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org.eclipse.gef.editpolicies
Class BendpointEditPolicy
java.lang.Object
org.eclipse.gef.editpolicies.AbstractEditPolicy
org.eclipse.gef.editpolicies.GraphicalEditPolicy
org.eclipse.gef.editpolicies.SelectionEditPolicy
org.eclipse.gef.editpolicies.SelectionHandlesEditPolicy
org.eclipse.gef.editpolicies.BendpointEditPolicy
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All Implemented Interfaces:
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EditPolicy, java.util.EventListener, java.beans.PropertyChangeListener,
RequestConstants
- public abstract class BendpointEditPolicy
- extends
SelectionHandlesEditPolicy
- implements java.beans.PropertyChangeListener
Used to add bendpoint handles on a
ConnectionEditPart .
BendpointEditPolicy will automatically observe the
Connection figure. If the number of bends in the
Connection changes, the handles will be updated.
Fields inherited from interface org.eclipse.gef.
EditPolicy
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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
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Fields inherited from interface org.eclipse.gef.
RequestConstants
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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
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Methods inherited from class java.lang.Object
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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BendpointEditPolicy
public BendpointEditPolicy()
activate
public void activate()
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activate() is extended to add a listener to the Connection
figure.
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Specified by:
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activate
in interface
EditPolicy
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Overrides:
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activate
in class
SelectionEditPolicy
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See Also:
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EditPolicy.activate()
createSelectionHandles
protected java.util.List createSelectionHandles()
- Creates selection handles for the bendpoints. Explicit (user-defined) bendpoints will
have
BendpointMoveHandle s on them with a single
BendpointCreationHandle between 2 consecutive explicit bendpoints. If implicit
bendpoints (such as those created by the
AutomaticRouter ) are used, one
BendpointCreationHandle is placed in the middle of the Connection.
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Specified by:
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createSelectionHandles
in class
SelectionHandlesEditPolicy
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Returns:
- List of handles; cannot be
null
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See Also:
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SelectionHandlesEditPolicy.createSelectionHandles()
deactivate
public void deactivate()
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deactivate() is extended to remove the property change listener on the
Connection figure.
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Specified by:
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deactivate
in interface
EditPolicy
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Overrides:
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deactivate
in class
SelectionEditPolicy
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See Also:
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EditPolicy.deactivate()
eraseConnectionFeedback
protected void eraseConnectionFeedback(
BendpointRequest request)
- Erases all bendpoint feedback. Since the original
Connection figure is
used for feedback, we just restore the original constraint that was saved before
feedback started to show.
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Parameters:
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request - the BendpointRequest
eraseSourceFeedback
public void eraseSourceFeedback(
Request request)
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Description copied from class:
AbstractEditPolicy
- Does nothing by default.
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Specified by:
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eraseSourceFeedback
in interface
EditPolicy
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Overrides:
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eraseSourceFeedback
in class
AbstractEditPolicy
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See Also:
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EditPolicy.eraseSourceFeedback(Request)
getCommand
public
Command getCommand(
Request request)
- Factors the Request into either a MOVE, a DELETE, or a CREATE of a bendpoint.
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Specified by:
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getCommand
in interface
EditPolicy
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Overrides:
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getCommand
in class
AbstractEditPolicy
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See Also:
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EditPolicy.getCommand(Request)
getConnection
protected
Connection getConnection()
- Convenience method for obtaining the host's
Connection figure.
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Returns:
- the Connection figure
getCreateBendpointCommand
protected abstract
Command getCreateBendpointCommand(
BendpointRequest request)
- Implement this method to return a Command that will create a bendpoint.
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Parameters:
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request - the BendpointRequest
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Returns:
- a Command to create a bendpoint
getDeleteBendpointCommand
protected abstract
Command getDeleteBendpointCommand(
BendpointRequest request)
- Implement this method to return a Command that will delete a bendpoint.
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Parameters:
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request - the BendpointRequest
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Returns:
- a Command to delete a bendpoint
getMoveBendpointCommand
protected abstract
Command getMoveBendpointCommand(
BendpointRequest request)
- Implement this method to return a Command that will move a bendpoint.
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Parameters:
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request - the BendpointRequest
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Returns:
- a Command to move a bendpoint
propertyChange
public void propertyChange(java.beans.PropertyChangeEvent evt)
- If the number of bendpoints changes, handles are updated.
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Specified by:
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propertyChange in interface java.beans.PropertyChangeListener
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See Also:
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PropertyChangeListener.propertyChange(PropertyChangeEvent)
restoreOriginalConstraint
protected void restoreOriginalConstraint()
- Restores the original constraint that was saved before feedback began to show.
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saveOriginalConstraint
protected void saveOriginalConstraint()
- Since the original figure is used for feedback, this method saves the
original constraint, so that is can be restored when the feedback is
erased.
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showCreateBendpointFeedback
protected void showCreateBendpointFeedback(
BendpointRequest request)
- Shows feedback when a bendpoint is being created. The original figure is used for
feedback and the original constraint is saved, so that it can be restored when feedback
is erased.
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Parameters:
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request - the BendpointRequest
showDeleteBendpointFeedback
protected void showDeleteBendpointFeedback(
BendpointRequest request)
- Shows feedback when a bendpoint is being deleted. This method is only called once when
the bendpoint is first deleted, not every mouse move. The original figure is used for
feedback and the original constraint is saved, so that it can be restored when
feedback is erased.
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Parameters:
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request - the BendpointRequest
showMoveBendpointFeedback
protected void showMoveBendpointFeedback(
BendpointRequest request)
- Shows feedback when a bendpoint is being moved. Also checks to see if the bendpoint
should be deleted and then calls
showDeleteBendpointFeedback(BendpointRequest)
if needed. The original figure is used for feedback and the original constraint is
saved, so that it can be restored when feedback is erased.
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Parameters:
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request - the BendpointRequest
showSourceFeedback
public void showSourceFeedback(
Request request)
- Shows feedback when appropriate. Calls a different method depending on the request
type.
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Specified by:
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showSourceFeedback
in interface
EditPolicy
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Overrides:
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showSourceFeedback
in class
AbstractEditPolicy
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Parameters:
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request - the Request -
See Also:
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showCreateBendpointFeedback(BendpointRequest) ,
showMoveBendpointFeedback(BendpointRequest)
Copyright (c) IBM Corp. and others 2000, 2007. All Rights Reserved.
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