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annotate dwtx/draw2d/graph/VerticalPlacement.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) 2003, 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.graph.VerticalPlacement;
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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.Insets;
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18 import dwtx.draw2d.graph.GraphVisitor;
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19 import dwtx.draw2d.graph.DirectedGraph;
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20 import dwtx.draw2d.graph.Rank;
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21 import dwtx.draw2d.graph.Node;
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22
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23 /**
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24 * Assigns the Y and Height values to the nodes in the graph. All nodes in the same row
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25 * are given the same height.
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26 * @author Randy Hudson
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27 * @since 2.1.2
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28 */
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29 class VerticalPlacement : GraphVisitor {
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30
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31 void visit(DirectedGraph g) {
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32 Insets pad;
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33 int currentY = g.getMargin().top;
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34 int row, rowHeight;
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35 g.rankLocations = new int[g.ranks.size() + 1];
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36 for (row = 0; row < g.ranks.size(); row++) {
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37 g.rankLocations[row] = currentY;
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38 Rank rank = g.ranks.getRank(row);
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39 rowHeight = 0;
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40 rank.topPadding = rank.bottomPadding = 0;
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41 for (int n = 0; n < rank.size(); n++) {
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42 Node node = rank.getNode(n);
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43 pad = g.getPadding(node);
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44 rowHeight = Math.max(node.height, rowHeight);
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45 rank.topPadding = Math.max(pad.top, rank.topPadding);
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46 rank.bottomPadding = Math.max(pad.bottom, rank.bottomPadding);
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47 }
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48 currentY += rank.topPadding;
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49 rank.setDimensions(currentY, rowHeight);
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50 currentY += rank.height + rank.bottomPadding;
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51 }
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52 g.rankLocations[row] = currentY;
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53 g.size.height = currentY;
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54 }
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55
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56 }