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/*******************************************************************************
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* Copyright (c) 2000, 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package org.eclipse.gef.handles;
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import org.eclipse.draw2d.IFigure;
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import org.eclipse.draw2d.Locator;
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import org.eclipse.draw2d.geometry.Insets;
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import org.eclipse.draw2d.geometry.PrecisionRectangle;
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import org.eclipse.draw2d.geometry.Rectangle;
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/**
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* A Locator used to place {@link MoveHandle}s. By default, a MoveHandle's
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* bounds are equal to its owner figure's bounds, expanded by the handle's
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* {@link Insets}.
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*/
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public class MoveHandleLocator implements Locator {
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private IFigure reference;
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/**
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* Creates a new MoveHandleLocator and sets its reference figure to
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* <code>ref</code>. The reference figure should be the handle's owner
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* figure.
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*
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* @param ref
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* the handle's owner
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*/
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public MoveHandleLocator(IFigure ref) {
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setReference(ref);
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}
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/**
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* Returns the reference figure for this locator.
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*
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* @return the handle's owner
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*/
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protected IFigure getReference() {
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return reference;
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}
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/**
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* Sets the handle's bounds to that of its owner figure's bounds, expanded
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* by the handle's Insets.
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*
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* @param target
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* The IFigure to relocate
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*/
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public void relocate(IFigure target) {
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Insets insets = target.getInsets();
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Rectangle bounds;
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if (getReference() instanceof HandleBounds)
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bounds = ((HandleBounds) getReference()).getHandleBounds();
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else
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bounds = getReference().getBounds();
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bounds = new PrecisionRectangle(bounds.getResized(-1, -1));
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getReference().translateToAbsolute(bounds);
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target.translateToRelative(bounds);
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bounds.translate(-insets.left, -insets.top);
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bounds.resize(insets.getWidth() + 1, insets.getHeight() + 1);
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target.setBounds(bounds);
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}
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/**
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* Sets the reference figure.
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*
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* @param follow
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* the reference figure, should be the handle's owner figure
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*/
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public void setReference(IFigure follow) {
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this.reference = follow;
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}
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}
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