rvl.awt
Class Bar

java.lang.Object
  java.awt.Component
      java.awt.Canvas
          rvl.awt.Bar

All Implemented Interfaces:

java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, javax.accessibility.Accessible

public class Bar
extends java.awt.Canvas

GUI object for implementing a bar-graph-style method for I/O of nonnegative quantities. A single mouse click in the active range will set its value.
Typically, several Bar objects will be stacked in a single panel. They share a common scale determined by the BarGroup object passed in the constructor. You will probably want to add the associated BarGroup to the same panel, since it shows the scale values.

See Also:

BarGroup, 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 java.awt.event.ActionListener

actionListener

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

Bar(java.lang.Object ID, double val, BarGroup grp)

Bar(java.lang.Object ID, int val, BarGroup grp)

Method Summary

void	addActionListener(java.awt.event.ActionListener l)
int	getIntVal()
double	getValue()
java.awt.Dimension	minimumSize()
boolean	mouseDown(java.awt.Event e, int x, int y) public boolean mouseMove(Event e, int x, int y) { if (isHot(x,y)) group.parentFrame.setCursor(Frame.CROSSHAIR_CURSOR); else group.parentFrame.setCursor(Frame.DEFAULT_CURSOR); return true; }
boolean	mouseDrag(java.awt.Event e, int x, int y)
boolean	mouseEnter(java.awt.Event e, int x, int y)
boolean	mouseExit(java.awt.Event e, int x, int y)
boolean	mouseUp(java.awt.Event e, int x, int y)
void	paint(java.awt.Graphics g)
java.awt.Dimension	preferredSize()
void	setValue(double v)
void	setValue(int v)

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, mouseMove, move, nextFocus, paintAll, paramString, postEvent, 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

actionListener

protected transient java.awt.event.ActionListener actionListener

Constructor Detail

Bar

public Bar(java.lang.Object ID,
           double val,
           BarGroup grp)

Parameters:

ID - object that will be passed as event-handler argument when a new value is selected

val - initial value

grp - which bar group is used for scaling

Bar

public Bar(java.lang.Object ID,
           int val,
           BarGroup grp)

Parameters:

ID - object that will be passed as event-handler argument when a new value is selected

val - initial value

grp - which bar group is used for scaling

Method Detail

addActionListener

public void addActionListener(java.awt.event.ActionListener l)

getValue

public double getValue()

getIntVal

public int getIntVal()

setValue

public void setValue(double v)

setValue

public void setValue(int v)

preferredSize

public java.awt.Dimension preferredSize()

Overrides:

preferredSize in class java.awt.Component

minimumSize

public java.awt.Dimension minimumSize()

Overrides:

minimumSize in class java.awt.Component

paint

public void paint(java.awt.Graphics g)

Overrides:

paint in class java.awt.Canvas

mouseEnter

public boolean mouseEnter(java.awt.Event e,
                          int x,
                          int y)

Overrides:

mouseEnter in class java.awt.Component

mouseExit

public boolean mouseExit(java.awt.Event e,
                         int x,
                         int y)

Overrides:

mouseExit in class java.awt.Component

mouseDown

public boolean mouseDown(java.awt.Event e,
                         int x,
                         int y)

public boolean mouseMove(Event e, int x, int y) { if (isHot(x,y)) group.parentFrame.setCursor(Frame.CROSSHAIR_CURSOR); else group.parentFrame.setCursor(Frame.DEFAULT_CURSOR); return true; }

Overrides:

mouseDown in class java.awt.Component

mouseUp

public boolean mouseUp(java.awt.Event e,
                       int x,
                       int y)

Overrides:

mouseUp in class java.awt.Component

mouseDrag

public boolean mouseDrag(java.awt.Event e,
                         int x,
                         int y)

Overrides:

mouseDrag in class java.awt.Component