Eclipse GEF and Draw2d Plug-in Developer Guide (Galileo) - SelectionHandlesEditPolicy (Eclipse GEF API Specification)

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org.eclipse.gef.editpolicies
Class SelectionHandlesEditPolicy

java.lang.Object
  

org.eclipse.gef.editpolicies.AbstractEditPolicy
      

org.eclipse.gef.editpolicies.GraphicalEditPolicy
          

org.eclipse.gef.editpolicies.SelectionEditPolicy
              
org.eclipse.gef.editpolicies.SelectionHandlesEditPolicy

All Implemented Interfaces:: EditPolicy, RequestConstants

Direct Known Subclasses:: BendpointEditPolicy, ConnectionEndpointEditPolicy, NonResizableEditPolicy

public abstract class SelectionHandlesEditPolicy
extends SelectionEditPolicy

A SelectionEditPolicy which manages a List of handles provided by the subclass. Handles are Figures which are added to the HANDLE layer, and generally return a DragTracker for dragging them. Handles are accessible for keyboard use if they return an accessible location.

SelectionHandlesEditPolicy implements IAdaptable for accessibility support. If any of the managed Handles provide accesible locations, then a AccessibleHandleProvider is automatically created.

Since:: 2.0

Field Summary

protected java.util.List handles
          the List of handles

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

SelectionHandlesEditPolicy ()


Method Summary

protected void addSelectionHandles ()
          Adds the handles to the handle layer.

protected abstract java.util.List createSelectionHandles ()
          Subclasses must implement to provide the list of handles.

java.lang.Object getAdapter (java.lang.Class key)


protected void hideSelection ()
          Implemented to remove the handles.

protected void removeSelectionHandles ()
          removes the selection handles from the selection layer.

protected void showSelection ()
          Implemented to add the selection handles

Methods inherited from class org.eclipse.gef.editpolicies. SelectionEditPolicy

activate, addSelectionListener, deactivate, getTargetEditPart, hideFocus, removeSelectionListener, setFocus, setSelectedState, showFocus, showPrimarySelection

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

Field Detail

handles

protected java.util.List handles

the List of handles

Constructor Detail

SelectionHandlesEditPolicy

public SelectionHandlesEditPolicy()

Method Detail

addSelectionHandles

protected void addSelectionHandles()

Adds the handles to the handle layer.

createSelectionHandles

protected abstract java.util.List createSelectionHandles()

Subclasses must implement to provide the list of handles.

Returns:: List of handles; cannot be null

getAdapter

public java.lang.Object getAdapter(java.lang.Class key)

See Also:: org.eclipse.core.runtime.IAdaptable#getAdapter(Class)

hideSelection

protected void hideSelection()

Implemented to remove the handles.

Specified by:: hideSelection in class SelectionEditPolicy

See Also:: SelectionEditPolicy.hideSelection()

removeSelectionHandles

protected void removeSelectionHandles()

removes the selection handles from the selection layer.

showSelection

protected void showSelection()

Implemented to add the selection handles

Specified by:: showSelection in class SelectionEditPolicy

See Also:: SelectionEditPolicy.showSelection()