@Override
protected Command createChangeConstraintCommand(
ChangeBoundsRequest request, EditPart child, Object constraint) {
BControlChangeLayoutCommand cmd = new BControlChangeLayoutCommand();
BControl part = (BControl) child.getModel();
cmd.setModel(child.getModel());
cmd.setConstraint((Rectangle) constraint);
Command result = cmd;
if ((request.getResizeDirection() & PositionConstants.NORTH_SOUTH) != 0) {
Integer guidePos = (Integer) request.getExtendedData().get(SnapToGuides.KEY_HORIZONTAL_GUIDE);
if (guidePos != null) {
result = chainGuideAttachmentCommand(request, part, result, true);
} else if (part.getHorizontalGuide() != null) {
// SnapToGuides didn't provide a horizontal guide, but this part
// is attached
// to a horizontal guide. Now we check to see if the part is
// attached to
// the guide along the edge being resized. If that is the case,
// we need to
// detach the part from the guide; otherwise, we leave it alone.
int alignment = part.getHorizontalGuide().getAlignment(part);
int edgeBeingResized = 0;
if ((request.getResizeDirection() & PositionConstants.NORTH) != 0) edgeBeingResized = -1;
else edgeBeingResized = 1;
if (alignment == edgeBeingResized)
result = result.chain(new ChangeGuideCommand(part, true));
}
}
if ((request.getResizeDirection() & PositionConstants.EAST_WEST) != 0) {
Integer guidePos = (Integer) request.getExtendedData().get(SnapToGuides.KEY_VERTICAL_GUIDE);
if (guidePos != null) {
result = chainGuideAttachmentCommand(request, part, result, false);
} else if (part.getVerticalGuide() != null) {
int alignment = part.getVerticalGuide().getAlignment(part);
int edgeBeingResized = 0;
if ((request.getResizeDirection() & PositionConstants.WEST) != 0) edgeBeingResized = -1;
else edgeBeingResized = 1;
if (alignment == edgeBeingResized)
result = result.chain(new ChangeGuideCommand(part, false));
}
}
if (request.getType().equals(REQ_MOVE_CHILDREN)
|| request.getType().equals(REQ_ALIGN_CHILDREN)) {
result = chainGuideAttachmentCommand(request, part, result, true);
result = chainGuideAttachmentCommand(request, part, result, false);
result = chainGuideDetachmentCommand(request, part, result, true);
result = chainGuideDetachmentCommand(request, part, result, false);
}
return result;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.commands.Command#canExecute()
*/
@Override
public boolean canExecute() {
final Object type = request.getType();
// make sure the Request is of a type we support:
return (RequestConstants.REQ_MOVE.equals(type)
|| RequestConstants.REQ_MOVE_CHILDREN.equals(type)
|| RequestConstants.REQ_RESIZE.equals(type)
|| RequestConstants.REQ_RESIZE_CHILDREN.equals(type));
}
private ChangeBoundsRequest initConstrainedRequest(ChangeBoundsRequest request) {
ChangeBoundsRequest req = new ChangeBoundsRequest();
req.setConstrainedResize(true);
req.setConstrainedMove(true);
req.setType(request.getType());
req.setResizeDirection(request.getResizeDirection());
req.getExtendedData().put(REGION_RESIZE_PROPAGATOR, getHost());
req.getExtendedData()
.put(
SiriusResizeTracker.CHILDREN_MOVE_MODE_KEY,
request.getExtendedData().get(SiriusResizeTracker.CHILDREN_MOVE_MODE_KEY));
req.getExtendedData().put(REGION_RESIZE_INITIAL_REQUEST, request);
return req;
}
// @unused
public static Request getNewSourceFeedbackRequest(Request request, ShapeNodeEditPart editPart) {
if (request instanceof ChangeBoundsRequest) {
ChangeBoundsRequest currRequest = (ChangeBoundsRequest) request;
Dimension oldDelta = currRequest.getSizeDelta();
Dimension newDelta =
getSizeDeltaToFitAnchors(editPart, oldDelta, PreserveAnchorsPositionCommand.PRESERVE_Y);
// Information for creating a new ChangeBoundsRequest has been taken
// from org.eclipse.gef.editpolicies.ResizableEditPolicy
ChangeBoundsRequest newRequest = new ChangeBoundsRequest();
newRequest.setMoveDelta(currRequest.getMoveDelta());
newRequest.setSizeDelta(newDelta);
newRequest.setLocation(currRequest.getLocation());
newRequest.setExtendedData(currRequest.getExtendedData());
newRequest.setResizeDirection(currRequest.getResizeDirection());
newRequest.setType(currRequest.getType());
return newRequest;
} else {
return request;
}
}