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org.eclipse.draw2d
Class ScrollBarLayout

java.lang.Object
  

org.eclipse.draw2d.AbstractLayout
      
org.eclipse.draw2d.ScrollBarLayout

All Implemented Interfaces:

LayoutManager

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public class ScrollBarLayout

extends AbstractLayout

Lays out the Figures that make up a ScrollBar.

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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

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DOWN_ARROW

public static final java.lang.String DOWN_ARROW

Used as a constraint for the down arrow figure.

See Also:

Constant Field Values

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THUMB

public static final java.lang.String THUMB

Used as a constraint for the thumb figure.

See Also:

Constant Field Values

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PAGE_UP

public static final java.lang.String PAGE_UP

Used as a constraint for the page up figure.

See Also:

Constant Field Values

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PAGE_DOWN

public static final java.lang.String PAGE_DOWN

Used as a constraint for the page down figure.

See Also:

Constant Field Values

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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)

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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)

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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)

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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

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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)

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