CODEWITHSUNDEEP
javajavafx
leo277
leo277

Reputation: 445

Is it possible to append text in the textfield while typing?

I am trying to build a task manager. I am trying to let the user edit a task, and the program will respond to this command without the user pressing the enter button.

For example, if I have a list of tasks:

  1. go to school
  2. good day

If the user types "edit 2" in the text field, I would like the program to append the content of the 2nd task at the back of the input without having to press the enter button i.e. the text field should change to edit 2 good day. Then the user can modify the content.

Is this possible?

If yes, what are the necessary things I need to learn?

Upvotes: 1

Views: 1509

Answers (1)

ItachiUchiha
ItachiUchiha

Reputation: 36742

You can get this done using the textProperty() of a TextField and playing around with it.

I have created a demo for you :

INPUT

edit 1

OUTPUT

edit 1 go to school

CODE

import java.util.HashMap;
import java.util.Map;

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.Scene;
import javafx.scene.control.TextField;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;

public class TextFieldAutoAppend extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {

        Map<String, String> mapOfTasks = new HashMap<String, String>();
        mapOfTasks.put("1", "go to school");
        mapOfTasks.put("2", "good day");

        Pane pane = new Pane();
        TextField textField = new TextField();
        pane.getChildren().add(textField);

        textField.textProperty().addListener(new ChangeListener<String>() {

            @Override
            public void changed(ObservableValue<? extends String> observable,
                    String oldValue, String newValue) {
                String[] subStrings = newValue.split(" ");
                if(subStrings.length ==2){
                    if(subStrings[0].equalsIgnoreCase("edit") && mapOfTasks.keySet().contains(subStrings[1])){
                        textField.setText(newValue + " " + mapOfTasks.get(subStrings[1]));
                    }
                }
            }
        });

        Scene scene = new Scene(pane, 200, 200);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}

Upvotes: 1

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