAlignmentX, 
getAlignmentY, 
getBackground, 
getBounds, 
getBounds, 
getColorModel, 
getComponentAt, 
getComponentAt, 
getComponentOrientation, 
getCursor, 
getDropTarget, 
getFont, 
getFontMetrics, 
getForeground, 
getGraphics, 
getHeight, 
getInputContext, 
getInputMethodRequests, 
getLocale, 
getLocation, 
getLocation, 
getLocationOnScreen, 
getMaximumSize, 
getMinimumSize, 
getName, 
getParent, 
getPeer, 
getPreferredSize, 
getSize, 
getSize, 
getToolkit, 
getTreeLock, 
getWidth, 
getX, 
getY, 
gotFocus, 
handleEvent, 
hasFocus, 
hide, 
imageUpdate, 
inside, 
invalidate, 
isDisplayable, 
isDoubleBuffered, 
isEnabled, 
isFocusTraversable, 
isLightweight, 
isOpaque, 
isShowing, 
isValid, 
isVisible, 
keyDown, 
keyUp, 
layout, 
list, 
list, 
list, 
ist, 
list, 
locate, 
location, 
lostFocus, 
minimumSize, 
mouseDown, 
mouseDrag, 
mouseEnter, 
mouseExit, 
mouseMove, 
mouseUp, 
move, 
nextFocus, 
paintAll, 
paramString, 
postEvent, 
preferredSize, 
prepareImage, 
prepareImage, 
print, 
printAll, 
processComponentEvent, 
processEvent, 
processFocusEvent, 
processInputMethodEvent, 
processKeyEvent, 
processMouseEvent, 
processMouseMotionEvent, 
remove, 
removeComponentListener, 
removeFocusListener, 
removeInputMethodListener, 
removeKeyListener, 
removeMouseListener, 
removeMouseMotionListener, 
removeNotify, 
removePropertyChangeListener, 
removePropertyChangeListener, 
repaint, 
repaint, 
repaint, 
repaint, 
requestFocus, 
reshape, 
resize, 
resize, 
setBackground, 
setBounds, 
setBounds, 
setComponentOrientation, 
setCursor, 
setDropTarget, 
setEnabled, 
setFont, 
setForeground, 
setLocale, 
setLocation, 
setLocation, 
setName, 
setSize, 
setSize, 
setVisible, 
show, 
show, 
size, 
toString, 
transferFocus, 
validate

Methods inherited from class java.lang.Object

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

Constructor Detail

TextScrollerCanvas

public TextScrollerCanvas(java.lang.String scrolltext,
                          int pixelinc)

Creates a new scroller canvas that should scroll the specified text by using the specified increment in pixels between moves. No parameter checkings performed.

Parameters:: scrolltext - Text to scroll; pixelinc - How many pixels to shift the text from one move to another

Method Detail

setText

public void setText(java.lang.String scrolltext)

Sets a new text to be displayed from now on. Resets the step counter.

Parameters:: scrolltext - New text to scroll

paint

public void paint(java.awt.Graphics gr)

Does a scroll step.

Overrides:: paint in class java.awt.Canvas

update

public void update(java.awt.Graphics g)

The update method uses an off-screen drawing area to reduce text fliker

Overrides:: update in class java.awt.Component