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<div>
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<h1>Class ChangedEvent</h1>
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<h3>Hierarchy</h3>
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<ul class="tsd-hierarchy">
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<li>
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<span class="target">ChangedEvent</span>
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</li>
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</ul>
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</section>
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<section class="tsd-panel tsd-comment">
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<div class="tsd-comment tsd-typography">
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<p>A ChangedEvent represents a change to an object, typically a <a href="GraphObject.html">GraphObject</a>,
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but also for model data, a <a href="Model.html">Model</a>, or a <a href="Diagram.html">Diagram</a>.
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The most common case is for remembering the name of a property
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and the before-and-after values for that property.</p>
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<p>You can listen for changed events on the model using <a href="Model.html#addChangedListener">Model.addChangedListener</a>
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or <a href="Diagram.html#addModelChangedListener">Diagram.addModelChangedListener</a>, and on the Diagram using <a href="Diagram.html#addChangedListener">Diagram.addChangedListener</a>.</p>
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<p>There are four kinds of changes, represented by enumerated values:
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<a href="ChangedEvent.html#static-Property">ChangedEvent.Property</a> (the most common), <a href="ChangedEvent.html#static-Insert">ChangedEvent.Insert</a> and <a href="ChangedEvent.html#static-Remove">ChangedEvent.Remove</a>
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(to represent inserting or removing objects from collections),
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and <a href="ChangedEvent.html#static-Transaction">ChangedEvent.Transaction</a> (to notify about beginning or ending transactions or undo or redo).</p>
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<p>The most common kind of ChangedEvent is a Property change.
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The name of the property is given by <a href="ChangedEvent.html#propertyName">propertyName</a>.
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The modified object is given by <a href="ChangedEvent.html#object">object</a>.
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Use the <a href="ChangedEvent.html#oldValue">oldValue</a> and <a href="ChangedEvent.html#newValue">newValue</a> properties for the before and after property values.</p>
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<p>For an Insert ChangedEvent, the modified collection (often an Array) is a property value on the <a href="ChangedEvent.html#object">object</a>.
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The <a href="ChangedEvent.html#propertyName">propertyName</a> helps distinguish between different collections on the object.
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Use the <a href="ChangedEvent.html#newValue">newValue</a> property to indicate the value that was inserted.
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Use the <a href="ChangedEvent.html#newParam">newParam</a> property to indicate where or how, such as an array index or dictionary key.</p>
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<p>For a Remove ChangedEvent, the modified collection is a property value on the <a href="ChangedEvent.html#object">object</a>.
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The <a href="ChangedEvent.html#propertyName">propertyName</a> helps distinguish between different collections on the object.
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Use the <a href="ChangedEvent.html#oldValue">oldValue</a> property to indicate the value that was removed.
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Use the <a href="ChangedEvent.html#oldParam">oldParam</a> property to indicate where or how, such as an array index or dictionary key.</p>
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<p>Transaction ChangedEvents are generated by the <a href="UndoManager.html">UndoManager</a>.
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The <a href="ChangedEvent.html#propertyName">propertyName</a> names the nature of the ChangedEvent.
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For the very first transaction, the property name is "StartingFirstTransaction".
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This ChangedEvent precedes a ChangedEvent whose property name is "StartedTransaction",
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which occurs for every top-level transaction.</p>
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<p>When ending a transaction, there is first a ChangedEvent whose name is "ComittingTransaction".
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This is followed by one with either "CommittedTransaction" or "RolledBackTransaction",
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depending on how the transaction is ending.
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The <a href="ChangedEvent.html#oldValue">oldValue</a> provides the transaction name and the <a href="ChangedEvent.html#object">object</a> is the <a href="Transaction.html">Transaction</a> being finished.
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(Note that the Transaction value may be null if no Transaction is available at that time,
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perhaps because there were no changes made during the transaction.)
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That Transaction can be scanned to look for ChangedEvents that you may wish to record in a database,
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all within a single database transaction.</p>
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<p>There are also Transaction ChangedEvents corresponding to "StartingUndo", "FinishedUndo",
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"StartingRedo", and "FinishedRedo".
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The <a href="ChangedEvent.html#object">object</a> property provides the <a href="Transaction.html">Transaction</a> that is about-to-be or just-was undone or redone.</p>
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<p>Non-Transaction ChangedEvents are remembered by the <a href="UndoManager.html">UndoManager</a>, if <a href="UndoManager.html#isEnabled">UndoManager.isEnabled</a>,
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and held in the <a href="UndoManager.html#history">UndoManager.history</a> as <a href="Transaction.html">Transaction</a>s which hold lists of ChangedEvents.
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That is why ChangedEvent implements <a href="ChangedEvent.html#undo">undo</a> and <a href="ChangedEvent.html#redo">redo</a> of the change that it remembers.</p>
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<p>When the ChangedEvent represents a change to a <a href="Model.html">Model</a>, the value of <a href="ChangedEvent.html#model">model</a> is non-null
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and the value of <a href="ChangedEvent.html#diagram">diagram</a> is meaningless.
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If the change is a structural change to the model,
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the value of <a href="ChangedEvent.html#modelChange">modelChange</a> indicates the kind of change.
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Currently defined model changed event names include:</p>
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<ul>
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<li><strong>"nodeDataArray"</strong>, after the model's <a href="Model.html#nodeDataArray">Model.nodeDataArray</a> is replaced, inserted into or removed from
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(setting <a href="Model.html#nodeDataArray">Model.nodeDataArray</a> or calling <a href="Model.html#addNodeData">Model.addNodeData</a> or <a href="Model.html#removeNodeData">Model.removeNodeData</a>)</li>
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<li><strong>"nodeKey"</strong>, after changing a node data's unique key (<a href="Model.html#setKeyForNodeData">Model.setKeyForNodeData</a>)</li>
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<li><strong>"nodeCategory"</strong>, after changing a node data's category (<a href="Model.html#setCategoryForNodeData">Model.setCategoryForNodeData</a>)</li>
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<li><strong>"linkDataArray"</strong>, after the model's <a href="GraphLinksModel.html#linkDataArray">GraphLinksModel.linkDataArray</a> is replaced, inserted into or removed from
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(setting <a href="GraphLinksModel.html#linkDataArray">GraphLinksModel.linkDataArray</a> or calling <a href="GraphLinksModel.html#addLinkData">GraphLinksModel.addLinkData</a>
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or <a href="GraphLinksModel.html#removeLinkData">GraphLinksModel.removeLinkData</a>)</li>
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<li><strong>"linkKey"</strong>, after changing a link data's unique key (<a href="GraphLinksModel.html#setKeyForLinkData">GraphLinksModel.setKeyForLinkData</a>)</li>
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<li><strong>"linkCategory"</strong>, after changing a link data's category (<a href="GraphLinksModel.html#setCategoryForLinkData">GraphLinksModel.setCategoryForLinkData</a>)</li>
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<li><strong>"linkFromKey"</strong>, after changing a link data's "from" node key (<a href="GraphLinksModel.html#setFromKeyForLinkData">GraphLinksModel.setFromKeyForLinkData</a>)</li>
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<li><strong>"linkToKey"</strong>, after changing a link data's "to" node key (<a href="GraphLinksModel.html#setToKeyForLinkData">GraphLinksModel.setToKeyForLinkData</a>)</li>
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<li><strong>"linkFromPortId"</strong>, after changing a link data's "from" port identifier string (<a href="GraphLinksModel.html#setFromPortIdForLinkData">GraphLinksModel.setFromPortIdForLinkData</a>)</li>
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<li><strong>"linkToPortId"</strong>, after changing a link data's "to" port identifier string (<a href="GraphLinksModel.html#setToPortIdForLinkData">GraphLinksModel.setToPortIdForLinkData</a>)</li>
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<li><strong>"linkLabelKeys"</strong>, after replacing, inserting into, or removing from a link data's array of keys to label nodes
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(calling <a href="GraphLinksModel.html#setLabelKeysForLinkData">GraphLinksModel.setLabelKeysForLinkData</a>, <a href="GraphLinksModel.html#addLabelKeyForLinkData">GraphLinksModel.addLabelKeyForLinkData</a>,
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or <a href="GraphLinksModel.html#removeLabelKeyForLinkData">GraphLinksModel.removeLabelKeyForLinkData</a>)</li>
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<li><strong>"nodeGroupKey"</strong>, after changing a node data's key for a containing group data (<a href="GraphLinksModel.html#setGroupKeyForNodeData">GraphLinksModel.setGroupKeyForNodeData</a>)</li>
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<li><strong>"nodeParentKey"</strong>, after changing a node data's "parent" node key (<a href="TreeModel.html#setParentKeyForNodeData">TreeModel.setParentKeyForNodeData</a>)</li>
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<li><strong>"parentLinkCategory"</strong>, after changing a node data's "parent" link's category(<a href="TreeModel.html#setParentLinkCategoryForNodeData">TreeModel.setParentLinkCategoryForNodeData</a>)</li>
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<li>other names are for internal implementation use only, only on Transaction ChangedEvents</li>
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</ul>
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<p>The value of <a href="ChangedEvent.html#propertyName">ChangedEvent.propertyName</a> indicates the actual name of the property that was modified.
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<a href="ChangedEvent.html#modelChange">ChangedEvent.modelChange</a> is a non-empty string only when there is a known structural change to the model,
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not just the setting of some property on some object.</p>
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<p>When the ChangedEvent represents a change to a <a href="Diagram.html">Diagram</a> or a <a href="GraphObject.html">GraphObject</a> within a diagram,
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the value of <a href="ChangedEvent.html#diagram">diagram</a> is non-null and
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the values of <a href="ChangedEvent.html#model">model</a> and <a href="ChangedEvent.html#modelChange">modelChange</a> are meaningless.</p>
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<p>Please note that ChangedEvents can be raised for many different causes.
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You may not be interested in changes to temporary objects -- in that case ignore the ChangedEvent when
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<a href="Model.html#skipsUndoManager">Model.skipsUndoManager</a> or <a href="Diagram.html#skipsUndoManager">Diagram.skipsUndoManager</a> is true.</p>
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</div>
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</section>
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<section class="tsd-panel-group tsd-index-group">
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<h2>Index</h2>
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<section class="tsd-panel tsd-index-panel">
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<div class="tsd-index-content">
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<section class="tsd-index-section ">
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<h3>Constructors</h3>
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<ul class="tsd-index-list">
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<li class="tsd-kind-constructor tsd-parent-kind-class"><a href="ChangedEvent.html#constructor" class="tsd-kind-icon">constructor</a></li>
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</ul>
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</section>
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<section class="tsd-index-section ">
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<h3>Properties</h3>
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<ul class="tsd-index-list">
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<li class="tsd-kind-accessor tsd-parent-kind-class"><a href="ChangedEvent.html#change" class="tsd-kind-icon">change</a></li>
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<li class="tsd-kind-accessor tsd-parent-kind-class"><a href="ChangedEvent.html#diagram" class="tsd-kind-icon">diagram</a></li>
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<li class="tsd-kind-get-signature tsd-parent-kind-class"><a href="ChangedEvent.html#isTransactionFinished" class="tsd-kind-icon">is<wbr>Transaction<wbr>Finished</a></li>
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<li class="tsd-kind-accessor tsd-parent-kind-class"><a href="ChangedEvent.html#model" class="tsd-kind-icon">model</a></li>
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<li class="tsd-kind-accessor tsd-parent-kind-class"><a href="ChangedEvent.html#modelChange" class="tsd-kind-icon">model<wbr>Change</a></li>
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<li class="tsd-kind-accessor tsd-parent-kind-class"><a href="ChangedEvent.html#newParam" class="tsd-kind-icon">new<wbr>Param</a></li>
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<li class="tsd-kind-accessor tsd-parent-kind-class"><a href="ChangedEvent.html#newValue" class="tsd-kind-icon">new<wbr>Value</a></li>
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<li class="tsd-kind-accessor tsd-parent-kind-class"><a href="ChangedEvent.html#object" class="tsd-kind-icon">object</a></li>
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<li class="tsd-kind-accessor tsd-parent-kind-class"><a href="ChangedEvent.html#oldParam" class="tsd-kind-icon">old<wbr>Param</a></li>
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<li class="tsd-kind-accessor tsd-parent-kind-class"><a href="ChangedEvent.html#oldValue" class="tsd-kind-icon">old<wbr>Value</a></li>
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<li class="tsd-kind-accessor tsd-parent-kind-class"><a href="ChangedEvent.html#propertyName" class="tsd-kind-icon">property<wbr>Name</a></li>
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</ul>
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</section>
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<section class="tsd-index-section ">
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<h3>Methods</h3>
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<ul class="tsd-index-list">
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<li class="tsd-kind-method tsd-parent-kind-class"><a href="ChangedEvent.html#canRedo" class="tsd-kind-icon">can<wbr>Redo</a></li>
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<li class="tsd-kind-method tsd-parent-kind-class"><a href="ChangedEvent.html#canUndo" class="tsd-kind-icon">can<wbr>Undo</a></li>
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<li class="tsd-kind-method tsd-parent-kind-class"><a href="ChangedEvent.html#clear" class="tsd-kind-icon">clear</a></li>
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<li class="tsd-kind-method tsd-parent-kind-class"><a href="ChangedEvent.html#copy" class="tsd-kind-icon">copy</a></li>
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<li class="tsd-kind-method tsd-parent-kind-class"><a href="ChangedEvent.html#getParam" class="tsd-kind-icon">get<wbr>Param</a></li>
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<li class="tsd-kind-method tsd-parent-kind-class"><a href="ChangedEvent.html#getValue" class="tsd-kind-icon">get<wbr>Value</a></li>
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<li class="tsd-kind-method tsd-parent-kind-class"><a href="ChangedEvent.html#redo" class="tsd-kind-icon">redo</a></li>
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<li class="tsd-kind-method tsd-parent-kind-class"><a href="ChangedEvent.html#undo" class="tsd-kind-icon">undo</a></li>
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</ul>
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</section>
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<section class="tsd-index-section ">
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<h3>Constants</h3>
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<ul class="tsd-index-list">
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<li class="tsd-kind-constant tsd-parent-kind-class tsd-is-static"><a href="ChangedEvent.html#static-Insert" class="tsd-kind-icon">Insert</a></li>
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<li class="tsd-kind-constant tsd-parent-kind-class tsd-is-static"><a href="ChangedEvent.html#static-Property" class="tsd-kind-icon">Property</a></li>
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<li class="tsd-kind-constant tsd-parent-kind-class tsd-is-static"><a href="ChangedEvent.html#static-Remove" class="tsd-kind-icon">Remove</a></li>
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<li class="tsd-kind-constant tsd-parent-kind-class tsd-is-static"><a href="ChangedEvent.html#static-Transaction" class="tsd-kind-icon">Transaction</a></li>
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</ul>
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</section>
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</div>
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</section>
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</section>
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<section class="tsd-panel-group tsd-member-group ">
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<h2>Constructors</h2>
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<section class="tsd-panel tsd-member tsd-kind-constructor tsd-parent-kind-class">
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<a name="constructor" class="tsd-anchor"></a>
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<h3>
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constructor
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</h3>
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<ul class="tsd-signatures tsd-kind-constructor tsd-parent-kind-class">
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<li class="tsd-signature tsd-kind-icon">new <wbr>Changed<wbr>Event<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="ChangedEvent.html" class="tsd-signature-type">ChangedEvent</a></li>
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</ul>
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<ul class="tsd-descriptions">
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<li class="tsd-description">
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<div class="tsd-comment tsd-typography">
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<p>The ChangedEvent class constructor produces an empty ChangedEvent object.</p>
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</div>
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<h4 class="tsd-returns-title">Returns <a href="ChangedEvent.html" class="tsd-signature-type">ChangedEvent</a></h4>
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</li>
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</ul>
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</section>
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</section>
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<section class="tsd-panel-group tsd-member-group ">
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<h2>Properties</h2>
|
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<section class="tsd-panel tsd-member tsd-kind-accessor tsd-parent-kind-class">
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<a name="change" class="tsd-anchor"></a>
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<h3>
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change
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<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">EnumValue</span> </h3>
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<ul class="tsd-descriptions">
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<li class="tsd-description">
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<div class="tsd-comment tsd-typography">
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<p>Gets or sets the nature of change that occurred.
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The default is <a href="ChangedEvent.html#static-Property">ChangedEvent.Property</a>.
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Other values are <a href="ChangedEvent.html#static-Insert">ChangedEvent.Insert</a>, <a href="ChangedEvent.html#static-Remove">ChangedEvent.Remove</a>,
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and <a href="ChangedEvent.html#static-Transaction">ChangedEvent.Transaction</a>.</p>
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</div>
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</li>
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</ul>
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</section>
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<section class="tsd-panel tsd-member tsd-kind-accessor tsd-parent-kind-class">
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<a name="diagram" class="tsd-anchor"></a>
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<h3>
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diagram
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<span class="tsd-signature-symbol">: </span><a href="Diagram.html" class="tsd-signature-type">Diagram</a><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">null</span> </h3>
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<ul class="tsd-descriptions">
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<li class="tsd-description">
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<div class="tsd-comment tsd-typography">
|
|
<p>Gets or sets the <a href="Diagram.html">Diagram</a> that was modified.
|
|
When this property is non-null, the <a href="ChangedEvent.html#model">model</a> property will be null.
|
|
However this property and the <a href="ChangedEvent.html#model">model</a> property may both be null simultaneously,
|
|
when no particular model or diagram applies.</p>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-get-signature tsd-parent-kind-class">
|
|
<a name="isTransactionFinished" class="tsd-anchor"></a>
|
|
<h3>
|
|
<span class="tsd-flag ts-flagReadOnly">Read-only</span>
|
|
is<wbr>Transaction<wbr>Finished
|
|
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span> </h3>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>This read-only property is true when this ChangedEvent is of type <a href="ChangedEvent.html#static-Transaction">ChangedEvent.Transaction</a> and represents the end of a transactional change.
|
|
It is implemented as:</p>
|
|
<pre><code class="hljs js"><span class="hljs-keyword">return</span> (<span class="hljs-keyword">this</span>.change === ChangedEvent.Transaction &&
|
|
(<span class="hljs-keyword">this</span>.propertyName === <span class="hljs-string">"CommittedTransaction"</span> ||
|
|
<span class="hljs-keyword">this</span>.propertyName === <span class="hljs-string">"FinishedUndo"</span> ||
|
|
<span class="hljs-keyword">this</span>.propertyName === <span class="hljs-string">"FinishedRedo"</span>));</code></pre>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-accessor tsd-parent-kind-class">
|
|
<a name="model" class="tsd-anchor"></a>
|
|
<h3>
|
|
model
|
|
<span class="tsd-signature-symbol">: </span><a href="Model.html" class="tsd-signature-type">Model</a><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">null</span> </h3>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Gets or sets the <a href="Model.html">Model</a> or <a href="TreeModel.html">TreeModel</a> or <a href="GraphLinksModel.html">GraphLinksModel</a> that was modified.
|
|
When this property is non-null, the <a href="ChangedEvent.html#diagram">diagram</a> property will be null.
|
|
However this property and the <a href="ChangedEvent.html#diagram">diagram</a> property may both be null simultaneously,
|
|
when no particular model or diagram applies.</p>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-accessor tsd-parent-kind-class">
|
|
<a name="modelChange" class="tsd-anchor"></a>
|
|
<h3>
|
|
model<wbr>Change
|
|
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">string</span> </h3>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Gets or sets the name of the model change, reflecting a change to
|
|
model data in addition to a change to the model itself.</p>
|
|
<p>The default is an empty string, which indicates that this is just
|
|
a regular change to some object's state, probably its property.
|
|
For a list of possible model change names, see the documentation for <a href="ChangedEvent.html">ChangedEvent</a>.
|
|
The names are compared in a case-sensitive manner.</p>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-accessor tsd-parent-kind-class">
|
|
<a name="newParam" class="tsd-anchor"></a>
|
|
<h3>
|
|
new<wbr>Param
|
|
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span> </h3>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Gets or sets an optional value associated with the new value.
|
|
Most properties do not require any parameter to describe the change.
|
|
This is typically a value that helps distinguish the new value, such as an index into an array.
|
|
It is null if it is not used.
|
|
The default is null.</p>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-accessor tsd-parent-kind-class">
|
|
<a name="newValue" class="tsd-anchor"></a>
|
|
<h3>
|
|
new<wbr>Value
|
|
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span> </h3>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Gets or sets the next or current value that the property has.
|
|
The default is null.</p>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-accessor tsd-parent-kind-class">
|
|
<a name="object" class="tsd-anchor"></a>
|
|
<h3>
|
|
object
|
|
<span class="tsd-signature-symbol">: </span><a href="ObjectData.html" class="tsd-signature-type">ObjectData</a><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">null</span> </h3>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Gets or sets the Object that was modified.
|
|
The default is null.</p>
|
|
<p>For <a href="ChangedEvent.html#static-Transaction">ChangedEvent.Transaction</a> changes, this may be the <a href="Transaction.html">Transaction</a>.</p>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-accessor tsd-parent-kind-class">
|
|
<a name="oldParam" class="tsd-anchor"></a>
|
|
<h3>
|
|
old<wbr>Param
|
|
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span> </h3>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Gets or sets an optional value associated with the old value.
|
|
Most properties do not require any parameter to describe the change.
|
|
This is typically a value that helps distinguish the old value, such as an index into an array.
|
|
It is null if it is not used.
|
|
The default is null.</p>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-accessor tsd-parent-kind-class">
|
|
<a name="oldValue" class="tsd-anchor"></a>
|
|
<h3>
|
|
old<wbr>Value
|
|
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span> </h3>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Gets or sets the previous or old value that the property had.
|
|
The default is null.</p>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-accessor tsd-parent-kind-class">
|
|
<a name="propertyName" class="tsd-anchor"></a>
|
|
<h3>
|
|
property<wbr>Name
|
|
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">function</span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">a</span><span class="tsd-signature-symbol">: </span><a href="ObjectData.html" class="tsd-signature-type">ObjectData</a><span class="tsd-signature-symbol">, </span><span class="tsd-signature-symbol">b</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span> </h3>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Gets or sets the name of the property change.
|
|
The default is an empty string, which is not a valid property name.
|
|
This property can be useful even when the type of change is
|
|
not <a href="ChangedEvent.html#static-Property">ChangedEvent.Property</a>, because it can help identify
|
|
the collection in the <a href="ChangedEvent.html#object">object</a> that was modified
|
|
(for <a href="ChangedEvent.html#static-Insert">ChangedEvent.Insert</a> or <a href="ChangedEvent.html#static-Remove">ChangedEvent.Remove</a>)
|
|
or the stage of the current transaction (for <a href="ChangedEvent.html#static-Transaction">ChangedEvent.Transaction</a>).</p>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
</section>
|
|
<section class="tsd-panel-group tsd-member-group ">
|
|
<h2>Methods</h2>
|
|
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
|
|
<a name="canRedo" class="tsd-anchor"></a>
|
|
<h3>
|
|
can<wbr>Redo
|
|
</h3>
|
|
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
|
|
<li class="tsd-signature tsd-kind-icon">can<wbr>Redo<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span></li>
|
|
</ul>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>This predicate returns true if you can call redo().</p>
|
|
</div>
|
|
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</span></h4>
|
|
<p>True if ready for redo() to be called.</p>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
|
|
<a name="canUndo" class="tsd-anchor"></a>
|
|
<h3>
|
|
can<wbr>Undo
|
|
</h3>
|
|
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
|
|
<li class="tsd-signature tsd-kind-icon">can<wbr>Undo<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span></li>
|
|
</ul>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>This predicate returns true if you can call undo().</p>
|
|
</div>
|
|
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</span></h4>
|
|
<p>True if ready for undo() to be called.</p>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
|
|
<a name="clear" class="tsd-anchor"></a>
|
|
<h3>
|
|
clear
|
|
</h3>
|
|
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
|
|
<li class="tsd-signature tsd-kind-icon">clear<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
|
|
</ul>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Forget any object references that this ChangedEvent may have.</p>
|
|
</div>
|
|
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
|
|
<a name="copy" class="tsd-anchor"></a>
|
|
<h3>
|
|
copy
|
|
</h3>
|
|
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
|
|
<li class="tsd-signature tsd-kind-icon">copy<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="ChangedEvent.html" class="tsd-signature-type">ChangedEvent</a></li>
|
|
</ul>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Make a copy of this ChangedEvent.
|
|
ChangedEvents are copied when the <a href="UndoManager.html">UndoManager</a> adds to a <a href="Transaction.html">Transaction</a>.</p>
|
|
</div>
|
|
<h4 class="tsd-returns-title">Returns <a href="ChangedEvent.html" class="tsd-signature-type">ChangedEvent</a></h4>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
|
|
<a name="getParam" class="tsd-anchor"></a>
|
|
<h3>
|
|
get<wbr>Param
|
|
</h3>
|
|
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
|
|
<li class="tsd-signature tsd-kind-icon">get<wbr>Param<span class="tsd-signature-symbol">(</span>undo<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span></li>
|
|
</ul>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>This is a convenient method to get the right parameter value, depending on the value of undo,
|
|
when implementing a state change as part of an undo or a redo.</p>
|
|
</div>
|
|
<h4 class="tsd-parameters-title">Parameters</h4>
|
|
<ul class="tsd-parameters">
|
|
<li>
|
|
<h5>undo: <span class="tsd-signature-type">boolean</span></h5>
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>If true, returns the oldParam, otherwise returns the newParam.</p>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">any</span></h4>
|
|
<p>Either the oldParam or the newParam.</p>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
|
|
<a name="getValue" class="tsd-anchor"></a>
|
|
<h3>
|
|
get<wbr>Value
|
|
</h3>
|
|
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
|
|
<li class="tsd-signature tsd-kind-icon">get<wbr>Value<span class="tsd-signature-symbol">(</span>undo<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span></li>
|
|
</ul>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>This is a convenient method to get the right value, depending on the value of undo,
|
|
when implementing a state change as part of an undo or a redo.</p>
|
|
</div>
|
|
<h4 class="tsd-parameters-title">Parameters</h4>
|
|
<ul class="tsd-parameters">
|
|
<li>
|
|
<h5>undo: <span class="tsd-signature-type">boolean</span></h5>
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>If true, returns the oldValue, otherwise returns the newValue.</p>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">any</span></h4>
|
|
<p>Either the oldValue or the newValue.</p>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
|
|
<a name="redo" class="tsd-anchor"></a>
|
|
<h3>
|
|
redo
|
|
</h3>
|
|
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
|
|
<li class="tsd-signature tsd-kind-icon">redo<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
|
|
</ul>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Re-perform this object change after an undo().
|
|
canRedo() must be true for this method to have any effect.</p>
|
|
</div>
|
|
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
|
|
<a name="undo" class="tsd-anchor"></a>
|
|
<h3>
|
|
undo
|
|
</h3>
|
|
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
|
|
<li class="tsd-signature tsd-kind-icon">undo<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
|
|
</ul>
|
|
<ul class="tsd-descriptions">
|
|
<li class="tsd-description">
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>Reverse the effects of this object change.
|
|
canUndo() must be true for this method to have any effect.</p>
|
|
</div>
|
|
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4>
|
|
</li>
|
|
</ul>
|
|
</section>
|
|
</section>
|
|
<section class="tsd-panel-group tsd-member-group ">
|
|
<h2>Constants</h2>
|
|
<section class="tsd-panel tsd-member tsd-kind-constant tsd-parent-kind-class tsd-is-static">
|
|
<a name="static-Insert" class="tsd-anchor"></a>
|
|
<h3>
|
|
<span class="tsd-flag ts-flagStatic">Static</span>
|
|
Insert
|
|
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">EnumValue</span> </h3>
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>For inserting into collections,
|
|
and used as the value for <a href="ChangedEvent.html#change">ChangedEvent.change</a>.
|
|
The modified object is given by <a href="ChangedEvent.html#object">ChangedEvent.object</a>.
|
|
Use the optional <a href="ChangedEvent.html#propertyName">ChangedEvent.propertyName</a> to distinguish between different collections on the object.
|
|
Use the <a href="ChangedEvent.html#newValue">ChangedEvent.newValue</a> property to indicate the value that was inserted.
|
|
Use the optional <a href="ChangedEvent.html#newParam">ChangedEvent.newParam</a> property to indicate where or how, such as an array index or dictionary key.</p>
|
|
</div>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-constant tsd-parent-kind-class tsd-is-static">
|
|
<a name="static-Property" class="tsd-anchor"></a>
|
|
<h3>
|
|
<span class="tsd-flag ts-flagStatic">Static</span>
|
|
Property
|
|
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">EnumValue</span> </h3>
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>For simple property changes,
|
|
and used as the value for <a href="ChangedEvent.html#change">ChangedEvent.change</a>.
|
|
The name of the property is given by <a href="ChangedEvent.html#propertyName">ChangedEvent.propertyName</a>.
|
|
The modified object is given by <a href="ChangedEvent.html#object">ChangedEvent.object</a>.
|
|
Use the <a href="ChangedEvent.html#oldValue">ChangedEvent.oldValue</a> and <a href="ChangedEvent.html#newValue">ChangedEvent.newValue</a> properties for the previous and next property values.</p>
|
|
<p>For model changes, the <a href="ChangedEvent.html#modelChange">ChangedEvent.modelChange</a> may be non-empty, indicating a structural change to the model.</p>
|
|
</div>
|
|
</section>
|
|
<section class="tsd-panel tsd-member tsd-kind-constant tsd-parent-kind-class tsd-is-static">
|
|
<a name="static-Remove" class="tsd-anchor"></a>
|
|
<h3>
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<span class="tsd-flag ts-flagStatic">Static</span>
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Remove
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<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">EnumValue</span> </h3>
|
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<div class="tsd-comment tsd-typography">
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<p>For removing from collections,
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|
and used as the value for <a href="ChangedEvent.html#change">ChangedEvent.change</a>.
|
|
The modified object is given by <a href="ChangedEvent.html#object">ChangedEvent.object</a>.
|
|
Use the optional <a href="ChangedEvent.html#propertyName">ChangedEvent.propertyName</a> to distinguish between different collections on the object.
|
|
Use the <a href="ChangedEvent.html#oldValue">ChangedEvent.oldValue</a> property to indicate the value that was removed.
|
|
Use the optional <a href="ChangedEvent.html#oldParam">ChangedEvent.oldParam</a> property to indicate where or how, such as an array index or dictionary key.</p>
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</div>
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</section>
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<section class="tsd-panel tsd-member tsd-kind-constant tsd-parent-kind-class tsd-is-static">
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<a name="static-Transaction" class="tsd-anchor"></a>
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<h3>
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<span class="tsd-flag ts-flagStatic">Static</span>
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Transaction
|
|
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">EnumValue</span> </h3>
|
|
<div class="tsd-comment tsd-typography">
|
|
<p>For informational events, such as transactions and undo/redo operations,
|
|
and used as the value for <a href="ChangedEvent.html#change">ChangedEvent.change</a>.
|
|
The <a href="ChangedEvent.html#object">ChangedEvent.object</a> refers to the <a href="Transaction.html">Transaction</a> affected, if any.
|
|
The <a href="ChangedEvent.html#propertyName">ChangedEvent.propertyName</a> distinguishes the different transaction or undo or redo stages.
|
|
The <a href="ChangedEvent.html#oldValue">ChangedEvent.oldValue</a> may provide the transaction name, if available, as given to <a href="UndoManager.html#commitTransaction">UndoManager.commitTransaction</a>.</p>
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</div>
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</section>
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</section>
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</div>
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<div class="col-4 col-menu menu-sticky-wrap menu-highlight">
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<nav class="tsd-navigation primary">
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<ul>
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<li class="globals ">
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<a href="../index.html"><em>GoJS <wbr>Class <wbr>Index</em></a>
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</li>
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</ul>
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</nav>
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<nav class="tsd-navigation secondary menu-sticky">
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<ul class="before-current">
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</ul>
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<ul class="current">
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<li class="current tsd-kind-class">
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<a href="ChangedEvent.html" class="tsd-kind-icon">Changed<wbr>Event</a>
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<ul>
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<li class=" tsd-kind-constructor tsd-parent-kind-class">
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<a href="ChangedEvent.html#constructor" class="tsd-kind-icon">constructor</a>
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</li>
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<li class=" tsd-kind-accessor tsd-parent-kind-class">
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<a href="ChangedEvent.html#change" class="tsd-kind-icon">change</a>
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</li>
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<li class=" tsd-kind-accessor tsd-parent-kind-class">
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<a href="ChangedEvent.html#diagram" class="tsd-kind-icon">diagram</a>
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</li>
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<li class=" tsd-kind-get-signature tsd-parent-kind-class">
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<a href="ChangedEvent.html#isTransactionFinished" class="tsd-kind-icon">is<wbr>Transaction<wbr>Finished</a>
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</li>
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|
<li class=" tsd-kind-accessor tsd-parent-kind-class">
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|
<a href="ChangedEvent.html#model" class="tsd-kind-icon">model</a>
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</li>
|
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<li class=" tsd-kind-accessor tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#modelChange" class="tsd-kind-icon">model<wbr>Change</a>
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</li>
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<li class=" tsd-kind-accessor tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#newParam" class="tsd-kind-icon">new<wbr>Param</a>
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|
</li>
|
|
<li class=" tsd-kind-accessor tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#newValue" class="tsd-kind-icon">new<wbr>Value</a>
|
|
</li>
|
|
<li class=" tsd-kind-accessor tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#object" class="tsd-kind-icon">object</a>
|
|
</li>
|
|
<li class=" tsd-kind-accessor tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#oldParam" class="tsd-kind-icon">old<wbr>Param</a>
|
|
</li>
|
|
<li class=" tsd-kind-accessor tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#oldValue" class="tsd-kind-icon">old<wbr>Value</a>
|
|
</li>
|
|
<li class=" tsd-kind-accessor tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#propertyName" class="tsd-kind-icon">property<wbr>Name</a>
|
|
</li>
|
|
<li class=" tsd-kind-method tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#canRedo" class="tsd-kind-icon">can<wbr>Redo</a>
|
|
</li>
|
|
<li class=" tsd-kind-method tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#canUndo" class="tsd-kind-icon">can<wbr>Undo</a>
|
|
</li>
|
|
<li class=" tsd-kind-method tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#clear" class="tsd-kind-icon">clear</a>
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|
</li>
|
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<li class=" tsd-kind-method tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#copy" class="tsd-kind-icon">copy</a>
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</li>
|
|
<li class=" tsd-kind-method tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#getParam" class="tsd-kind-icon">get<wbr>Param</a>
|
|
</li>
|
|
<li class=" tsd-kind-method tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#getValue" class="tsd-kind-icon">get<wbr>Value</a>
|
|
</li>
|
|
<li class=" tsd-kind-method tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#redo" class="tsd-kind-icon">redo</a>
|
|
</li>
|
|
<li class=" tsd-kind-method tsd-parent-kind-class">
|
|
<a href="ChangedEvent.html#undo" class="tsd-kind-icon">undo</a>
|
|
</li>
|
|
<li class=" tsd-kind-constant tsd-parent-kind-class tsd-is-static">
|
|
<a href="ChangedEvent.html#static-Insert" class="tsd-kind-icon">Insert</a>
|
|
</li>
|
|
<li class=" tsd-kind-constant tsd-parent-kind-class tsd-is-static">
|
|
<a href="ChangedEvent.html#static-Property" class="tsd-kind-icon">Property</a>
|
|
</li>
|
|
<li class=" tsd-kind-constant tsd-parent-kind-class tsd-is-static">
|
|
<a href="ChangedEvent.html#static-Remove" class="tsd-kind-icon">Remove</a>
|
|
</li>
|
|
<li class=" tsd-kind-constant tsd-parent-kind-class tsd-is-static">
|
|
<a href="ChangedEvent.html#static-Transaction" class="tsd-kind-icon">Transaction</a>
|
|
</li>
|
|
</ul>
|
|
</li>
|
|
</ul>
|
|
<ul class="after-current">
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</ul>
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