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/*****************************************************************************
* Copyright (c) 2017 CEA LIST and others.
*
* 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:
* Celine Janssens (celine.janssens@all4tec.net) - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.sequence.locator;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.papyrus.uml.diagram.common.locator.AdvancedBorderItemLocator;
import org.eclipse.papyrus.uml.diagram.sequence.edit.parts.LifelineEditPart;
/**
* @author Celine JANSSENS
* This class is used for Duration Constraint (@see {@link LifelineEditPart}) in order to locate it just next to the middle of it's parent (the Lifeline) on the X axe.
* The Y Axe is free except if the top is upper than its Parent.
*/
public class DurationConstraintLocator extends AdvancedBorderItemLocator {
/**
* Constructor.
*
* @param borderItem
* @param parentFigure
* @param constraint
*/
public DurationConstraintLocator(IFigure borderItem, IFigure parentFigure, Rectangle constraint) {
super(borderItem, parentFigure, constraint);
}
/**
* Constructor.
*
*/
public DurationConstraintLocator(IFigure parentFigure) {
super(parentFigure);
}
/**
* Constructor.
*
*/
public DurationConstraintLocator(IFigure parentFigure, int position) {
super(parentFigure, position);
}
/**
* @see org.eclipse.papyrus.uml.diagram.common.locator.AdvancedBorderItemLocator#relocate(org.eclipse.draw2d.IFigure)
*
* @param borderItem
*/
@Override
public void relocate(IFigure borderItem) {
Dimension size = getSize(borderItem);
// The returned constraint is relative to the parent
Rectangle rectSuggested = getConstraint();
rectSuggested.setSize(size);
// transform it to absolute
Rectangle suggestedRectIndiagram = rectSuggested.getCopy();
suggestedRectIndiagram.x = suggestedRectIndiagram.x + getParentFigure().getBounds().x;
suggestedRectIndiagram.y = suggestedRectIndiagram.y + getParentFigure().getBounds().y;
// get the valid Location in Absolute coordinates
suggestedRectIndiagram = getValidLocation(suggestedRectIndiagram, borderItem);
// transform it back in relative coordinate to its parent.
borderItem.setBounds(suggestedRectIndiagram.getCopy());
suggestedRectIndiagram.x = suggestedRectIndiagram.x - getParentFigure().getBounds().x;
suggestedRectIndiagram.y = suggestedRectIndiagram.y - getParentFigure().getBounds().y;
// Set the new Constraint in Relative.
setConstraint(suggestedRectIndiagram);
}
/**
*
* The Valid location for a Duration Constraint is just next to the center of its parent (the lifeline).
*
* @see org.eclipse.papyrus.uml.diagram.common.locator.AdvancedBorderItemLocator#getValidLocation(org.eclipse.draw2d.geometry.Rectangle, org.eclipse.draw2d.IFigure)
*
* @param proposedLocation
* @param borderItem
* @return
*/
@Override
public Rectangle getValidLocation(Rectangle proposedLocation, IFigure borderItem) {
// the offset required to take the Lifeline Header height into account
int headerYOffset = 20;
int parentMiddleX = getParentFigure().getBounds().x + (getParentFigure().getBounds().width / 2);
// Place the DurationConstraint Just next to the lifeline (right or left depends on the proposedLocation )
if (proposedLocation.x < parentMiddleX) {
proposedLocation.setX(parentMiddleX - proposedLocation.width());
} else {
proposedLocation.setX(parentMiddleX);
}
// If the proposed Location is upper than the Parent Figure (The lifeline) , then set the location as close as possible from the top of the parent.
if (proposedLocation.y < getParentFigure().getBounds().y + headerYOffset) {
proposedLocation.setY(getParentFigure().getBounds().y + headerYOffset);
}
// If the DurationConstraint is out of the Lifeline bottom then relocate it into the Lifeline
if (proposedLocation.y + proposedLocation.height > getParentFigure().getBounds().bottom()) {
proposedLocation.setY(getParentFigure().getBounds().bottom() - proposedLocation.height);
}
return super.getValidLocation(proposedLocation, borderItem);
}
}
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