| /******************************************************************************* |
| * Copyright (c) 2000, 2010 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.gef.handles; |
| |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.Cursor; |
| |
| import org.eclipse.draw2d.ColorConstants; |
| import org.eclipse.draw2d.Graphics; |
| import org.eclipse.draw2d.Locator; |
| import org.eclipse.draw2d.geometry.Dimension; |
| import org.eclipse.draw2d.geometry.Rectangle; |
| |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.gef.GraphicalEditPart; |
| |
| /** |
| * A small square handle approximately 7x7 pixels in size, that is either black |
| * or white. |
| */ |
| public abstract class SquareHandle extends AbstractHandle { |
| |
| /** |
| * The default size for square handles. |
| */ |
| protected static final int DEFAULT_HANDLE_SIZE = 7; |
| |
| { |
| init(); |
| } |
| |
| /** |
| * Null constructor |
| */ |
| public SquareHandle() { |
| } |
| |
| /** |
| * Creates a SquareHandle for the given <code>GraphicalEditPart</code> with |
| * the given <code>Locator</code>. |
| * |
| * @param owner |
| * the owner |
| * @param loc |
| * the locator |
| */ |
| public SquareHandle(GraphicalEditPart owner, Locator loc) { |
| super(owner, loc); |
| } |
| |
| /** |
| * Creates a SquareHandle for the given <code>GraphicalEditPart</code> with |
| * the given <code>Cursor</code> using the given <code>Locator</code>. |
| * |
| * @param owner |
| * The editpart which provided this handle |
| * @param loc |
| * The locator to position the handle |
| * @param c |
| * The cursor to display when the mouse is over the handle |
| */ |
| public SquareHandle(GraphicalEditPart owner, Locator loc, Cursor c) { |
| super(owner, loc, c); |
| } |
| |
| /** |
| * Returns the color for the outside of the handle. |
| * |
| * @return the color for the border |
| */ |
| protected Color getBorderColor() { |
| return (isPrimary()) ? ColorConstants.white : ColorConstants.black; |
| } |
| |
| /** |
| * Returns the color for the inside of the handle. |
| * |
| * @return the color of the handle |
| */ |
| protected Color getFillColor() { |
| return (isPrimary()) ? ColorConstants.black : ColorConstants.white; |
| } |
| |
| /** |
| * Initializes the handle. |
| */ |
| protected void init() { |
| setPreferredSize(new Dimension(DEFAULT_HANDLE_SIZE, DEFAULT_HANDLE_SIZE)); |
| } |
| |
| /** |
| * Returns <code>true</code> if the handle's owner is the primary selection. |
| * |
| * @return <code>true</code> if the handles owner has primary selection. |
| */ |
| protected boolean isPrimary() { |
| return getOwner().getSelected() == EditPart.SELECTED_PRIMARY; |
| } |
| |
| /** |
| * Draws the handle with fill color and outline color dependent on the |
| * primary selection status of the owner editpart. |
| * |
| * @param g |
| * The graphics used to paint the figure. |
| */ |
| public void paintFigure(Graphics g) { |
| Rectangle r = getBounds(); |
| r.shrink(1, 1); |
| try { |
| g.setBackgroundColor(getFillColor()); |
| g.fillRectangle(r.x, r.y, r.width, r.height); |
| g.setForegroundColor(getBorderColor()); |
| g.drawRectangle(r.x, r.y, r.width, r.height); |
| } finally { |
| // We don't really own rect 'r', so fix it. |
| r.expand(1, 1); |
| } |
| } |
| |
| } |