See also: the official libGDX changelog.

1.12.1-rc1

[UPDATE] Updated to libGDX 1.12.1.
[UPDATE] Updated to Kotlin 1.9.20.
[UPDATE] Updated to Kotlin Coroutines 1.7.3.
[UPDATE] Updated to VisUI 1.5.3.
[UPDATE] Updated to Dokka 1.9.10.
[FEATURE] (ktx-math) New extension and factory function were introduced to Vector4, offering similar utilities to other vectors.
- vec4 factory methods allow creating new Vector4 instances with default and named parameters.
- +=, -=, *=, /= mutating operators are now supported.
- +, - (including unary -), ++, --, *, / operators are now supported, returning new instances of vectors as a result.
- Vectors are now comparable by length, adding support for <, >, <=, >= operators.
- Vector4 instances can now be deconstructed into 4 four values (X, Y, Z, W) using extension component methods.
- dot infix function allows calculating the dot product of 2 vectors.

1.12.0-rc1

[UPDATE] Updated to libGDX 1.12.0.
[UPDATE] Updated to Kotlin 1.9.0.
[UPDATE] Updated to Kotlin Coroutines 1.7.2.
[UPDATE] Updated to VisUI 1.5.2.
[UPDATE] Updated to Dokka 1.8.20.
[MISC] KTX project should now work locally under JDK 17, including the test suite.
[FEATURE] (ktx-app) KtxInputAdapter now supports the touchCancelled event handling. By default, it calls the touchUp method for consistency with the previous libGDX versions.

1.11.0-rc6

[UPDATE] Updated to Kotlin 1.8.21.
[UPDATE] Updated to Kotlin Coroutines 1.7.1.
[UPDATE] Updated to Gradle 7.6.1.
[UPDATE] Updated to Dokka 1.8.10.
[FEATURE] (ktx-ai) new KTX module with utilities and type-safe builders for gdxAI.
- Type aliases to avoid name clashes with common libraries:
  - GdxAiSequence<E> for com.badlogic.gdx.ai.btree.branch.Sequence<E>
  - GdxAiSelector<E> for com.badlogic.gdx.ai.btree.branch.Selector<E>
  - GdxAiRandom<E> for com.badlogic.gdx.ai.btree.decorator.Random<E>
- Extension functions for building behavior trees:
  - add
  - behaviorTree
  - dynamicGuardSelector
  - parallel
  - randomSelector
  - randomSequence
  - selector
  - sequence
  - alwaysFail
  - alwaysSucceed
  - include
  - invert
  - random
  - repeat
  - semaphoreGuard
  - untilFail
  - untilSuccess
  - failureLeaf
  - successLeaf
  - waitLeaf

1.11.0-rc5

[UPDATE] Updated to Kotlin 1.8.10.
[FIX] (ktx-assets-async) AssetStorage no longer uses ConcurrentHashMap.getOrDefault method unsupported on older Android devices.

1.11.0-rc4

[UPDATE] Updated to Kotlin 1.8.0.
[UPDATE] Updated to VisUI 1.5.1.
[MISC] Project README now includes installation instructions for new projects using gdx-liftoff.
[MISC] Sample KTX projects are now generated by gdx-liftoff on every release.
- Basic project demo.
- Experimental project demo with web support via TeaVM.
[MISC] Removed migration guides from ktx-scene2d and ktx-vis README files. If you are migrating from an old KTX version, please refer to the 1.11.0-rc3 tag.
[FEATURE] (ktx-assets-async) AssetStorage.silenceAssetManagerWarnings property was added, allowing to silence logging on non-fatal AssetLoader issues.
[FEATURE] (ktx-assets-async) AssetManagerWrapper warnings caused by AssetLoader issues were extended and improved.

1.11.0-rc3

[UPDATE] Updated to Kotlin 1.7.22.
[UPDATE] Updated to Dokka 1.7.20.
[FEATURE] (ktx-ashley) Added tagFor<Component> utility functions that automatically create a mapper for a flag component. These properties can be used to check for Component presence within the Entity, as well as automatically add and remove Component instances upon property modification.
[FEATURE] (ktx-artemis) new KTX module with Artemis-odb entity component system utilities: ktx-artemis.
- ArchetypeBuilder.add and ArchetypeBuilder.remove extension methods for adding and removing components from an ArchetypeBuilder.
- oneOf, allOf, exclude DSL and extension methods for Aspect.Builder.
- EntityEdit.plusAssign operator function for adding components.
- EntityEdit.with builder function for adding components to an entity.
- EntityEdit.remove extension function for removing components from an entity.
- EntityTransmuterFactory.add and EntityTransmuterFactory.remove extension functions for adding and removing components from an EntityTransmuterFactory.
- ComponentMapper.contains operator function to check if an entity has a component.
- World.edit extension builder function to edit an entity.
- World.entity extension builder function to create and edit an entity.
- World.get operator function for retrieving a system which returns null if it doesn't exist.
- World.getSystem extension function for retrieving a system which throws an exception if it doesn't exist.
- World.mapperFor extension function for retrieving a ComponentMapper instance.
[FEATURE] (ktx-assets-async) AssetStorage now stores a basic path-to-type map, which allows it to support more AssetManager methods called by some AssetLoader implementations. These include:
- AssetManager.contains(String)
- AssetManager.get(String)
- AssetManager.get(String, Boolean)
- AssetManager.get(String, Class, Boolean)
- AssetManager.getAssetType(String)
- AssetManager.isLoaded(String)
- AssetManager.unload(String)
- AssetManager.getDependencies(String)
- AssetManager.getReferenceCount(String)

1.11.0-rc2

[UPDATE] Updated to Kotlin 1.7.10.
[UPDATE] Updated to Kotlin Coroutines 1.6.4.
[UPDATE] Updated to Dokka 1.7.10.
[MISC] New Dokka theme is available on the documentation website.
[FEATURE] (ktx-actors) Added Actor.onEnter, Actor.onExit, Actor.onEnterEvent and Actor.onExitEvent extension methods that attach ClickListener instances listening for enter and exit events.
[FEATURE] (ktx-ashley) Added ComponentDelegate and OptionalComponentDelegate that allow accessing component via Entity extension properties.
[FEATURE] (ktx-ashley) Added propertyFor<Component> and optionalPropertyFor<Component> utility functions that automatically create a mapper for the component delegates.

1.11.0-rc1

[UPDATE] Updated to libGDX 1.11.0.
[MISC] Gradle dependencies changed from compile-only to API scope.
[FEATURE] (ktx-app) Added gdxError utility that throws a GdxRuntimeException.
[FIX] (ktx-assets-async) Fixed a niche bug with AsyncAssetManager which could lead to missed callbacks after attempting to load the same asset concurrently with loadAsync.

1.10.0-rc2

[UPDATE] Updated to Kotlin 1.6.21.
[UPDATE] Updated to Kotlin Coroutines 1.6.1.
[FEATURE] (ktx-ashley) Added utilities for working with Ashley's EntityListener interface:
- EntityAdditionListener: an interface extending EntityListener that only requires implementation of the entityAdded method.
- EntityRemovalListener: an interface extending EntityListener that only requires implementation of the entityRemoved method.
- Engine.onEntityAdded and Engine.onEntityRemoved extension methods that create entity listeners from lambdas.
- Wrappers for Engine.onEntityAdded and Engine.onEntityRemoved for IteratingSystem, IntervalIteratingSystem and SortedIteratingSystem that use system's Family and Engine automatically.
[FEATURE] (ktx-script) Added KotlinScriptEngine.evaluateOn methods that can execute scripts with a custom receiver.
[CHANGE] (ktx-script) Generic libGDX and Java exceptions replaced with a custom ScriptEngineException.

1.10.0-rc1

[UPDATE] Updated to Kotlin 1.6.10.
[UPDATE] Updated to Kotlin Coroutines 1.6.0.
[MISC] Links to the libGDX wiki were updated.
[MISC] Stable KTX releases are now marked with the -rc suffix.
[FEATURE] (ktx-actors) Added Tree.onSelectionChange extension method that attaches a ChangeListener to a Tree.
[CHANGE] (ktx-scene2d) The generic Node type of KTreeWidget was changed to KNode<*>.
[FEATURE] (ktx-script) Added a new module with KotlinScriptEngine evaluating Kotlin scripts in runtime.
- evaluate(String): compiles and executes a script passed as a string.
- evaluate(FileHandle): compiles and executes a script from the selected file.
- evaluateAs<T>(String): compiles and executes a script passed as a string. Casts the result to T.
- evaluateAs<T>(FileHandle): compiles and executes a script from the selected file. Casts the result to T.
- set(String, Any): adds a variable to the script execution context.
- get(String): returns the current value assigned to the selected variable.
- remove(String): removes the variable registered under the given name.
- import(String, String?): adds an import to the script context. Accepts optional alias.
- importAll(vararg String), importAll(Iterable<String>): adds the selected imports to the script context.
- setPackage(String): sets the package for the scripts.
[CHANGE] (ktx-vis) The generic Node type of KVisTree was changed to KNode<*>.

1.10.0-b4

[UPDATE] Updated to Gradle 7.2.
[UPDATE] Updated to Dokka 1.5.30.
[FEATURE] (ktx-app) Added Platform object that exposes various utilities for platform-specific code.
- Platform.currentPlatform returns current ApplicationType or throws GdxRuntimeException if unable to determine.
- Platform.version returns the current version of the platform (e.g., Android API version, iOS major OS version).
- Boolean properties that allow to determine current platform:
  - Platform.isAndroid checks if the current platform is Android.
  - Platform.isDesktop checks if the current platform is desktop with graphical application.
  - Platform.isHeadless checks if the current platform is desktop without graphical application.
  - Platform.isiOS checks if the current platform is iOS.
  - Platform.isMobile checks if the current platform is Android or iOS.
  - Platform.isWeb checks if the current platform is HTML/WebGL.
- Inlined methods that allow to execute code on specific platforms:
  - Platform.runOnAndroid executes an action if the current platform is Android. Returns action result or null.
  - Platform.runOnDesktop executes an action if the current platform is desktop. Returns action result or null.
  - Platform.runOnHeadless executes an action if the current platform is headless desktop. Returns action result or null.
  - Platform.runOniOS executes an action if the current platform is iOS. Returns action result or null.
  - Platform.runOnMobile executes an action if the current platform is Android or iOS. Returns action result or null.
  - Platform.runOnWeb executes an action if the current platform is HTML/WebGL. Returns action result or null.
- Inlined runOnVersion executes an action if the current platform version is within minimum and maximum values.
[FEATURE] (ktx-ashley) Mapper abstract class designed for companion objects of Components. Allows to easily obtain instances of a ComponentMapper corresponding to the enclosing Component class.
[FEATURE] (ktx-assets-async) AssetStorage.loadSync(String) now supports optional loading parameters.
[FEATURE] (ktx-collections) isEmpty and isNotEmpty extension methods of libGDX collections now support Kotlin contracts. If they return true, the collection is implied not to be null.
[CHANGE] (ktx-collections) As IdentityMap now extends ObjectMap, some redundant utilities specific to IdentityMap were removed. From the user point of view, all additional functionalities are covered by the ObjectMap utilities.
[FEATURE] (ktx-freetype-async) AssetStorage.loadFreeTypeFontAsync was added, mimicking loadAsync behavior.
[FEATURE] (ktx-freetype-async) AssetStorage.loadFreeTypeFontSync was added, mimicking loadSync behavior.
[FEATURE] (ktx-freetype-async) AsyncAssetManager.loadFreeTypeFontAsync was added, returning a Deferred<BitmapFont> instance.
[CHANGE] (ktx-scene2d) Scene2DSkin.defaultSkin now throws IllegalStateException when accessed before overriding.

1.10.0-b3

[UPDATE] Updated to Kotlin 1.5.31.
[UPDATE] Updated to Kotlin Coroutines 1.5.2.
[FEATURE] (ktx-assets-async) AssetStorage now supports loading PolygonRegion assets out of the box if the default loaders are registered.
[FEATURE] (ktx-assets-async) AsyncAssetManager is a new AssetManager extension with basic support for Kotlin coroutines.
- AsyncAssetManager.loadAsync allows to schedule an asset for loading, returning a Deferred asset reference.
- AsyncAssetManager.getDefaultParameters allows to create a default instance of AssetLoaderParameters for a selected asset.
- AsyncAssetManager.setLoaderParameterSupplier has to be called for each custom asset loader in order to enable asynchronous loading without explicitly passing loader parameters.
[FEATURE] (ktx-collections) Factory methods for libGDX arrays of primitives:
- gdxBooleanArrayOf
- gdxByteArrayOf
- gdxCharArrayOf
- gdxShortArrayOf
- gdxIntArrayOf
- gdxLongArrayOf
- gdxFloatArrayOf
[FEATURE] (ktx-inject) New reflection-based Context methods with automatic dependency injection:
- newInstanceOf: constructs an instance of the selected class. Injects constructor dependencies from the Context.
- bind<Type>: registers a provider that creates a new instance of selected class via reflection each time it is requested.
- bindSingleton<Type>: creates, registers, and returns a singleton of selected class using reflection.
[FEATURE] (ktx-reflect) Added a new module with reflection utilities.
- Reflection annotation, which requires opt-in, allows marking functionalities that rely on reflection.
- ReflectedClass is an inlined wrapper for Class that allows to easily use libGDX reflection API.
  - ClassReflection methods exposed as ReflectedClass read-only properties:
    - simpleName
    - isMemberClass
    - isStatic
    - isArray
    - isPrimitive
    - isEnum
    - isAnnotation
    - isInterface
    - isAbstract
    - componentType
    - constructors
    - methods
    - declaredMethods
    - fields
    - declaredFields
    - annotations
    - declaredAnnotations
    - interfaces
    - enumConstants
  - ClassReflection methods exposed as ReflectedClass methods with improved Kotlin class handling:
    - isInstance
    - isAssignableFrom
    - newInstance
    - getConstructor
    - getDeclaredConstructor
    - getMethod
    - getDeclaredMethod
    - getField
    - getDeclaredField
    - isAnnotationPresent
    - getAnnotation
    - getDeclaredAnnotation
  - Additional ReflectedClass utilities:
    - constructor property allows to extract the only class constructor if it is available.
    - newArrayInstance method allows to create a type array of the given size using ArrayReflection.
    - KClass constructor allows creating ReflectedClass from a KClass.
- reflect<Type>() function allows to wrap a selected class with ReflectedClass.
- reflect(KClass<Type>) function allows to wrap a selected KClass with ReflectedClass.
- reflect(Class<Type>) function allows to wrap a selected Class with ReflectedClass.
- reflect(String) function allows to find a selected class by qualified name and wrap it with ReflectedClass.
- Annotation.get extension method with a reified type allowing to get an instance of the annotation.

1.10.0-b2

[UPDATE] Updated to Gradle 7.0.2.
[UPDATE] Updated to Kotlin 1.5.21.
[UPDATE] Updated to Kotlin Coroutines 1.5.1.
[UPDATE] Updated to VisUI 1.5.0.
[CHANGE] The JVM target compatibility of all modules was set to 1.8, since Java 1.6 target was deprecated and is incompatible with the latest coroutines library. Note that source compatibility level is still set to 1.7.
[FEATURE] (ktx-assets) Added discard lambda parameter to the pool factory method that is invoked after an object is rejected from the created Pool.
[FEATURE] (ktx-scene2d) Added support for ParticleEffectActor in Scene2D DSL via particleEffect factory method.
[FEATURE] (ktx-log) Added DEBUG, INFO and ERROR constants with default logger tags.
[CHANGE] (ktx-log) Default tags are no longer wrapped in square brackets. This caused a change of the logs structure.
[CHANGE] (ktx-log) Logger.tag variable was renamed to Logger.name.
[CHANGE] (ktx-log) Log prefix variables from Logger were removed. Message tags are now configurable directly through the constructor.
[CHANGE] (ktx-log) Logger name is no longer a part of the message tag. Instead, it is now prepended to the message. This causes a change of the logs structure.
[FEATURE] (ktx-log) Added Logger.buildMessage method that allows to modify logged message structure. This method can be overridden when extending the Logger class, simplifying the usage of custom message formats.

1.10.0-b1

[UPDATE] Updated to libGDX 1.10.0.
[CHANGE] The Java source compatibility and JVM target version of the KTX modules was changed from 1.6 to 1.7.

1.9.14-b2

[UPDATE] Updated to Ashley 1.7.4.
[UPDATE] Updated to Kotlin 1.4.32.
[UPDATE] Updated to Kotlin Coroutines 1.4.3.
[UPDATE] Updated to Gradle 6.8.3.
[UPDATE] Updated to Dokka 1.4.30.
[MISC] Due to the newly added support for multimodule projects in Dokka, published documentation URLs will change.
[FEATURE] (ktx-tiled) Added isEmpty and isNotEmpty extension function for MapLayers and MapObjects collections.
[FEATURE] (ktx-tiled) Added forEachLayer extension function for TiledMap to iterate over an exact type of MapLayer instances of a specific map.
[FIX] (ktx-vis) visScrollPane and visSplitPane now define the correct types for this in the init lambdas, adding support for Scene2D and VisUI DSL.

1.9.14-b1

[UPDATE] Updated to libGDX 1.9.14.
[UPDATE] Updated to Kotlin 1.4.30.
[UPDATE] Updated to VisUI 1.4.11.
[FEATURE] (ktx-app) clearScreen now accepts additional clearDepth boolean parameter that controls whether the GL_DEPTH_BUFFER_BIT is added to the mask.
[FEATURE] (ktx-assets-async) Added AssetStorageSnapshot class that stores a copy of AssetStorage state for debugging purposes. Supports formatted string output with prettyFormat.
[FEATURE] (ktx-assets-async) AssetStorage now includes takeSnapshot and takeSnapshotAsync methods that allow to copy and inspect the internal state of the storage for debugging purposes.
[FEATURE] (ktx-collections) Added getOrPut extension function for libGDX map collections including ObjectMap, IdentityMap, ArrayMap and IntMap.

1.9.13-b1

[UPDATE] Updated to libGDX 1.9.13.
[UPDATE] Updated to Kotlin 1.4.21-2.
[UPDATE] Updated to VisUI 1.4.8.
[FEATURE] (ktx-style) Added Skin.register extension method that allows to register widget styles with the DSL.
[FEATURE] (ktx-vis) Added flowGroup factory method that allows to construct FlowGroup actors.
[CHANGE] (ktx-vis) horizontalFlowGroup and verticalFlowGroup are now deprecated. Use flowGroup instead.

1.9.12-b1

[UPDATE] Updated to libGDX 1.9.12.
[UPDATE] Updated to Kotlin 1.4.20.
[UPDATE] Updated to Kotlin Coroutines 1.4.2.

1.9.11-b2

[UPDATE] Updated to Kotlin 1.4.10.
[UPDATE] Updated to Kotlin Coroutines 1.4.0.
[UPDATE] Updated to Gradle 6.7.
[UPDATE] Updated to Dokka 1.4.10-2.
[MISC] Groovy Gradle scripts and configuration files migrated to Kotlin.
[MISC] The generated sources documentation is vastly improved and moved to a new URL.
[FEATURE] (ktx-collections) Added GdxIdentityMap and GdxArrayMap aliases for libGDX IdentityMap and ArrayMap collections.
[FEATURE] (ktx-collections) Added set operator extension method to ArrayMap to support square brackets assignment.
[FEATURE] (ktx-graphics) Added optional Camera and projection matrix parameters to ShapeRenderer.use.
[FEATURE] (ktx-scene2d) Added image builders for NinePatch, TextureRegion, Texture and Drawable.

1.9.11-b1

[UPDATE] Updated to libGDX 1.9.11.
[UPDATE] Updated to Kotlin Coroutines 1.3.6.
[UPDATE] Updated VisUI to 1.4.6.
[FEATURE] (ktx-scene2d) Added a generic container factory method that supports adding a custom actor.

1.9.10-b7

[MISC] Added ktlint formatting. Contributors are asked to run format Gradle task before committing files.
[CHANGE] (ktx-actors) Deprecated Action.parallelTo and ParallelAction.parallelTo extension methods were removed. Use along instead.
[CHANGE] (ktx-actors) Touch event listeners attached with extension methods now extend InputListener rather than ClickListener.
[CHANGE] (ktx-actors) onTouchEvent parameters renamed from downListener and upListener to onDown and onUp.
[CHANGE] (ktx-actors) Event listeners attached with extension methods now consume the Actor as this. Listeners that used to consume actors as regular parameters now should rely on this instead.
[FEATURE] (ktx-actors) KtxApplicationAdapter, KtxGame and KtxScreen now explicitly implement the Disposable interface, matching the dispose method from ApplicationListener and Screen respectively. This allows to leverage existing Disposable utilities.
[FEATURE] (ktx-ashley) Added Engine.configureEntity extension method that allows to add components to an existing entity.
[FEATURE] (ktx-assets) Added DisposableRegistry and DisposableContainer for management of multiple Disposable instances.
[FEATURE] (ktx-graphics) Added support for Color destructuring syntax.
[CHANGE] (ktx-scene2d) Deprecated top-level widget factory methods and tooltip utilities were removed.

1.9.10-b6

[UPDATE] Updated to Kotlin 1.3.72.
[UPDATE] Updated to Dokka 0.10.1.
[CHANGE] Javadocs are no longer generated with Dokka. Since KTX focuses solely on Kotlin support for libGDX, usability from Java is not a priority. The generated Javadocs are not very helpful, especially for Kotlin development. Instead, the Javadoc jar published to Maven Central now contains exported Kotlin-compatible Dokka documentation. Starting from this release, GitHub releases will no longer contain the Javadoc archives.
[FEATURE] (ktx-actors) Added Action.repeat extension method that allows to repeat an action for the given amount of times.
[FEATURE] (ktx-ashley) Added Engine.get operator to access a chosen EntitySystem.
[FEATURE] (ktx-ashley) Added Engine.getSystem extension method to access a chosen EntitySystem. Throws MissingEntitySystemException in case the system is not added.
[FEATURE] (ktx-ashley) Added Entity.addComponent extension method to create a Component for an existing Entity.
[FEATURE] (ktx-ashley) Added Entity.plusAssign (+=) operator that allows to add an Component to an Entity.
[FEATURE] (ktx-ashley) Added contracts support to EngineEntity.with, Engine.create, Engine.add, Engine.entity add Entity.addComponent. Now their lambda parameters are ensured to be executed exactly once:

// Before:
lateinit var value: Int
engine.add {
  value = 42
}

// Now:
val value: Int
engine.add {
  value = 42
}

[FEATURE] (ktx-assets) Iterable.dispose and Array.dispose extension methods consuming an error handler are now inlined.
[FEATURE] (ktx-box2d) Added contracts support to body, fixture and joint factory methods, as well as FixtureDef.filter This ensures that the configuration lambdas are executed exactly once.
[CHANGE] (ktx-collections) PooledList was removed due to concurrent iteration safety issues. Use standard library lists instead.
[CHANGE] (ktx-collections) - and + operators no longer mutate the collections. Instead, they create a new collection instance and add or removed the selected elements. To modify an existing collection, use new mutating += and -= operators.
[FEATURE] (ktx-freetype) Added contracts support to AssetManager.loadFreeTypeFont, freeTypeFontParameters and FreeTypeFontGenerator.generateFont. This ensures that the font configuration lambdas are executed exactly once.
[FEATURE] (ktx-freetype-async) Added contracts support to AssetStorage.loadFreeTypeFont.
[FEATURE] (ktx-graphics) Added contracts support to Camera.update, Batch.use, ShaderProgram.use, GLFrameBuffer.use and ShapeRenderer.use.
[FEATURE] (ktx-inject) Added contracts support to Context.register.
[CHANGE] (ktx-log) Added contracts to logging methods. Logging methods now might need to be imported explicitly.
[FEATURE] (ktx-preferences) Added contracts support to Preferences.flush.
[FEATURE] (ktx-math) Added +=, +, -= and - operators supporting floats and ints to Vector2 and Vector3.
[CHANGE] (ktx-math) -, !, ++ and -- operators no longer mutate vectors and matrices, returning new instances instead.
[FIX] (ktx-math) Operators documentation regarding mutating of vectors and matrices was updated.
[FEATURE] (ktx-scene2d) scene2d object was added. It supports the entire Scene2D DSL and allows to create root-level widgets.
[FEATURE] (ktx-scene2d) Stage.actors extension method was added. It allows to define actors with Scene2D DSL and adds all top-level actors to the Stage.
[CHANGE] (ktx-scene2d) Root-level actor function was deprecated.
[CHANGE] (ktx-scene2d) Root-level widget factory functions were deprecated. Use scene2d. prefix or Stage.actors to create these widgets. Note that the actors can still be created via standard DSL. See the migration guide in README. This includes:
- stack
- horizontalGroup
- verticalGroup
- container
- splitPane
- scrollPane
- table
- window
- dialog
- buttonGroup
- tree
[CHANGE] (ktx-scene2d) listWidget and selectBox now have a single generic type to improve usability. Their building blocks no longer consume Cell and Node instances.
[CHANGE] (ktx-scene2d) Internal KWidget.appendActor and KGroup.add methods were removed.
[FEATURE] (ktx-scene2d) Added contracts support to widget factory methods and Stage.actors. This ensures that widget configuration lambdas are executed exactly once.
[FEATURE] (ktx-style) Added contracts support to style factory methods and top-level skin functions.
[CHANGE] (ktx-vis) Overhaul of the module.
- ktx-vis now includes and extends the ktx-scene2d module. The majority of APIs are now shared.
- All factory methods for VisUI widgets are now inlined, which can improve the performance of GUI building.
- Factory methods of some VisUI widgets were renamed to avoid clashes with Scene2D methods and better reflect the wrapped widget class names:
  - label: visLabel
  - image: visImage
  - list: visList, visListOf
  - selectBox: visSelectBox, visSelectBoxOf
  - slider: visSlider
  - textArea: visTextArea
  - textField: visTextField
  - validatableTextField: visValidatableTextField
  - textButton: visTextButton
  - imageButton: visImageButton
  - imageTextButton: visImageTextButton
  - radioButton: visRadioButton
  - tree: visTree
  - table: visTable
  - scrollPane: visScrollPane
  - splitPane: visSplitPane
  - addTooltip: visTooltip
  - addTextTooltip: visTextTooltip
- Parental actors including collapsible, dragPane, horizontalCollapsible, visScrollPane, visSplitPane and multiSplitPane now do not require passing widgets to their factory methods. Instead, widgets are either automatically created or can be defined as nested children with the same DSL.
- Inlined functions with lambda parameters, such as widget factories with their building block lambdas, now use Kotlin contracts to ensure that they are executed exactly once.
- DEFAULT_STYLE constant is removed in favor of defaultStyle from ktx-scene2d.
- styleName parameters in factory methods were renamed to style for consistency with ktx-scene2d.
- @VisDsl DSL marker is replaced with @Scene2dDsl marker from ktx-scene2d.
- The sources documentation was greatly expanded.
[FEATURE] (ktx-vis-style) Added contracts support to widget style factory methods.

Known issues:

[BUG] (ktx-box2d) Due to a Kotlin compiler bug, methods with vararg parameters do not support contracts. This includes some polygon, chain and loop factory methods. See this issue. They can still be used and work as expected, but the compiler does not ensure that their lambda parameters are executed exactly once.

1.9.10-b5

[UPDATE] Updated to Kotlin 1.3.71.
[UPDATE] Updated to Kotlin Coroutines 1.3.5.
[UPDATE] Updated to Gradle 5.6.4.
[FEATURE] (ktx-app) Added profiling utilities.
- profile inlined function allows to profile an operation with the libGDX PerformanceCounter.
- PerformanceCounter.profile inlined extension method eases usage of PerformanceCounter API.
- PerformanceCounter.prettyPrint allows to print basic performance data after profiling.
[CHANGE] (ktx-app) LetterboxingViewport moved from ktx-app to ktx-graphics.
[FEATURE] (ktx-ashley) Added Entity.contains (in operator) that checks if an Entity has a Component.
[FEATURE] (ktx-assets-async) Added a new KTX module: coroutines-based asset loading.
- AssetStorage is a non-blocking coroutines-based alternative to libGDX AssetManager.
  - get operator obtains an asset from the storage or throws a MissingAssetException.
  - getOrNull obtains an asset from the storage or return null if the asset is unavailable.
  - getAsync obtains a reference to the asset from the storage as Deferred.
  - load suspends a coroutine until an asset is loaded and returns its instance.
  - loadAsync schedules asynchronous loading of an asset.
  - loadSync blocks the thread until selected asset is loaded.
  - unload schedules asynchronous unloading of an asset.
  - add allows to manually add a loaded asset to AssetManager.
  - dispose unloads all assets from the storage.
  - getLoader and setLoader manage AssetLoader instances used to load assets.
  - isLoaded checks if loading of an asset was finished.
  - contains operator checks if the asset was scheduled for loading or added to the storage.
  - progress allows to check asset loading progress.
  - getReferenceCount returns how many times the asset was loaded or referenced by other assets as a dependency.
  - getDependencies returns a list of dependencies of the selected asset.
  - getAssetDescriptor creates an AssetDescriptor with loading data for the selected asset.
  - getIdentifier creates an Identifier uniquely pointing to an asset of selected type and file path.
- Identifier data class added as an utility to uniquely identify assets by their type and path.
  - Identifier.toAssetDescriptor allows to convert an Identifier to an AssetDescriptor.
- AssetDescriptor.toIdentifier allows to convert an AssetDescriptor to Identifier used to uniquely identify AssetStorage assets.
- LoadingProgress is an internal class used by the AssetStorage to track loading progress.
[FEATURE] (ktx-async) Added RenderingScope factory function for custom scopes using rendering thread dispatcher.
[FEATURE] (ktx-async) newAsyncContext and newSingleThreadAsyncContext now support threadName parameter that allows to set thread name pattern of AsyncExecutor threads.
[FIX] (ktx-async) isOnRenderingThread now behaves consistently regardless of launching coroutine context.
[FEATURE] (ktx-freetype-async) This KTX module is now restored and updated to the new AssetStorage API. There are no public API changes since the last released version.
[FEATURE] (ktx-graphics) Added LetterboxingViewport from ktx-app.
[FEATURE] (ktx-graphics) Added takeScreenshot utility function that allows to save a screenshot of the application.
[FEATURE] (ktx-graphics) Added BitmapFont.center extension method that allows to center text on an object.
[FEATURE] (ktx-graphics) Added Camera utilities.
- center extension method allows to center the camera's position to screen center or the center of the chosen rectangle.
- moveTo extension method allows to move the camera immediately at the chosen target position with optional offset.
- lerpTo extension method allows to move the camera smoothly to the chosen target position with optional offset.
- update inlined extension method allows to change camera state with automatic Camera.update call.
[FEATURE] (ktx-math) Added lerp and interpolate extension functions for Float ranges.
[FEATURE] (ktx-preferences) Added a new KTX module: Preferences API extensions.
- Added set operators for String, Int, Float, Double, Long, Boolean, Pair<String, Any> and Any
- Added get operator which automatically determines preference type and retrieves them with the correct method.
- get and set will automatically attempt to (de)serialize non-basic preferences to and from JSON.
- set(String, Double) is deprecated, since the libGDX Preferences do not support doubles.
- Added flush inlined extension method that executes a lambda and automatically calls Preferences.flush.
[CHANGE] (ktx-scene2d) Improved typing support for Tree.Node widgets. Since libGDX 1.9.10, Tree.Node is a generic class, but KTX KNode remained non-generic until now. Type of stored actors must now be specified for KNode variables, but thanks to that actors from KNode instances are now correctly typed and easier to handle. This required minor internal changes - KWidget.storeActor is now generic.
[FEATURE] (ktx-vis) Added image (VisImage) factory methods consuming Texture, TextureRegion and NinePatch.

1.9.10-b4

[FEATURE] (ktx-actors) Added onTouchDown, onTouchUp and onTouchEvent extension methods that allow to attach ClickListener instances to actors.
[CHANGE] (ktx-collections) Array.removeAll and retainAll now return a boolean if any elements were removed.
[CHANGE] (ktx-collections) Array.transfer is now less strict about typing.
[FEATURE] (ktx-math) Added Kotlin ranges extensions that simplify creating ranges and rolling random numbers:
- Int.amid, Float.amid;
- +, -, * and / for ranges;
- ClosedRange<Float>.random, IntRange.random;
- ClosedRange<Float>.randomGaussian;
- ClosedRange<Float>.randomTriangular.
[FEATURE] (ktx-tiled) Added a new KTX module: Tiled API extensions.
- Added contains (in) and set ([]) operators support to MapProperties.
- Added extension methods that simplify properties extraction from MapLayer, MapObject, TiledMap, TiledMapTile and TiledMapTileSet:
  - property
  - propertyOrNull
  - containsProperty
- Added shape extension field to MapObject.
- Added extension fields that ease extraction of basic properties from TiledMap and MapObject.

1.9.10-b3

[UPDATE] Updated to Kotlin 1.3.61.
[UPDATE] Updated to Kotlin Coroutines 1.3.3.
[FEATURE] (ktx-assets) Added AssetGroup abstract class that allows to manage groups of assets.
[FEATURE] (ktx-collections) Added removeAll, retainAll and transfer extensions to libGDX Array using lambda predicates to modify the array in-place.
[CHANGE] (ktx-collections) PooledList now implements MutableIterable.
[FEATURE] (ktx-graphics) Added Batch.begin extension methods that automatically set projection matrix from a Camera or Matrix4.
[FEATURE] (ktx-style) Added Skin extension methods with reified resource types: optional, add, remove, has and getAll.
[FEATURE] (ktx-style) The overloaded += operator can now be used to add "default" resources to Skin.
[FEATURE] (ktx-json) Added JsonSerializer and ReadOnlyJsonSerializer adapters to facilitate writing custom serializers.
[FEATURE] (ktx-json) Added readOnlySerializer() factory functions to simplify creation of ReadOnlyJsonSerializer.

1.9.10-b2

[UPDATE] Updated to Kotlin 1.3.50.
[UPDATE] Updated to Kotlin Coroutines 1.3.0.
[UPDATE] Updated to Gradle 5.6.1.
[CHANGE] (ktx-actors) Action.parallelTo changed to Action.along.
[CHANGE] (ktx-actors) Action.along (formerly Action.parallelTo) and Action.then no longer unwrap the second action.
[CHANGE] (ktx-actors)ParallelAction.along (formerly ParallelAction.parallelTo) and SequenceAction.then simply add the second action to the group without unwrapping.
[FEATURE] (ktx-actors) Added / operator to Action, which performs the non-mutating version of along, wrapping the caller and argument in a new ParallelAction.
[CHANGE] (ktx-actors) ParallelAction.plus() and SequenceAction.plus() no longer unwrap their components.
[FIX] (ktx-actors) along, then, + and / Action extension methods now properly differentiate between SequenceAction and ParallelAction, taking their inheritance into account.
[CHANGE] (ktx-box2d) Added disposeOfShape parameters to fixture extension methods of Body and BodyDefinition. Setting these values to true will cause the fixture shapes to be immediately disposed of after Fixture construction.
[FIX] (ktx-box2d) Removed memory leak caused by undisposed shapes.
[FEATURE] (ktx-graphics) Batch.use extension methods now accept Matrix4 and Camera to update the batch's projection matrix before rendering.

1.9.10-b1

[UPDATE] Updated libGDX to 1.9.10.
[UPDATE] Updated to Kotlin 1.3.41.
[UPDATE] Updated to Kotlin Coroutines 1.3.0-RC2.
[UPDATE] Updated VisUI to 1.4.4.
[UPDATE] Updated to Gradle 5.5.1.
[CHANGE] (ktx-app) clearScreen now also clears depth buffer to support 3D applications.
[FEATURE] (ktx-json) Added a new KTX module with the goal of improving libGDX Json API: ktx-json. The following extension methods were added to avoid passing Java class instances:
- fromJson
- addClassTag
- getTag
- setElementType
- setSerializer
- readValue
[FEATURE] (ktx-graphics) Added GLFrameBuffer.use to allow safe omission of the begin() and end() calls.

1.9.9-b2

[UPDATE] Updated to Kotlin 1.3.31.
[UPDATE] Updated to Kotlin Coroutines 1.2.1.
[FEATURE] (ktx-assets) Added TextAssetLoader that can be registered in an AssetManager to load text files asynchronously.
[FEATURE] (ktx-style) Added Skin.get extension method that allows to pass enum instances as style names.
[CHANGE] (ktx-style) Skin.get extension method are no longer infix.
[CHANGE] (ktx-style) Skin.get now has accepts default parameter equal to the default style name.

1.9.9-b1

[UPDATE] Updated libGDX to 1.9.9.
[UPDATE] Updated to Kotlin 1.3.20.
[UPDATE] Updated to Kotlin Coroutines 1.1.1.
[UPDATE] Updated VisUI to 1.4.2.
[UPDATE] Updated to Gradle 5.0.
[CHANGE] (ktx-actors) Replaced Stage and Group extension operator methods plus and minus with plusAssign and minusAssign to avoid mutating the objects with addition and subtraction operators.

// Adding an actor to a Stage/Group - before:
stage + actor
group + actor

// Now:
stage += actor
group += actor

[CHANGE] (ktx-actors) Replaced Stage and Actor extension operator methods plus and minus with plusAssign and minusAssign to avoid mutating the objects with addition and subtraction operators.

// Adding an action to a Stage/Actor - before:
stage + action
actor + action

// Now:
stage += action
actor += action

[CHANGE] (ktx-actors) SequenceAction.then was removed. Using the method on a sequence no longer mutates it for consistency with Action.then. then now unwraps actors from passed SequenceActions.
[CHANGE] (ktx-actors) ParallelAction.parallelTo was removed. Using the method on a ParallelAction no longer mutates it for consistency with Action.parallelTo. parallelTo now unwraps actors from passed ParallelActions.
[CHANGE] (ktx-async) Overhaul of the ktx-async module.
- KtxAsync is now the main coroutines scope that should be used instead of the GlobalScope.
- Dispatchers.KTX can be used to access a coroutines dispatcher that executes tasks on the main rendering thread.
- AsyncExecutorDispatcher can be used to wrap libGDX AsyncExecutor to execute tasks asynchronously.
- newSingleThreadAsyncContext allows to create an AsyncExecutorDispatcher with a single thread.
- newAsyncContext allows to create an AsyncExecutorDispatcher with the given max amount of threads.
- onRenderingThread suspends the coroutine to execute a task on the main rendering thread and return its result.
- isOnRenderingThread allows to check whether the coroutine is executed on the main rendering thread.
- skipFrame attempts to suspend the coroutine for at least one rendering frame.
- httpRequest allows to perform an asynchronous HTTP request.
- schedule and interval functions simplify libGDX Timer API usage.
- AssetStorage and associated asset loading utilities were temporarily removed. They will be added to a separate module.
- Asynchronous tests were significantly simplified.
- Assume that other utilities were either removed or integrated with the listed utilities.
[CHANGE] (ktx-freetype-async) The module is temporarily disabled due to the removal of AssetStorage.
[FEATURE] (ktx-actors) Added + operator to create sequence of actions (an alternative syntax to then).
[FEATURE] (ktx-actors) Added += operators to SequenceAction and ParallelAction to ease adding new actions to these action groups.
[FEATURE] (ktx-actors) Added stage factory method that uses named and default parameters to ease Stage creation.
[FEATURE] (ktx-graphics) Added ShapeRenderer.use to allow safe omission of the begin() and end() calls.
[FEATURE] (ktx-math) Added ImmutableVector2, an immutable equivalent to Vector2.

1.9.8-b5

[UPDATE] Updated to Kotlin 1.2.70.
[UPDATE] Updated to Kotlin Coroutines 0.26.1.
[UPDATE] Updated to Gradle 4.10.2.
[FIX] (ktx-ashley) Component classes without a default no-arg constructors could not have been initiated by the Ashley engine. This is still the case, but now an exception with a meaningful message is thrown.

1.9.8-b4

[UPDATE] Updated to Kotlin 1.2.51.
[UPDATE] Updated to Kotlin Coroutines 0.24.0.
[UPDATE] Updated to Dokka 0.9.17.
[UPDATE] Updated to Gradle 4.9.
[CHANGE] (ktx-async) KtxAsync.asynchronous is now inlined. The action lambda is cross-inlined to avoid excessive object creation.

1.9.8-b3

[UPDATE] Updated to Kotlin 1.2.41.
[UPDATE] Updated to Gradle 4.7.
[FEATURE] (ktx-graphics) Added new graphics module with the following ShapeRenderer extension methods:
- arc
- box
- circle
- cone
- ellipse
- rect
- rectLine
- rotate
- scale
- translate
- triangle
[CHANGE] (ktx-app, ktx-graphics) Utility functions moved from ktx-app to the new ktx-graphics:
- color
- Color.copy
- Batch.use
- ShaderProgram.use
[MISC] Removed migration guides from very old versions. If you are in a process of migrating an existing application to the latest KTX and facing any errors, see README files in 1.9.8-b2 tag.

1.9.8-b2

[UPDATE] Updated to Kotlin 1.2.30.
[UPDATE] Updated to Kotlin Coroutines 0.22.5.
[UPDATE] Updated to Dokka 0.9.16.
[UPDATE] Updated to Gradle 4.6.
[FEATURE] (ktx-math) dot and x infix functions added to Vector2 and Vector3 allow to calculate dot products and cross products of two vectors respectively.
[FEATURE] (ktx-box2d) Initiation blocks of Body in World.body extension method is now optional thanks to default lambda parameters in inlined functions.
[FEATURE] (ktx-box2d) World.query extension method allowing to execute AABB query with idiomatic Kotlin.
[CHANGE] (ktx-math) Binary operators of Vector2, Vector3, Matrix3 and Matrix4 (+, -, *, /) no longer modify the first vector or matrix. Instead, they create new instances of vectors or matrices that store the operation result. Use the assign operators (+=, -=, *=, /=) instead to avoid creating new instances.
[CHANGE] (ktx-math) New mutating assign operators (+=, -=, *=, /=) were added to Vector2, Vector3, Matrix3 and Matrix4.
[CHANGE] (ktx-math) Parameters of matrix vector multiplication operators are switched. vector * matrix does not exist anymore and now is available as matrix * vector.
[CHANGE] (ktx-math) Operators of Matrix3 to left-multiply a Vector3 were removed.

1.9.8-b1

[UPDATE] Updated to libGDX 1.9.8.
[UPDATE] Updated to Kotlin 1.2.21.
[UPDATE] Updated to Kotlin Coroutines 0.22.
[UPDATE] Updated to Gradle 4.4.
[UPDATE] Updated to VisUI 1.4.0.
[CHANGE] (ktx-scene2d) Duplicate functions in Scene2D building DSL were removed thanks to optional default lambda parameters in inlined functions (added in Kotlin 1.2). Due to the limitation in inlined methods, there used to be two inlined methods for each actor to support syntax both with braces (init block) and without. Now there is just one factory method supporting both syntax variants per widget. This should not affect most application, but might require Kotlin 1.2 usage.
[CHANGE] (ktx-ashley) Default functional parameters were added to create, entity and with, simplifying the implementation and making configuration blocks optional.
[CHANGE] (ktx-inject) Parameters of bindSingleton consuming multiple classes have been swapped to be more compatible with the bind functions.
[CHANGE] (ktx-inject) bind and bindSingleton methods consuming multiple classes now take KClass as parameters instead of Class, so now you can use YourType::class instead of more verbose YourType::class.java.
[FEATURE] (ktx-style) Initiation blocks of Skin and Scene2D actor styles are now optional.
[FEATURE] (ktx-vis-style) Initiation blocks of VisUI actor styles are now optional.
[FEATURE] (ktx-box2d) Initiation blocks of fixtures and joints are now optional thanks to default lambda parameters in inlined functions.

fun createCircle(body: Body) {
    // Before - would not compile without additional braces:
    body.circle(radius = 2f) {}
    
    // Now - braces are optional (lambda parameter defaults to no-op):
    body.circle(radius = 2f)
}

[FEATURE] (ktx-inject) Add higher-order function parameters for bindSingleton to allow the use of lambda expressions.
[FEATURE] (ktx-freetype) Implemented ktx-freetype module.
- AssetManager.registerFreeTypeFontLoaders allows to register all loaders necessary to handle FreeType font assets.
- AssetManager.loadFreeTypeFont provides Kotlin DSL for loading of FreeType fonts.
- freeTypeFontParameters function provides Kotlin DSL for building FreeType font loading parameters.
- FreeTypeFontGenerator.generateFont extension function allows to generate BitmapFont with Kotlin DSL.
[FEATURE] (ktx-freetype-async) Implemented ktx-freetype-async module.
- AssetStorage.registerFreeTypeFontLoaders allows to register all loaders necessary to handle FreeType font assets.
- AssetStorage.loadFreeTypeFont provides Kotlin DSL for asynchronous loading of FreeType fonts.
[FIX] (ktx-box2d) As libGDX 1.9.8 fixes its ChainShape implementation, ChainShape utilities are supported once again.

1.9.7-b1

[UPDATE] Updated libGDX to 1.9.7.
[UPDATE] Updated to Kotlin 1.1.51.
[UPDATE] Updated to Kotlin Coroutines 0.19.3.
[UPDATE] Updated to Gradle 4.3.
[BUG] (ktx-box2d) ChainShape does not work correctly in libGDX 1.9.7, and hence is not supported in KTX. This might break existing applications.

1.9.6-b7

[UPDATE] Updated to Kotlin 1.1.3-2.
[UPDATE] Updated to Kotlin Coroutines 0.17.
[UPDATE] Updated to Gradle 4.0.2.
[CHANGE] (ktx-app) KotlinApplication was removed. Use KtxApplicationAdapter or KtxGame instead.
[CHANGE] (ktx-app) KtxGame no longer supports fixed rendering time steps.
[FEATURE] (ktx-app) Clearing screen on rendering is now optional when using KtxGame. Change clearScreen parameter to false to turn off screen clearing.
[FEATURE] (ktx-box2d) World.rayCast extension methods that allow creating ray-cast callbacks with the Kotlin lambda syntax. KtxRayCastCallback alias added to ease implementation of this utility.
[FEATURE] (ktx-box2d) Added RayCast object with constants that can be returned by the custom RayCastCallback implementations.

1.9.6-b6

[UPDATE] Updated to Gradle 4.0.
[UPDATE] Updated to Ashley 1.7.3.
[CHANGE] (ktx-ashley) Extensions updated to support Engine base class additionally to the PooledEngine.
- Engine.add and Engine.entity extension methods to replace PooledEngine equivalents.
- Changed PooledEntity to EngineEntity, wrapping Entity and providing access to Engine API.
[CHANGE] (ktx-async) TextAssetLoader now extends AsynchronousAssetLoader instead of SynchronousAssetLoader.
[FIX] (ktx-async) AssetStorage now correctly handles SynchronousAssetLoader instances on the main rendering thread.

1.9.6-b5

[UPDATE] Updated to Kotlin 1.1.2-5.
[UPDATE] Updated to Kotlin Coroutines 0.16.
[FEATURE] (ktx-actors) onChange, onClick, onKey, onKeyDown, onKeyUp, onScrollFocus and onKeyboardFocus factory methods for EventListener instances were added. Contrary to existing factory methods, these use minimal set of parameters to make listeners creation as concise as possible.
[CHANGE] (ktx-actors) Existing onChange, onClick, onKey, onKeyDown, onKeyUp, onScrollFocus and onKeyboardFocus factory methods where renamed to onChangeEvent, onClickEvent, onKeyEvent, onKeyDownEvent, onKeyUpEvent, onScrollFocusEvent and onKeyboardFocusEvent respectively. Their excessive amount of parameters, useful only on rare occasions, led to unnecessary boilerplate during listeners creation. See ktx-actors file documentation for migration guide.
[FEATURE] (ktx-ashley) new KTX module with Ashley entity component system utilities: ktx-ashley.
- PooledEngine.add and PooledEngine.entity extension methods.
- PooledEntity wrapping Entity and providing access to PooledEngine API.
- mapperFor factory method that allows to create ComponentMapper instances.
- Accessors for Entity objects using ComponentMappers: get, has, hasNot, remove.
- DSL methods for constructing Family builders with KClass instances: oneOf, allOf, exclude.

1.9.6-b4

[FEATURE] (ktx-app) Added KtxGame: KTX equivalent of libGDX Game.
[FEATURE] (ktx-app) Added KtxScreen: adapter of the libGDX Screen interface making all methods optional to implement.
[FEATURE] (ktx-app) Added emptyScreen utility method returning a no-op implementation of Screen.
[FEATURE] (ktx-collections) Added map, filter and flatten extension methods that return libGDX collections.
[FEATURE] (ktx-collections) PooledList now properly implements hashCode and equals.
[FEATURE] (ktx-inject) Context now implements Disposable and allows to dispose of all registered singletons and providers.
[FEATURE] (ktx-inject) Added Context.remove and removeProvider methods. Now providers for particular types can be removed without clearing the whole context.
[FEATURE] (ktx-inject) getProvider, setProvider and clear methods of Context are now open and can be overridden.

1.9.6-b3

[UPDATE] Updated to Kotlin 1.1.2-3.
[UPDATE] Updated to Kotlin Coroutines 0.15.
[CHANGE] (ktx-assets) Static AssetManager instance container - Assets - was removed. All top level functions depending on the global AssetManager were removed.
[FEATURE] (ktx-assets) Added FileType.getResolver extension method creating FileHandleResolver instances.
[FEATURE] (ktx-assets) Added FileHandleResolver.withPrefix extension method decorating resolvers with PrefixFileHandleResolver.
[FEATURE] (ktx-assets) Added FileHandleResolver.forResolutions extension method decorating resolvers with ResolutionFileResolver.
[FEATURE] (ktx-assets) Added resolution function constructing ResolutionFileResolver.Resolution instances.
[FEATURE] (ktx-async) Added AssetStorage: a lightweight coroutines-based alternative to AssetManager.
[FEATURE] (ktx-box2d) Implemented a new KTX module with Box2D physics engine utilities: ktx-box2d.
- world factory method constructing World instances.
- World.body extension method providing type-safe builder DSL for Body instances.
- FixtureDef builder methods supporting all shapes (CircleShape, PolygonShape, ChainShape, EdgeShape).
- FixtureDef.filder extension methods simplifying Filter properties setup.
- BodyDefinition is a BodyDef extension providing Body building DSL. Used internally by World.body.
- FixtureDefinition is a FixtureDef extension providing Fixture building DSL. Used internally by BodyDefinition.
- fixture, circle, box, polygon, chain, loop and edge extension Fixture building methods added to Body.
- earthGravity property allowing to set World gravity roughly matching Earth's gravity.
- onCreate callbacks in BodyDefinition and FixtureDefinition giving access to built Body and Fixture instances in building blocks.
- Body extension methods that ease creation of Joint instances between 2 bodies: jointWith, gearJointWith, ropeJointWith, weldJointWith, motorJointWith, mouseJointWith, wheelJointWith, pulleyJointWith, distanceJointWith, frictionJointWith, revoluteJointWith, prismaticJointWith.
[CHANGE] (ktx-i18n) Static I18NBundle instance container - I18n - was removed.
[CHANGE] (ktx-i18n) Top level nls functions were removed.
[FEATURE] (ktx-i18n) nls property and method added to BundleLine for extra readability.
[CHANGE] (ktx-inject) Static Context instance container was removed. All top level functions depending on the global Context were removed.
[FEATURE] (ktx-inject) Context.register builder method added to ease context initiation process.

1.9.6-b2

[UPDATE] Updated to Kotlin 1.1.1.
[UPDATE] Updated to VisUI 1.3.0.
[FEATURE] (ktx-actors) Added inlined txt extension properties to Label and TextButton widgets.
[FEATURE] (ktx-actors) Added KtxInputListener: an InputListener extension with parameter types improvements.
[FEATURE] (ktx-actors) alpha extension properties of Actor and Stage are now inlined.
[FEATURE] (ktx-app) Added KtxApplicationAdapter interface which makes implementing all of ApplicationListener methods optional.
[FEATURE] (ktx-app) Added KtxInputAdapter interface which makes implementing all of InputProcessor methods optional.
[FEATURE] (ktx-app) Added use inlined methods to Batch and ShaderProgram, allowing to omit begin() and end() calls.
[FEATURE] (ktx-app) Added color factory method to allow constructing libGDX Color instances with named parameters.
[FEATURE] (ktx-app) Added Color.copy extension method that allows to copy Color instances with optional overriding of chosen values.
[CHANGE] (ktx-app) KotlinApplication#timeSinceLastRender now has a protected default getter.
[CHANGE] (ktx-assets) Static AssetManager instance container was deprecated. Static access to AssetManager will be removed in the next release.
[FEATURE] (ktx-assets) Added load, loadAsset, loadOnDemand, getAsset, unload and unloadSafety extension methods to AssetManager to provide an alternative to equivalent utility functions using static manager instance.
[FEATURE] (ktx-assets) Added getLoader and setLoader extension methods to AssetManager for AssetLoader handling.
[FEATURE] (ktx-async) Implemented a new KTX module with multi-threaded operations utilities: ktx-async.
- Implemented coroutines context using libGDX threading model: KtxAsync. It resumes suspending operations on the main rendering thread with Gdx.app.postRunnable utility. It has to be initiated on the main thread with enableKtxCoroutines.
- Added utility ktxAsync function which launches non-blocking coroutine using KtxAsync context.
- Added skipFrame method that suspends the coroutine and resumes it on the next frame using Gdx.app.postRunnable.
- Added delay method that offers non-blocking coroutine suspensions for the given period of time.
- Added httpRequest method that performs asynchronous suspending HTTP request using libGDX Net API.
- Added asynchronous method, which allows to perform suspending operations on a separate thread.
- schedule and interval utility methods added to ease the use of com.badlogic.gdx.utils.Timer API.
- Added HttpRequestResult: a thread-safe HttpResponse wrapper that addresses libgdx#4700.
[FEATURE] (ktx-collections) Added sortDescending, sortBy and sortByDescending utility methods to libGDX Array.
[FEATURE] (ktx-collections) Added type aliases to libGDX collections to avoid name collisions with standard library:
- GdxArray: com.badlogic.gdx.utils.Array
- GdxIntArray: com.badlogic.gdx.utils.IntArray
- GdxFloatArray: com.badlogic.gdx.utils.FloatArray
- GdxBooleanArray: com.badlogic.gdx.utils.BooleanArray
- GdxCharArray: com.badlogic.gdx.utils.CharArray
- GdxLongArray: com.badlogic.gdx.utils.LongArray
- GdxShortArray: com.badlogic.gdx.utils.ShortArray
- GdxSet: com.badlogic.gdx.utils.ObjectSet
- GdxMap: com.badlogic.gdx.utils.ObjectMap
- GdxList: ktx.collections.PooledList
[FEATURE] (ktx-collections) lastIndex extension properties of libGDX arrays are now inlined.
[FEATURE] (ktx-collections) Added component1() and component2() operator extension methods to Entry classes of libGDX maps to support destructing syntax and simplify iteration.
[CHANGE] (ktx-i18n) Static I18NBundle instance container was deprecated. Static access to I18NBundle will be removed in the next release.
[CHANGE] (ktx-inject) Static Context instance container was deprecated. Static access to Context will be removed in the next release.
[FEATURE] (ktx-scene2d, ktx-vis) inCell extension property added to Table children. Now you can easily access Cell instance outside of the actors' building blocks.
[FEATURE] (ktx-scene2d, ktx-vis) inNode extension property added to Tree children. Now you can easily access Node instance outside of the actors' building blocks.
[FEATURE] (ktx-scene2d, ktx-vis) fluent cell extension method added to Table children, allowing to configure Cell properties outside of actors' building blocks.
[FEATURE] (ktx-scene2d, ktx-vis) fluent node extension method added to Tree children, allowing to configure Node properties outside of actors' building blocks.
[FEATURE] (ktx-scene2d, ktx-vis) Resolved DSL scoping issues with Kotlin 1.1 @DslMarker API.
[CHANGE] (ktx-scene2d, ktx-vis) Due to @DslMarker introduction, implicit access to parental widgets is no longer possible in children building blocks. See ktx-scene2d or ktx-vis documentation for more info on the migration.
[CHANGE] (ktx-scene2d) KNode.invoke extension method was moved directly to KNode API and no longer has to be imported.
[FEATURE] (ktx-style) Skin instance is now available under lambda parameter of skin method init blocks.
[FEATURE] (ktx-style, ktx-style-vis) Resolved DSL scoping issues with Kotlin 1.1 @DslMarker API.
[CHANGE] (ktx-style, ktx-style-vis) Due to @DslMarker introduction, implicit access to Skin instance is no longer possible. See ktx-style documentation for more info on the migration.
[FEATURE] (ktx-vis) Added support for HorizontalCollapsibleWidget: horizontalCollapsible builder methods added to all parental actors.
[FEATURE] (ktx-vis) Added support for VisTree building using type-safe API.
[CHANGE] (ktx-vis) Cells and nodes are now available as lambda parameters. See ktx-vis documentation for migration guide.

1.9.6-b1

[UPDATE] Updated to libGDX 1.9.6.
[UPDATE] Updated to Kotlin 1.1.0.
[FEATURE] (ktx-collections) Added null-safe size() method to libGDX IntArray, FloatArray and BooleanArray collections.
[FEATURE] (ktx-collections) Added null-safe extension property lastIndex to libGDX ArrayList equivalents: Array, IntArray, FloatArray and BooleanArray.

1.9.5-b1

[UPDATE] Updated to libGDX 1.9.5.

1.9.4-b2

[FEATURE] (ktx-actors) Added Actor.onKeyUp and Actor.onKeyDown extension methods that attach EventListener implementations listening to InputEvent instances.
[FEATURE] (ktx-app) Implemented ktx-app module.
- KotlinApplication is an ApplicationAdapter equivalent with fixed rendering time step.
- clearScreen utility function allows to easily clear the application screen.
- LetterboxingViewport is a Viewport implementation that combines ScreenViewport and FitViewport behaviors.
[FEATURE] (ktx-vis) Added ListViewStyle support to ListView factory methods.
[FEATURE] (ktx-vis) Added top level tab() method.
[FEATURE] (ktx-vis-style) Added ListViewStyle factory method: listView.
[FIX] (ktx-scene2d) Added missing TextButton factory methods.

1.9.4-b1

[UPDATE] Updated to libGDX 1.9.4.
[FEATURE] (ktx-actors) Implemented ktx-actors module.
- isShown, centerPosition, setKeyBoardFocus and setScrollFocus extension methods for Actor.
- contains operator extension method of Group and Stage supporting actor in group syntax.
- + and - operator for adding actors to Group and Stage.
- alpha extension field for Actor and Stage.
- Lambda consuming onChange, onClick, onKey, onScrollFocus and onKeyboardFocus extension methods for Actor, allowing to quickly define event listeners.
- + and - operator extension methods can be used to add Action instances to a Stage.
- Action.then infix extension method can be used to chain actions into sequences.
- Action.repeatForever wraps an action in a RepeatAction without a repetitions limit.
[FEATURE] (ktx-assets) Implemented ktx-assets module.
- Assets.manager global AssetManager instance.
  - load function can be used to load assets asynchronously via the global AssetManager instance. loadOnDemand can be used to load assets immediately in a blocking manner. unload can unload the assets.
  - asset function can be used to access loaded assets from the global AssetManager instance.
  - isLoaded allows to check if an asset has been loaded by the global AssetManager.
- disposeSafely and lambda consuming dispose were added to Disposable.
- Iterable and Array instances storing Disposable elements can now be disposed.
- Exception.ignore extension method was added for explicit no-op handling of exceptions.
- Pool.invoke operator extension method was added as an alternative to Pool.obtain.
- Pool.invoke(T) operator extension method was added as an alternative to Pool.free(T).
- Lambda consuming pool factory function was added.
- toClasspathFile, toInternalFile, toLocalFile, toExternalFile and toAbsoluteFile converter methods added to FileHandle.
- file factory function was added.
[FEATURE] (ktx-collections) Implemented ktx-collections module.
- Array factory function gdxArrayOf and converter method toGdxArray.
- Array extensions including: isEmpty, isNotEmpty, size, +, -, getLast, removeLast, get, addAll, removeAll, iterate.
- ObjectSet factory function gdxSetOf and converter method toGdxSet.
- ObjectSet extensions including: isEmpty, isNotEmpty, size, +, -, addAll, removeAll, iterate.
- ObjectMap factory function gdxMapOf and IdentityMap factory gdxIdentityMapOf.
- Maps extensions including: isEmpty, isNotEmpty, size, contains (in), set ([]), iterate, toGdxSet.
- Lambda consuming Iterable.toGdxMap allows to convert any collection to a ObjectMap.
- PooledList collection as an alternative to PooledLinkedList. Includes gdxListOf and toGdxList factory methods.
[FEATURE] (ktx-i18n) Implemented ktx-i18n module.
- I18n.defaultBundle global I18NBundle instance loaded by I18n.load.
- addListener, removeListener and clearListeners of I18n allow to handle the lifecycle of the global I18NBundle.
- nls functions allow to access global I18NBundle.
- I18NBundle.get operator function improves access to the bundle lines.
- BundleLine is an interface designed to be implemented by enums that match bundle line names stored in an i18n properties file.
[FEATURE] (ktx-inject) Implemented ktx-inject module.
- Context is the core of the dependency injection framework, storing the registered singletons and providers.
- Global Context instance is available via ContextContainer.defaultContext.
- inject and provider functions allow to extract instances and providers of selected type from the global Context.
- register allows to add singletons and providers to the global Context.
[FEATURE] (ktx-log) Implemented ktx-log module.
- debug, info and error functions allow to log data with the libGDX logging API.
- logger factory function provides instances of the KTX Logger that wraps libGDX logging API.
[FEATURE] (ktx-math) Implemented ktx-math module.
- vec2, vec3, mat3 and mat4 factory methods for Vector2, Vector3, Matrix3 and Matrix4 respectively.
- +, -, *, /, -, ++, --, <, >, <=, >= operators support for Vector2 and Vector3.
- +, -, *, !, - operators support for Matrix3 and Matrix4.
- Vector2, Vector3, Matrix3 and Matrix4 are now decomposable into 2, 3, 9 and 16 components respectively.
[FEATURE] (ktx-scene2d) Implemented ktx-scene2d module.
- Added DSL for constructing complex Scene2D widgets.
  - Factory methods for parental actors: buttonTable, container, dialog, horizontalGroup, scrollPane, splitPane, stack, table, tree, verticalGroup and window.
  - Factory methods for secondary parental actors: button, checkBox, imageButton and imageTextButton.
  - Factory methods for child actors: image, label, list, progressBar, selectBox, slider, textArea, textField and touchpad.
[FEATURE] (ktx-style) Implemented ktx-style module.
- skin factory methods producing Skin instances.
- get operator infix function for quick access of Skin resources.
- set operator function for quick modification of Skin resources.
- Factory methods for styles of Scene2D widgets: color, button, checkBox, imageButton, imageTextButton, label, list, progressBar, selectBox, slider, splitPane, textButton, textField, textTooltip, touchpad, tree, window.
[FEATURE] (ktx-vis) Implemented ktx-vis module.
- Added DSL for constructing complex VisUI widgets.
[FEATURE] (ktx-vis-style) Implemented ktx-vis-style module.
- Factory methods for styles of VisUI widgets.

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