Java 类org.eclipse.gef.requests.LocationRequest 实例源码

@Override
public void showTargetFeedback(Request request) {
    // Do not be fooled, the REQ_SELECTION is poorly named
    // nothing is actually getting selected here, maybe 
    // TimelineTool should change this to reflect something
    // more accurate (inspect?)
    if (request.getType() == REQ_SELECTION
        && request instanceof LocationRequest
    ) {
        LocationRequest loc = (LocationRequest) request;
        Point pt = loc.getLocation().getCopy();
        PlanTimelineDataRowEditPart rowData = getRowData();
        if (rowData != null) {
            pt = pt.translate(-rowData.getFigure().getBounds().x, 0);
            update(pt.x);
        }
    }
}

@Override
public void eraseTargetFeedback(Request request) {
    super.eraseTargetFeedback(request);
    if (request instanceof LocationRequest 
            && tooltipShell != null
            && !tooltipShell.isDisposed()) {
        Timeline activeEditPart = TimelineUtils.getTimeline(this);
        if (activeEditPart != null) {
            EditDomain editDomain = activeEditPart.getEditDomain();
            Tool tool = editDomain.getActiveTool();
            if(tool instanceof TimelineTool) {
                TimelineTool timelineTool = (TimelineTool)tool;
                if(timelineTool != null
                        && timelineTool.getTargetUnderMouse() != null
                        && !timelineTool.getTargetUnderMouse().equals(this.getHost())) {
                    tooltipShell.dispose();
                    tooltipShell = null;
                }
            }
        }
    }
}

/**
 * When asked to show target feedback, figure out where to display the tooltip.
 * Next, get the tooltip (maybe a new one will need to be created), and display
 * it at the calculated location.
 *
 * @param request the request
 */
@Override
public void showTargetFeedback(Request request) {
    if (understandsRequest(request)) {
        if (request instanceof LocationRequest) {
            LocationRequest locationRequest = (LocationRequest)request;
            Point location = locationRequest.getLocation();
            GraphicalEditPart host = (GraphicalEditPart)getHost();
            TOOLTIP_SHELL_MANAGER.display(host, location);
        }
    }
}

/**
 * Creates the hover request (a {@link LocationRequest}) and sets its type
 * to {@link RequestConstants#REQ_SELECTION_HOVER}.
 */
protected void createHoverRequest() {
    hoverRequest = new LocationRequest();
    hoverRequest.setType(RequestConstants.REQ_SELECTION_HOVER);
}

/**
 * Updates the location of the hover request.
 */
protected void updateHoverRequest() {
    LocationRequest request = (LocationRequest) getTargetHoverRequest();
    request.setLocation(getLocation());
}