com.softsynth.jmsl.view
Class JMSLScrollbar

java.lang.Object
  java.awt.Component
      java.awt.Canvas
          com.softsynth.jmsl.view.JMSLScrollbar

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 JMSLScrollbar
extends java.awt.Canvas
implements java.awt.event.MouseListener, java.awt.event.MouseMotionListener

Our own horizontal scrollbar, subclass of canvas, which uses JMSLScrollbarProcessor interface to communicate with parent.

Example:

 
  
   // A new scrollbar with parent, with default value 50, min value 0, max value 100
   // Assumes "this" is a class that implements JMSLScrollbarProcessor
   myScrollbar = new JMSLScrollbar(this, 50, 0, 100);
  
   // set the graphic size of the scrollbar
   myScrollbar.setSize(320, 25);
  
   // set the increment that the value will jump when user clicks inside scrollbar
   myScrollbar.setPageIncrement(10);
  
   // set the increment that the value will jump when user clicks on arrows of scrollbar
   myScrollbar.setLineIncrement(1);
  
   // add it to layout
   add(myScrollbar);
  
   ...
   
  
 

Parent must implement public void JMSLScrollbarValueChanged(JMSLScrollbar jsb) to be notified of the scrollbar's value changing.
Example:

 public void JMSLScrollbarValueChanged(JMSLScrollbar jsb) {
     if (jsb == myScrollbar) {
         System.out.println("Value = " + myScrollbar.getValue());
     }
 }
 

Author:

Nick Didkovsky, copyright 1999 Nick Didkovsky

See Also:

Serialized Form

Field Summary

static int	HORIZONTAL unused - presently always horizontal
static int	VERTICAL unused - presently always horizontal

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

JMSLScrollbar()

JMSLScrollbar(JMSLScrollbarProcessor par, int v, int min, int max)
Constructor with parent who will receive notification of value change, initial value, min value, max value.

Method Summary

int	getLineIncrement()
int	getMax()
int	getMin()
int	getPageIncrement()
int	getValue()
static void	main(java.lang.String[] args)
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)
void	setArrowColor(java.awt.Color c)
void	setBevelColor1(java.awt.Color c)
void	setBevelColor2(java.awt.Color c)
void	setLineIncrement(int v) Set how much the value jumps when click on leftmost or rightmost arrow.
void	setMax(int max) set the max value for this scrollbar
void	setMin(int min) set the min value for this scrollbar
void	setPageIncrement(int v) Set how much the value jumps when click to left or right of slider.
void	setScrollbarBackgroundColor(java.awt.Color c)
void	setSize(int w, int h) reshape size of scrollbar
void	setValue(int v)
void	setValues(int v, int min, int max) Set current value, minimum value, maximum value of scrollbar
void	update(java.awt.Graphics g)

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, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, deliverEvent, disable, dispatchEvent, doLayout, enable, enable, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, 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, 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, postEvent, preferredSize, prepareImage, prepareImage, print, printAll, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, 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, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle, validate

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

HORIZONTAL

public static final int HORIZONTAL

unused - presently always horizontal

See Also:

Constant Field Values

VERTICAL

public static final int VERTICAL

unused - presently always horizontal

See Also:

Constant Field Values

Constructor Detail

JMSLScrollbar

public JMSLScrollbar()

JMSLScrollbar

public JMSLScrollbar(JMSLScrollbarProcessor par,
                     int v,
                     int min,
                     int max)

Constructor with parent who will receive notification of value change, initial value, min value, max value. LineIncrement defaults to 1, PageIncrement defaults to 10 (see setLineIncrement() and setPageIncrement() below)

Method Detail

setArrowColor

public void setArrowColor(java.awt.Color c)

setBevelColor1

public void setBevelColor1(java.awt.Color c)

setBevelColor2

public void setBevelColor2(java.awt.Color c)

setScrollbarBackgroundColor

public void setScrollbarBackgroundColor(java.awt.Color c)

setValues

public void setValues(int v,
                      int min,
                      int max)

Set current value, minimum value, maximum value of scrollbar

setMin

public void setMin(int min)

set the min value for this scrollbar

setMax

public void setMax(int max)

set the max value for this scrollbar

getMin

public int getMin()

Returns:

min value for this scrollbar

getMax

public int getMax()

Returns:

max value for this scrollbar

setSize

public void setSize(int w,
                    int h)

reshape size of scrollbar

Overrides:

setSize in class java.awt.Component

setPageIncrement

public void setPageIncrement(int v)

Set how much the value jumps when click to left or right of slider. Default is 10

getPageIncrement

public int getPageIncrement()

setLineIncrement

public void setLineIncrement(int v)

Set how much the value jumps when click on leftmost or rightmost arrow. Default is 1

getLineIncrement

public int getLineIncrement()

getValue

public int getValue()

Returns:

Scrollbar's current value

setValue

public void setValue(int v)

update

public void update(java.awt.Graphics g)

Overrides:

update in class java.awt.Canvas

paint

public void paint(java.awt.Graphics g)

Overrides:

paint in class java.awt.Canvas

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

mouseClicked

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

Specified by:

mouseClicked 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

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

main

public static void main(java.lang.String[] args)