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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no, viewport-fit=cover"/>
<meta name="description" content="GoJS Change Log"/><link rel="stylesheet" href="./assets/css/style.css"/>
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<h1 class="mb-0 p-1 ">GoJS</h1>
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<h1>GoJS Change Log</h1>
<p id="ver"></p>
<p>
We maintain a <a href="https://github.com/NorthwoodsSoftware/GoJS">GitHub Repository</a>,
which you can star to follow version updates.
We also notify of changes on <a href="https://twitter.com/NorthwoodsGo">Twitter</a>.
</p>
<hr>
<h2 id="2.1">GoJS 2.1</h2>
<h3>New Animation Capabilities</h3>
<p>GoJS 2.1 contains a number of new features to animate different components of your Diagram.</p>
<p>
See the <a href="intro/animation.html" target="_blank">Intro page on Animation</a>
and the <a href="samples/customAnimations.html" target="_blank">Custom Animation sample</a> for more details and examples.
</p>
<ul>
<li>
New default GoJS animation "fades up", instead of animating Node locations. Added <a>AnimationManager.initialAnimationStyle</a>
to control this behavior.
Here is an example of:
<ul>
<li>
(top) The new initial animation, the Diagram position animating upwards and Diagram opacity animating
from 0 to 1.
<li>
(middle) A custom "zoom in" animation, animating Diagram scale, which is demonstrated in
the new <a href="samples/stateChart.html" target="_blank">State Chart</a> sample,
<li>
(bottom) <a>AnimationManager.initialAnimationStyle</a> set to <a>AnimationManager.AnimateLocations</a> to
perform the GoJS 2.0 and previous style of animation.
The <a href="samples/dataVisualization.html" target="_blank">Data Visualization</a> sample uses this
option.
</ul>
</li>
<li>
Added <code>"InitialAnimationStarting"</code> <a>DiagramEvent</a> to more easily customize initial animations.
See <a>AnimationManager.initialAnimationStyle</a> for details.
</li>
<li>
New class: <a>AnimationTrigger</a>. These describe how to automatically animate a property on a GraphObject
when it changes value.
</li>
<li>
New class: <a>Animation</a>. This class lets you declaratively setup custom animations, with options for
indefinite animations.
</li>
<li>
New <a>AnimationManager</a> options, including the ability to define custom animation effects to animate with
<a>AnimationManager,defineAnimationEffect</a>
</li>
<li>
New Animation samples and samples modified to use new Animation features:
<ul>
<li>
<a href="samples/customAnimations.html" target="_blank">Custom Animation</a> - <strong>New Sample:</strong>
Demonstrating a number of Node creation/deletion animations, linking animations, and more.
</li>
<li>
<a href="samples/treeLoadAnimation.html" target="_blank">Tree Load Animation</a> - <strong>New Sample:</strong>
recursive animation upon model load.
</li>
<li>
<a href="samples/flowchart.html" target="_blank">Flowchart</a> - In the Palette only, initial animation
is disabled in favor of a custom fade-in animation.
</li>
<li>
<a href="samples/stateChart.html" target="_blank">State Chart</a> - Initial animation is disabled in
favor of a custom zoom fade-in animation.
</li>
<li>
<a href="samples/dataVisualization.html" target="_blank">Data Visualization</a> - Nodes now move using an
<a>AnimationTrigger</a>.
</li>
<li><a href="samples/kittenMonitor.html" target="_blank">Kitten Monitor</a> - Kittens now move using an <a>AnimationTrigger</a>.</li>
<li>
<a href="samples/processFlow.html" target="_blank">Process Flow</a> - An indefinite Animation of the
Links' strokeDashArray.
</li>
<li>
<a href="samples/shopFloorMonitor.html" target="_blank">Shop Floor Monitor</a> - Link color changes now
use an <a>AnimationTrigger</a>.
</li>
</ul>
</li>
</ul>
<h3>Improved Support For Data Synchronization</h3>
<p>
GoJS 2.1 contains some new methods to ease integration of GoJS diagrams in applications that maintain their own
data, particularly React apps.
</p>
<p>
See the <a href="intro/react.html" target="_blank">Intro page on using GoJS with React</a> and
the <a href="https://github.com/NorthwoodsSoftware/gojs-react-basic" target="_blank">gojs-react example project</a> for details and examples.
Also see <a href="https://github.com/NorthwoodsSoftware/gojs-react" target="_blank">gojs-react</a>, a package
containing React Components for GoJS Diagrams, Palettes, and Overviews.
</p>
<ul>
<li>
New method: <a>Model.toIncrementalData</a>. This method outputs an <a>IncrementalData</a> object containing
changes that occurred within a <a>Transaction</a>,
similar to the existing method, <a>Model.toIncrementalJson</a>. It can be used to keep outside data
synchronized with the GoJS model.
</li>
<li>
New methods: <a>Model.mergeNodeDataArray</a> and <a>GraphLinksModel.mergeLinkDataArray</a>. These methods are
used to merge outside data changes into the GoJS model.
</li>
<li>
New method: <a>Model.cloneDeep</a>. This method can be used to make a deep copy of an object, which may be
useful to ensure GoJS doesn't share references with outside state.
It is also used within <a>Model.toIncrementalData</a> to ensure <a>IncrementalData</a>'s list of modified
objects won't contain references to the model's data objects, if the external data is required to be immutable.
</li>
</ul>
<hr />
<h4 id="2.1.48">Changes for 2.1.48</h4>
<ul>
<li>
Fixed <a>Panel.removeRowDefinition</a> and <a>Panel.removeColumnDefinition</a>
to decrease the <a>Panel.rowCount</a> and <a>Panel.columnCount</a>
when the highest index <a>RowColumnDefinition</a> is removed.
</li>
<li>
Fixed <a>Picture.successFunction</a>, which was called for only the first Picture with a given unique <a>Picture.source</a>.
It is now called for every Picture that has a <code>successFunction</code> defined with the same (successfully loaded) source.
</li>
</ul>
<h4 id="2.1.47">Changes for 2.1.47</h4>
<ul>
<li>
Fixed <a>Diagram.layoutDiagram</a> not performing a layout immediately if called within an ongoing Diagram update
(such as during a <a>DiagramEvent</a> like <code>"InitialLayoutCompleted"</code>).
</li>
<li>
Fixed <a>Panel.itemTemplate</a> so that it is used, not the default item template, when the panel cannot find any
template with the given category name in the item data.
</li>
<li>
<a>Diagram.viewSize</a>, if set, now takes precedence over the size of the <a>Diagram.div</a>.
It is not typical to set both a DIV and the <code>viewSize</code>, but in environments where a DIV is set automatically
it may be useful for testing purposes to set an explicit <code>viewSize</code> as well.
</li>
</ul>
<h4 id="2.1.46">Changes for 2.1.46</h4>
<ul>
<li>
Fixed indefinite animations causing some transactions to skip the <a>UndoManager</a>.
</li>
<li>
Fixed <a>Diagram.makeImageData</a> to draw any other Parts in the "Grid" Layer besides the Part holding the <a>Diagram.grid</a>
when the <code>showGrid</code> option is true but the <code>showTemporary</code> option is false.
</li>
</ul>
<h4 id="2.1.45">Changes for 2.1.45</h4>
<ul>
<li>
Fixed a bounds calculation bug with <a>PathSegment,SvgArc</a>s, when the arc has a zero X or Y radius value.
</li>
<li>
Link route calculations now avoid an effectively infinite loop due to floating point errors when the two ports almost exactly overlap each other.
</li>
<li>
Fixed an occasional exception when dragging a disconnected link when the link had no points in its route.
</li>
<li>
The <a>GraphObject.naturalBounds</a> of a <a>Shape</a> now always prefers <a>GraphObject.desiredSize</a> if it exists, over the Shape's <a>Geometry.bounds</a>.
These are usually the same, but a Geometry with beziers can be slightly off from the desiredSize used to create it.
</li>
</ul>
<h4 id="2.1.44">Changes for 2.1.44</h4>
<ul>
<li>
Fixed a regression from 2.1.28 with some <a>Shape.geometryString</a> paths.
If a path contained an arc command that was closed, a relative move command afterwards would be at
the wrong coordinates.
</li>
</ul>
<h4 id="2.1.43">Changes for 2.1.43</h4>
<ul>
<li>
Improved performance of <a>LayeredDigraphLayout</a> for large graphs when <a>LayeredDigraphLayout.packOption</a>
is set to <a>LayeredDigraphLayout,PackAll</a>.
Setting <a>LayeredDigraphLayout.packOption</a> to a subset of the possible flags has always helped performance at the expense of improved layout.
Also, it has always helped to set <a>LayeredDigraphLayout.aggressiveOption</a> to <a>LayeredDigraphLayout,AggressiveNone</a>.
</li>
<li>
Fixed non-default indefinite animations preventing the default animation from starting. Fixed some other non-default animation bugs, such as indefinite animations preventing Overviews from updating.
</li>
<li>
Enhanced <a>LinkingTool.findLinkablePort</a>, when <a>LinkingTool.startObject</a> is a Node and the whole node is not a port,
to return the node's default port <a>Node.port</a> instead of null, if the port is a valid port for linking from or to.
</li>
</ul>
<h4 id="2.1.42">Changes for 2.1.42</h4>
<ul>
<li>
Fixed an animation bug with <a>ResizingTool</a> where it would disable all animations on resizing.
</li>
<li>
Setting <a>AnimationManager.isEnabled</a> to false and then true again will resume any indefinite animations (animations with <a>Animation.runCount</a> set to <code>Infinity</code>).
</li>
<li>
Fixed a bug in RadialLayout where it wasn't properly resetting its network. This was most often seen when using with
<a>Diagram.delayInitialization</a> (including gojs-react and gojs-angular).
</li>
</ul>
<h4 id="2.1.41">Changes for 2.1.41</h4>
<ul>
<li>
Improved the animation of colors in <a>Animation</a>s.
</li>
<li>
Added the <a href="extensions/SpotRotatingTool.js" target="_blank">Spot Rotating Tool</a> extension,
demonstrated in the <a href="extensions/SpotRotating.html" target="_blank">Spot Rotating</a> sample.
This is basically the <a>RotatingTool</a> extended to support an additional Adornment and handle for
letting the user interactively move the <a>RotatingTool.rotationPoint</a> by setting
<a>Part.rotationSpot</a>.
</li>
<li>Added an Introduction page about <a href="intro/platforms.html">Using GoJS on Different Platforms</a>, summarizing existing resources for them.</li>
</ul>
<h4 id="2.1.40">Changes for 2.1.40</h4>
<ul>
<li>
Fixed some styling and missing files in the web site as a result of the reorganization in 2.1.39.
</li>
<li>
Simplified the Storage and FloorplannerTS projects.
</li>
</ul>
<h4 id="2.1.39">Changes for 2.1.39</h4>
<ul>
<li>
Reorganized GoJS kit and site. <code>gojs</code> package no longer contains jQuery, and samples that reference jQuery use a CDN.
</li>
<li>
Fixed a bug when animating the position of GraphObjects inside a Position Panel.
</li>
</ul>
<h4 id="2.1.38">Changes for 2.1.38</h4>
<ul>
<li>
Table panel fixes with stretch elements, this includes a regression fix from 2.1.35.
</li>
<li>
Fixed a regression (for IE11 only) from 2.1.37, which broke mouse events.
</li>
</ul>
<h4 id="2.1.37">Changes for 2.1.37</h4>
<ul>
<li>
Added an Introduction page about <a href="intro/testing.html">Testing</a> with Jest and with Cypress.
</li>
<li>
Fixed some scenarios with Table Panels not apportioning space correctly when elements stretched
and rows/columns had minimums or maximums set.
</li>
<li>
Fixed touch-dragging between Diagrams in frameworks that use a shadow DOM (like Angular).
</li>
<li>
Fixed routing invalidation of links to nodes in collapsed groups that have "...Sides" Spots.
</li>
<li>
Fixed shadows on unfilled <a>PathFigures</a> when a <a>GraphObject.fill</a> was set. This mostly presented itself when shadowing bezier or orthogonal Link paths.
This fix may cause Links with a Link Label to draw a shadow on the Link path where none was previously. If you do not want the Link path shaded, you must set
<a>GraphObject.shadowVisible</a> to <code>false</code> on the Link path Shape.
</li>
</ul>
<h4 id="2.1.36">Changes for 2.1.36</h4>
<ul>
<li>
Fixed "Graduated" Panels rendering of final tick mark in some cases where due to floating point errors
the tick mark was not drawn.
</li>
<li>
Fixed <a>Link.getLinkPointFromPoint</a> for some cases where the start point was inside the target port shape.
</li>
<li>
One can now avoid invalidating the routes of other links that connect the same pair of ports
when links between them are added or removed, by setting <a>Link.curviness</a> to a number such as zero.
</li>
</ul>
<h4 id="2.1.35">Changes for 2.1.35</h4>
<ul>
<li>
Fixed jitter that occurred when dragging between diagrams with a modifier key held down.
</li>
<li>
When dragging between diagrams, fixed the loss of routing of partly or fully disconnected reshaped links
that have TwoWay Bindings on "points", and fixed the positioning of multiple fully disconnected links.
</li>
<li>
Fixed a shadow-drawing bug that could occur when <a>Part.isShadowed</a> is false but <a>GraphObject.shadowVisible</a> is true.
</li>
</ul>
<h4 id="2.1.34">Changes for 2.1.34</h4>
<ul>
<li>
Improved performance for off-screen Adornments and Parts.
</li>
<li>
Fixed exception regarding Workers when running in a web Worker.
</li>
</ul>
<h4 id="2.1.33">Changes for 2.1.33</h4>
<ul>
<li>
Improved AvoidsNodes routing performance for many common cases.
</li>
<li>
Improved <a>ContextMenuTool.canStart</a> to return false for double or triple context clicks.
</li>
</ul>
<h4 id="2.1.32">Changes for 2.1.32</h4>
<ul>
<li>
Fixed auto-scrolling not to do so in the directions in which <a>Diagram.allowHorizontalScroll</a> and
<a>Diagram.allowVerticalScroll</a> disallow it.
</li>
<li>
Fixed the positioning of nodes and links when an animation is stopped during a drag that operates on the same Parts.
</li>
<li>
Fixed <a>Diagram.makeSvg</a> where the SVG would not include <a>Picture.source</a> in headless browsers.
</li>
<li>
Fixed Diagram initialization when no Diagram DIV is specified, but setting some properties expected one (such as <a>Diagram.scrollMargin</a>).
</li>
</ul>
<h4 id="2.1.31">Changes for 2.1.31</h4>
<ul>
<li>
Fixed a regression since 2.1.30 where the library might not load in React or Angular environments, and a TypeError would be thrown.
</li>
<li>
Fixed dragging of links connected with snapped nodes when the grid cell size was not an integer,
causing the links to slowly shift over time.
</li>
<li>
Fixed rendering of background in images drawn by <a>Diagram.makeImageData</a> when the whole page has been scaled to be less than 100%.
</li>
<li>
Fixed <a>Diagram.delayInitialization</a> when calling code that prompts the Diagram to update immediately afterwards.
</li>
<li>
Fixed premature routing of links in Groups that start off collapsed (with <a>Group.isSubGraphExpanded</a> set or bound to false).
</li>
<li>
Fixed animation that might revert some routes when the initial animation was turned off.
</li>
<li>
<a>Link.computeAdjusting</a> now only returns <a>Link,End</a> during animation only when routing is AvoidsNodes.
</li>
<li>
Fixed a regression since 2.1.29 where an <a>Overview</a> would not update with a newly set <a>Overview.observed</a> Diagram
and a newly displayed HTMLDivElement until some activity happened on that observed Diagram.
</li>
</ul>
<h4 id="2.1.30">Changes for 2.1.30</h4>
<ul>
<li>
Changed the behavior of <a>GraphLinksModel</a> so that the use of a key of a non-existent node
can be resolved by adding a node with that key in a later transaction, not just in the same transaction.
</li>
<li>
Fixed routing of duplicate orthogonal links between ports with "...Side" Spots to avoid producing little loops
when the ports are close to each other.
</li>
<li>
Fixed <a>ContextMenuTool</a> to automatically stop running if the newly shown context menu is
a not-<a>GraphObject.visible</a> <a>Adornment</a>.
</li>
<li>
Fixed exception on expanding a <a>Group</a> whose member nodes had partly disconnected links.
</li>
</ul>
<h4 id="2.1.29">Changes for 2.1.29</h4>
<ul>
<li>
Overviews now wait for the Diagram to draw first before attempting to draw.
This solves timing issues with <a>Diagram.delayInitialization</a>.
</li>
<li>
Fixed delays in updating the <a>Link.geometry</a> after changing properties such as <a>Link.corner</a>.
</li>
<li>
Fixed setting <a>Diagram.scrollMargin</a> during Diagram initialization, which would interrupt the initial transaction.
</li>
</ul>
<h4 id="2.1.28">Changes for 2.1.28</h4>
<ul>
<li>
Added the <a>Diagram.ensureBounds</a> method.
Like <a>Part.ensureBounds</a>, this is useful when you need the document bounds computed immediately.
It is rare that you will need to call either method, because the normal updating process will
perform the computations for you as part of a transaction, asynchronously.
</li>
<li>
Fixed some parsing issues when using <a>Geometry.parse</a> or <a>Shape.geometryString</a> with SVG arcs.
</li>
<li>
Fixed the <a>Picture.source</a> setter from failing in non-DOM environments.
</li>
<li>
Fix for DOM-less environments that do not have <code>setImmediate</code> defined.
</li>
<li>
Fix for Link routing when connecting to the edge of an arc segment.
</li>
</ul>
<h4 id="2.1.27">Changes for 2.1.27</h4>
<ul>
<li>
Fixed the routing of links connected with nodes that are members of expanded groups inside collapsed groups.
</li>
<li>
Fixed some Shapes in Link Selection Adornments inheriting their <code>strokeWidth</code> from the Link.
Only the main path Shapes of Link "Selection" Adornments with a <code>strokeWidth</code> of 0 will inherit
the <code>strokeWidth</code> from the adorned <a>Link.path</a> Shape.
</li>
<li>
Fixed changing <a>Picture.source</a> back to an empty string not to throw an unnecessary error.
</li>
</ul>
<h4 id="2.1.26">Changes for 2.1.26</h4>
<ul>
<li>
Added a <code>ResizeObserver</code> to automatically detect changes in the size of the
HTMLDivElement (the <a>Diagram.div</a>) in recent browsers.
You will still need to call <a>Diagram.requestUpdate</a> when running in older browsers or in Internet Explorer.
</li>
<li>
Added the <a>ResizingTool.dragsMembers</a> property, for controlling whether resizing a
<a>Group</a> may move its <a>Group.memberParts</a> if it has no <a>Placeholder</a>.
</li>
<li>
Fixed regression since 2.1.24 causing some diagrams not to be drawn even after calling <a>Diagram.requestUpdate</a>.
</li>
<li>
Fixed some cases of finding the nearest intersection point of Bezier curves with a straight finite line.
</li>
</ul>
<h4 id="2.1.25">Changes for 2.1.25</h4>
<ul>
<li>
Added the <a href="samples/connectionBoxNode.html">Connection Box Node</a> sample,
showing nodes that allow links between ports within a node.
</li>
<li>
In order to avoid possible errors caused by loading the GoJS library more than once,
an Error is thrown when a second load is detected, even if the version number is the same.
This helps avoid problems where there are multiple definitions for each of the classes, causing errors such as:
<code>Error: Unknown type of binding target: Node#241</code>, where the object is a GoJS <a>Node</a>,
but not the same GoJS Node class as the code expects.
It also helps avoid situations when both the release library and the debug library are loaded.
</li>
<li>
Fixed raising an extraneous <a>Diagram.mouseOver</a> event during initialization.
</li>
<li>
Fixed a regression since 2.1.0 that would prevent a Diagram or Overview from re-scaling or aligning when its DIV changed size.
</li>
<li>
Fixed invalidating routes of external links when nested groups change their visibility in ways
other than expanding trees or subgraphs.
</li>
<li>
Fixed <a>Model.mergeNodeDataArray</a>, <a>GraphLinksModel.mergeLinkDataArray</a>, and <a>Model.applyIncrementalJson</a>
to set known properties, eg. <a>GraphLinksModel.nodeGroupKeyProperty</a>, even when the property is not present on the new data.
</li>
</ul>
<h4 id="2.1.24">Changes for 2.1.24</h4>
<ul>
<li>
Added the <a href="samples/multiColorLinks.html">Multi-color Links</a> sample,
showing links whose paths can be stroked with multiple colors specified in an Array
as the value of the link's <code>data.colors</code>.
</li>
<li>
Associating a <a>Diagram</a> instance with an HTMLDivElement now causes that Div element to get two new properties:
"goDiagram" to refer to that Diagram instance, and "go" to refer to the "go" namespace if it exists.
This makes it easier to examine or set Diagram properties or to call Diagram methods or methods on GraphObjects
in existing apps without access to the app's source code.
</li>
<li>
Fixed using subclasses of <a>GraphLinksModel</a> or <a>TreeModel</a>.
</li>
<li>
Fixed <a>AnimationTrigger</a>s incorrectly starting when <a>AnimationManager.isEnabled</a> is set to <code>false</code>.
</li>
<li>
Fixed extraneous Transaction <a>ChangedEvent</a>s when modifying a group invalidated a layout.
</li>
</ul>
<h4 id="2.1.23">Changes for 2.1.23</h4>
<ul>
<li>
Added the <a href="extensions/ArrangingLayout.js" target="_blank">Arranging Layout</a> extension,
demonstrated in the <a href="extensions/Arranging.html" target="_blank">Arranging</a> sample.
This layout is basically a layout of layouts, so that you can have a <a>CircularLayout</a> of <a>CircularLayout</a>s,
as shown in the sample, or a <a>PackedLayout</a> of <a>TableLayout</a>s, or whatever.
The <a>ArrangingLayout</a> also has a third layout that is used to position nodes not arranged by the main layout.
This is normally a <a>GridLayout</a> that only positions singleton (disconnected) nodes.
</li>
<li>
Improved the <a>ParallelLayout</a> extension and rewrote the
<a href="samples/flowgrammer.html" target="_blank">Flowgrammer</a> sample to use that <b>ParallelLayout</b>.
</li>
<li>
Fixed <a>UndoManager</a> sometimes adding a duplicate "Layout" transaction to the <a>UndoManager.history</a>.
</li>
</ul>
<h4 id="2.1.22">Changes for 2.1.22</h4>
<ul>
<li>
Added the <a href="extensions/RescalingTool.js" target="_blank">Rescaling Tool</a> extension,
demonstrated in the <a href="extensions/Rescaling.html" target="_blank">Rescaling</a> sample.
This tool modifies the <a>GraphObject.scale</a> property,
unlike the <a>ResizingTool</a> which modifies the <a>GraphObject.desiredSize</a> property.
</li>
<li>
Improved performance of <a>Model.mergeNodeDataArray</a>, <a>GraphLinksModel.mergeLinkDataArray</a>, and <a>Model.toIncrementalData</a>.
The merge methods require that references are not shared between the the GoJS model and the external data provided and will now make deep copies
of any new data objects before adding them to the model. This means <a>Model.cloneDeep</a> doesn't need to be called on the arrays passed in,
as the merge methods will make the necessary calls.
</li>
<li>
Fixed `go-module.js` to work when treated as an ES6 module in Node.js.
At the same time we have added `go.mjs` and `go-debug.mjs` as copies of `go-module.js` and `go-debug-module.js`.
For compatibility the kit will contain both sets of files.
</li>
<li>
Fixed automatically performing layouts of outer groups after inner nested groups changed size.
</li>
</ul>
<h4 id="2.1.21">Changes for 2.1.21</h4>
<ul>
<li>
Added the <a href="extensions/SwimLaneLayout.js" target="_blank">Swim Lane Layout</a> extension,
demonstrated in the <a href="extensions/SwimLaneLayout.html" target="_blank">Swim Lane Layout</a> sample.
This layout is a version of <a>LayeredDigraphLayout</a> that positions each node in the lane in which it is supposed to be.
</li>
<li>
Fixed parts that have their location or position set when not in the Diagram.
This issue affected temporary parts, such as Adornments created by Tools that were repeatedly added and removed from the Diagram.
</li>
<li>
Fixed ordering of links on a <a>Spot,TopSide</a> or <a>Spot,BottomSide</a> port when linking with a node to the right.
</li>
<li>
Fixed some scaling animations when <a>Diagram.autoScale</a> is set.
</li>
</ul>
<h4 id="2.1.20">Changes for 2.1.20</h4>
<ul>
<li>
Fixed <a>GraphLinksModel.setLabelKeysForLinkData</a> sometimes disassociating a link's label nodes that existed in both the old and new array.
</li>
<li>
Fixed the recording of model changes bound to a Part's <code>position</code> or <code>location</code>, where they may not have been recorded
in the UndoManager when modifying the <code>position</code>, <code>location</code>, or <code>desiredSize</code>.
This also fixes a regression from 2.1.14.
</li>
<li>
Fixed <a>LinearGradient</a> painting when used as a <a>Shape.stroke</a>.
This drawing issue was most apparent when the Shape's geometry was one-dimensional.
</li>
<li>
Fixed warning messages in Chrome about passive touch event listeners.
</li>
<li>
Fixed JumpOver and AvoidsNodes issues where ongoing animations might stop them from updating.
</li>
</ul>
<h4 id="2.1.19">Changes for 2.1.19</h4>
<ul>
<li>
Fixed changing <a>Placeholder.padding</a> to remeasure its <a>Group</a> or <a>Adornment</a>.
</li>
<li>
Fixed <a>Diagram.initialPosition</a> and <a>Diagram.initialScale</a> sometimes not showing scrollbars on initialization.
</li>
<li>
Fixed not recording a transaction that was empty until a "CommittingTransaction" Transaction-type <a>ChangedEvent</a>
caused some <a>ChangedEvent</a>s to made, a regression from 2.1.16.
</li>
</ul>
<h4 id="2.1.18">Changes for 2.1.18</h4>
<ul>
<li>
Added the <a href="samples/belts.html">Belts and Rollers</a> sample,
showing belts or chains wending around rollers or gears.
</li>
<li>
Fixed finding a node by key after undoing a call to <a>Model.setKeyForNodeData</a>.
</li>
<li>
Fixed Diagram initialization without DIVs or with delayed initialization,
where setting some properties like <a>Diagram.scaleComputation</a> would cause measuring errors.
</li>
<li>
Improved handling of numeric large arc flag values when creating SVG arc <a>PathSegment</a>s via <a>PathSegment.constructor</a>.
</li>
<li>
Fixed the TypeScript declaration for <a>GraphObject,make</a> to handle <a>AnimationTrigger</a>s.
</li>
</ul>
<h4 id="2.1.17">Changes for 2.1.17</h4>
<ul>
<li>
Added the <a href="samples/radialAdornment.html">Radial Adornment Buttons</a> sample,
showing a selection <a>Adornment</a>, only on one node, that is like a context menu
with buttons arranged in a circle around the selected node.
</li>
<li>
Added the <a href="samples/donutCharts.html">Donut Charts</a> sample,
showing a simple circular bar chart in each node.
</li>
<li>
Fixed exporting the <a>Picture.reloadSource</a> and <a>Picture.redraw</a> methods.
</li>
<li>
Fixed the <a>LinkingBaseTool.temporaryFromPort</a> and <a>LinkingBaseTool.temporaryToPort</a> property setters
to replace the port of the corresponding temporary node. This allows customization of a <a>LinkingTool</a>
by setting either or both of those two properties.
</li>
<li>
Fixed <a>Diagram.makeImage</a> with a Picture SVG data URI source, in the same manner as in 2.1.16.
</li>
<li>
Fixed undo of a <a>Shape.geometry</a> setting, after its <a>GraphObject.desiredSize</a> had been set.
This particular sequence of events was discovered in the use of the <a>GeometryReshapingTool</a> extension.
</li>
</ul>
<h4 id="2.1.16">Changes for 2.1.16</h4>
<ul>
<li>
Added the <a href="samples/animatedFocus.html">Animated Focus</a> sample,
which demonstrates how to scroll to a node and really make it obvious where the node is
and what it looks like.
</li>
<li>
Added the <a href="samples/addToPalette.html">Add To Palette</a> sample,
which allows the user to add items from the palette by selecting a node,
customizing it, and then executing a command to copy it to the palette's model.
The user can also remove selected items from the palette via a command,
even though <a>Palette.isReadOnly</a> is true.
</li>
<li>
Fixed <a>Diagram.makeImage</a> when a Picture has an SVG source that has a different size than its viewbox.
In some browsers the SVGs had been drawn with the incorrect aspect ratio.
</li>
<li>
Fixed <a>Diagram.delayInitialization</a> incorrectly resetting the <a>Diagram.position</a> when animation is enabled.
</li>
</ul>
<h4 id="2.1.15">Changes for 2.1.15</h4>
<ul>
<li>
Added the <a href="samples/singlePage.html">Single Page Diagram</a> sample,
demonstrating how to show a sheet of paper behind the diagram and how to limit
dragging and resizing to stay within the margins of the page.
</li>
<li>
Fixed label TextBlocks in <a href="intro/graduatedPanels.html">Graduated Panels</a> not respecting their assigned <a>GraphObject.angle</a>.
The angle will now be used when the label's <a>GraphObject.segmentOrientation</a> is <a>Link.None</a>, <a>Link.OrientAlong</a>,
or <a>Link.OrientUpright</a>.
</li>
<li>
Fixed expand and collapse animations, where collapsed objects would temporarily receive NaN locations.
</li>
</ul>
<h4 id="2.1.14">Changes for 2.1.14</h4>
<ul>
<li>
Added the <a href="samples/blockEditor.html">Simple Block Editor</a> sample,
demonstrating how to let users easily build block diagrams.
</li>
<li>
Changing <a>Link.fromShortLength</a> or <a>Link.toShortLength</a> no longer invalidates the link's route.
</li>
<li>
Improved the corner curves of orthogonal links when needing to make consecutive turns within double the corner radius.
</li>
<li>
Fixed an incorrect optimization introduced in 2.1.13 updating initial scrollbars when animating.
</li>
<li>
Fixed undo and redo of <a>ResizingTool</a> operations when the <a>Part.locationSpot</a> is not TopLeft.
</li>
</ul>
<h4 id="2.1.13">Changes for 2.1.13</h4>
<ul>
<li>
Fixed the cursor shown during a drag in an <a>Overview</a> if some external HTML element changed the cursor.
</li>
<li>
Fixed <a>Diagram.makeSvg</a> when rendering a fill or a stroke that is translucent not to make the opacity too small.
</li>
<li>
Added wait spinners to three of the "Virtualized" samples:
<a href="samples/virtualized.html" target="_blank">Virtualized</a>,
<a href="samples/virtualizedForceLayout.html" target="_blank">VirtualizedForceDirectedLayout</a>,
<a href="samples/virtualizedTreeLayout.html" target="_blank">VirtualizedTreeLayout</a>.
These use an image rotated using CSS animation that is positioned in front of the Diagram.
</li>
</ul>
<h4 id="2.1.12">Changes for 2.1.12</h4>
<ul>
<li>
Added the <a href="samples/controlGauges.html">Meter and Gauge Controls</a> sample,
demonstrating several different kinds of meter and gauge instruments whose values
can also be modified by the user by dragging their indicators.
</li>
<li>
Added the <a href="samples/productionEditor.html">Production process editor</a> sample,
which edits diagrams that can be shown by the
<a href="samples/productionProcess.html">Production process</a> sample.
</li>
<li>
Added the <a>SnapLinkReshapingTool.avoidsNodes</a> property in the extensions directories.
</li>
</ul>
<h4 id="2.1.11">Changes for 2.1.11</h4>
<ul>
<li>
Fixed "Grid" Panels to ignore the order of shapes in the panel when considering whether a larger <a>Shape.interval</a>
shape should suppress a smaller interval shape, or should be suppressed by a larger interval shape.
Changed "Grid" Panels to allow multiple shapes with the same <a>Shape.interval</a> to be drawn in the same orientation
(horizontal or vertical).
</li>
<li>
Fixed documentation by undocumenting the useless <a>AnimationManager.animationReasons</a> property that was accidentally documented.
See the updated documentation for <a>AnimationManager.canStart</a>.
</li>
<li>
Fixed <a>Brush.isDark</a> sometimes using an incorrect ordering of <a>Brush.colorStops</a>
when determining darkness near the middle of a Brush.
</li>
</ul>
<h4 id="2.1.10">Changes for 2.1.10</h4>
<ul>
<li>
Added <a>DrawCommandHandler.pullToFront</a> and <a>DrawCommandHandler.pushToBack</a> commands in the extensions directories.
</li>
</ul>
<h4 id="2.1.9">Changes for 2.1.9</h4>
<ul>
<li>
Fixed breadth computations for some cases of <a>TreeLayout.arrangement</a> of separate trees
when <a>TreeLayout.compaction</a> is <code>go.TreeLayout.CompactionNone</code>.
</li>
<li>
Fixed type declarations of <a>Binding.converter</a> and <a>Binding.backConverter</a>
to return <code>any</code> instead of <code>void</code>.
</li>
</ul>
<h4 id="2.1.8">Changes for 2.1.8</h4>
<ul>
<li>
Added the <a href="samples/gameOfLife.html">Game of Life cellular automation</a> sample.
</li>
<li>
You can improve the performance of an <a>Overview</a> that is observing a large diagram with a visible <a>Diagram.grid</a>
by setting <a>Overview.drawsTemporaryLayers</a> to false.
</li>
<li>
Improved the behavior from 2.1.7 when trying to open text editors in multiple diagrams.
A new text editor can be started only if the previous one was able to be accepted.
If <a>TextBlock.textValidation</a> or <a>TextEditingTool.textValidation</a> fails,
focus remains in that older editor and a new one cannot be started.
</li>
<li>
Fixed exception during copy-dragging when some parts are not <a>Part.copyable</a>.
</li>
</ul>
<h4 id="2.1.7">Changes for 2.1.7</h4>
<ul>
<li>
Added the <a href="extensions/PackedHierarchy.html">Packed Hierarchy</a> sample,
which demonstrates a custom <a>PackedLayout</a> for nested circular groups.
</li>
<li>
Added an optional argument to <a>Diagram.clearSelection</a>, and allowed that method to be overridden.
</li>
<li>
The <a>TextEditingTool</a> now only allows one active text editor globally, instead of one per Diagram.
This avoids some focus problems in various browsers.
</li>
</ul>
<h4 id="2.1.6">Changes for 2.1.6</h4>
<ul>
<li>
The <code>release/go-module.js</code> file now exports every class, so that you can import only specific classes, instead of <code>go</code>.
For example: <code>import { Diagram, Node, Link, Point, Shape, TextBlock } from ...</code>.
</li>
<li>
Added a sample demonstrating generating a PDF file for a Diagram, in the <code>projects/pdf</code> subdirectory.
The sample is at <a href="projects/pdf/minimalPDF.html" target="_blank">minimalPDF</a>.
</li>
<li>
Fixed <a>AnimationTrigger</a>s erroneously starting when dragging and dropping Parts from another Diagram or Palette.
</li>
<li>
Fixed <a>LinkingTool</a> not deselecting other parts when a new link is created.
</li>
</ul>
<h4 id="2.1.5">Changes for 2.1.5</h4>
<ul>
<li>
Added <a href="extensionsTS/VirtualizedPacked.html">VirtualizedPacked</a> sample,
which demonstrates a custom layout for large graphs of nested groups,
defined in <a href="extensionsTS/VirtualizedPackedLayout.ts">VirtualizedPackedLayout.ts</a>.
(Source is TS only)
</li>
<li>
Fixed setting a node key reference in either a node or link via <a>GraphLinksModel.setGroupKeyForNodeData</a>,
<a>GraphLinksModel.setFromKeyForLinkData</a>, or <a>GraphLinksModel.setToKeyForLinkData</a> where it could fail to resolve
if the node did not yet exist. This issue did not exist during typical model loading.
</li>
<li>
Fixed a regression since 2.1.1 with <a>Diagram.clear</a> failing to clear internal Parts lists (like <a>Diagram.nodes</a>).
</li>
</ul>
<h4 id="2.1.4">Changes for 2.1.4</h4>
<ul>
<li>
Added <a>Link.computeAdjusting</a> to conditionally change the value of <a>Link.adjusting</a> used. As a new default,
links will use the adjusting value <a>Link,End</a> during animation. <a>Link.computeAdjusting</a> can be overridden to change this behavior.
</li>
<li>
Added <a>Geometry.getPointAlongPath</a>, <a>Geometry.getAngleAlongPath</a>, and <a>Geometry.getFractionForPoint</a>.
These methods can be used to find a point or angle for a given fractional distance along a Geometry's path,
or to find the fractional distance along the Geometry's path given a nearby point.
</li>
<li>
Setting <a>GraphObject.segmentIndex</a> to NaN, which was previously an error,
will now treat the entire link path as the segment for the purpose of <a>GraphObject.segmentFraction</a>.
This allows for using fractional distances along the entire link rather than just one segment.
</li>
<li>
Fixed object picking during Diagram's InitialLayoutCompleted DiagramEvent.
</li>
<li>
Fixed GoCloudStorage where a null defaultModel would fail.
</li>
<li>
Fixed <a>Panel.graduatedValueForPoint</a> in cases where the main shape was a diagonal line
and the provided point didn't fall on the line.
</li>
</ul>
<h4 id="2.1.3">Changes for 2.1.3</h4>
<ul>
<li>
Fixed a regression from 2.0.0 with AvoidsNodes links improperly re-routing when using the DraggingTool.
</li>
<li>
Fixed a undo (redo) bug with <a>AnimationTrigger</a>s that used location or position on Parts.
</li>
<li>
Improved routing of duplicate links that have <a>Link.adjusting</a> set to a value other than None and have
more than the standard number of points in their route.
</li>
</ul>
<h4 id="2.1.2">Changes for 2.1.2</h4>
<ul>
<li>
Fixed a regression in 2.1.1 with the timing of <code>InitialAnimationStarting</code> that would prevent custom
initial animations.
</li>
<li>
CTRL + Mouse-wheel will still stop the event from bubbling,
even if <a>CommandHandler.canIncreaseZoom</a> or <a>CommandHandler.canDecreaseZoom</a> return false.
These are potentially false if a <a>Diagram.minScale</a> or <a>Diagram.maxScale</a> are set.
This change stops the entire page from accidentally zooming during a zoom-wheel operation.
</li>
<li>
Fixed a measuring bug with Link Geometry when the Link is smaller than the <a>Link.toShortLength</a> or <a>Link.fromShortLength</a>.
</li>
</ul>
<h4 id="2.1.1">Changes for 2.1.1</h4>
<ul>
<li>
Fixed updating of <a>Adornment</a>s when there are <a>Binding</a>s from <a>Model.modelData</a>
and that shared object has been modified by calling <a>Model.set</a>.
</li>
<li>
Improved performance when replacing <a>Diagram.model</a> when cleaning up the old model,