protected Command createChangeConstraintCommand(
ChangeBoundsRequest request, EditPart child, Object constraint) {
SetConstraintCommand cmd = new SetConstraintCommand();
LogicSubpart part = (LogicSubpart) child.getModel();
cmd.setPart(part);
cmd.setLocation((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;
}
protected Command createAddCommand(
ChangeBoundsRequest request, EditPart child, Object constraint) {
LogicSubpart part = (LogicSubpart) child.getModel();
Rectangle rect = (Rectangle) constraint;
AddCommand add = new AddCommand();
add.setParent((LogicDiagram) getHost().getModel());
add.setChild(part);
add.setLabel(LogicMessages.LogicXYLayoutEditPolicy_AddCommandLabelText);
add.setDebugLabel("LogicXYEP add subpart"); // $NON-NLS-1$
SetConstraintCommand setConstraint = new SetConstraintCommand();
setConstraint.setLocation(rect);
setConstraint.setPart(part);
setConstraint.setLabel(LogicMessages.LogicXYLayoutEditPolicy_AddCommandLabelText);
setConstraint.setDebugLabel("LogicXYEP setConstraint"); // $NON-NLS-1$
Command cmd = add.chain(setConstraint);
cmd = chainGuideAttachmentCommand(request, part, cmd, true);
cmd = chainGuideAttachmentCommand(request, part, cmd, false);
cmd = chainGuideDetachmentCommand(request, part, cmd, true);
return chainGuideDetachmentCommand(request, part, cmd, false);
}