Package org.eclipse.gef.editpolicies
Class SelectionEditPolicy
java.lang.Object
org.eclipse.gef.editpolicies.AbstractEditPolicy
org.eclipse.gef.editpolicies.GraphicalEditPolicy
org.eclipse.gef.editpolicies.SelectionEditPolicy
- All Implemented Interfaces:
EditPolicy
,RequestConstants
- Direct Known Subclasses:
ScrollableSelectionFeedbackEditPolicy
,SelectionHandlesEditPolicy
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
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
activate()
Extends activate to hook the appropriate listener and to initialize the visual changes for representing selection/focus.protected void
Adds an EditPartListener to the host to observe selection/focus changes.void
Extends deactivate to unhook the seleciton listener and to remove the visual changes for representing selection/focus.getTargetEditPart
(Request request) Returnsnull
by default.protected void
Override to hide focusprotected abstract void
Override to hide selectionprotected void
Removes the EditPartListener used to observe selectionprotected void
setFocus
(boolean value) Sets the internal focus value.protected void
setSelectedState
(int type) Sets the internal selection value.protected void
Override to show focus.protected void
CallsshowSelection()
by default.protected abstract void
Override to show selectionMethods inherited from class org.eclipse.gef.editpolicies.GraphicalEditPolicy
addFeedback, getFeedbackLayer, getHost, getHostFigure, getLayer, removeFeedback
Methods inherited from class org.eclipse.gef.editpolicies.AbstractEditPolicy
debugFeedback, eraseSourceFeedback, eraseTargetFeedback, getCommand, setHost, showSourceFeedback, showTargetFeedback, toString, understandsRequest
-
Constructor Details
-
SelectionEditPolicy
public SelectionEditPolicy()
-
-
Method Details
-
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 interfaceEditPolicy
- Overrides:
activate
in classAbstractEditPolicy
- See Also:
-
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 interfaceEditPolicy
- Overrides:
deactivate
in classAbstractEditPolicy
- See Also:
-
getTargetEditPart
Description copied from class:AbstractEditPolicy
Returnsnull
by default.null
indicates that this policy is unable to determine the target for the specifiedRequest
.- Specified by:
getTargetEditPart
in interfaceEditPolicy
- Overrides:
getTargetEditPart
in classAbstractEditPolicy
- Parameters:
request
- the Request- Returns:
null
or the appropriate targetEditPart
- See Also:
-
hideFocus
protected void hideFocus()Override to hide focus- See Also:
-
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, eithershowFocus()
orhideFocus()
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:
-
showPrimarySelection
protected void showPrimarySelection()CallsshowSelection()
by default. Override to distinguish between primary and normal selection. -
showSelection
protected abstract void showSelection()Override to show selection
-