Add option to change the script file (such that orx-olive can be combined with file drag/drop)

orx-olive/src/main/kotlin/Olive.kt

@@ -4,11 +4,12 @@ import org.openrndr.Extension
 import org.openrndr.Program
 import org.openrndr.draw.Session
 import org.openrndr.events.Event
+import org.operndr.extras.filewatcher.stop
 import org.operndr.extras.filewatcher.watchFile
 import java.io.File
 
-
 fun <T> Event<T>.saveListeners(store: MutableMap<Event<*>, List<(Any) -> Unit>>) {
+    @Suppress("UNCHECKED_CAST")
     store[this] = listeners.map { it } as List<(Any) -> Unit>
 }
 
@@ -20,12 +21,24 @@ class Olive<P : Program> : Extension {
     override var enabled: Boolean = true
     var session: Session? = null
 
+
+
+    var running = false
+
+    internal var scriptChange: (String)->Unit = {}
+
     var script = "src/main/kotlin/live.kts"
+        set(value) {
+            scriptChange(value)
+            field = value
+        }
 
     override fun setup(program: Program) {
         System.setProperty("idea.io.use.fallback", "true")
         System.setProperty("org.openrndr.ignoreShadeStyleErrors", "true")
 
+        var watcher: (() -> Unit)? = null
+
         val store = mutableMapOf<Event<*>, List<(Any) -> Unit>>()
 
         val originalExtensions = program.extensions.map { it }
@@ -48,8 +61,9 @@ class Olive<P : Program> : Extension {
 
         trackedListeners.forEach { it.saveListeners(store) }
 
-        val f = File(script)
-
+        fun setupScript(scriptFile:String) {
+            watcher?.stop()
+            val f = File(scriptFile)
             if (!f.exists()) {
                 f.parentFile.mkdirs()
                 var className = program.javaClass.name
@@ -71,25 +85,28 @@ class Olive<P : Program> : Extension {
             """.trimIndent())
             }
 
-        program.watchFile(File(script)) {
+            watcher = program.watchFile(File(script)) {
                 try {
-
                     val script = it.readText()
                     val func = KtsObjectLoader().load<P.() -> Unit>(script)
 
                     program.extensions.clear()
                     program.extensions.addAll(originalExtensions)
 
-                trackedListeners.forEach { it.restoreListeners(store) }
+                    trackedListeners.forEach { l -> l.restoreListeners(store) }
                     session?.end()
 
                     session = Session()
                     session?.start()
 
+                    @Suppress("UNCHECKED_CAST")
                     func(program as P)
                 } catch (e: Throwable) {
                     e.printStackTrace()
                 }
             }
         }
+        setupScript(script)
+        scriptChange = ::setupScript
+    }
 }