当字符串变量更改 TornadoFX 时更改 TextArea 文本

Question

I have a controller with a string variable, and I would like the text value of a TextArea to change when the controller's string variable changes.

class MyView: View() {
...
   button("Run Test").action {
      runAsync {
          for(test in testList){
              controller.updateText = "running" + test.name
              run(test)
          }
      }    
   }
...
   scriptRanArea = textarea {
      text = controller.updateText
   }
...
}

Answer 1

This is the fastest way I know how to accomplish this, but I don't really know which design pattern you want to use:

class MyView: View() {
   val controller: MyController by inject()

   override val root = vbox {
      textarea(controller.myTextProperty)
   }
}

class MyController: Controller() {
   val myTextProperty = SimpleStringProperty()
}

The inject method automatically finds the controller within the TornadoFX Scope, or creates one if not found, when it is first referenced. The TornadoFX text area builder function binds the string property from the controller to the TextArea when it is passed in as a param. Keep in mind though, writing in the text area will now automatically change the value in the controller's property and vice versa. If you don't want that functionality, you will have to update your question to be more specific to your needs.