rvl.awt
Class DoubleField

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.TextComponent
              |
              +--java.awt.TextField
                    |
                    +--rvl.awt.DoubleField

All Implemented Interfaces:

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

public class DoubleField

extends java.awt.TextField

implements java.awt.event.FocusListener

GUI component for I/O of double-precision numbers. Also generates an event if RETURN is pressed or focus is lost after value has changed

See Also:

Serialized Form

Inner classes inherited from class java.awt.TextField

java.awt.TextField.AccessibleAWTTextField

Inner classes inherited from class java.awt.TextComponent

java.awt.TextComponent.AccessibleAWTTextComponent

Inner classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent

Fields inherited from class java.awt.TextComponent

textListener

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

DoubleField(double x)

DoubleField(double x, int width)
Double field with the default of 3 digits

DoubleField(double x, int width, int dig)

DoubleField(java.lang.String msg, int width)
Initialize like a Textfield (initial value is Double.NaN)

Method Summary

void	focusGained(java.awt.event.FocusEvent e) Handle focus events (1.1 model)
void	focusLost(java.awt.event.FocusEvent e)
double	getValue()
boolean	gotFocus(java.awt.Event e, java.lang.Object o) Interpret focus events (1.0 model)
boolean	keyDown(java.awt.Event evt, int key) Look for RETURN key to create an event, else pass on to superclass
boolean	lostFocus(java.awt.Event e, java.lang.Object o)
void	setValue(double x)

Methods inherited from class java.awt.TextField

addActionListener, addNotify, echoCharIsSet, getAccessibleContext, getColumns, getEchoChar, getListeners, getMinimumSize, getMinimumSize, getPreferredSize, getPreferredSize, minimumSize, minimumSize, paramString, preferredSize, preferredSize, processActionEvent, processEvent, removeActionListener, setColumns, setEchoChar, setEchoCharacter, setText

Methods inherited from class java.awt.TextComponent

addTextListener, getBackground, getCaretPosition, getSelectedText, getSelectionEnd, getSelectionStart, getText, isEditable, processTextEvent, removeNotify, removeTextListener, select, selectAll, setBackground, setCaretPosition, setEditable, setSelectionEnd, setSelectionStart

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, 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, getBounds, getBounds, getColorModel, getComponentAt, getComponentAt, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getInputContext, getInputMethodRequests, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getName, getParent, getPeer, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, handleEvent, hasFocus, hide, imageUpdate, inside, invalidate, isDisplayable, isDoubleBuffered, isEnabled, isFocusTraversable, isLightweight, isOpaque, isShowing, isValid, isVisible, keyUp, layout, list, list, list, list, list, locate, location, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paint, paintAll, postEvent, prepareImage, prepareImage, print, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, reshape, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFont, setForeground, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, update, validate

Methods inherited from class java.lang.Object

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

Constructor Detail

DoubleField

public DoubleField(double x)

Parameters:

x - initial value

DoubleField

public DoubleField(double x,
                   int width)

Double field with the default of 3 digits

Parameters:

x - initial value

width - width of field (approx # characters)

DoubleField

public DoubleField(double x,
                   int width,
                   int dig)

Parameters:

x - initial value

width - width of field (approx # characters)

dig - number of digits (allow 7 spaces in width for exponents and signs)

DoubleField

public DoubleField(java.lang.String msg,
                   int width)

Initialize like a Textfield (initial value is Double.NaN)

Parameters:

width - width of field (approx # characters)

Method Detail

setValue

public void setValue(double x)

Parameters:

x - new value to put in window

getValue

public double getValue()

Returns:

current value in window (or NaN if invalid)

keyDown

public boolean keyDown(java.awt.Event evt,
                       int key)

Look for RETURN key to create an event, else pass on to superclass

Overrides:

keyDown in class java.awt.Component

gotFocus

public boolean gotFocus(java.awt.Event e,
                        java.lang.Object o)

Interpret focus events (1.0 model)

Overrides:

gotFocus in class java.awt.Component

lostFocus

public boolean lostFocus(java.awt.Event e,
                         java.lang.Object o)

Overrides:

lostFocus in class java.awt.Component

focusGained

public void focusGained(java.awt.event.FocusEvent e)

Handle focus events (1.1 model)

Specified by:

focusGained in interface java.awt.event.FocusListener

focusLost

public void focusLost(java.awt.event.FocusEvent e)

Specified by:

focusLost in interface java.awt.event.FocusListener