/*******************************************************************************
* Copyright (c) 2010-2015 Henshin developers. 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:
* TU Berlin, University of Luxembourg, SES S.A.
*******************************************************************************/
package de.tub.tfs.muvitor.actions;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.eclipse.draw2d.PositionConstants;
import org.eclipse.draw2d.geometry.PrecisionRectangle;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.RequestConstants;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.CompoundCommand;
import org.eclipse.gef.internal.GEFMessages;
import org.eclipse.gef.internal.InternalImages;
import org.eclipse.gef.requests.AlignmentRequest;
import org.eclipse.gef.tools.ToolUtilities;
import org.eclipse.gef.ui.actions.AlignmentAction;
import org.eclipse.gef.ui.actions.GEFActionConstants;
import org.eclipse.gef.ui.actions.SelectionAction;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPart;
public class MuvitorAlignmentAction extends SelectionAction {
/**
* Indicates that the bottom edges should be aligned.
*/
public static final String ID_ALIGN_BOTTOM = GEFActionConstants.ALIGN_BOTTOM;
/**
* Indicates that the horizontal centers should be aligned.
*/
public static final String ID_ALIGN_CENTER = GEFActionConstants.ALIGN_CENTER;
/**
* Indicates that the left edges should be aligned.
*/
public static final String ID_ALIGN_LEFT = GEFActionConstants.ALIGN_LEFT;
/**
* Indicates that the vertical midpoints should be aligned.
*/
public static final String ID_ALIGN_MIDDLE = GEFActionConstants.ALIGN_MIDDLE;
/**
* Indicates that the right edges should be aligned.
*/
public static final String ID_ALIGN_RIGHT = GEFActionConstants.ALIGN_RIGHT;
/**
* Indicates that the top edges should be aligned.
*/
public static final String ID_ALIGN_TOP = GEFActionConstants.ALIGN_TOP;
private int alignment;
private List operationSet;
/**
* @deprecated use AlignmentAction(IWorkbenchPart, int align)
* @param editor
* the editor
* @param align
* the alignment ID
*/
public MuvitorAlignmentAction(IEditorPart editor, int align) {
this((IWorkbenchPart) editor, align);
}
/**
* Constructs an AlignmentAction with the given part and alignment ID. The
* alignment ID must by one of:
* <UL>
* <LI>GEFActionConstants.ALIGN_LEFT
* <LI>GEFActionConstants.ALIGN_RIGHT
* <LI>GEFActionConstants.ALIGN_CENTER
* <LI>GEFActionConstants.ALIGN_TOP
* <LI>GEFActionConstants.ALIGN_BOTTOM
* <LI>GEFActionConstants.ALIGN_MIDDLE
* </UL>
*
* @param part
* the workbench part used to obtain context
* @param align
* the aligment ID.
*/
public MuvitorAlignmentAction(IWorkbenchPart part, int align) {
super(part);
alignment = align;
initUI();
}
/**
* Returns the alignment rectangle to which all selected parts should be
* aligned.
*
* @param request
* the alignment Request
* @return the alignment rectangle
*/
protected Rectangle calculateAlignmentRectangle(Request request) {
List editparts = getOperationSet(request);
if (editparts == null || editparts.isEmpty())
return null;
GraphicalEditPart part = (GraphicalEditPart) editparts.get(editparts
.size() - 1);
Rectangle rect = new PrecisionRectangle(part.getFigure().getBounds());
part.getFigure().translateToAbsolute(rect);
return rect;
}
/**
* @see org.eclipse.gef.ui.actions.WorkbenchPartAction#calculateEnabled()
*/
protected boolean calculateEnabled() {
operationSet = null;
Command cmd = createAlignmentCommand();
if (cmd == null)
return false;
return cmd.canExecute();
}
private Command createAlignmentCommand() {
AlignmentRequest request = new AlignmentRequest(
RequestConstants.REQ_ALIGN);
request.setAlignmentRectangle(calculateAlignmentRectangle(request));
request.setAlignment(alignment);
List editparts = getOperationSet(request);
if (editparts.size() < 2)
return null;
CompoundCommand command = new CompoundCommand();
command.setDebugLabel(getText());
for (int i = 0; i < editparts.size(); i++) {
EditPart editpart = (EditPart) editparts.get(i);
command.add(editpart.getCommand(request));
}
return command;
}
/**
* @see org.eclipse.gef.Disposable#dispose()
*/
public void dispose() {
operationSet = Collections.EMPTY_LIST;
super.dispose();
}
/**
* Returns the list of editparts which will participate in alignment.
*
* @param request
* the alignment request
* @return the list of parts which will be aligned
*/
protected List getOperationSet(Request request) {
if (operationSet != null)
return operationSet;
List editparts = new ArrayList(getSelectedObjects());
if (editparts.isEmpty()
|| !(editparts.get(0) instanceof GraphicalEditPart))
return Collections.EMPTY_LIST;
editparts = ToolUtilities.getSelectionWithoutDependants(editparts);
ToolUtilities.filterEditPartsUnderstanding(editparts, request);
if (editparts.isEmpty())
return Collections.EMPTY_LIST;
Object primary = editparts.get(editparts.size() - 1);
if (editparts.size() < 2 || !editparts.contains(primary))
return Collections.EMPTY_LIST;
EditPart parent = ((EditPart) editparts.get(0)).getParent();
for (int i = 1; i < editparts.size(); i++) {
EditPart part = (EditPart) editparts.get(i);
if (part.getParent() != parent)
return Collections.EMPTY_LIST;
}
return editparts;
}
/**
* Initializes the actions UI presentation.
*/
protected void initUI() {
switch (alignment) {
case PositionConstants.LEFT:
setId(GEFActionConstants.ALIGN_LEFT);
setText(GEFMessages.AlignLeftAction_Label);
setToolTipText(GEFMessages.AlignLeftAction_Tooltip);
setImageDescriptor(InternalImages.DESC_HORZ_ALIGN_LEFT);
setDisabledImageDescriptor(InternalImages.DESC_HORZ_ALIGN_LEFT_DIS);
break;
case PositionConstants.RIGHT:
setId(GEFActionConstants.ALIGN_RIGHT);
setText(GEFMessages.AlignRightAction_Label);
setToolTipText(GEFMessages.AlignRightAction_Tooltip);
setImageDescriptor(InternalImages.DESC_HORZ_ALIGN_RIGHT);
setDisabledImageDescriptor(InternalImages.DESC_HORZ_ALIGN_RIGHT_DIS);
break;
case PositionConstants.TOP:
setId(GEFActionConstants.ALIGN_TOP);
setText(GEFMessages.AlignTopAction_Label);
setToolTipText(GEFMessages.AlignTopAction_Tooltip);
setImageDescriptor(InternalImages.DESC_VERT_ALIGN_TOP);
setDisabledImageDescriptor(InternalImages.DESC_VERT_ALIGN_TOP_DIS);
break;
case PositionConstants.BOTTOM:
setId(GEFActionConstants.ALIGN_BOTTOM);
setText(GEFMessages.AlignBottomAction_Label);
setToolTipText(GEFMessages.AlignBottomAction_Tooltip);
setImageDescriptor(InternalImages.DESC_VERT_ALIGN_BOTTOM);
setDisabledImageDescriptor(InternalImages.DESC_VERT_ALIGN_BOTTOM_DIS);
break;
case PositionConstants.CENTER:
setId(GEFActionConstants.ALIGN_CENTER);
setText(GEFMessages.AlignCenterAction_Label);
setToolTipText(GEFMessages.AlignCenterAction_Tooltip);
setImageDescriptor(InternalImages.DESC_HORZ_ALIGN_CENTER);
setDisabledImageDescriptor(InternalImages.DESC_HORZ_ALIGN_CENTER_DIS);
break;
case PositionConstants.MIDDLE:
setId(GEFActionConstants.ALIGN_MIDDLE);
setText(GEFMessages.AlignMiddleAction_Label);
setToolTipText(GEFMessages.AlignMiddleAction_Tooltip);
setImageDescriptor(InternalImages.DESC_VERT_ALIGN_MIDDLE);
setDisabledImageDescriptor(InternalImages.DESC_VERT_ALIGN_MIDDLE_DIS);
break;
}
}
/**
* @see org.eclipse.jface.action.IAction#run()
*/
public void run() {
operationSet = null;
execute(createAlignmentCommand());
}
}