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Eclipse GEF
3.3

org.eclipse.gef.editpolicies
Class SelectionEditPolicy

java.lang.Object
  extended by

org.eclipse.gef.editpolicies.AbstractEditPolicy
      extended by

org.eclipse.gef.editpolicies.GraphicalEditPolicy
          extended by
org.eclipse.gef.editpolicies.SelectionEditPolicy
All Implemented Interfaces:
EditPolicy, RequestConstants
Direct Known Subclasses:
SelectionHandlesEditPolicy

public abstract class SelectionEditPolicy
extends GraphicalEditPolicy

A GraphicalEditPolicy that is sensitive to the host's selection. The overall selection of the host EditPart includes whether or not it has focus. Subclasses will typically decorate the GraphicalEditPart with things like selection handles and/or focus feedback.

This EditPolicy adds itself as an EditPartListener so that it can observe selection. When selection or focus changes, the EditPolicy will update itself and call the appropriate methods.

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
SelectionEditPolicy ()
           
 
Method Summary
 void activate ()
          Extends activate to hook the appropriate listener and to initialize the visual changes for representing selection/focus.
protected  void addSelectionListener ()
          Adds an EditPartListener to the host to observe selection/focus changes.
 void deactivate ()
          Extends deactivate to unhook the seleciton listener and to remove the visual changes for representing selection/focus.
  EditPart getTargetEditPart ( Request request)
          Returns null by default.
protected  void hideFocus ()
          Override to hide focus
protected abstract  void hideSelection ()
          Override to hide selection
protected  void removeSelectionListener ()
          Removes the EditPartListener used to observe selection
protected  void setFocus (boolean value)
          Sets the internal focus value.
protected  void setSelectedState (int type)
          Sets the internal selection value.
protected  void showFocus ()
          Override to show focus.
protected  void showPrimarySelection ()
          Calls showSelection() by default.
protected abstract  void showSelection ()
          Override to show selection
 
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, eraseTargetFeedback, getCommand, getHost, setHost, showSourceFeedback, showTargetFeedback, toString, understandsRequest
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

SelectionEditPolicy

public SelectionEditPolicy()
Method Detail

activate

public void activate()
Extends activate to hook the appropriate listener and to initialize the visual changes for representing selection/focus.

Specified by:
activate in interface EditPolicy
Overrides:
activate in class AbstractEditPolicy
See Also:
EditPolicy.activate()

addSelectionListener

protected void addSelectionListener()
Adds an EditPartListener to the host to observe selection/focus changes.


deactivate

public void deactivate()
Extends deactivate to unhook the seleciton listener and to remove the visual changes for representing selection/focus.

Specified by:
deactivate in interface EditPolicy
Overrides:
deactivate in class AbstractEditPolicy
See Also:
EditPolicy.deactivate()

getTargetEditPart

public 
EditPart getTargetEditPart(
Request request)
Description copied from class: AbstractEditPolicy
Returns null by default. null indicates that this policy is unable to determine the target for the specified Request.

Specified by:
getTargetEditPart in interface EditPolicy
Overrides:
getTargetEditPart in class AbstractEditPolicy
See Also:
EditPolicy.getTargetEditPart(Request)

hideFocus

protected void hideFocus()
Override to hide focus

See Also:
showFocus()

hideSelection

protected abstract void hideSelection()
Override to hide selection


removeSelectionListener

protected void removeSelectionListener()
Removes the EditPartListener used to observe selection


setFocus

protected void setFocus(boolean value)
Sets the internal focus value. This method is called automatically by the listener. If the focus value is changed, either showFocus() or hideFocus() will be called.

Parameters:
value - true if the EditPolicy should show focus

setSelectedState

protected void setSelectedState(int type)
Sets the internal selection value. This method is called automatically by the listener. If the selection value is changed, the appropriate method is called to show the specified selection type.

Parameters:
type - the type of selection the EditPolicy should display

showFocus

protected void showFocus()
Override to show focus.

See Also:
hideFocus()

showPrimarySelection

protected void showPrimarySelection()
Calls showSelection() by default. Override to distinguish between primary and normal selection.


showSelection

protected abstract void showSelection()
Override to show selection


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