brf.j2me.dynaworks.ui
Class Slider

java.lang.Object
  |
  +--brf.j2me.dynaworks.ui.BasicWidget
        |
        +--brf.j2me.dynaworks.ui.Slider

All Implemented Interfaces:

UserWidget

public class Slider

extends BasicWidget

Custom user control widget for a slider.

Implements a horizontally oriented slider control.

Version:

1.0

Author:

Bernd R. Fix

See Also:

BasicWidget, UserWidget

Field Summary

private int	max range values (maximum).
private int	min range values (minimum).
private int	pos position of the slider.
private int	r current visible range.
private int	xr x-coordinate of upper-right corner.
private int	yb y-coordinate of lower-left corner.

Fields inherited from class brf.j2me.dynaworks.ui.BasicWidget

g, h, w, x, y

Constructor Summary

Slider(int x, int y, int w, int h)
constructor.

Method Summary

int	getPosition() get the current position.
ActionEvent	handlePenDown(int xc, int yc) Handle a "pen down" event.
ActionEvent	handlePenMove(int xc, int yc) Handle a "pen move" event.
void	paint() Paint the user control.
int	setPosition(int pos) set the position of the slider.
void	setRange(int min, int max, int pos) set the range for the slider.
void	update(int lastPos) update the slider representation.

Methods inherited from class brf.j2me.dynaworks.ui.BasicWidget

, contains, handleKeyDown, handlePenUp, handleSysKeyDown, hasFocus, loseFocus, setFocus

Methods inherited from class java.lang.Object

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

Field Detail

min

private int min

range values (minimum).

max

private int max

range values (maximum).

r

private int r

current visible range.

pos

private int pos

position of the slider.

xr

private int xr

x-coordinate of upper-right corner.

yb

private int yb

y-coordinate of lower-left corner.

Constructor Detail

Slider

public Slider(int x,
              int y,
              int w,
              int h)

constructor.

Parameters:

x - int - x coordinate of upper-left corner.

y - int - y coordinate of upper-left corner.

w - int - width of the control.

h - int - height of the control.

Method Detail

setRange

public void setRange(int min,
                     int max,
                     int pos)

set the range for the slider.

Parameters:

min - int - minimum value for slider.

max - int - maximum value for slider.

pos - int - start position for marker.

setPosition

public int setPosition(int pos)

set the position of the slider.

Parameters:

pos - int - new position of slider.

Returns:

int - old position of slider.

getPosition

public int getPosition()

get the current position.

Returns:

int - current position of slider.

handlePenDown

public ActionEvent handlePenDown(int xc,
                                 int yc)

Handle a "pen down" event. Return an ActionEvent if neccessary.

Overrides:

handlePenDown in class BasicWidget

Parameters:

xc - int - x coordinate of hit point.

yc - int - y coordinate of hit point.

Returns:

ActionEvent - event triggered by PenDown (or null).

See Also:

ActionEvent

handlePenMove

public ActionEvent handlePenMove(int xc,
                                 int yc)

Handle a "pen move" event. Return an ActionEvent if neccessary.

Overrides:

handlePenMove in class BasicWidget

Parameters:

xc - int - x coordinate of pen point.

yc - int - y coordinate of pen point.

Returns:

ActionEvent - event triggered by PenMove (or null).

See Also:

ActionEvent

paint

public void paint()

Paint the user control.

Overrides:

paint in class BasicWidget

update

public void update(int lastPos)

update the slider representation.

Just repaint the changed parts of the control.

Parameters:

lastPos - int - fast repaint based on last position.