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Eclipse GEF
3.3

org.eclipse.gef.editpolicies
Class FlowLayoutEditPolicy

java.lang.Object
  extended by

org.eclipse.gef.editpolicies.AbstractEditPolicy
      extended by

org.eclipse.gef.editpolicies.GraphicalEditPolicy
          extended by

org.eclipse.gef.editpolicies.LayoutEditPolicy
              extended by

org.eclipse.gef.editpolicies.OrderedLayoutEditPolicy
                  extended by
org.eclipse.gef.editpolicies.FlowLayoutEditPolicy
All Implemented Interfaces:
EditPolicy, RequestConstants

public abstract class FlowLayoutEditPolicy
extends OrderedLayoutEditPolicy

An EditPolicy for use with FlowLayout. This EditPolicy knows how to map an coordinate on the layout container to the appropriate index for the operation being performed. It also shows target feedback consisting of an insertion line at the appropriate location.

Since:
2.0

Field Summary
 
Fields inherited from interface org.eclipse.gef. EditPolicy
COMPONENT_ROLE, CONNECTION_BENDPOINTS_ROLE, CONNECTION_ENDPOINTS_ROLE, CONNECTION_ROLE, CONTAINER_ROLE, DIRECT_EDIT_ROLE, GRAPHICAL_NODE_ROLE, LAYOUT_ROLE, NODE_ROLE, PRIMARY_DRAG_ROLE, SELECTION_FEEDBACK_ROLE, TREE_CONTAINER_ROLE
 
Fields inherited from interface org.eclipse.gef. RequestConstants
REQ_ADD, REQ_ALIGN, REQ_ALIGN_CHILDREN, REQ_CLONE, REQ_CONNECTION_END, REQ_CONNECTION_START, REQ_CREATE, REQ_CREATE_BENDPOINT, REQ_DELETE, REQ_DELETE_DEPENDANT, REQ_DIRECT_EDIT, REQ_MOVE, REQ_MOVE_BENDPOINT, REQ_MOVE_CHILDREN, REQ_OPEN, REQ_ORPHAN, REQ_ORPHAN_CHILDREN, REQ_RECONNECT_SOURCE, REQ_RECONNECT_TARGET, REQ_RESIZE, REQ_RESIZE_CHILDREN, REQ_SELECTION, REQ_SELECTION_HOVER
 
Constructor Summary
FlowLayoutEditPolicy ()
           
 
Method Summary
protected  void eraseLayoutTargetFeedback ( Request request)
          Erases target layout feedback.
protected  int getFeedbackIndexFor ( Request request)
           
protected   EditPart getInsertionReference ( Request request)
          Calculates a reference EditPart using the specified Request.
protected   Polyline getLineFeedback ()
          Lazily creates and returns a Polyline Figure for use as feedback.
protected  boolean isHorizontal ()
           
protected  void showLayoutTargetFeedback ( Request request)
          Shows an insertion line if there is one or more current children.
 
Methods inherited from class org.eclipse.gef.editpolicies. OrderedLayoutEditPolicy
createAddCommand, createChildEditPolicy, createMoveChildCommand, getAddCommand, getMoveChildrenCommand
 
Methods inherited from class org.eclipse.gef.editpolicies. LayoutEditPolicy
activate, createListener, createSizeOnDropFeedback, deactivate, decorateChild, decorateChildren, eraseSizeOnDropFeedback, eraseTargetFeedback, getCloneCommand, getCommand, getCreateCommand, getCreationFeedbackOffset, getDeleteDependantCommand, getLayoutContainer, getOrphanChildrenCommand, getSizeOnDropFeedback, getSizeOnDropFeedback, getTargetEditPart, setListener, showSizeOnDropFeedback, showTargetFeedback, undecorateChild, undecorateChildren
 
Methods inherited from class org.eclipse.gef.editpolicies. GraphicalEditPolicy
addFeedback, getFeedbackLayer, getHostFigure, getLayer, removeFeedback
 
Methods inherited from class org.eclipse.gef.editpolicies. AbstractEditPolicy
debugFeedback, eraseSourceFeedback, getHost, setHost, showSourceFeedback, toString, understandsRequest
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

FlowLayoutEditPolicy

public FlowLayoutEditPolicy()
Method Detail

eraseLayoutTargetFeedback

protected void eraseLayoutTargetFeedback(
Request request)
Description copied from class: LayoutEditPolicy
Erases target layout feedback. This method is the inverse of LayoutEditPolicy.showLayoutTargetFeedback(Request).

Overrides:
eraseLayoutTargetFeedback in class LayoutEditPolicy
Parameters:
request - the Request
See Also:
LayoutEditPolicy.eraseLayoutTargetFeedback(Request)

getFeedbackIndexFor

protected int getFeedbackIndexFor(
Request request)
Parameters:
request - the Request
Returns:
the index for the insertion reference

getInsertionReference

protected 
EditPart getInsertionReference(
Request request)
Description copied from class: OrderedLayoutEditPolicy
Calculates a reference EditPart using the specified Request. The EditPart returned is used to mark the index coming after that EditPart. null is used to indicate the index that comes after no EditPart, that is, it indicates the very last index.

Specified by:
getInsertionReference in class OrderedLayoutEditPolicy
Parameters:
request - the Request
Returns:
null or a reference EditPart
See Also:
OrderedLayoutEditPolicy.getInsertionReference(Request)

getLineFeedback

protected 
Polyline getLineFeedback()
Lazily creates and returns a Polyline Figure for use as feedback.

Returns:
a Polyline figure

isHorizontal

protected boolean isHorizontal()
Returns:
true if the host's LayoutManager is in a horizontal orientation

showLayoutTargetFeedback

protected void showLayoutTargetFeedback(
Request request)
Shows an insertion line if there is one or more current children.

Overrides:
showLayoutTargetFeedback in class LayoutEditPolicy
Parameters:
request - the Request
See Also:
LayoutEditPolicy.showLayoutTargetFeedback(Request)

Eclipse GEF
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