For loop in FXML file || How to send data from controller to fxml file?

Question

So I am working on a javaFX application and I want to create multiple <ImageView> using for loop!

Is that possible to make for/foreach loop in a .fxml file ?

If yes , then how ?

Also i have another question! how to send data from the controller to sample.fxml file ? for exemple i want to send a table form controller.java to sample.fxml file and use that table+for loop to make <ImageView> in the fxml file!

Note: I am using the fxml to display the image because I am using those images as buttons.

Here is the code of sample.fxml :

<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.image.Image?>
<GridPane fx:controller="sample.Controller"
          xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">


    <ImageView fitHeight="120" fitWidth="120" fx:id="panda" GridPane.columnIndex="0" GridPane.rowIndex="0" onMousePressed="#mousePressed">
        <image>
            <Image  url="@pics/panda.png">

            </Image>
        </image>
    </ImageView>

</GridPane>

Here is the code of Controller.java :

package sample;

import javafx.scene.input.MouseEvent;
import javafx.scene.media.AudioClip;

public class Controller {

    public void play_audio()
    {
        AudioClip sound = new AudioClip(this.getClass().getResource("voices/panda.mp3").toString());
        sound.play();
    }

    public void mousePressed() {
        play_audio();
    }
}

Code of Main.java :

package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));

        primaryStage.setTitle("Animal Sound");


        Scene scene = new Scene(root, 790, 675);
        scene.getStylesheets().add("sample/styles.css");
        primaryStage.setScene(scene);

        primaryStage.show();
    }


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

Answer 1

I don't think flow control is manageable in an fxml file. Also you don't really pass arguments to an fxml file.

I think you've separated this well, and a little more paring down should get it to work. I would recommend to specify the sounds and the images from the controller. So I would make the controller for each button.

package sample;
import javafx.fxml.FXML;
import javafx.scene.image.ImageView;
import javafx.scene.image.Image;

public class AudioButtonController {
    String sound;
    @FXML
    ImageView image;
    public void setAudioLocation(String resourcePath){
        sound = resourcePath;
    }
    public void setImageLocation(String img){
        image.setImage( new Image( img ) );
    }
    public void mousePressed() {
        System.out.println(sound);
    }
}

Now your fxml for each button can be.

<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.HBox?>
<HBox xmlns:fx="http://javafx.com/fxml" fx:controller="sample.AudioButtonController">
  <ImageView 
      fitHeight="120" fitWidth="120" fx:id="image" onMousePressed="#mousePressed">
  </ImageView>
</HBox>

Here is an example main class that starts up and loads 2 audio buttons, but it could be used to load N buttons.

package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;
public class Main extends Application{

@Override
    public void start(Stage primaryStage) throws Exception{
        FlowPane root = new FlowPane(5, 5);

        primaryStage.setTitle("Animal Sound");

        String[] imgs = { "https://conserveblog.files.wordpress.com/2016/05/flagship-panda-thumbnail.jpeg?w=188", "http://news.bbc.co.uk/media/images/38625000/jpg/_38625095_021223panda150.jpg" };
        for(String img: imgs){
            FXMLLoader loader = new FXMLLoader( getClass().getResource("audio_button.fxml") );
            Parent audioButton = loader.load();
            AudioButtonController abc = loader.getController();
            abc.setAudioLocation("not supported");
            abc.setImageLocation(img);
            root.getChildren().add(audioButton);
        }



        Scene scene = new Scene(root, 790, 675);
        primaryStage.setScene(scene);

        primaryStage.show();
    }

}

This is a bit cumbersome for this example. If your button had more layout controls to it, and your outer layout was more complicated, then this could save some time.