Class Bar

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Canvas
                   |
                   +----Bar

class Bar

extends Canvas

Bar(int, int)

Constructs a Bar with button count and direction

clearCell(Graphics, int)

clear button

getButtonIndex(int, int)

get button's index by position

getCellInterior(int, boolean)

get drawing area of a button

getCellPos(int)

get left top point of button's area

getCellRect(int)

get area of a button

getDimension()

isButtonUp(int)

return the button state

mouseDown(Event, int, int)

mouseMove(Event, int, int)

paint(Graphics)

set help string

pressButton(int)

called when mouse downd the button

  public Bar(int count,
             int direction)

Constructs a Bar with button count and direction

Parameters:

count - : button's count

direction - : bars direction (VERTICAL, HORIZONTAL)

  public abstract void pressButton(int i)

called when mouse downd the button

Parameters:

g - : graphics

i - : button index in Bar

rc - : drawing area

  public abstract boolean isButtonUp(int i)

return the button state

Parameters:

i - : button index in Bar

Returns:

: true if button is up state

  public Dimension getDimension()

  public void paint(Graphics g)

set help string

Parameters:

help - : help String

Overrides:

paint in class Canvas

  public void clearCell(Graphics g,
                        int i)

clear button

Parameters:

g - : graphics

i - : button index in Bar

  public Rectangle getCellRect(int i)

get area of a button

Parameters:

i - : button index in Bar

Returns:

button's area

  public Rectangle getCellInterior(int i,
                                   boolean isUp)

get drawing area of a button

Parameters:

i - : button index in Bar

isUp - : state of button

Returns:

button's area

  public Point getCellPos(int i)

get left top point of button's area

Parameters:

i - : button index in Bar

Returns:

left top point of button's area

  protected int getButtonIndex(int x,
                               int y)

get button's index by position

Parameters:

x: - x position

y: - y position

Returns:

button's index

  public boolean mouseDown(Event e,
                           int x,
                           int y)

Overrides:

mouseDown in class Component

  public boolean mouseMove(Event e,
                           int x,
                           int y)

Overrides:

mouseMove in class Component