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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.Cursors;
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import org.eclipse.draw2d.LineBorder;
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import org.eclipse.draw2d.Locator;
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import org.eclipse.draw2d.geometry.Point;
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import org.eclipse.draw2d.geometry.Rectangle;
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import org.eclipse.gef.DragTracker;
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import org.eclipse.gef.GraphicalEditPart;
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import org.eclipse.gef.tools.DragEditPartsTracker;
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/**
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* A Handle used for moving {@link GraphicalEditPart}s.
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*/
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public class MoveHandle extends AbstractHandle {
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/**
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* The hit-threshold for {@link #containsPoint(int, int)}.
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*
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* @deprecated subclasses should not reference this field.
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*/
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protected static final int INNER_PAD = 2;
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/**
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* Creates a MoveHandle for the given <code>GraphicalEditPart</code> using a
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* default {@link Locator}.
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*
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* @param owner
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* The GraphicalEditPart to be moved by this handle.
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*/
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public MoveHandle(GraphicalEditPart owner) {
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this(owner, new MoveHandleLocator(owner.getFigure()));
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}
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/**
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* Creates a MoveHandle for the given <code>GraphicalEditPart</code> using
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* the given <code>Locator</code>.
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*
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* @param owner
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* The GraphicalEditPart to be moved by this handle.
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* @param loc
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* The Locator used to place the handle.
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*/
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public MoveHandle(GraphicalEditPart owner, Locator loc) {
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super(owner, loc);
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initialize();
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}
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/**
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* Overridden to create a {@link DragEditPartsTracker}.
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*
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* @see org.eclipse.gef.handles.AbstractHandle#createDragTracker()
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*/
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protected DragTracker createDragTracker() {
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DragEditPartsTracker tracker = new DragEditPartsTracker(getOwner());
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tracker.setDefaultCursor(getCursor());
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return tracker;
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}
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/**
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* Returns <code>true</code> if the point (x,y) is contained within this
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* handle.
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*
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* @param x
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* The x coordinate.
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* @param y
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* The y coordinate.
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* @return <code>true</code> if the point (x,y) is contained within this
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* handle.
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*/
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public boolean containsPoint(int x, int y) {
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if (!super.containsPoint(x, y))
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return false;
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return !Rectangle.SINGLETON.setBounds(getBounds())
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.shrink(INNER_PAD, INNER_PAD).contains(x, y);
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}
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/**
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* Returns a point along the right edge of the handle.
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*
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* @see org.eclipse.gef.Handle#getAccessibleLocation()
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*/
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public Point getAccessibleLocation() {
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Point p = getBounds().getTopRight().translate(-1,
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getBounds().height / 4);
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translateToAbsolute(p);
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return p;
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}
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/**
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* Initializes the handle. Sets the {@link DragTracker} and DragCursor.
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*/
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protected void initialize() {
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setOpaque(false);
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setBorder(new LineBorder(1));
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setCursor(Cursors.SIZEALL);
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}
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}
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