673 lines
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673 lines
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<div class="aboutLanguage"><p><b>mxGraph 4.1.0</b></p></div>
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<ul class="subNavList">
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<li>Summary: </li>
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<li>Nested | </li>
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<!-- ======== START OF CLASS DATA ======== -->
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<div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">com.mxgraph.analysis</a></div>
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<h2 title="Class mxGraphAnalysis" class="title">Class mxGraphAnalysis</h2>
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</div>
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<div class="contentContainer">
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<ul class="inheritance">
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<li>java.lang.Object</li>
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<li>
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<ul class="inheritance">
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<li>com.mxgraph.analysis.mxGraphAnalysis</li>
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</ul>
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</li>
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<div class="description">
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<pre>public class <span class="typeNameLabel">mxGraphAnalysis</span>
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extends java.lang.Object</pre>
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<div class="block">A singleton class that provides algorithms for graphs. Assume these
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variables for the following examples:<br>
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<code>
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mxICostFunction cf = mxDistanceCostFunction();
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Object[] v = graph.getChildVertices(graph.getDefaultParent());
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Object[] e = graph.getChildEdges(graph.getDefaultParent());
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mxGraphAnalysis mga = mxGraphAnalysis.getInstance();
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</code>
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<h3>Shortest Path (Dijkstra)</h3>
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For example, to find the shortest path between the first and the second
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selected cell in a graph use the following code: <br>
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<br>
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<code>Object[] path = mga.getShortestPath(graph, from, to, cf, v.length, true);</code>
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<h3>Minimum Spanning Tree</h3>
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This algorithm finds the set of edges with the minimal length that connect
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all vertices. This algorithm can be used as follows:
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<h5>Prim</h5>
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<code>mga.getMinimumSpanningTree(graph, v, cf, true))</code>
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<h5>Kruskal</h5>
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<code>mga.getMinimumSpanningTree(graph, v, e, cf))</code>
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<h3>Connection Components</h3>
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The union find may be used as follows to determine whether two cells are
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connected: <code>boolean connected = uf.differ(vertex1, vertex2)</code>.</div>
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<dl>
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<dt><span class="seeLabel">See Also:</span></dt>
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<dd><a href="mxICostFunction.html" title="interface in com.mxgraph.analysis"><code>mxICostFunction</code></a></dd>
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</dl>
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</li>
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<table class="memberSummary">
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<caption><span>Fields</span><span class="tabEnd"> </span></caption>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colSecond" scope="col">Field</th>
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<th class="colLast" scope="col">Description</th>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>protected static <a href="mxGraphAnalysis.html" title="class in com.mxgraph.analysis">mxGraphAnalysis</a></code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#instance">instance</a></span></code></th>
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<td class="colLast">
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<div class="block">Holds the shared instance of this class.</div>
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</td>
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</tr>
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</table>
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</li>
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</ul>
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<table class="memberSummary">
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
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<tr>
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<th class="colFirst" scope="col">Modifier</th>
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<th class="colSecond" scope="col">Constructor</th>
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<th class="colLast" scope="col">Description</th>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>protected </code></td>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">mxGraphAnalysis</a></span>()</code></th>
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<td class="colLast"> </td>
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</tr>
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</table>
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</li>
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</ul>
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</section>
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<!-- ========== METHOD SUMMARY =========== -->
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<h3>Method Summary</h3>
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<table class="memberSummary">
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colSecond" scope="col">Method</th>
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<th class="colLast" scope="col">Description</th>
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</tr>
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<tr id="i0" class="altColor">
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<td class="colFirst"><code>protected <a href="mxFibonacciHeap.html" title="class in com.mxgraph.analysis">mxFibonacciHeap</a></code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createPriorityQueue()">createPriorityQueue</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Hook for subclassers to provide a custom fibonacci heap.</div>
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</td>
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</tr>
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<tr id="i1" class="rowColor">
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<td class="colFirst"><code>protected <a href="mxUnionFind.html" title="class in com.mxgraph.analysis">mxUnionFind</a></code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createUnionFind(java.lang.Object%5B%5D)">createUnionFind</a></span>​(java.lang.Object[] v)</code></th>
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<td class="colLast">
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<div class="block">Hook for subclassers to provide a custom union find structure.</div>
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</td>
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</tr>
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<tr id="i2" class="altColor">
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<td class="colFirst"><code><a href="mxUnionFind.html" title="class in com.mxgraph.analysis">mxUnionFind</a></code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getConnectionComponents(com.mxgraph.view.mxGraph,java.lang.Object%5B%5D,java.lang.Object%5B%5D)">getConnectionComponents</a></span>​(<a href="../view/mxGraph.html" title="class in com.mxgraph.view">mxGraph</a> graph,
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java.lang.Object[] v,
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java.lang.Object[] e)</code></th>
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<td class="colLast">
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<div class="block">Returns a union find structure representing the connection components of
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G=(E,V).</div>
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</td>
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</tr>
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<tr id="i3" class="rowColor">
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<td class="colFirst"><code>static <a href="mxGraphAnalysis.html" title="class in com.mxgraph.analysis">mxGraphAnalysis</a></code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getInstance()">getInstance</a></span>()</code></th>
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<td class="colLast"> </td>
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</tr>
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<tr id="i4" class="altColor">
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<td class="colFirst"><code>java.lang.Object[]</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMinimumSpanningTree(com.mxgraph.view.mxGraph,java.lang.Object%5B%5D,com.mxgraph.analysis.mxICostFunction,boolean)">getMinimumSpanningTree</a></span>​(<a href="../view/mxGraph.html" title="class in com.mxgraph.view">mxGraph</a> graph,
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java.lang.Object[] v,
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<a href="mxICostFunction.html" title="interface in com.mxgraph.analysis">mxICostFunction</a> cf,
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boolean directed)</code></th>
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<td class="colLast">
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<div class="block">Returns the minimum spanning tree (MST) for the graph defined by G=(E,V).</div>
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</td>
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</tr>
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<tr id="i5" class="rowColor">
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<td class="colFirst"><code>java.lang.Object[]</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMinimumSpanningTree(com.mxgraph.view.mxGraph,java.lang.Object%5B%5D,java.lang.Object%5B%5D,com.mxgraph.analysis.mxICostFunction)">getMinimumSpanningTree</a></span>​(<a href="../view/mxGraph.html" title="class in com.mxgraph.view">mxGraph</a> graph,
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java.lang.Object[] v,
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java.lang.Object[] e,
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<a href="mxICostFunction.html" title="interface in com.mxgraph.analysis">mxICostFunction</a> cf)</code></th>
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<td class="colLast">
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<div class="block">Returns the minimum spanning tree (MST) for the graph defined by G=(E,V).</div>
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</td>
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</tr>
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<tr id="i6" class="altColor">
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<td class="colFirst"><code>java.lang.Object[]</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getShortestPath(com.mxgraph.view.mxGraph,java.lang.Object,java.lang.Object,com.mxgraph.analysis.mxICostFunction,int,boolean)">getShortestPath</a></span>​(<a href="../view/mxGraph.html" title="class in com.mxgraph.view">mxGraph</a> graph,
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java.lang.Object from,
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java.lang.Object to,
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<a href="mxICostFunction.html" title="interface in com.mxgraph.analysis">mxICostFunction</a> cf,
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int steps,
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boolean directed)</code></th>
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<td class="colLast">
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<div class="block">Returns the shortest path between two cells or their descendants
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represented as an array of edges in order of traversal.</div>
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</td>
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</tr>
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<tr id="i7" class="rowColor">
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<td class="colFirst"><code>static void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setInstance(com.mxgraph.analysis.mxGraphAnalysis)">setInstance</a></span>​(<a href="mxGraphAnalysis.html" title="class in com.mxgraph.analysis">mxGraphAnalysis</a> instance)</code></th>
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<td class="colLast">
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<div class="block">Sets the shared instance of this class.</div>
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</td>
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</tr>
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<tr id="i8" class="altColor">
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<td class="colFirst"><code><a href="../view/mxCellState.html" title="class in com.mxgraph.view">mxCellState</a>[]</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sort(com.mxgraph.view.mxCellState%5B%5D,com.mxgraph.analysis.mxICostFunction)">sort</a></span>​(<a href="../view/mxCellState.html" title="class in com.mxgraph.view">mxCellState</a>[] states,
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<a href="mxICostFunction.html" title="interface in com.mxgraph.analysis">mxICostFunction</a> cf)</code></th>
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<td class="colLast">
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<div class="block">Returns a sorted set for <code>cells</code> with respect to
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<code>cf</code>.</div>
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</td>
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</tr>
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<tr id="i9" class="rowColor">
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<td class="colFirst"><code>double</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sum(com.mxgraph.view.mxCellState%5B%5D,com.mxgraph.analysis.mxICostFunction)">sum</a></span>​(<a href="../view/mxCellState.html" title="class in com.mxgraph.view">mxCellState</a>[] states,
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<a href="mxICostFunction.html" title="interface in com.mxgraph.analysis">mxICostFunction</a> cf)</code></th>
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<td class="colLast">
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<div class="block">Returns the sum of all cost for <code>cells</code> with respect to
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<code>cf</code>.</div>
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</td>
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<h3>Methods inherited from class java.lang.Object</h3>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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</ul>
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</ul>
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</section>
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</li>
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</div>
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<h3>Field Detail</h3>
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<h4>instance</h4>
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<pre>protected static <a href="mxGraphAnalysis.html" title="class in com.mxgraph.analysis">mxGraphAnalysis</a> instance</pre>
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<div class="block">Holds the shared instance of this class.</div>
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<h3>Constructor Detail</h3>
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<a id="<init>()">
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<h4>mxGraphAnalysis</h4>
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<pre>protected mxGraphAnalysis()</pre>
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<h4>getInstance</h4>
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<pre class="methodSignature">public static <a href="mxGraphAnalysis.html" title="class in com.mxgraph.analysis">mxGraphAnalysis</a> getInstance()</pre>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>Returns the sharedInstance.</dd>
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</ul>
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<a id="setInstance(com.mxgraph.analysis.mxGraphAnalysis)">
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<h4>setInstance</h4>
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<pre class="methodSignature">public static void setInstance​(<a href="mxGraphAnalysis.html" title="class in com.mxgraph.analysis">mxGraphAnalysis</a> instance)</pre>
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<div class="block">Sets the shared instance of this class.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>instance</code> - The instance to set.</dd>
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</dl>
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</li>
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</ul>
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<a id="getShortestPath(com.mxgraph.view.mxGraph,java.lang.Object,java.lang.Object,com.mxgraph.analysis.mxICostFunction,int,boolean)">
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<h4>getShortestPath</h4>
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<pre class="methodSignature">public java.lang.Object[] getShortestPath​(<a href="../view/mxGraph.html" title="class in com.mxgraph.view">mxGraph</a> graph,
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java.lang.Object from,
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java.lang.Object to,
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<a href="mxICostFunction.html" title="interface in com.mxgraph.analysis">mxICostFunction</a> cf,
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int steps,
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boolean directed)</pre>
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<div class="block">Returns the shortest path between two cells or their descendants
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represented as an array of edges in order of traversal. <br>
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This implementation is based on the Dijkstra algorithm.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>graph</code> - The object that defines the graph structure</dd>
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<dd><code>from</code> - The source cell.</dd>
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<dd><code>to</code> - The target cell (aka sink).</dd>
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<dd><code>cf</code> - The cost function that defines the edge length.</dd>
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<dd><code>steps</code> - The maximum number of edges to traverse.</dd>
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<dd><code>directed</code> - If edge directions should be taken into account.</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>Returns the shortest path as an alternating array of vertices
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and edges, starting with <code>from</code> and ending with
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<code>to</code>.</dd>
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<dt><span class="seeLabel">See Also:</span></dt>
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<dd><a href="#createPriorityQueue()"><code>createPriorityQueue()</code></a></dd>
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</dl>
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</li>
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</ul>
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<a id="getMinimumSpanningTree(com.mxgraph.view.mxGraph,java.lang.Object[],com.mxgraph.analysis.mxICostFunction,boolean)">
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<h4>getMinimumSpanningTree</h4>
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<pre class="methodSignature">public java.lang.Object[] getMinimumSpanningTree​(<a href="../view/mxGraph.html" title="class in com.mxgraph.view">mxGraph</a> graph,
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java.lang.Object[] v,
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<a href="mxICostFunction.html" title="interface in com.mxgraph.analysis">mxICostFunction</a> cf,
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boolean directed)</pre>
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<div class="block">Returns the minimum spanning tree (MST) for the graph defined by G=(E,V).
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The MST is defined as the set of all vertices with minimal lengths that
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forms no cycles in G.<br>
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This implementation is based on the algorihm by Prim-Jarnik. It uses
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O(|E|+|V|log|V|) time when used with a Fibonacci heap and a graph whith a
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double linked-list datastructure, as is the case with the default
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implementation.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>graph</code> - the object that describes the graph</dd>
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<dd><code>v</code> - the vertices of the graph</dd>
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<dd><code>cf</code> - the cost function that defines the edge length</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>Returns the MST as an array of edges</dd>
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<dt><span class="seeLabel">See Also:</span></dt>
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<dd><a href="#createPriorityQueue()"><code>createPriorityQueue()</code></a></dd>
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</dl>
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</li>
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</ul>
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<a id="getMinimumSpanningTree(com.mxgraph.view.mxGraph,java.lang.Object[],java.lang.Object[],com.mxgraph.analysis.mxICostFunction)">
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<h4>getMinimumSpanningTree</h4>
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<pre class="methodSignature">public java.lang.Object[] getMinimumSpanningTree​(<a href="../view/mxGraph.html" title="class in com.mxgraph.view">mxGraph</a> graph,
|
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java.lang.Object[] v,
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java.lang.Object[] e,
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<a href="mxICostFunction.html" title="interface in com.mxgraph.analysis">mxICostFunction</a> cf)</pre>
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<div class="block">Returns the minimum spanning tree (MST) for the graph defined by G=(E,V).
|
|
The MST is defined as the set of all vertices with minimal lenths that
|
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forms no cycles in G.<br>
|
|
This implementation is based on the algorihm by Kruskal. It uses
|
|
O(|E|log|E|)=O(|E|log|V|) time for sorting the edges, O(|V|) create sets,
|
|
O(|E|) find and O(|V|) union calls on the union find structure, thus
|
|
yielding no more than O(|E|log|V|) steps. For a faster implementatin</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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|
<dd><code>graph</code> - The object that contains the graph.</dd>
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<dd><code>v</code> - The vertices of the graph.</dd>
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<dd><code>e</code> - The edges of the graph.</dd>
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<dd><code>cf</code> - The cost function that defines the edge length.</dd>
|
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<dt><span class="returnLabel">Returns:</span></dt>
|
|
<dd>Returns the MST as an array of edges.</dd>
|
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<dt><span class="seeLabel">See Also:</span></dt>
|
|
<dd><a href="#getMinimumSpanningTree(com.mxgraph.view.mxGraph,java.lang.Object%5B%5D,com.mxgraph.analysis.mxICostFunction,boolean)"><code>getMinimumSpanningTree(mxGraph, Object[], mxICostFunction,
|
|
boolean)</code></a>,
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|
<a href="#createUnionFind(java.lang.Object%5B%5D)"><code>createUnionFind(Object[])</code></a></dd>
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</dl>
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</li>
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</ul>
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<a id="getConnectionComponents(com.mxgraph.view.mxGraph,java.lang.Object[],java.lang.Object[])">
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<h4>getConnectionComponents</h4>
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<pre class="methodSignature">public <a href="mxUnionFind.html" title="class in com.mxgraph.analysis">mxUnionFind</a> getConnectionComponents​(<a href="../view/mxGraph.html" title="class in com.mxgraph.view">mxGraph</a> graph,
|
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java.lang.Object[] v,
|
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java.lang.Object[] e)</pre>
|
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<div class="block">Returns a union find structure representing the connection components of
|
|
G=(E,V).</div>
|
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<dl>
|
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<dt><span class="paramLabel">Parameters:</span></dt>
|
|
<dd><code>graph</code> - The object that contains the graph.</dd>
|
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<dd><code>v</code> - The vertices of the graph.</dd>
|
|
<dd><code>e</code> - The edges of the graph.</dd>
|
|
<dt><span class="returnLabel">Returns:</span></dt>
|
|
<dd>Returns the connection components in G=(E,V)</dd>
|
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<dt><span class="seeLabel">See Also:</span></dt>
|
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<dd><a href="#createUnionFind(java.lang.Object%5B%5D)"><code>createUnionFind(Object[])</code></a></dd>
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</dl>
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</li>
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</ul>
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<a id="sort(com.mxgraph.view.mxCellState[],com.mxgraph.analysis.mxICostFunction)">
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<h4>sort</h4>
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<pre class="methodSignature">public <a href="../view/mxCellState.html" title="class in com.mxgraph.view">mxCellState</a>[] sort​(<a href="../view/mxCellState.html" title="class in com.mxgraph.view">mxCellState</a>[] states,
|
|
<a href="mxICostFunction.html" title="interface in com.mxgraph.analysis">mxICostFunction</a> cf)</pre>
|
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<div class="block">Returns a sorted set for <code>cells</code> with respect to
|
|
<code>cf</code>.</div>
|
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<dl>
|
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<dt><span class="paramLabel">Parameters:</span></dt>
|
|
<dd><code>states</code> - the cell states to sort</dd>
|
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<dd><code>cf</code> - the cost function that defines the order</dd>
|
|
<dt><span class="returnLabel">Returns:</span></dt>
|
|
<dd>Returns an ordered set of <code>cells</code> wrt.
|
|
<code>cf</code></dd>
|
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</dl>
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</li>
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</ul>
|
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<a id="sum(com.mxgraph.view.mxCellState[],com.mxgraph.analysis.mxICostFunction)">
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<h4>sum</h4>
|
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<pre class="methodSignature">public double sum​(<a href="../view/mxCellState.html" title="class in com.mxgraph.view">mxCellState</a>[] states,
|
|
<a href="mxICostFunction.html" title="interface in com.mxgraph.analysis">mxICostFunction</a> cf)</pre>
|
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<div class="block">Returns the sum of all cost for <code>cells</code> with respect to
|
|
<code>cf</code>.</div>
|
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<dl>
|
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<dt><span class="paramLabel">Parameters:</span></dt>
|
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<dd><code>states</code> - the cell states to use for the sum</dd>
|
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<dd><code>cf</code> - the cost function that defines the costs</dd>
|
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<dt><span class="returnLabel">Returns:</span></dt>
|
|
<dd>Returns the sum of all cell cost</dd>
|
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</dl>
|
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</li>
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</ul>
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<a id="createUnionFind(java.lang.Object[])">
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<h4>createUnionFind</h4>
|
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<pre class="methodSignature">protected <a href="mxUnionFind.html" title="class in com.mxgraph.analysis">mxUnionFind</a> createUnionFind​(java.lang.Object[] v)</pre>
|
|
<div class="block">Hook for subclassers to provide a custom union find structure.</div>
|
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<dl>
|
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<dt><span class="paramLabel">Parameters:</span></dt>
|
|
<dd><code>v</code> - the array of all elements</dd>
|
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<dt><span class="returnLabel">Returns:</span></dt>
|
|
<dd>Returns a union find structure for <code>v</code></dd>
|
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</dl>
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</li>
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</ul>
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<a id="createPriorityQueue()">
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</a>
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<ul class="blockListLast">
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<h4>createPriorityQueue</h4>
|
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<pre class="methodSignature">protected <a href="mxFibonacciHeap.html" title="class in com.mxgraph.analysis">mxFibonacciHeap</a> createPriorityQueue()</pre>
|
|
<div class="block">Hook for subclassers to provide a custom fibonacci heap.</div>
|
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</li>
|
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</ul>
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</li>
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</ul>
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</section>
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</li>
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