/**
* Copyright (c) 2009 Borland Software Corp.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Alexander Shatalin (Borland) - initial API and implementation
*/
package org.eclipse.gmf.graphdef.editor.edit.policies;
import java.util.Collections;
import java.util.List;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.RoundedRectangle;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.emf.workspace.util.WorkspaceSynchronizer;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.UnexecutableCommand;
import org.eclipse.gef.editpolicies.ConstrainedLayoutEditPolicy;
import org.eclipse.gef.requests.ChangeBoundsRequest;
import org.eclipse.gef.requests.CreateRequest;
import org.eclipse.gef.requests.DropRequest;
import org.eclipse.gef.requests.GroupRequest;
import org.eclipse.gmf.gmfgraph.RealFigure;
import org.eclipse.gmf.graphdef.editor.edit.parts.AbstractFigureEditPart;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy;
import org.eclipse.gmf.runtime.diagram.ui.requests.RequestConstants;
import org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
public class GridLayoutEditPolicy extends ConstrainedLayoutEditPolicy {
private static final Color FEEDBACK_COLOR = ColorConstants.lightBlue;
private static final Color GRID_COLOR = ColorConstants.lightGreen;
private static final Color INNER_FIGURES_COLOR = ColorConstants.red;
private RoundedRectangle myFeedbackFigure;
private GridLayoutHelper myFeedbackBoundsHelper;
private GridFigure myGridFigure;
@Override
protected void showLayoutTargetFeedback(Request request) {
if (/* RequestConstants.REQ_CREATE.equals(request.getType()) || */RequestConstants.REQ_MOVE.equals(request.getType())) {
// [1]
DropRequest dropRequest = (DropRequest) request;
IFigure figure = getLayoutContainer();
Point where = dropRequest.getLocation().getCopy();
figure.translateToRelative(where);
figure.translateFromParent(where);
where.translate(getLayoutOrigin().getNegated());
if (myFeedbackBoundsHelper == null) {
myFeedbackBoundsHelper = new GridLayoutHelper(getAbstractFigureEditPart());
}
if (myGridFigure == null) {
myGridFigure = new GridFigure(myFeedbackBoundsHelper.getGrid(), myFeedbackBoundsHelper.getHeights(), myFeedbackBoundsHelper.getWidths(), myFeedbackBoundsHelper.getGridLayout());
Rectangle bounds = figure.getBounds().getCopy();
figure.translateToAbsolute(bounds);
getFeedbackLayer().translateToRelative(bounds);
myGridFigure.setBounds(bounds);
myGridFigure.setForegroundColor(GRID_COLOR);
myGridFigure.setInnerFigureBoundsColor(INNER_FIGURES_COLOR);
myGridFigure.setLineWidth(2);
getFeedbackLayer().add(myGridFigure);
}
IFigure childFigure = null;
if (dropRequest instanceof GroupRequest) {
List editParts = ((GroupRequest) dropRequest).getEditParts();
assert editParts.size() == 1;
childFigure = ((AbstractFigureEditPart) editParts.get(0)).getFigure();
}
Rectangle feedbackBounds = myFeedbackBoundsHelper.getFeedbackBounds(where, childFigure);
if (feedbackBounds == null) {
eraseTargetFeedback(request);
return;
}
figure.translateToParent(feedbackBounds);
figure.translateToAbsolute(feedbackBounds);
getFeedbackLayer().translateToRelative(feedbackBounds);
if (myFeedbackFigure == null) {
myFeedbackFigure = new RoundedRectangle();
myFeedbackFigure.setFill(false);
myFeedbackFigure.setOutline(true);
myFeedbackFigure.setForegroundColor(FEEDBACK_COLOR);
myFeedbackFigure.setLineWidth(1);
myFeedbackFigure.setAntialias(SWT.ON);
myFeedbackFigure.setBounds(feedbackBounds);
getFeedbackLayer().add(myFeedbackFigure);
} else {
myFeedbackFigure.setBounds(feedbackBounds);
}
//[2]
// ChangeBoundsRequest changeBoundsRequest = (ChangeBoundsRequest) request;
// IFigure figure = getLayoutContainer();
// Point where = changeBoundsRequest.getLocation().getCopy();
// figure.translateToRelative(where);
// figure.translateFromParent(where);
// where.translate(getLayoutOrigin().getNegated());
//
// if (changeBoundsRequest.getEditParts().size() != 1) {
// // capable of moving only one child element at a time
// return;
// }
//
// final AbstractFigureEditPart childEditPart = (AbstractFigureEditPart) changeBoundsRequest.getEditParts().get(0);
// final int newChildPosition = new GridLayoutHelper(getAbstractFigureEditPart()).getNewChildPosition(where);
// getAbstractFigureEditPart().removeChildVisual(childEditPart);
// getAbstractFigureEditPart().addChildVisual(childEditPart, newChildPosition);
}
}
@Override
public void eraseTargetFeedback(Request request) {
/**
* RequestConstants.REQ_DROP can be used here together with
* RequestConstants.REQ_MOVE due to the current
* DragEditPartsTrackerEx.handleDragInProgress() implementation.
*
* Currently .handleDragInProgress() calls:
*
* 1. updateTargetRequest() setting targetRequest type to
* getCommandName() (RequestConstants.REQ_MOVE)
*
* 2. updateTargetUnderMouse(), showTargetFeedback(),
* showSourceFeedback() using current target request with the type set
* on step 1.
*
* 3. setCurrentCommand(getCommand()); where (in addSourceCommands())
* request type will be set to RequestConstants.REQ_DROP
*
* So, showTargetFeedback(), showSourceFeedback() methods should be able
* to react on RequestConstants.REQ_MOVE. In the same time
* eraseTargetFeedback() should be sensitive to
* RequestConstants.REQ_MOVE (if it was called from
* updateTargetUnderMouse() then EditPart was exited) and
* RequestConstants.REQ_DROP (if it was called from handleButtonUp())
*
* See code for more details.
*/
if (/* RequestConstants.REQ_CREATE.equals(request.getType()) || */RequestConstants.REQ_MOVE.equals(request.getType()) || RequestConstants.REQ_DROP.equals(request.getType())) {
//[1]
if (myFeedbackFigure != null) {
getFeedbackLayer().remove(myFeedbackFigure);
myFeedbackFigure = null;
}
if (myGridFigure != null) {
getFeedbackLayer().remove(myGridFigure);
myGridFigure = null;
}
myFeedbackBoundsHelper = null;
//[2]
// getAbstractFigureEditPart().refresh();
} else {
super.eraseTargetFeedback(request);
}
}
/**
* With Grid layout move means reorder but not change layout constraints.
* Handling it in a different way.
*/
@Override
protected Command getMoveChildrenCommand(Request request) {
ChangeBoundsRequest changeBoundsRequest = (ChangeBoundsRequest) request;
IFigure figure = getLayoutContainer();
Point where = changeBoundsRequest.getLocation().getCopy();
figure.translateToRelative(where);
figure.translateFromParent(where);
where.translate(getLayoutOrigin().getNegated());
if (changeBoundsRequest.getEditParts().size() != 1) {
// capable of moving only one child element at a time
return UnexecutableCommand.INSTANCE;
}
final AbstractFigureEditPart childEditPart = (AbstractFigureEditPart) changeBoundsRequest.getEditParts().get(0);
final int newChildPosition = new GridLayoutHelper(getAbstractFigureEditPart()).getNewChildPosition(where);
return newChildPosition == -1 ? UnexecutableCommand.INSTANCE : new ICommandProxy(new AbstractTransactionalCommand(childEditPart.getEditingDomain(), "Moving child figure", Collections
.singletonList(WorkspaceSynchronizer.getFile(getRealFigure().eResource()))) {
@Override
protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
getRealFigure().getChildren().move(newChildPosition, childEditPart.getRealFigure());
getAbstractFigureEditPart().getNotationView().persistChildren();
getAbstractFigureEditPart().getNotationView().getPersistedChildren().move(newChildPosition, childEditPart.getNotationView());
// getAbstractFigureEditPart().getNotationView().getChildren().remove(childEditPart.getNotationView());
// getAbstractFigureEditPart().getNotationView().getChildren().add(newChildPosition,
// childEditPart.getNotationView());
return CommandResult.newOKCommandResult();
}
});
}
/*
* (non-Javadoc)
*
* @seeorg.eclipse.gef.editpolicies.ConstrainedLayoutEditPolicy#
* createChangeConstraintCommand(org.eclipse.gef.EditPart, java.lang.Object)
*/
@Override
protected Command createChangeConstraintCommand(EditPart child, Object constraint) {
// TODO Auto-generated method stub
return null;
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.gef.editpolicies.ConstrainedLayoutEditPolicy#getConstraintFor
* (org.eclipse.draw2d.geometry.Point)
*/
@Override
protected Object getConstraintFor(Point point) {
// TODO Auto-generated method stub
return null;
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.gef.editpolicies.ConstrainedLayoutEditPolicy#getConstraintFor
* (org.eclipse.draw2d.geometry.Rectangle)
*/
@Override
protected Object getConstraintFor(Rectangle rect) {
// TODO Auto-generated method stub
return null;
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.gef.editpolicies.LayoutEditPolicy#getCreateCommand(org.eclipse
* .gef.requests.CreateRequest)
*/
@Override
protected Command getCreateCommand(CreateRequest request) {
// TODO Auto-generated method stub
return null;
}
@Override
protected EditPolicy createChildEditPolicy(EditPart child) {
return new ResizableEditPolicy();
}
private AbstractFigureEditPart getAbstractFigureEditPart() {
return (AbstractFigureEditPart) getHost();
}
private RealFigure getRealFigure() {
return ((AbstractFigureEditPart) getHost()).getRealFigure();
}
}
