jscicalc.DisplayLabel Class Reference

This is the part of the DisplayPanel that shows the output of calculations. More...

Inheritance diagram for jscicalc.DisplayLabel:

Collaboration diagram for jscicalc.DisplayLabel:

List of all members.

Public Member Functions

DisplayLabel (ReadOnlyDisplayPanel panel)

Constructor.

void setNewExpression ()

Set a new expression in the label.

void update (boolean on)

Update the display.

synchronized void setExpression (OObject o, int m, int precision, Base b, Notation n, double factor)

Set a new expression from an OObject.

synchronized void clear ()

Clear expression.

Base getBase ()

The DisplayFormat object has a Base, which ought to be the same as the CalculatorApplet Base and we use this to get it.

int getDigits ()

Get number of digits used.

void left ()

Scroll left if possible.

void right ()

Scroll right if possible.

Static Public Attributes

static final long BIAS = 1023

Standard constant for IEEE 754 doubles.

static final long E_MAX = 1023

Standard constant for IEEE 754 doubles.

static final long E_MIN = -1022

Standard constant for IEEE 754 doubles.

Protected Member Functions

void setCaretVisible (boolean b)

Change whether or not the caret should be shown, assuming permission is given.

Package Functions

final LeftOrRight getScrollDirections ()

Find the directions in which it is possible to scroll.

Private Attributes

DisplayCaret displayCaret

Keep a reference to the only Caret.

ScrollData scrollData

Holds data about where the expression is within the Jviewport.

boolean clearDisplay

private use for updating after cleared data

Static Private Attributes

static final int DIGITS = 20

Used to set number of digits in display.

static final String start

static final long serialVersionUID = 1L

Classes

class DisplayCaret

This is a local class that implements a default Caret. More...

class ScrollData

This class is used to hold the information required for scrolling left and right. More...

Detailed Description

This is the part of the DisplayPanel that shows the output of calculations.

Author:: J. D. Lamb

Version:

Revision: 1.11

Constructor & Destructor Documentation

jscicalc.DisplayLabel.DisplayLabel ( ReadOnlyDisplayPanel panel )

Constructor.

The object constructed should can read but not modify the DisplayPanel.

Parameters:

panel

The panel containing this

References jscicalc.DisplayLabel.clearDisplay, jscicalc.DisplayLabel.displayCaret, jscicalc.DisplayLabel.scrollData, jscicalc.DisplayLabel.setNewExpression(), and jscicalc.ScrollableLabel.textPane.

Member Function Documentation

void jscicalc.DisplayLabel.setNewExpression ( )

Set a new expression in the label.

References jscicalc.DisplayLabel.displayCaret, jscicalc.ReadOnlyCalculatorApplet.getAngleType(), jscicalc.ReadOnlyDisplayPanel.getApplet(), jscicalc.DisplayLabel.getBase(), jscicalc.DisplayLabel.getDigits(), jscicalc.ReadOnlyCalculatorApplet.getNotation(), jscicalc.ReadOnlyCalculatorApplet.getValue(), jscicalc.ScrollableLabel.panel, jscicalc.DisplayLabel.setExpression(), and jscicalc.DisplayLabel.DisplayCaret.updateFlag.

Referenced by jscicalc.DisplayLabel.DisplayLabel(), jscicalc.DisplayPanel.setValue(), and jscicalc.DisplayLabel.update().

void jscicalc.DisplayLabel.setCaretVisible ( boolean b ) [protected]

Change whether or not the caret should be shown, assuming permission is given.

This overrides base function so that caret is always invisible.

Parameters:

b

true if caret should be shown; false otherwise

Reimplemented from jscicalc.ScrollableLabel.

References jscicalc.ScrollableLabel.caretVisible, and jscicalc.ScrollableLabel.updateCaretVisibility().

void jscicalc.DisplayLabel.update ( boolean on ) [virtual]

Update the display.

The state should depend on whether the calculator is switched on and we ough to read this indirectly rather than pass the state as a parameter.

Parameters:

on

true if calculator switched on.

Implements jscicalc.ScrollableLabel.

References jscicalc.DisplayLabel.clear(), jscicalc.DisplayLabel.clearDisplay, jscicalc.DisplayLabel.displayCaret, jscicalc.ScrollableLabel.dotPosition, jscicalc.ScrollableLabel.expression, jscicalc.ReadOnlyDisplayPanel.getApplet(), jscicalc.ReadOnlyCalculatorApplet.getMode(), jscicalc.ScrollableLabel.panel, jscicalc.DisplayLabel.setNewExpression(), and jscicalc.ScrollableLabel.textPane.

Referenced by jscicalc.DisplayPanel.update().

synchronized void jscicalc.DisplayLabel.setExpression	(	OObject	o,
		int	m,
		int	precision,
		Base	b,
		Notation	n,
		double	factor
	)

Set a new expression from an OObject.

Parameters:

	o	The OObject to be displayed
	m	The number of digits (used by Complex)
	precision	The precision (used by Complex)
	b	The Base for numbers
	n	The Notation for numbers
	factor	Not currently used

References jscicalc.ReadOnlyCalculatorApplet.displayTextSize(), jscicalc.ScrollableLabel.dotPosition, jscicalc.Navigator.dots, jscicalc.ScrollableLabel.expression, jscicalc.ReadOnlyDisplayPanel.getApplet(), jscicalc.ScrollableLabel.navigator, jscicalc.ScrollableLabel.panel, jscicalc.DisplayLabel.start, and jscicalc.OObject.toHTMLStringVector().

Referenced by jscicalc.DisplayLabel.setNewExpression().

synchronized void jscicalc.DisplayLabel.clear ( )

Clear expression.

Useful in response to OnButton, for example.

References jscicalc.DisplayLabel.clearDisplay, jscicalc.ScrollableLabel.dotPosition, jscicalc.ScrollableLabel.expression, and jscicalc.DisplayLabel.start.

Referenced by jscicalc.DisplayLabel.update().

Base jscicalc.DisplayLabel.getBase ( )

The DisplayFormat object has a Base, which ought to be the same as the CalculatorApplet Base and we use this to get it.

Returns:: The Base of the DisplayFormat object.

References jscicalc.ReadOnlyDisplayPanel.getApplet(), jscicalc.ReadOnlyCalculatorApplet.getBase(), and jscicalc.ScrollableLabel.panel.

Referenced by jscicalc.DisplayLabel.setNewExpression().

int jscicalc.DisplayLabel.getDigits ( )

Get number of digits used.

I think this is a default number so we don’t overrun the display width.

Returns:: A number representing the number of digits in the display

References jscicalc.DisplayLabel.DIGITS.

Referenced by jscicalc.DisplayLabel.setNewExpression().

void jscicalc.DisplayLabel.left ( )

Scroll left if possible.

See also:: LeftButton
Navigator

Reimplemented from jscicalc.ScrollableLabel.

References jscicalc.DisplayLabel.ScrollData.left(), and jscicalc.DisplayLabel.scrollData.

void jscicalc.DisplayLabel.right ( )

Scroll right if possible.

See also:: RightButton
Navigator

Reimplemented from jscicalc.ScrollableLabel.

References jscicalc.DisplayLabel.ScrollData.right(), and jscicalc.DisplayLabel.scrollData.

final LeftOrRight jscicalc.DisplayLabel.getScrollDirections ( ) [package]

Find the directions in which it is possible to scroll.

Returns:: The directions in which it is possible to scroll

References jscicalc.DisplayLabel.ScrollData.getScrollDirections(), and jscicalc.DisplayLabel.scrollData.

Referenced by jscicalc.DisplayPanel.displayLabelScrollable(), and jscicalc.DisplayPanel.update().

Member Data Documentation

DisplayCaret jscicalc.DisplayLabel.displayCaret [private]

Keep a reference to the only Caret.

Referenced by jscicalc.DisplayLabel.DisplayLabel(), jscicalc.DisplayLabel.setNewExpression(), and jscicalc.DisplayLabel.update().

ScrollData jscicalc.DisplayLabel.scrollData [private]

Holds data about where the expression is within the Jviewport.

Referenced by jscicalc.DisplayLabel.DisplayLabel(), jscicalc.DisplayLabel.getScrollDirections(), jscicalc.DisplayLabel.left(), and jscicalc.DisplayLabel.right().

boolean jscicalc.DisplayLabel.clearDisplay [private]

private use for updating after cleared data

Referenced by jscicalc.DisplayLabel.clear(), jscicalc.DisplayLabel.DisplayLabel(), and jscicalc.DisplayLabel.update().

final long jscicalc.DisplayLabel.BIAS = 1023 [static]

Standard constant for IEEE 754 doubles.

final long jscicalc.DisplayLabel.E_MAX = 1023 [static]

Standard constant for IEEE 754 doubles.

final long jscicalc.DisplayLabel.E_MIN = -1022 [static]

Standard constant for IEEE 754 doubles.

final int jscicalc.DisplayLabel.DIGITS = 20 [static, private]

Used to set number of digits in display.

Referenced by jscicalc.DisplayLabel.getDigits().

final String jscicalc.DisplayLabel.start [static, private]

Initial value:

 "<sub>&nbsp;</sub>&nbsp;<sup>&nbsp;</sup>&nbsp;&nbsp;&nbsp;" 
        + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"
        + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"
        + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"
        + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"

Referenced by jscicalc.DisplayLabel.clear(), and jscicalc.DisplayLabel.setExpression().

final long jscicalc.DisplayLabel.serialVersionUID = 1L [static, private]

Reimplemented from jscicalc.ScrollableLabel.

The documentation for this class was generated from the following file:

DisplayLabel.java


Public Member Functions
	DisplayLabel (ReadOnlyDisplayPanel panel)
	Constructor.
void	setNewExpression ()
	Set a new expression in the label.
void	update (boolean on)
	Update the display.
synchronized void	setExpression (OObject o, int m, int precision, Base b, Notation n, double factor)
	Set a new expression from an OObject.
synchronized void	clear ()
	Clear expression.
Base	getBase ()
	The DisplayFormat object has a Base, which ought to be the same as the CalculatorApplet Base and we use this to get it.
int	getDigits ()
	Get number of digits used.
void	left ()
	Scroll left if possible.
void	right ()
	Scroll right if possible.
Static Public Attributes
static final long	BIAS = 1023
	Standard constant for IEEE 754 doubles.
static final long	E_MAX = 1023
	Standard constant for IEEE 754 doubles.
static final long	E_MIN = -1022
	Standard constant for IEEE 754 doubles.
Protected Member Functions
void	setCaretVisible (boolean b)
	Change whether or not the caret should be shown, assuming permission is given.
Package Functions
final LeftOrRight	getScrollDirections ()
	Find the directions in which it is possible to scroll.
Private Attributes
DisplayCaret	displayCaret
	Keep a reference to the only Caret.
ScrollData	scrollData
	Holds data about where the expression is within the Jviewport.
boolean	clearDisplay
	private use for updating after cleared data
Static Private Attributes
static final int	DIGITS = 20
	Used to set number of digits in display.
static final String	start
static final long	serialVersionUID = 1L
Classes
class	DisplayCaret
	This is a local class that implements a default Caret. More...
class	ScrollData
	This class is used to hold the information required for scrolling left and right. More...