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<h2 title="Class mxGraphSelectionModel" class="title">Class mxGraphSelectionModel</h2>
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<li>java.lang.Object</li>
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<li>com.mxgraph.view.mxGraphSelectionModel</li>
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<pre>public class <span class="typeNameLabel">mxGraphSelectionModel</span>
extends <a href="../util/mxEventSource.html" title="class in com.mxgraph.util">mxEventSource</a></pre>
<div class="block">Implements the selection model for a graph.
This class fires the following events:
mxEvent.UNDO fires after the selection was changed in changeSelection. The
<code>edit</code> property contains the mxUndoableEdit which contains the
mxSelectionChange.
mxEvent.CHANGE fires after the selection changes by executing an
mxSelectionChange. The <code>added</code> and <code>removed</code>
properties contain Collections of cells that have been added to or removed
from the selection, respectively.
NOTE: Due to a historic bug that cannot be changed at this point the
names of the properties are "reversed".
To add a change listener to the graph selection model:
<code>
addListener(
mxEvent.CHANGE, new mxIEventListener()
{
public void invoke(Object sender, mxEventObject evt)
{
mxGraphSelectionModel model = (mxSelectionModel) sender;
Collection added = (Collection) evt.getProperty("added");
Collection removed = (Collection) evt.getProperty("removed");
selectionChanged(model, added, removed);
}
});
</code></div>
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<td class="colFirst"><code>static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="mxGraphSelectionModel.mxSelectionChange.html" title="class in com.mxgraph.view">mxGraphSelectionModel.mxSelectionChange</a></span></code></th>
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<code><a href="../util/mxEventSource.mxIEventListener.html" title="interface in com.mxgraph.util">mxEventSource.mxIEventListener</a></code></li>
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<td class="colFirst"><code>protected java.util.Set&lt;java.lang.Object&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#cells">cells</a></span></code></th>
<td class="colLast">
<div class="block">Holds the selection cells.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="mxGraph.html" title="class in com.mxgraph.view">mxGraph</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#graph">graph</a></span></code></th>
<td class="colLast">
<div class="block">Reference to the enclosing graph.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code>protected boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#singleSelection">singleSelection</a></span></code></th>
<td class="colLast">
<div class="block">Specifies if only one selected item at a time is allowed.</div>
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<code><a href="../util/mxEventSource.html#eventListeners">eventListeners</a>, <a href="../util/mxEventSource.html#eventsEnabled">eventsEnabled</a>, <a href="../util/mxEventSource.html#eventSource">eventSource</a></code></li>
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<th class="colFirst" scope="col">Constructor</th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(com.mxgraph.view.mxGraph)">mxGraphSelectionModel</a></span>&#8203;(<a href="mxGraph.html" title="class in com.mxgraph.view">mxGraph</a>&nbsp;graph)</code></th>
<td class="colLast">
<div class="block">Constructs a new selection model for the specified graph.</div>
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<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addCell(java.lang.Object)">addCell</a></span>&#8203;(java.lang.Object&nbsp;cell)</code></th>
<td class="colLast">
<div class="block">Adds the given cell to the selection.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addCells(java.lang.Object%5B%5D)">addCells</a></span>&#8203;(java.lang.Object[]&nbsp;cells)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#cellAdded(java.lang.Object)">cellAdded</a></span>&#8203;(java.lang.Object&nbsp;cell)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#cellRemoved(java.lang.Object)">cellRemoved</a></span>&#8203;(java.lang.Object&nbsp;cell)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#changeSelection(java.util.Collection,java.util.Collection)">changeSelection</a></span>&#8203;(java.util.Collection&lt;java.lang.Object&gt;&nbsp;added,
java.util.Collection&lt;java.lang.Object&gt;&nbsp;removed)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#clear()">clear</a></span>()</code></th>
<td class="colLast">
<div class="block">Clears the selection.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getCell()">getCell</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the first selected cell.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>java.lang.Object[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getCells()">getCells</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the selection cells.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>protected java.lang.Object</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getFirstSelectableCell(java.lang.Object%5B%5D)">getFirstSelectableCell</a></span>&#8203;(java.lang.Object[]&nbsp;cells)</code></th>
<td class="colLast">
<div class="block">Returns the first selectable cell in the given array of cells.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isEmpty()">isEmpty</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns true if no cells are selected.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isSelected(java.lang.Object)">isSelected</a></span>&#8203;(java.lang.Object&nbsp;cell)</code></th>
<td class="colLast">
<div class="block">Returns true if the given cell is selected.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isSingleSelection()">isSingleSelection</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeCell(java.lang.Object)">removeCell</a></span>&#8203;(java.lang.Object&nbsp;cell)</code></th>
<td class="colLast">
<div class="block">Removes the given cell from the selection.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeCells(java.lang.Object%5B%5D)">removeCells</a></span>&#8203;(java.lang.Object[]&nbsp;cells)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setCell(java.lang.Object)">setCell</a></span>&#8203;(java.lang.Object&nbsp;cell)</code></th>
<td class="colLast">
<div class="block">Clears the selection and adds the given cell to the selection.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setCells(java.lang.Object%5B%5D)">setCells</a></span>&#8203;(java.lang.Object[]&nbsp;cells)</code></th>
<td class="colLast">
<div class="block">Clears the selection and adds the given cells.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setSingleSelection(boolean)">setSingleSelection</a></span>&#8203;(boolean&nbsp;singleSelection)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#size()">size</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the number of selected cells.</div>
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<h3>Methods inherited from class&nbsp;com.mxgraph.util.<a href="../util/mxEventSource.html" title="class in com.mxgraph.util">mxEventSource</a></h3>
<code><a href="../util/mxEventSource.html#addListener(java.lang.String,com.mxgraph.util.mxEventSource.mxIEventListener)">addListener</a>, <a href="../util/mxEventSource.html#fireEvent(com.mxgraph.util.mxEventObject)">fireEvent</a>, <a href="../util/mxEventSource.html#fireEvent(com.mxgraph.util.mxEventObject,java.lang.Object)">fireEvent</a>, <a href="../util/mxEventSource.html#getEventSource()">getEventSource</a>, <a href="../util/mxEventSource.html#isEventsEnabled()">isEventsEnabled</a>, <a href="../util/mxEventSource.html#removeListener(com.mxgraph.util.mxEventSource.mxIEventListener)">removeListener</a>, <a href="../util/mxEventSource.html#removeListener(com.mxgraph.util.mxEventSource.mxIEventListener,java.lang.String)">removeListener</a>, <a href="../util/mxEventSource.html#setEventsEnabled(boolean)">setEventsEnabled</a>, <a href="../util/mxEventSource.html#setEventSource(java.lang.Object)">setEventSource</a></code></li>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>graph</h4>
<pre>protected&nbsp;<a href="mxGraph.html" title="class in com.mxgraph.view">mxGraph</a> graph</pre>
<div class="block">Reference to the enclosing graph.</div>
</li>
</ul>
<a id="singleSelection">
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<h4>singleSelection</h4>
<pre>protected&nbsp;boolean singleSelection</pre>
<div class="block">Specifies if only one selected item at a time is allowed.
Default is false.</div>
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<a id="cells">
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<h4>cells</h4>
<pre>protected&nbsp;java.util.Set&lt;java.lang.Object&gt; cells</pre>
<div class="block">Holds the selection cells.</div>
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<h4>mxGraphSelectionModel</h4>
<pre>public&nbsp;mxGraphSelectionModel&#8203;(<a href="mxGraph.html" title="class in com.mxgraph.view">mxGraph</a>&nbsp;graph)</pre>
<div class="block">Constructs a new selection model for the specified graph.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>graph</code> - </dd>
</dl>
</li>
</ul>
</li>
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<a id="isSingleSelection()">
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<h4>isSingleSelection</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;isSingleSelection()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the singleSelection</dd>
</dl>
</li>
</ul>
<a id="setSingleSelection(boolean)">
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<h4>setSingleSelection</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;setSingleSelection&#8203;(boolean&nbsp;singleSelection)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>singleSelection</code> - the singleSelection to set</dd>
</dl>
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<a id="isSelected(java.lang.Object)">
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<h4>isSelected</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;isSelected&#8203;(java.lang.Object&nbsp;cell)</pre>
<div class="block">Returns true if the given cell is selected.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>cell</code> - </dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Returns true if the given cell is selected.</dd>
</dl>
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<a id="isEmpty()">
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<h4>isEmpty</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;isEmpty()</pre>
<div class="block">Returns true if no cells are selected.</div>
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<h4>size</h4>
<pre class="methodSignature">public&nbsp;int&nbsp;size()</pre>
<div class="block">Returns the number of selected cells.</div>
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<h4>clear</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;clear()</pre>
<div class="block">Clears the selection.</div>
</li>
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<h4>getCell</h4>
<pre class="methodSignature">public&nbsp;java.lang.Object&nbsp;getCell()</pre>
<div class="block">Returns the first selected cell.</div>
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<h4>getCells</h4>
<pre class="methodSignature">public&nbsp;java.lang.Object[]&nbsp;getCells()</pre>
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<h4>setCell</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;setCell&#8203;(java.lang.Object&nbsp;cell)</pre>
<div class="block">Clears the selection and adds the given cell to the selection.</div>
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<h4>setCells</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;setCells&#8203;(java.lang.Object[]&nbsp;cells)</pre>
<div class="block">Clears the selection and adds the given cells.</div>
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<a id="getFirstSelectableCell(java.lang.Object[])">
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<h4>getFirstSelectableCell</h4>
<pre class="methodSignature">protected&nbsp;java.lang.Object&nbsp;getFirstSelectableCell&#8203;(java.lang.Object[]&nbsp;cells)</pre>
<div class="block">Returns the first selectable cell in the given array of cells.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>cells</code> - Array of cells to return the first selectable cell for.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
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<pre class="methodSignature">public&nbsp;void&nbsp;addCell&#8203;(java.lang.Object&nbsp;cell)</pre>
<div class="block">Adds the given cell to the selection.</div>
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<a id="addCells(java.lang.Object[])">
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<pre class="methodSignature">public&nbsp;void&nbsp;addCells&#8203;(java.lang.Object[]&nbsp;cells)</pre>
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<h4>removeCell</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;removeCell&#8203;(java.lang.Object&nbsp;cell)</pre>
<div class="block">Removes the given cell from the selection.</div>
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<h4>removeCells</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;removeCells&#8203;(java.lang.Object[]&nbsp;cells)</pre>
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<h4>changeSelection</h4>
<pre class="methodSignature">protected&nbsp;void&nbsp;changeSelection&#8203;(java.util.Collection&lt;java.lang.Object&gt;&nbsp;added,
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<pre class="methodSignature">protected&nbsp;void&nbsp;cellAdded&#8203;(java.lang.Object&nbsp;cell)</pre>
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<h4>cellRemoved</h4>
<pre class="methodSignature">protected&nbsp;void&nbsp;cellRemoved&#8203;(java.lang.Object&nbsp;cell)</pre>
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