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Eclipse Draw2d
3.3

org.eclipse.draw2d
Class XYLayout

java.lang.Object
  extended by

org.eclipse.draw2d.AbstractLayout
      extended by
org.eclipse.draw2d.XYLayout
All Implemented Interfaces:
LayoutManager
Direct Known Subclasses:
FreeformLayout

public class XYLayout
extends AbstractLayout

This class implements the LayoutManager interface using the XY Layout algorithm. This lays out the components using the layout constraints as defined by each component.


Field Summary
protected  java.util.Map constraints
          The layout contraints
 
Fields inherited from class org.eclipse.draw2d. AbstractLayout
isObservingVisibility, preferredSize
 
Constructor Summary
XYLayout ()
           
 
Method Summary
protected   Dimension calculatePreferredSize ( IFigure f, int wHint, int hHint)
          Calculates and returns the preferred size of the input figure.
 java.lang.Object getConstraint ( IFigure figure)
          Returns the constraint for the given figure.
  Point getOrigin ( IFigure parent)
          Returns the origin for the given figure.
 void layout ( IFigure parent)
          Implements the algorithm to layout the components of the given container figure.
 void remove ( IFigure figure)
          Removes the given figure from this LayoutManager's list of figures.
 void setConstraint ( IFigure figure, java.lang.Object newConstraint)
          Sets the layout constraint of the given figure.
 
Methods inherited from class org.eclipse.draw2d. AbstractLayout
calculatePreferredSize, getBorderPreferredSize, 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

constraints

protected java.util.Map constraints
The layout contraints

Constructor Detail

XYLayout

public XYLayout()
Method Detail

calculatePreferredSize

protected 
Dimension calculatePreferredSize(
IFigure f,
                                           int wHint,
                                           int hHint)
Calculates and returns the preferred size of the input figure. Since in XYLayout the location of the child should be preserved, the preferred size would be a region which would hold all the children of the input figure. If no constraint is set, that child is ignored for calculation. If width and height are not positive, the preferred dimensions of the child are taken.

Specified by:
calculatePreferredSize in class AbstractLayout
Parameters:
f - The figure
wHint - The width hint
hHint - The height hint
Returns:
The preferred size
Since:
2.0
See Also:
AbstractLayout.calculatePreferredSize(IFigure, int, int)

getConstraint

public java.lang.Object getConstraint(
IFigure figure)
Description copied from class: AbstractLayout
Returns the constraint for the given figure.

Specified by:
getConstraint in interface LayoutManager
Overrides:
getConstraint in class AbstractLayout
Parameters:
figure - The figure
Returns:
The constraint
See Also:
LayoutManager.getConstraint(IFigure)

getOrigin

public 
Point getOrigin(
IFigure parent)
Returns the origin for the given figure.

Parameters:
parent - the figure whose origin is requested
Returns:
the origin

layout

public void layout(
IFigure parent)
Implements the algorithm to layout the components of the given container figure. Each component is laid out using its own layout constraint specifying its size and position.

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

remove

public void remove(
IFigure figure)
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:
figure - The figure to remove
See Also:
LayoutManager.remove(IFigure)

setConstraint

public void setConstraint(
IFigure figure,
                          java.lang.Object newConstraint)
Sets the layout constraint of the given figure. The constraints can only be of type Rectangle.

Specified by:
setConstraint in interface LayoutManager
Overrides:
setConstraint in class AbstractLayout
Parameters:
figure - the child
newConstraint - the child's new constraint
Since:
2.0
See Also:
LayoutManager.setConstraint(IFigure, Object)

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