Full Code of thomasnield/RxKotlinFX for AI

Repository: thomasnield/RxKotlinFX
Branch: 2.x
Commit: ad05b7abe6e6
Files: 14
Total size: 67.1 KB

Directory structure:
gitextract_sf6a36ys/

├── .gitignore
├── LICENSE.txt
├── README.md
├── build.gradle
├── gradle/
│   └── wrapper/
│       ├── gradle-wrapper.jar
│       └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
└── src/
    ├── main/
    │   └── kotlin/
    │       └── com/
    │           └── github/
    │               └── thomasnield/
    │                   └── rxkotlinfx/
    │                       ├── Nodes.kt
    │                       ├── Observables.kt
    │                       ├── Operators.kt
    │                       ├── Subscribers.kt
    │                       └── Util.kt
    └── test/
        └── kotlin/
            └── com/
                └── github/
                    └── thomasnield/
                        └── rxkotlinfx/
                            └── OperatorsTest.kt

================================================
FILE CONTENTS
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================================================
FILE: .gitignore
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.gradle/
build/
*.iml
*.class
*.prefs
*.classpath
.project
.idea/
gradle.properties
secring.gpg


================================================
FILE: LICENSE.txt
================================================
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================================================
FILE: README.md
================================================

![](https://camo.githubusercontent.com/78eeb41c5378ae03cf0d23e71c3e0c9e61b0d984/687474703a2f2f692e696d6775722e636f6d2f7837726d586b652e706e67)

# UNSUPPORTED, PLEASE FORK AND SUPPORT

# RxKotlinFX
Kotlin extensions to the [RxJavaFX](https://github.com/ReactiveX/RxJavaFX) library. This framework works especially well with [TornadoFX](https://github.com/edvin/tornadofx). See a fully functional demo [here!](https://github.com/thomasnield/rxkotlinfx-tornadofx-demo)

## Documentation
[Learning RxJava with JavaFX](https://www.gitbook.com/book/thomasnield/rxjavafx-guide/details)


## Binaries

Binaries and dependency information for Maven, Ivy, Gradle and others can be found at [http://search.maven.org](http://search.maven.org/#search%7Cga%7C1%7Cio.reactivex.rxjavafx).

Example for Maven:

```xml
<dependency>
    <groupId>com.github.thomasnield</groupId>
    <artifactId>rxkotlinfx</artifactId>
    <version>x.y.z</version>
</dependency>
```

Gradle: 

```groovy 
repositories {
    mavenCentral()
}
dependencies {
    compile 'com.github.thomasnield:rxkotlinfx:x.y.z'
}
```
## Contributing
Feel free to contribute and help streamline a pragmatic UI stack with Kotlin, RxJava, and JavaFX. Speaking of stacks, this project may be used in conjunction with [TornadoFX](https://github.com/edvin/tornadofx) and [RxKotlin](https://github.com/ReactiveX/RxKotlin). Please make sure no extension naming conventions conflict with these two other libraries :)

## Features

RxKotlinFX is the convergence of interoperability between [RxJava](https://github.com/ReactiveX/RxJava), [JavaFX](http://docs.oracle.com/javase/8/javase-clienttechnologies.htm), and [Kotlin](https://kotlinlang.org/). 

![](http://i.imgur.com/Bhh5CX4.png)

RxKotlinFX contains Kotlin extensions to [RxJavaFX](https://github.com/ReactiveX/RxJavaFX) as well as additional `Observable` operators specific to JavaFX. It also is in exporatory stages to add helpful `Node` extension functions that return Observables. This exploration is inspired by the JavaFX/Kotlin interop project [TornadoFX](https://github.com/edvin/tornadofx). Where TornadoFX handles layouts, node extensions, DI, and other JavaFX/Kotlin interoperations, this library will seek to integrate RxJava with JavaFX in the same spirit using Kotlin. The vision is to add useful extensions that put `Observable` streams as properties and functions on JavaFX components, especially where `ObservableValue` properties are not readily available. 

### RxJavaFX Extensions
The core API implements [RxJavaFX](https://github.com/ReactiveX/RxJavaFX) static factories as extension functions. 

|Target Type|Extension Function|Description|
|---|---|---
|Observable&lt;T>|toBinding()|Subscribes the `Observable<T>` to a JavaFX `Binding` implementation. Calling `dispose()` will unsubscribe from the `Observable<T>`
|Observable&lt;T>|toLazyBinding()|Subscribes the `Observable<T>` to a lazy JavaFX `Binding` implementation, delaying subscription until a value is needed. Calling `dispose()` will unsubscribe from the `Observable<T>`
|Property&lt;T>|bind(observable: Observable&lt;T>)|Binds a `Property<T>` to the emissions of an `Observable<T>`, and returns the `Binding`
|Binding&lt;T>|addTo(compositeBinding: CompositeBinding)|Adds the `Binding` to a `CompositeBinding`, and returns the `Binding`
|ObservableValue&lt;T>|toObservable()|Turns a JavaFX `ObservableValue<T>` into an RxJava `Observable<T>` that emits the latest value
|ObservableValue&lt;T>|toObservableChanges()|Turns a JavaFX `ObservableValue<T>` into an RxJava `Observable<Change<T>>` that emits the old value and new value as a pair
|Dialog&lt;T>|toObservable&lt;T>|Returns an `Observable<T>` that emits the given result of `Dialog<T>`. Will be empty if no response. 
|Node, Window,  Scene|events(eventType: EventType<T>)| Creates an `Observable` emitting events of the given `EventType`
|Node, MenuItem, ContextMenu |actionEvents()|Creates an `Observable` that emits an `ActionEvent` every time one occurs
|ObservableList&lt;T>|onChangedObservable()|Returns an `Observable<ObservableList<T>>` that emits the entire `ObservableList<T>` every time it is modified.
|ObservableList&lt;T>|additions()|Creates an `Observable<T>` emitting `T` items that were added to the `ObservableList<T>`
|ObservableList&lt;T>|removals()|Creates an `Observable<T>` emitting `T` items that were removed from the `ObservableList<T>`
|ObservableList&lt;T>|updates()|Creates an `Observable<T>` emitting `T` items whose specified properties were updated in the `ObservableList<T>`
|ObservableList&lt;T>|changes()|Creates an `Observable<ListChange<T>>` emitting `ListChange<T>` items, which pairs each item with an `ADDED`, `REMOVED`, or `UPDATED` flag
|ObservableList&lt;T>|distinctChanges()|Creates an `Observable<ListChange<T>>` emitting *distinct* `ListChange<T>` items. It  will only emit the first `ADDED` item `T` and not emit dupes, and will only emit the `REMOVED` item `T` when no more dupes exist
|ObservableList&lt;T>|distinctChanges(mapper: (T) -> R)|Creates an `Observable<ListChange<T>>` emitting *distinct* `ListChange<T>` items based off the `mapper`'s definition of a distinct value `R`. It  will only emit the first `ADDED` item `T` and not emit dupes, and will only emit the `REMOVED` item `T` when no more dupes exist
|ObservableList&lt;T>|distinctMappingChanges(mapper: (T) -> R)|Creates an `Observable<ListChange<R>>` emitting *distinct* `ListChange<R>` mappings based off the `mapper`'s definition of a distinct value `R`. It  will only emit the first `ADDED` item `R` and not emit dupes, and will only emit the `REMOVED` item `R` when no more dupes exist


##### Observable of Button ActionEvents
```kotlin
val myButton = Button("Press Me")
val subscription = myButton.actionEvents().subscribe { println("Pressed!") } 
```
##### Creating a Reactive Binding
```kotlin
val myButton = Button("Press Me")

val countBinding = myButton.actionEvents().map { 1 }
    .scan(0, { x,y -> x + y })
    .map { it.toString() }
    .toBinding()
    
val myLabel = Label()
myLabel.textProperty().bind(countBinding)
```

##### Observable of ObservableList Events
```kotlin
val items = FXCollections.observableArrayList("Alpha", "Beta", "Gamma")

val changes = items.changes()

changes.filter { it.flag == Flag.ADDED }
        .map { it.value }
        .subscribe { println("ADDED $it") }

items.add("Delta")
items.add("Epsilon")
```
###### OUTPUT
```
ADDED Delta
ADDED Epsilon
```

##### Turning an ObservableList into a Hot Concatenation

```kotlin
val observableList = FXCollections.observableArrayList<String>()

observableList.onChangedObservable()
        .flatMap {
            it.toObservable().map { it.length }
                    .map { it.toString() }
                    .reduce { s1,s2 -> s1 + "|"  + s2  }
        }
        .subscribe { println(it) }

observableList.setAll("Alpha", "Beta", "Gamma")
observableList.add("Delta")
observableList.add("Epsilon")
observableList.remove("Alpha")

```
###### OUTPUT
```
5|4|5
5|4|5|5
5|4|5|5|7
4|5|5|7
```

##### Using a Dialog or Alert

```kotlin
val dialog = Alert(AlertType.CONFIRMATION, "Are you sure you want to continue?")

dialog.toObservable().filter { it == ButtonType.YES }
	.subscribe { println("You pressed YES") } 
```

##### Using and Disposing CompositeBinding
```kotlin
val binding1: Binding = ...
val binding2: Binding = ... 

//adding one at a time
val bindings = CompositeBinding()
val bindings += binding1
val bindings += binding2

//or all at once
val bindings = CompositeBinding(binding1,binding2)

//do stuff, then dispose Bindings
bindings.dispose()
```


### Operators
RxKotlinFX has a growing list of operators placed as extension functions onto `Observable` that aid interoperability with JavaFX.

|Operator|Description|
|----|-----|
|observeOnFx()|Schedules the emissions to be observed on the JavaFX thread
|subscribeOnFx()|Schedules the source `Observable` to emit items on the JavaFX thread
|doOnNextFx()|Executes the specified action on the FX thread for each emission
|doOnErrorFx()|Executes the specified action on the FX thread when an error is emitted
|doOnCompleteFx()|Executes the specified action on the FX thread when the `Observable` calls `onComplete()`
|doOnSubscribeFx()|Executes the specified action on the FX thread when the `Observable` is first subscribed
|doOnTerminateFx()|Executes the specified action on the FX thread when the `Observable` calls `onComplete()` or `onError()`
|doOnDisposeFx()|Executes the specified action on the FX thread when the `Observable` is unsubscribed
|doOnNextCount()|Executes the specified action with the cumulative count of emissions for that emission
|doOnErrorCount()|Executes the specified action with the cumulative count of emissions when an error is emitted
|doOnCompleteCount()|Executes the specified action with the total emission count when `onComplete()` is called
|doOnNextCountFx()|Same as `doOnNextCount()` except action is executed on FX thread
|doOnErrorCountFx()|Same as `doOnErrorCount()` except action is executed on FX thread
|doOnCompleteCountFx()|Same as `doOnCompleteCount()` except action is executed on FX thread

The `doOnXXXCount()` operators are especially helpful for providing a status update of how many items have been "processed" by an `Observable`. 

```kotlin
val source = Observable.range(1,1000)
val processedCountLabel = Label()

source.map { it * 10 }
     .doOnNextFx { processedCountLabel.text = "Processed $it items" }
     .subsribe { doSomethingWith(it) }
```

### Control Extensions
The rest of the project will likely add convenient extension functions to emit events as `Observable` values, [much like the TornadoFX project has done](https://github.com/edvin/tornadofx/blob/master/src/main/java/tornadofx/Nodes.kt). For example, helpful `Observable` extension functions and properties can be added to `TableView` and `ListView`, such as selection events.

```kotlin
val tableView: TableView<MyItem> = ...
val selections: Observable<MyItem> = tableView.itemSelections
val rowIndexSelections: Observable<Int> = tableView.rowIndexSelections
```

Check releases as well the [Nodes code file](https://github.com/thomasnield/RxKotlinFX/blob/master/src/main/kotlin/rx/javafx/kt/Nodes.kt) to see a list of available extensions. Feel free to contribute if you see any missing.


## Bugs and Feedback

For bugs, questions and discussions please use the [Github Issues](https://github.com/thomasnield/RxKotlinFx/issues).

 
## LICENSE

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

<http://www.apache.org/licenses/LICENSE-2.0>

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.



================================================
FILE: build.gradle
================================================
buildscript {
    ext.kotlin_version = '1.1.60'

    repositories {
    mavenCentral()
  }
  dependencies {
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
  }
}

apply plugin: "kotlin"
apply plugin: 'maven'
apply plugin: 'signing'

sourceCompatibility = JavaVersion.VERSION_1_8
targetCompatibility = JavaVersion.VERSION_1_8

repositories {
  mavenCentral()
}


dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    compile 'io.reactivex.rxjava2:rxjavafx:2.2.2'
    testCompile 'junit:junit:4.12'
}


task javadocJar(type: Jar) {
    classifier = 'javadoc'
    from javadoc
}

task sourcesJar(type: Jar) {
    classifier = 'sources'
    from sourceSets.main.allSource
}

artifacts {
    archives javadocJar, sourcesJar
}

signing {
    sign configurations.archives
}

group = "com.github.thomasnield"
archivesBaseName = "rxkotlinfx"
version = "2.2.2"

uploadArchives {
    repositories {
        mavenDeployer {
            beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }

            repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
                authentication(userName: ossrhUsername, password: ossrhPassword)
            }

            snapshotRepository(url: "https://oss.sonatype.org/content/repositories/snapshots/") {
                authentication(userName: ossrhUsername, password: ossrhPassword)
            }

            pom.project {
                name 'RxKotlinFX'
                packaging 'jar'
                // optionally artifactId can be defined here
                description 'Interoperability library for RxJava, JavaFX, and Kotlin'
                url 'https://github.com/thomasnield/RxKotlinFX'

                scm {
                    connection 'scm:git:git://github.com/thomasnield/RxKotlinFX.git'
                    developerConnection 'scm:git:git@github.com:thomasnield/RxKotlinFX.git'
                    url 'https://github.com/thomasnield/RxKotlinFX.git'
                }

                licenses {
                    license {
                        name 'The Apache License, Version 2.0'
                        url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
                    }
                }
                developers {
                    developer {
                        id 'thomasnield'
                        name 'Thomas Nield'
                        email 'thomasnield@live.com'
                    }
                }
            }
        }
    }
}

================================================
FILE: gradle/wrapper/gradle-wrapper.properties
================================================
#Sat Feb 25 20:14:08 CST 2017
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip


================================================
FILE: gradlew
================================================
#!/usr/bin/env bash

##############################################################################
##
##  Gradle start up script for UN*X
##
##############################################################################

# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS=""

APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`

# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"

warn ( ) {
    echo "$*"
}

die ( ) {
    echo
    echo "$*"
    echo
    exit 1
}

# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
case "`uname`" in
  CYGWIN* )
    cygwin=true
    ;;
  Darwin* )
    darwin=true
    ;;
  MINGW* )
    msys=true
    ;;
esac

# Attempt to set APP_HOME
# Resolve links: $0 may be a link
PRG="$0"
# Need this for relative symlinks.
while [ -h "$PRG" ] ; do
    ls=`ls -ld "$PRG"`
    link=`expr "$ls" : '.*-> \(.*\)$'`
    if expr "$link" : '/.*' > /dev/null; then
        PRG="$link"
    else
        PRG=`dirname "$PRG"`"/$link"
    fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >/dev/null
APP_HOME="`pwd -P`"
cd "$SAVED" >/dev/null

CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar

# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
        # IBM's JDK on AIX uses strange locations for the executables
        JAVACMD="$JAVA_HOME/jre/sh/java"
    else
        JAVACMD="$JAVA_HOME/bin/java"
    fi
    if [ ! -x "$JAVACMD" ] ; then
        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME

Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
    fi
else
    JAVACMD="java"
    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.

Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi

# Increase the maximum file descriptors if we can.
if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
    MAX_FD_LIMIT=`ulimit -H -n`
    if [ $? -eq 0 ] ; then
        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
            MAX_FD="$MAX_FD_LIMIT"
        fi
        ulimit -n $MAX_FD
        if [ $? -ne 0 ] ; then
            warn "Could not set maximum file descriptor limit: $MAX_FD"
        fi
    else
        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
    fi
fi

# For Darwin, add options to specify how the application appears in the dock
if $darwin; then
    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi

# For Cygwin, switch paths to Windows format before running java
if $cygwin ; then
    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
    JAVACMD=`cygpath --unix "$JAVACMD"`

    # We build the pattern for arguments to be converted via cygpath
    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
    SEP=""
    for dir in $ROOTDIRSRAW ; do
        ROOTDIRS="$ROOTDIRS$SEP$dir"
        SEP="|"
    done
    OURCYGPATTERN="(^($ROOTDIRS))"
    # Add a user-defined pattern to the cygpath arguments
    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
    fi
    # Now convert the arguments - kludge to limit ourselves to /bin/sh
    i=0
    for arg in "$@" ; do
        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option

        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
        else
            eval `echo args$i`="\"$arg\""
        fi
        i=$((i+1))
    done
    case $i in
        (0) set -- ;;
        (1) set -- "$args0" ;;
        (2) set -- "$args0" "$args1" ;;
        (3) set -- "$args0" "$args1" "$args2" ;;
        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
    esac
fi

# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
function splitJvmOpts() {
    JVM_OPTS=("$@")
}
eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"

exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"


================================================
FILE: gradlew.bat
================================================
@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem  Gradle startup script for Windows
@rem
@rem ##########################################################################

@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal

@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS=

set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%

@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome

set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto init

echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.

goto fail

:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe

if exist "%JAVA_EXE%" goto init

echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.

goto fail

:init
@rem Get command-line arguments, handling Windowz variants

if not "%OS%" == "Windows_NT" goto win9xME_args
if "%@eval[2+2]" == "4" goto 4NT_args

:win9xME_args
@rem Slurp the command line arguments.
set CMD_LINE_ARGS=
set _SKIP=2

:win9xME_args_slurp
if "x%~1" == "x" goto execute

set CMD_LINE_ARGS=%*
goto execute

:4NT_args
@rem Get arguments from the 4NT Shell from JP Software
set CMD_LINE_ARGS=%$

:execute
@rem Setup the command line

set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar

@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%

:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd

:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1

:mainEnd
if "%OS%"=="Windows_NT" endlocal

:omega


================================================
FILE: src/main/kotlin/com/github/thomasnield/rxkotlinfx/Nodes.kt
================================================
package com.github.thomasnield.rxkotlinfx

import io.reactivex.Observable
import javafx.scene.control.*

/**
 * Returns an [Observable] emitting integer values for selected row indexes.
 */
val <T> TableView<T>.rowIndexSelections: Observable<Int>
    get() = itemSelections.map { selectionModel.selectedIndex }

/**
 * Returns an [Observable] emitting integer values for selected column indexes.
 */
val <T> TableView<T>.columnIndexSelections: Observable<Int>
    get() = selectionModel.selectedCells
            .additions().map { it.column }

/**
 * Returns an [Observable] emitting selected items for the given TableView
 */
val <T> TableView<T>.itemSelections: Observable<T>
    get() = selectionModel.selectedItemProperty().toObservable()

/**
 * Returns an [Observable] emitting single selected items for the given [ListView]
 */
val <T> ListView<T>.itemSelections: Observable<T>
    get() = selectionModel.selectedItems.additions()

/**
 * Returns an [Observable] emitting single selected items for the given [ComboBox]
 */
val <T> ComboBox<T>.valueSelections: Observable<T>
    get() = valueProperty().toObservable()

/**
 * Returns an [Observable] emitting text value inputs for the given [TextField]
 */
val TextField.textValues: Observable<String>
        get() = textProperty().toObservable()

/**
 * Returns an [Observable] emitting [Tab] selections for the given [TabPane]
 */
val TabPane.tabSelections: Observable<Tab>
        get() = selectionModel.selectedItemProperty().toObservable()


================================================
FILE: src/main/kotlin/com/github/thomasnield/rxkotlinfx/Observables.kt
================================================
package com.github.thomasnield.rxkotlinfx

import io.reactivex.Flowable
import io.reactivex.Maybe
import io.reactivex.Observable
import io.reactivex.Single
import io.reactivex.rxjavafx.observables.JavaFxObservable
import io.reactivex.rxjavafx.observers.JavaFxObserver
import io.reactivex.rxjavafx.observers.JavaFxSubscriber
import io.reactivex.rxjavafx.sources.SetChange
import javafx.beans.binding.Binding
import javafx.beans.value.ObservableValue
import javafx.collections.ObservableList
import javafx.collections.ObservableMap
import javafx.collections.ObservableSet
import javafx.event.Event
import javafx.event.EventType
import javafx.scene.Node
import javafx.scene.Scene
import javafx.scene.control.ContextMenu
import javafx.scene.control.Dialog
import javafx.scene.control.MenuItem
import javafx.stage.Window
import javafx.stage.WindowEvent
import java.util.*

/**
 * Turns an Observable into a JavaFX Binding. Calling the Binding's dispose() method will handle the disposal.
 */
fun <T> Observable<T>.toBinding(actionOp: (ObservableBindingSideEffects<T>.() -> Unit)? = null): Binding<T> {
    val transformer = actionOp?.let {
        val sideEffects = ObservableBindingSideEffects<T>()
        it.invoke(sideEffects)
        sideEffects.transformer
    }
    return JavaFxObserver.toBinding((transformer?.let { this.compose(it) }?:this))
}


/**
 * Turns an Flowable into a JavaFX Binding. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Flowable<T>.toBinding(actionOp: (FlowableBindingSideEffects<T>.() -> Unit)? = null): Binding<T> {
    val transformer = actionOp?.let {
        val sideEffects = FlowableBindingSideEffects<T>()
        it.invoke(sideEffects)
        sideEffects.transformer
    }
    return JavaFxSubscriber.toBinding((transformer?.let { this.compose(it) }?:this))
}

/**
 * Turns an Observable into a JavaFX Binding with a nullSentinel `T` acting as a placeholder for null values. Calling the Binding's dispose() method will handle the disposal.
 */
fun <T> Observable<T>.toNullBinding(nullSentinel: T, actionOp: (ObservableBindingSideEffects<T>.() -> Unit)? = null): Binding<T> {
    val transformer = actionOp?.let {
        val sideEffects = ObservableBindingSideEffects<T>()
        it.invoke(sideEffects)
        sideEffects.transformer
    }
    return JavaFxObserver.toNullBinding((transformer?.let { this.compose(it) }?:this), nullSentinel)
}


/**
 * Turns an Flowable into a JavaFX Binding with a nullSentinel `T` acting as a placeholder for null values. Calling the Binding's dispose() method will handle the disposal.
 */
fun <T> Flowable<T>.toNullBinding(nullSentinel: T, actionOp: (FlowableBindingSideEffects<T>.() -> Unit)? = null): Binding<T> {
    val transformer = actionOp?.let {
        val sideEffects = FlowableBindingSideEffects<T>()
        it.invoke(sideEffects)
        sideEffects.transformer
    }
    return JavaFxSubscriber.toNullBinding((transformer?.let { this.compose(it) }?:this), nullSentinel)
}


/**
 * Turns an Observable into a JavaFX Binding that automatically unwraps the Optional to a nullable value. Calling the Binding's dispose() method will handle the disposal.
 */
fun <T> Observable<Optional<T>>.toNullableBinding(actionOp: (ObservableBindingSideEffects<Optional<T>>.() -> Unit)? = null): Binding<T> {
    val transformer = actionOp?.let {
        val sideEffects = ObservableBindingSideEffects<Optional<T>>()
        it.invoke(sideEffects)
        sideEffects.transformer
    }
    return JavaFxObserver.toNullableBinding((transformer?.let { this.compose(it) }?:this))
}


/**
 * Turns an `Flowable<Optional<T>>` into a JavaFX Binding that automatically unwraps the Optional to a nullable value. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Flowable<Optional<T>>.toNullableBinding(actionOp: (FlowableBindingSideEffects<Optional<T>>.() -> Unit)? = null): Binding<T> {
    val transformer = actionOp?.let {
        val sideEffects = FlowableBindingSideEffects<Optional<T>>()
        it.invoke(sideEffects)
        sideEffects.transformer
    }
    return JavaFxSubscriber.toNullableBinding((transformer?.let { this.compose(it) }?:this))
}


/**
 * Turns an Observable into a lazy JavaFX Binding, by lazy meaning it will delay subscription until `getValue()` is requested. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Observable<T>.toLazyBinding() = JavaFxObserver.toLazyBinding(this)


/**
 * Turns a Flowable into a lazy JavaFX Binding, by lazy meaning it will delay subscription until `getValue()` is requested. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Flowable<T>.toLazyBinding() = JavaFxSubscriber.toLazyBinding(this)



/**
 * Turns an `Observable<Optional<T>>` into a lazy JavaFX Binding that automatically unwraps the Optional to a nullable value, by lazy meaning it will delay subscription until `getValue()` is requested. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Observable<Optional<T>>.toLazyNullableBinding() = JavaFxObserver.toLazyNullableBinding(this)


/**
 * Turns a `Flowable<Optional<T>>` into a lazy JavaFX Binding, by lazy meaning it will delay subscription until `getValue()` is requested. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Flowable<Optional<T>>.toLazyNullableBinding() = JavaFxSubscriber.toLazyNullableBinding(this)

/**
 * Turns a Single into a JavaFX Binding. Calling the Binding's dispose() method will handle the disposal.
 */
fun <T> Single<T>.toBinding(actionOp: (ObservableBindingSideEffects<T>.() -> Unit)? = null): Binding<T> {
    val transformer = actionOp?.let {
        val sideEffects = ObservableBindingSideEffects<T>()
        it.invoke(sideEffects)
        sideEffects.transformer
    }
    return JavaFxObserver.toBinding((transformer?.let { this.toObservable().compose(it) }?:this.toObservable()))
}

/**
 * Turns a Single into a lazy JavaFX Binding, by lazy meaning it will delay subscription until `getValue()` is requested. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Single<T>.toLazyBinding() = JavaFxObserver.toLazyBinding(this.toObservable())


/**
 * Turns a `Single<Optional<T>>` into a lazy JavaFX Binding that automatically unwraps the Optional to a nullable value, by lazy meaning it will delay subscription until `getValue()` is requested. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Single<Optional<T>>.toLazyNullableBinding() = JavaFxObserver.toLazyNullableBinding(this.toObservable())


/**
 * Turns a Maybe into a JavaFX Binding. Calling the Binding's dispose() method will handle the disposal.
 */
fun <T> Maybe<T>.toBinding(actionOp: (ObservableBindingSideEffects<T>.() -> Unit)? = null): Binding<T> {
    val transformer = actionOp?.let {
        val sideEffects = ObservableBindingSideEffects<T>()
        it.invoke(sideEffects)
        sideEffects.transformer
    }
    return JavaFxObserver.toBinding((transformer?.let { this.toObservable().compose(it) }?:this.toObservable()))
}

/**
 * Turns a Maybe into a lazy JavaFX Binding, by lazy meaning it will delay subscription until `getValue()` is requested. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Maybe<T>.toLazyBinding() = JavaFxObserver.toLazyBinding(this.toObservable())

/**
 * Turns a `Maybe<Optional<T>>` into a lazy JavaFX Binding that automatically unwraps the Optional to a nullable value, by lazy meaning it will delay subscription until `getValue()` is requested. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Maybe<Optional<T>>.toLazyNullableBinding() = JavaFxObserver.toLazyNullableBinding(this.toObservable())



/**
 * Turns an Observable into a lazy JavaFX Binding, by lazy meaning it will delay subscription until `getValue()` is requested. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Observable<T>.toLazyBinding(errorHandler: (Throwable) -> Unit) = JavaFxObserver.toLazyBinding(this,errorHandler)

/**
 * Turns a Flowable into a lazy JavaFX Binding, by lazy meaning it will delay subscription until `getValue()` is requested. Calling the Binding's dispose() method will handle the unsubscription.
 */
fun <T> Flowable<T>.toLazyBinding(errorHandler: (Throwable) -> Unit) = JavaFxSubscriber.toLazyBinding(this,errorHandler)


/**
 * Create an rx Observable from a javafx ObservableValue
 * @param <T>          the type of the observed value
 * @return an Observable emitting values as the wrapped ObservableValue changes
 */
fun <T> ObservableValue<T>.toObservable() = JavaFxObservable.valuesOf(this)

/**
 * Create an rx Observable from a javafx ObservableValue
 * @param <T>          the type of the observed value
 * @param nullSentinel the default sentinel value emitted when the observable is null
 * @return an Observable emitting values as the wrapped ObservableValue changes
 */
fun <T> ObservableValue<T>.toObservable(nullSentinel: T) = JavaFxObservable.valuesOf(this, nullSentinel)


/**
 * Create an rx Observable from a javafx ObservableValue, emitting nullable values as Java 8 `Optional` types
 * @param <T>          the type of the observed value
 * @return an Observable emitting `Optional<T>` values as the wrapped ObservableValue changes
 */
fun <T> ObservableValue<T>.toNullableObservable() = JavaFxObservable.nullableValuesOf(this)

/**
 * Create an rx Observable from a javafx Observable, emitting it when an invalidation occursk
 * @return an rx Observable emitting the JavaFX Observable every time it is invalidated
 */
fun javafx.beans.Observable.invalidations() = JavaFxObservable.invalidationsOf(this)

/**
 * Create an rx Observable from a javafx ObservableValue, and emits changes with old and new value pairs
 * @param <T>          the type of the observed value
 * @return an Observable emitting values as the wrapped ObservableValue changes
 */
fun <T> ObservableValue<T>.toObservableChanges() = JavaFxObservable.changesOf(this)

/**
 * Create an rx Observable from a javafx ObservableValue, and emits changes with old and new non-null value pairs
 * @param <T>          the type of the observed value
 * @return an Observable emitting non-null values as the wrapped ObservableValue changes
 */
fun <T> ObservableValue<T>.toObservableChangesNonNull() = JavaFxObservable.nonNullChangesOf(this)


/**
 * Creates an observable corresponding to javafx ContextMenu action events.
 * @return An Observable of UI ActionEvents
 */
fun ContextMenu.actionEvents() = JavaFxObservable.actionEventsOf(this)

/**
 * Creates an observable corresponding to javafx MenuItem action events.
 *
 * @param menuItem      The target of the ActionEvents
 * @return An Observable of UI ActionEvents
 */
fun MenuItem.actionEvents() = JavaFxObservable.actionEventsOf(this)

/**
 * Creates an observable corresponding to javafx Node action events.
 * @return An Observable of UI ActionEvents
 */
fun Node.actionEvents() = JavaFxObservable.actionEventsOf(this)

/**
 * Creates an observable corresponding to javafx Node events.
 * @param eventType The type of the observed UI events
 * @return An Observable of UI events, appropriately typed
 */
fun <T : Event> Node.events(eventType: EventType<T>) = JavaFxObservable.eventsOf(this, eventType)
/**
 * Create an rx Observable from a javafx ObservableValue
 * @param <T>          the type of the observed value
 * @return an Observable emitting values as the wrapped ObservableValue changes
 */
fun <T: Event> Scene.events(eventType: EventType<T>) = JavaFxObservable.eventsOf(this,eventType)
/**
 * Create an rx Observable from a javafx ObservableValue, and emits changes with old and new value pairs
 * @param <T>          the type of the observed value
 * @return an Observable emitting values as the wrapped ObservableValue changes
 */
fun <T: WindowEvent> Window.events(eventType: EventType<T>) = JavaFxObservable.eventsOf(this,eventType)

/**
 * Creates an observable that emits an ObservableList every time it is modified
 * @return An Observable emitting the ObservableList each time it changes
 */
fun <T> ObservableList<T>.onChangedObservable() = JavaFxObservable.emitOnChanged(this)

/**
 * Creates an observable that emits all removal items from an ObservableList
 * @return An Observable emitting items removed from the ObservableList
 */
fun <T> ObservableList<T>.removals() = JavaFxObservable.removalsOf(this)
/**
 * Creates an observable that emits all additions to an ObservableList
 * @return An Observable emitting items added to the ObservableList
 */
fun <T> ObservableList<T>.additions() = JavaFxObservable.additionsOf(this)
/**
 * Creates an observable that emits all updated items from an ObservableList.
 * If you declare an ObservableList that listens to one or more properties of each element,
 * you can emit the changed items every time these properties are modified
 * <pre>ObservableList<Person> sourceList = FXCollections.observableArrayList(user -> new javafx.beans.Observable[]{user.age} );</pre>
 * @return An Observable emitting items updated in the ObservableList
 */
fun <T> ObservableList<T>.updates() = JavaFxObservable.updatesOf(this)
/**
 * Emits all added, removed, and updated items from an ObservableList
 * @return An Observable emitting changed items with an ADDED, REMOVED, or UPDATED flags
 */
fun <T> ObservableList<T>.changes() = JavaFxObservable.changesOf(this)

/**
 * Emits distinctly  added and removed items from an ObservableList.
 * If dupe items with identical hashcode/equals evaluations are added to an ObservableList, only the first one will fire an ADDED item.
 * When the last dupe is removed, only then will it fire a REMOVED item.
 * @return An Observable emitting changed items with an ADDED, REMOVED, or UPDATED flags
 */
fun <T> ObservableList<T>.distinctChanges() = JavaFxObservable.distinctChangesOf(this)
/**
 * Emits distinctly added and removed items item from an ObservableList.
 * If dupe mapped R items with identical hashcode/equals evaluations are added to an ObservableList, only the first one will fire an ADDED T item.
 * When the last dupe is removed, only then will it fire a REMOVED T item.
 * @return An Observable emitting changed mapped items with an ADDED, REMOVED, or UPDATED flags
 */
fun <T,R> ObservableList<T>.distinctChanges(mapper: ((T) -> R)) = JavaFxObservable.distinctChangesOf(this,mapper)

/**
 * Emits distinctly added and removed mappings to each R item from an ObservableList.
 * If dupe mapped R items with identical hashcode/equals evaluations are added to an ObservableList, only the first one will fire an ADDED R item.
 * When the last dupe is removed, only then will it fire a REMOVED R item.
 * @return An Observable emitting changed mapped items with an ADDED, REMOVED, or UPDATED flags
 */
fun <T,R> ObservableList<T>.distinctMappingChanges(mapper: ((T) -> R)) = JavaFxObservable.distinctMappingsOf(this,mapper)

/**
 * Creates an observable that emits an ObservableMap every time it is modified
 * @return An Observable emitting the ObservableMap each time it changes
 */
fun <K,T> ObservableMap<K, T>.onChangedObservable() = JavaFxObservable.emitOnChanged(this)
/**
 * Creates an observable that emits all removal items from an ObservableMap
 * @return An Observable emitting items removed from the ObservableMap
 */
fun <K,T> ObservableMap<K, T>.removals() = JavaFxObservable.removalsOf(this)
/**
 * Creates an observable that emits all additions to an ObservableMap
 * @return An Observable emitting items added to the ObservableMap
 */
fun <K,T> ObservableMap<K, T>.additions() = JavaFxObservable.additionsOf(this)
/**
 * Emits all added, removed, and updated items from an ObservableMap
 * @return An Observable emitting changed items with an ADDED, REMOVED, or UPDATED flags
 */
fun <K,T> ObservableMap<K, T>.changes() = JavaFxObservable.changesOf(this)

/**
 * Creates an observable that emits an ObservableSet every time it is modified
 * @return An Observable emitting the ObservableSet each time it changes
 */
fun <T> ObservableSet<T>.onChangedObservable() = JavaFxObservable.emitOnChanged(this)

/**
 * Creates an observable that emits all removal items from an ObservableSet
 * @return An Observable emitting items removed from the ObservableSet
 */
fun <T> ObservableSet<T>.removals() = JavaFxObservable.removalsOf(this)
/**
 * Creates an observable that emits all additions to an ObservableSet
 * @return An Observable emitting items added to the ObservableSet
 */
fun <T> ObservableSet<T>.additions() = JavaFxObservable.additionsOf(this)
/**
 * Emits all added, removed, and updated items from an ObservableSet
 * @return An Observable emitting changed items with an ADDED, REMOVED, or UPDATED flags
 */
fun <T> ObservableSet<SetChange<T>>.changes() = JavaFxObservable.changesOf(this)


/**
 * Emits the response `T` for a given `Dialog<T>`. If no response is provided the Maybe  will be empty.
 */
fun <T> Dialog<T>.toMaybe() = JavaFxObservable.fromDialog(this)!!

================================================
FILE: src/main/kotlin/com/github/thomasnield/rxkotlinfx/Operators.kt
================================================
package com.github.thomasnield.rxkotlinfx

import io.reactivex.*
import io.reactivex.rxjavafx.schedulers.JavaFxScheduler
import io.reactivex.rxjavafx.transformers.FxFlowableTransformers
import io.reactivex.rxjavafx.transformers.FxObservableTransformers
import javafx.application.Platform

/**
 * Observes the emissions on the JavaFX Thread.
 * This is the same as calling Observable#observeOn(JavaFxScheduler.platform())
 */
fun <T> Observable<T>.observeOnFx() = observeOn(JavaFxScheduler.platform())

/**
 * Observes the emissions on the JavaFX Thread.
 * This is the same as calling Flowable#observeOn(JavaFxScheduler.platform())
 */
fun <T> Flowable<T>.observeOnFx() = observeOn(JavaFxScheduler.platform())


/**
 * Observes the emissions on the JavaFX Thread.
 * This is the same as calling Single#observeOn(JavaFxScheduler.platform())
 */
fun <T> Single<T>.observeOnFx() = observeOn(JavaFxScheduler.platform())

/**
 * Observes the emissions on the JavaFX Thread.
 * This is the same as calling Maybe#observeOn(JavaFxScheduler.platform())
 */
fun <T> Maybe<T>.observeOnFx() = observeOn(JavaFxScheduler.platform())

/**
 * Observes the emissions on the JavaFX Thread.
 * This is the same as calling Completable#observeOn(JavaFxScheduler.platform())
 */
fun Completable.observeOnFx() = observeOn(JavaFxScheduler.platform())


/**
 * Instructs the source Observable to emit items on the JavaFX Thread.
 * This is the same as calling Observable#subscribeOn(JavaFxScheduler.platform())
 */
fun <T> Observable<T>.subscribeOnFx() = subscribeOn(JavaFxScheduler.platform())

/**
 * Instructs the source Flowable to emit items on the JavaFX Thread.
 * This is the same as calling Flowable#subscribeOn(JavaFxScheduler.platform())
 */
fun <T> Flowable<T>.subscribeOnFx() = subscribeOn(JavaFxScheduler.platform())

/**
 * Observes the emissions on the JavaFX Thread.
 * This is the same as calling Single#subscribeOnFx(JavaFxScheduler.platform())
 */
fun <T> Single<T>.subscribeOnFx() = subscribeOn(JavaFxScheduler.platform())

/**
 * Observes the emissions on the JavaFX Thread.
 * This is the same as calling Maybe#subscribeOnFx(JavaFxScheduler.platform())
 */
fun <T> Maybe<T>.subscribeOnFx() = subscribeOn(JavaFxScheduler.platform())

/**
 * Observes the emissions on the JavaFX Thread.
 * This is the same as calling Completable#subscribeOnFx(JavaFxScheduler.platform())
 */
fun Completable.subscribeOnFx() = subscribeOn(JavaFxScheduler.platform())

/**
 * Performs the provided onNext action on the FX thread
 */
inline fun <T> Observable<T>.doOnNextFx(crossinline onNext: (T) -> Unit): Observable<T> = doOnNext {
    Platform.runLater { onNext.invoke(it) }
}

/**
 * Performs the provided onNext action on the FX thread
 */
inline fun <T> Flowable<T>.doOnNextFx(crossinline onNext: (T) -> Unit): Flowable<T> = doOnNext {
    Platform.runLater { onNext.invoke(it) }
}

/**
 * Performs the provided onError action on the FX thread
 */
inline fun <T> Observable<T>.doOnErrorFx(crossinline onError: (Throwable) -> Unit): Observable<T> = doOnError {
    Platform.runLater { onError.invoke(it) }
}

/**
 * Performs the provided onError action on the FX thread
 */
inline fun <T> Flowable<T>.doOnErrorFx(crossinline onError: (Throwable) -> Unit): Flowable<T> = doOnError {
    Platform.runLater { onError.invoke(it) }
}

/**
 * Performs the provided onComplete action on the FX thread
 */
inline fun <T> Observable<T>.doOnCompleteFx(crossinline onComplete: () -> Unit): Observable<T> = doOnComplete {
    Platform.runLater { onComplete.invoke() }
}

/**
 * Performs the provided onComplete action on the FX thread
 */
inline fun <T> Flowable<T>.doOnCompleteFx(crossinline onComplete: () -> Unit): Flowable<T> = doOnComplete {
    Platform.runLater { onComplete.invoke() }
}

/**
 * Performs the provided onSubscribe action on the FX thread
 */
inline fun <T> Observable<T>.doOnSubscribeFx(crossinline onSubscribe: () -> Unit): Observable<T> = doOnSubscribe {
    Platform.runLater { onSubscribe.invoke() }
}


/**
 * Performs the provided onSubscribe action on the FX thread
 */
inline fun <T> Flowable<T>.doOnSubscribeFx(crossinline onSubscribe: () -> Unit): Flowable<T> = doOnSubscribe {
    Platform.runLater { onSubscribe.invoke() }
}

/**
 * Performs the provided onTerminate action on the FX thread
 */
inline fun <T> Observable<T>.doOnTerminateFx(crossinline onTerminate: () -> Unit): Observable<T> = doOnTerminate {
    Platform.runLater { onTerminate.invoke() }
}

/**
 * Performs the provided onTerminate action on the FX thread
 */
inline fun <T> Flowable<T>.doOnTerminateFx(crossinline onTerminate: () -> Unit): Flowable<T> = doOnTerminate {
    Platform.runLater { onTerminate.invoke() }
}

/**
 * Performs the provided onDispose action on the FX thread
 */
inline fun <T> Observable<T>.doOnDisposeFx(crossinline onDispose: () -> Unit): Observable<T> = this.doOnDispose {
    Platform.runLater { onDispose.invoke() }
}

/**
 * Performs the provided onDispose action on the FX thread
 */
inline fun <T> Flowable<T>.doOnCancelFx(crossinline onDispose: () -> Unit): Flowable<T> = this.doOnCancel {
    Platform.runLater { onDispose.invoke() }
}

/**
 * Executes side effect with the accumulating count of emissions for each onNext() call
 */
fun <T> Observable<T>.doOnNextCount(onNext: (Int) -> Unit): Observable<in T> =
        compose(FxObservableTransformers.doOnNextCount(onNext))


/**
 * Executes side effect with the accumulating count of emissions for each onNext() call
 */
fun <T> Flowable<T>.doOnNextCount(onNext: (Int) -> Unit): Flowable<in T> =
        compose(FxFlowableTransformers.doOnNextCount(onNext))

/**
 * Executes side effect with the total count of emissions for the onComplete() call
 */
fun <T> Observable<T>.doOnCompleteCount(onComplete: (Int) -> Unit): Observable<in T> =
        compose(FxObservableTransformers.doOnCompleteCount(onComplete))

/**
 * Executes side effect with the total count of emissions for the onComplete() call
 */
fun <T> Flowable<T>.doOnCompleteCount(onComplete: (Int) -> Unit): Flowable<in T> =
        compose(FxFlowableTransformers.doOnCompleteCount(onComplete))

/**
 * Executes side effect with the total count of emissions for an onError() call
 */
fun <T> Observable<T>.doOnErrorCount(onError: (Int) -> Unit): Observable<in T> =
        compose(FxObservableTransformers.doOnErrorCount(onError))

/**
 * Executes side effect with the total count of emissions for an onError() call
 */
fun <T> Flowable<T>.doOnErrorCount(onError: (Int) -> Unit): Flowable<in T> =
        compose(FxFlowableTransformers.doOnErrorCount(onError))

/**
 * Executes side effect on FX thread with the accumulating count of emissions for each onNext() call
 */
fun <T> Observable<T>.doOnNextCountFx(onNext: (Int) -> Unit) = doOnNextCount { Platform.runLater { onNext.invoke(it) } }

/**
 * Executes side effect on FX thread with the accumulating count of emissions for each onNext() call
 */
fun <T> Flowable<T>.doOnNextCountFx(onNext: (Int) -> Unit) = doOnNextCount { Platform.runLater { onNext.invoke(it) } }

/**
 * Executes side effect on FX thread with the total count of emissions for the onComplete() call
 */
fun <T> Observable<T>.doOnCompleteCountFx(onComplete: (Int) -> Unit) = doOnCompleteCount { Platform.runLater { onComplete.invoke(it) } }

/**
 * Executes side effect on FX thread with the total count of emissions for the onComplete() call
 */
fun <T> Flowable<T>.doOnCompleteCountFx(onComplete: (Int) -> Unit) = doOnCompleteCount { Platform.runLater { onComplete.invoke(it) } }

/**
 * Executes side effect on FX thread with the total count of emissions for the onError() call
 */
fun <T> Observable<T>.doOnErrorCountFx(onError: (Int) -> Unit) = doOnErrorCount { Platform.runLater { onError.invoke(it) } }


/**
 * Executes side effect on FX thread with the total count of emissions for the onError() call
 */
fun <T> Flowable<T>.doOnErrorCountFx(onError: (Int) -> Unit) = doOnErrorCount { Platform.runLater { onError.invoke(it) } }

================================================
FILE: src/main/kotlin/com/github/thomasnield/rxkotlinfx/Subscribers.kt
================================================
package com.github.thomasnield.rxkotlinfx

import io.reactivex.Flowable
import io.reactivex.FlowableTransformer
import io.reactivex.Observable
import io.reactivex.ObservableTransformer
import io.reactivex.rxjavafx.subscriptions.CompositeBinding
import javafx.beans.binding.Binding
import javafx.beans.property.Property


/**
 * Binds the `Property` to an RxJava `Observable`,
 * meaning it will be bounded to show the latest emissions of that `Observable`.
 * The `Binding` is also returned so caller can be dispose it later if needed
 * @return `Binding`
 */
fun <T> Property<T>.bind(observable: Observable<T>, actionOp: (ObservableBindingSideEffects<T>.() -> Unit)? = null): Binding<T> {
    val transformer = actionOp?.let {
        val sideEffects = ObservableBindingSideEffects<T>()
        it.invoke(sideEffects)
        sideEffects.transformer
    }
    val binding = (transformer?.let { observable.compose(it) }?:observable).toBinding()
    bind(binding)
    return binding
}

/**
 * Binds the `Property` to an RxJava `Flowable`,
 * meaning it will be bounded to show the latest emissions of that `Flowable`.
 * The `Binding` is also returned so caller can be dispose it later if needed
 * @return `Binding`
 */
fun <T> Property<T>.bind(flowable: Flowable<T>, actionOp: (FlowableBindingSideEffects<T>.() -> Unit)? = null): Binding<T> {
    val transformer = actionOp?.let {
        val sideEffects = FlowableBindingSideEffects<T>()
        it.invoke(sideEffects)
        sideEffects.transformer
    }
    val binding = (transformer?.let { flowable.compose(it) }?:flowable).toBinding()
    bind(binding)
    return binding
}
fun <T> Binding<T>.addTo(compositeBinding: CompositeBinding): Binding<T> {
    compositeBinding.add(this)
    return this
}

operator fun <T> CompositeBinding.plusAssign(binding: Binding<T>) = add(binding)

operator fun CompositeBinding.plusAssign(compositeBinding: CompositeBinding) = add(compositeBinding)

operator fun <T> CompositeBinding.minusAssign(binding: Binding<T>) = remove(binding)

operator fun CompositeBinding.minusAssign(compositeBinding: CompositeBinding) = remove(compositeBinding)

class ObservableBindingSideEffects<T> {
    private var onNextAction: ((T) -> Unit)? = null
    private var onCompleteAction: (() -> Unit)? = null
    private var onErrorAction: ((ex: Throwable) -> Unit)? = null

    fun onNext(onNext: (T) -> Unit): Unit {
        onNextAction = onNext
    }

    fun onComplete(onComplete: () -> Unit): Unit {
        onCompleteAction = onComplete
    }

    fun onError(onError: (ex: Throwable) -> Unit): Unit {
        onErrorAction = onError
    }

    internal val transformer: ObservableTransformer<T, T> get() = ObservableTransformer<T, T> { obs ->
        var withActions: Observable<T> = obs
        withActions = onNextAction?.let { withActions.doOnNext(onNextAction) } ?: withActions
        withActions = onCompleteAction?.let { withActions.doOnComplete(onCompleteAction) } ?: withActions
        withActions = onErrorAction?.let { withActions.doOnError(onErrorAction) } ?: withActions
        withActions
    }
}


class FlowableBindingSideEffects<T> {
    private var onNextAction: ((T) -> Unit)? = null
    private var onCompleteAction: (() -> Unit)? = null
    private var onErrorAction: ((ex: Throwable) -> Unit)? = null

    fun onNext(onNext: (T) -> Unit): Unit {
        onNextAction = onNext
    }

    fun onComplete(onComplete: () -> Unit): Unit {
        onCompleteAction = onComplete
    }

    fun onError(onError: (ex: Throwable) -> Unit): Unit {
        onErrorAction = onError
    }

    internal val transformer: FlowableTransformer<T, T> get() = FlowableTransformer<T, T> { obs ->
        var withActions: Flowable<T> = obs
        withActions = onNextAction?.let { withActions.doOnNext(onNextAction) } ?: withActions
        withActions = onCompleteAction?.let { withActions.doOnComplete(onCompleteAction) } ?: withActions
        withActions = onErrorAction?.let { withActions.doOnError(onErrorAction) } ?: withActions
        withActions
    }
}

================================================
FILE: src/main/kotlin/com/github/thomasnield/rxkotlinfx/Util.kt
================================================
package com.github.thomasnield.rxkotlinfx

import io.reactivex.Observable
import java.util.*

@Deprecated("Don't use this anymore. Implement yourself.", ReplaceWith("Single.just(this).filter { it.isPresent }.map { it.get() }", "io.reactivex.Observable"))
fun <T> Optional<T>.toObservable() = Observable.just(this)
        .filter { it.isPresent }
        .map { it.get() }

================================================
FILE: src/test/kotlin/com/github/thomasnield/rxkotlinfx/OperatorsTest.kt
================================================
package com.github.thomasnield.rxkotlinfx

import io.reactivex.Observable
import io.reactivex.schedulers.Schedulers
import javafx.application.Platform
import javafx.embed.swing.JFXPanel
import org.junit.Assert.assertTrue
import java.util.*
import java.util.concurrent.CountDownLatch
import java.util.concurrent.TimeUnit
import java.util.concurrent.atomic.AtomicInteger

class OperatorsTest {

    init {
        JFXPanel()
    }
    @org.junit.Test
    fun doOnNextFxTest() {
        val latch = CountDownLatch(1)

        Observable.just("Alpha").observeOn(Schedulers.io()).doOnNextFx {
            assertTrue(Platform.isFxApplicationThread())
            latch.countDown()
        }.subscribe()

        latch.await(10, TimeUnit.SECONDS)
    }
    @org.junit.Test
    fun doOnCompletedFxTest() {
        val latch = CountDownLatch(1)

        Observable.just("Alpha").observeOn(Schedulers.io()).doOnCompleteFx() {
            assertTrue(Platform.isFxApplicationThread())
            latch.countDown()
        }.subscribe()

        latch.await(10, TimeUnit.SECONDS)
    }

    @org.junit.Test
    fun doOnSubscribeFx() {
        val latch = CountDownLatch(1)

        Observable.just("Alpha").observeOn(Schedulers.io()).doOnSubscribeFx {
            assertTrue(Platform.isFxApplicationThread())
            latch.countDown()
        }.subscribe()

        latch.await(10, TimeUnit.SECONDS)
    }

    @org.junit.Test
    fun doOnTerminateFx() {
        val latch = CountDownLatch(1)

        Observable.just("Alpha").observeOn(Schedulers.io()).doOnTerminateFx {
            assertTrue(Platform.isFxApplicationThread())
            latch.countDown()
        }.subscribe()

        latch.await(10, TimeUnit.SECONDS)
    }

    @org.junit.Test
    fun doOnUnsubscribeFxTest() {
        val latch = CountDownLatch(1)

        val subscription = Observable.interval(1, TimeUnit.SECONDS).doOnDisposeFx {
            assertTrue(Platform.isFxApplicationThread())
            latch.countDown()
        }.subscribe()

        Thread.sleep(3000)
        subscription.dispose()

        latch.await(10, TimeUnit.SECONDS)
    }
    @org.junit.Test
    fun doOnErrorFxTest() {
        val latch = CountDownLatch(1)

        Observable.just(5).map { it / 0 }.observeOn(Schedulers.io()).doOnErrorFx {
            assertTrue(Platform.isFxApplicationThread())
            latch.countDown()
        }.onErrorResumeNext(Observable.empty()).subscribe()

        latch.await()
    }
    @org.junit.Test
    fun doOnNextCountTest() {
        val items: MutableList<Int> = ArrayList()

        Observable.just("Alpha","Beta","Gamma")
            .doOnNextCount { items.add(it) }
            .subscribe()

        assertTrue(items.containsAll(listOf(1,2,3)))
    }
    @org.junit.Test
    fun doOnCompletedCountTest() {

        var value: Int? = null
        Observable.just("Alpha","Beta","Gamma")
                .doOnCompleteCount { value = it }
                .subscribe()

        assertTrue(value != null && value == 3)
    }
    @org.junit.Test
    fun doOnErrorCountTest() {

        var value: Int? = null
        Observable.just(1,2,0,3)
                .map { 10 / it }
                .doOnErrorCount { value = it }
                .subscribe()

        assertTrue(value != null && value == 2)
    }
    @org.junit.Test
    fun doOnNextCountFxTest() {
        val latch = CountDownLatch(3)
        var sum: Int = 0
        Observable.just(1,2,3)
            .doOnNextCountFx {
                assertTrue(Platform.isFxApplicationThread())
                sum += it
                latch.countDown()
            }.subscribe()

        latch.await(10, TimeUnit.SECONDS)
        assert(sum == 6)
    }
    @org.junit.Test
    fun doOnCompletedCountFxTest() {
        val latch = CountDownLatch(1)
        var value: Int? = null
        Observable.just("Alpha","Beta","Gamma")
                .doOnCompleteCountFx {
                    assertTrue(Platform.isFxApplicationThread())
                    value = it
                    latch.countDown()
                }.subscribe()

        latch.await(10, TimeUnit.SECONDS)
        assertTrue(value == 3)
    }
    @org.junit.Test
    fun doOnErrorCountFxTest() {
        val latch = CountDownLatch(1)
        var value: Int? = null
        Observable.just(1,3,0,5)
                .map { 10 / it }
                .doOnErrorCountFx {
                    assertTrue(Platform.isFxApplicationThread())
                    value = it
                    latch.countDown()
                }.subscribe()

        latch.await(10, TimeUnit.SECONDS)
        assertTrue(value == 2)
    }

    @org.junit.Test
    fun bindingSideEffectsTest() {
        val counter = AtomicInteger(0)
        Observable.just(1,2,3)
                .toBinding {
                    onNext { counter.incrementAndGet() }
                    onComplete { counter.incrementAndGet() }
                }

        assertTrue(counter.get() == 4)
    }

    @org.junit.Test
    fun bindingSideEffectsErrorTest() {
        val counter = AtomicInteger(0)
        Observable.error<Unit>(Exception("Test"))
                .toBinding {
                    onError { counter.incrementAndGet() }
                }

       assertTrue(counter.get() == 1)
    }
}