JavaFX bindings: added property.fx() extension, deprecated bind(Bidir…

…ectionally)To methods

fx-bindings/src/main/kotlin/net/aquadc/properties/fx/bind.kt

@@ -0,0 +1,64 @@
+package net.aquadc.properties.fx
+
+import javafx.beans.property.SimpleObjectProperty
+import javafx.beans.value.ObservableValue
+import net.aquadc.properties.MutableProperty
+import net.aquadc.properties.Property
+import javafx.beans.property.Property as FxProperty
+
+/**
+ * Binds [this] and [that] property values.
+ * [this] takes [that] value first.
+ */
+@Deprecated("use prop.fx()", replaceWith = ReplaceWith("this.bindBidirectional(that.fx())"))
+fun <T> FxProperty<T>.bindBidirectionally(that: MutableProperty<T>) {
+    this.value = that.value
+    var mutatingThis = false
+    var mutatingThat = false
+
+    this.addListener { _, _, new ->
+        if (!mutatingThis) {
+            mutatingThat = true
+            that.value = new
+            mutatingThat = false
+        }
+    }
+
+    that.addChangeListener { _, new ->
+        if (!mutatingThat) {
+            mutatingThis = true
+            this.value = new
+            mutatingThis = false
+        }
+    }
+}
+
+/**
+ * Binds [this] property value to [that].
+ */
+@Deprecated("use prop.fx()", replaceWith = ReplaceWith("this.bind(that.fx())"))
+fun <T> FxProperty<in T>.bindTo(that: Property<T>) {
+    this.value = that.value
+    that.addChangeListener { _, new ->
+        this.value = new
+    }
+}
+
+/**
+ * Returns [FxProperty] view on this [MutableProperty].
+ */
+fun <T> MutableProperty<T>.fx(): FxProperty<T> {
+    val prop = SimpleObjectProperty<T>()
+    prop.bindBidirectionally(this)
+    return prop
+}
+
+/**
+ * Returns [ObservableValue] view on this [Property].
+ */
+fun <T> Property<T>.fx(): ObservableValue<T> {
+    val prop = SimpleObjectProperty<T>()
+    prop.bindTo(this)
+    return prop
+}
+