jcontrol.ui.vole
Class ScrollBar

java.lang.Object
  |
  +--jcontrol.ui.vole.Component
        |
        +--jcontrol.ui.vole.ScrollBar

public class ScrollBar

extends Component

This class ScrollBar implements a graphical scroll bar. The scroll bar can be scrolled manually by e.g. a controllet to realise graphical scrolling. The scroll value range is 0..100.

Author:

Marcus Timmermann, Wolfgang Klingauf

Field Summary

static boolean	HORIZONTAL Horizontal scroll bar.
static boolean	VERTICAL Vertical scroll bar.

Fields inherited from class jcontrol.ui.vole.Component

focusOwner, font, g, height, listener, parent, visible, width, x, y

Constructor Summary

ScrollBar(int x, int y, int size, boolean orientation)
Constructs a new scroll bar.

Method Summary

void	paint() Repaint the ScrollBar.
void	setValue(int value) Sets a new scroll value in percent and repaints the scrollbar.
boolean	transferFocus() We never gain the input focus.

Methods inherited from class jcontrol.ui.vole.Component

getBounds, getParent, isVisible, onActionEvent, onKeyEvent, remove, removeFocus, requestFocus, setBounds, setFont, setGraphics, setLocation, setParent, setVisible, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, notifyAll, wait

Field Detail

HORIZONTAL

public static final boolean HORIZONTAL

Horizontal scroll bar.

See Also:

Constant Field Values

VERTICAL

public static final boolean VERTICAL

Vertical scroll bar.

See Also:

Constant Field Values

Constructor Detail

ScrollBar

public ScrollBar(int x,
                 int y,
                 int size,
                 boolean orientation)

Constructs a new scroll bar.

Parameters:

x - the upper left x coordinate.

y - the upper left y coordinate.

size - the size in pixels (at least 23).

orientation - HORIZONTAL or VERTICAL.

Method Detail

paint

public void paint()

Repaint the ScrollBar.

Overrides:

paint in class Component

setValue

public void setValue(int value)

Sets a new scroll value in percent and repaints the scrollbar.

Parameters:

value - The new scroll value

transferFocus

public boolean transferFocus()

We never gain the input focus.

Overrides:

transferFocus in class Component

Returns:

true, if the focus was transferred successfully.