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annotate dwtx/draw2d/ArrowLocator.d @ 98:95307ad235d9

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Added Draw2d code, still work in progress
author Frank Benoit <benoit@tionex.de>
date Sun, 03 Aug 2008 00:52:14 +0200
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.draw2d.ArrowLocator;
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14
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15 import dwt.dwthelper.utils;
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16
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17 import dwtx.draw2d.geometry.PointList;
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18 import dwtx.draw2d.ConnectionLocator;
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19 import dwtx.draw2d.IFigure;
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20 import dwtx.draw2d.Connection;
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21 import dwtx.draw2d.RotatableDecoration;
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22
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23 /**
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24 * Locator used to place a {@link RotatableDecoration} on a {@link Connection}. The
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25 * decoration can be placed at the source or target end of the connection figure. The
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26 * default connection implementation uses a {@link DelegatingLayout} which requires
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27 * locators.
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28 */
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29 public class ArrowLocator : ConnectionLocator {
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30
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31 /**
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32 * Constructs an ArrowLocator associated with passed connection and tip location (either
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33 * {@link ConnectionLocator#SOURCE} or {@link ConnectionLocator#TARGET}).
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34 *
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35 * @param connection The connection associated with the locator
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36 * @param location Location of the arrow decoration
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37 * @since 2.0
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38 */
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39 public this(Connection connection, int location) {
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40 super(connection, location);
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41 }
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42
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43 /**
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44 * Relocates the passed in figure (which must be a {@link RotatableDecoration}) at either
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45 * the start or end of the connection.
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46 * @param target The RotatableDecoration to relocate
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47 */
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48 public void relocate(IFigure target) {
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49 PointList points = getConnection().getPoints();
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50 RotatableDecoration arrow = cast(RotatableDecoration)target;
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51 arrow.setLocation(getLocation(points));
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52
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53 if (getAlignment() is SOURCE)
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54 arrow.setReferencePoint(points.getPoint(1));
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55 else if (getAlignment() is TARGET)
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56 arrow.setReferencePoint(points.getPoint(points.size() - 2));
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57 }
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58
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59 }