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org.eclipse.gef.editpolicies
Class NonResizableEditPolicy
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.NonResizableEditPolicy
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All Implemented Interfaces:
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EditPolicy,
RequestConstants
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Direct Known Subclasses:
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ResizableEditPolicy
- public class NonResizableEditPolicy
- extends
SelectionHandlesEditPolicy
Provide support for selecting and positioning a non-resizable editpart. Selection is
indicated via four square handles at each corner of the editpart's figure, and a
rectangular handle that outlines the editpart with a 1-pixel black line. All of these
handles return
DragEditPartsTracker s, which allows the
current selection to be dragged.
During feedback, a rectangle filled using XOR and outlined with dashes is drawn.
Subclasses can tailor the feedback.
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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NonResizableEditPolicy
public NonResizableEditPolicy()
createDragSourceFeedbackFigure
protected
IFigure createDragSourceFeedbackFigure()
- Creates the figure used for feedback.
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Returns:
- the new feedback figure
createSelectionHandles
protected java.util.List createSelectionHandles()
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Description copied from class:
SelectionHandlesEditPolicy
- Subclasses must implement to provide the list of handles.
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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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Description copied from class:
SelectionEditPolicy
- Extends deactivate to unhook the seleciton listener and to remove the visual
changes for representing selection/focus.
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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()
eraseChangeBoundsFeedback
protected void eraseChangeBoundsFeedback(
ChangeBoundsRequest request)
- Erases drag feedback. This method called whenever an erase feedback request is
received of the appropriate type.
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Parameters:
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request - the request
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(org.eclipse.gef.Request)
getCommand
public
Command getCommand(
Request request)
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Description copied from class:
AbstractEditPolicy
- Returns
null by default. null is used to indicate that the
EditPolicy does not contribute to the specified Request .
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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(org.eclipse.gef.Request)
getDragSourceFeedbackFigure
protected
IFigure getDragSourceFeedbackFigure()
- Lazily creates and returns the feedback figure used during drags.
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Returns:
- the feedback figure
getAlignCommand
protected
Command getAlignCommand(
AlignmentRequest request)
- Returns the command contribution to an alignment request
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Parameters:
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request - the alignment request
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Returns:
- the contribution to the alignment
getInitialFeedbackBounds
protected
Rectangle getInitialFeedbackBounds()
- Returns the bounds of the host's figure by reference to be used to calculate the
initial location of the feedback. The returned Rectangle should not be modified. Uses
handle bounds if available.
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Returns:
- the host figure's bounding Rectangle
getMoveCommand
protected
Command getMoveCommand(
ChangeBoundsRequest request)
- Returns the command contribution to a change bounds request. The implementation
actually redispatches the request to the host's parent editpart as a
RequestConstants.REQ_MOVE_CHILDREN request. The parent's contribution is returned.
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Parameters:
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request - the change bounds request
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Returns:
- the command contribution to the request
getOrphanCommand
protected
Command getOrphanCommand(
Request req)
- Subclasses may override to contribute to the orphan request. By default,
null is returned to indicate no participation. Orphan requests are not
forwarded to the host's parent here. That is done in
ComponentEditPolicy . So,
if the host has a component editpolicy, then the parent will already have a chance to
contribute.
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Parameters:
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req - the orphan request
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Returns:
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null by default
hideFocus
protected void hideFocus()
- Hides the focus rectangle displayed in
showFocus() .
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Overrides:
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hideFocus
in class
SelectionEditPolicy
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See Also:
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showFocus() ,
SelectionEditPolicy.hideFocus()
isDragAllowed
public boolean isDragAllowed()
- Returns true if this EditPolicy allows its EditPart to be dragged.
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Returns:
- true if the EditPart can be dragged.
setDragAllowed
public void setDragAllowed(boolean isDragAllowed)
- Sets the dragability of the EditPolicy to the given value. If the value is
false, the EditPolicy should not allow its EditPart to be dragged.
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Parameters:
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isDragAllowed - whether or not the EditPolicy can be dragged.
showChangeBoundsFeedback
protected void showChangeBoundsFeedback(
ChangeBoundsRequest request)
- Shows or updates feedback for a change bounds request.
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Parameters:
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request - the request
showFocus
protected void showFocus()
- Shows a focus rectangle around the host's figure. The focus rectangle is expanded by 5
pixels from the figure's bounds.
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Overrides:
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showFocus
in class
SelectionEditPolicy
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See Also:
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SelectionEditPolicy.showFocus()
showSourceFeedback
public void showSourceFeedback(
Request request)
- Calls other methods as appropriate.
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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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See Also:
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EditPolicy.showSourceFeedback(org.eclipse.gef.Request)
understandsRequest
public boolean understandsRequest(
Request request)
- Returns
true for move, align, add, and orphan request types. This method
is never called for some of these types, but they are included for possible future use.
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Specified by:
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understandsRequest
in interface
EditPolicy
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Overrides:
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understandsRequest
in class
AbstractEditPolicy
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See Also:
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EditPolicy.understandsRequest(org.eclipse.gef.Request)
Copyright (c) IBM Corp. and others 2000, 2007. All Rights Reserved.
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