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Eclipse Draw2d
3.3

org.eclipse.draw2d
Class ScrollBarLayout

java.lang.Object
  extended by

org.eclipse.draw2d.AbstractLayout
      extended by
org.eclipse.draw2d.ScrollBarLayout
All Implemented Interfaces:
LayoutManager

public class ScrollBarLayout
extends AbstractLayout

Lays out the Figures that make up a ScrollBar.


Field Summary
static java.lang.String DOWN_ARROW
          Used as a constraint for the down arrow figure.
static java.lang.String PAGE_DOWN
          Used as a constraint for the page down figure.
static java.lang.String PAGE_UP
          Used as a constraint for the page up figure.
static java.lang.String THUMB
          Used as a constraint for the thumb figure.
protected   Transposer transposer
          Transposes values if the ScrollBar is horizontally oriented.
static java.lang.String UP_ARROW
          Used as a constraint for the up arrow figure.
 
Fields inherited from class org.eclipse.draw2d. AbstractLayout
isObservingVisibility, preferredSize
 
Constructor Summary
ScrollBarLayout ( Transposer t)
          Constructs a ScrollBarLayout.
 
Method Summary
protected   Dimension calculatePreferredSize ( IFigure parent, int w, int h)
          Calculates the preferred size of the given figure, using width and height hints.
 void layout ( IFigure parent)
          Lays out the given figure.
protected   Rectangle layoutButtons ( ScrollBar scrollBar)
          Places the buttons and returns the Rectangle into which the track should be placed.
 void remove ( IFigure child)
          Removes the given figure from this LayoutManager's list of figures.
 void setConstraint ( IFigure figure, java.lang.Object constraint)
          Sets the constraint for the given figure.
 
Methods inherited from class org.eclipse.draw2d. AbstractLayout
calculatePreferredSize, getBorderPreferredSize, getConstraint, getMinimumSize, getMinimumSize, getPreferredSize, getPreferredSize, invalidate, invalidate, isObservingVisibility, setObserveVisibility
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

UP_ARROW

public static final java.lang.String UP_ARROW
Used as a constraint for the up arrow figure.

See Also:
Constant Field Values

DOWN_ARROW

public static final java.lang.String DOWN_ARROW
Used as a constraint for the down arrow figure.

See Also:
Constant Field Values

THUMB

public static final java.lang.String THUMB
Used as a constraint for the thumb figure.

See Also:
Constant Field Values

PAGE_UP

public static final java.lang.String PAGE_UP
Used as a constraint for the page up figure.

See Also:
Constant Field Values

PAGE_DOWN

public static final java.lang.String PAGE_DOWN
Used as a constraint for the page down figure.

See Also:
Constant Field Values

transposer

protected final 
Transposer transposer
Transposes values if the ScrollBar is horizontally oriented. When used properly, the layout manager just needs to code for one case: vertical orientation.

Constructor Detail

ScrollBarLayout

public ScrollBarLayout(
Transposer t)
Constructs a ScrollBarLayout. If the given Transposer is enabled, the Scrollbar will be horizontally oriented. Otherwise, the ScrollBar will be vertically oriented.

Parameters:
t - the Transposer
Since:
2.0
Method Detail

setConstraint

public void setConstraint(
IFigure figure,
                          java.lang.Object constraint)
Description copied from class: AbstractLayout
Sets the constraint for the given figure.

Specified by:
setConstraint in interface LayoutManager
Overrides:
setConstraint in class AbstractLayout
Parameters:
figure - the child
constraint - the child's new constraint
See Also:
AbstractLayout.setConstraint(IFigure, Object)

calculatePreferredSize

protected 
Dimension calculatePreferredSize(
IFigure parent,
                                           int w,
                                           int h)
Description copied from class: AbstractLayout
Calculates the preferred size of the given figure, using width and height hints.

Specified by:
calculatePreferredSize in class AbstractLayout
Parameters:
parent - The figure
w - The width hint
h - The height hint
Returns:
The preferred size
See Also:
AbstractLayout.calculatePreferredSize(IFigure, int, int)

layout

public void layout(
IFigure parent)
Description copied from interface: LayoutManager
Lays out the given figure.

Parameters:
parent - The figure
See Also:
LayoutManager.layout(IFigure)

layoutButtons

protected 
Rectangle layoutButtons(
ScrollBar scrollBar)
Places the buttons and returns the Rectangle into which the track should be placed. The track consists of the pageup, pagedown, and thumb figures. The Rectangle returned should be transposed correctly, that is, it should be vertically oriented. Users of the rectangle will re-transpose it for horizontal use.

Parameters:
scrollBar - the scrollbar whose buttons are being layed out
Returns:
the Rectangle into which the track should be placed
Since:
2.0

remove

public void remove(
IFigure child)
Description copied from class: AbstractLayout
Removes the given figure from this LayoutManager's list of figures.

Specified by:
remove in interface LayoutManager
Overrides:
remove in class AbstractLayout
Parameters:
child - The figure to remove
See Also:
LayoutManager.remove(IFigure)

Eclipse Draw2d
3.3

Copyright (c) IBM Corp. and others 2000, 2007. All Rights Reserved.

 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire