CODEWITHSUNDEEP
javajavafxfxml
Quinton
Quinton

Reputation: 19

Passing an Array Parameter In FXML

I'm trying to create a custom control that stores a list of images. Ideally in the FXML file I could instantiate my control by passing an argument that is a list of file paths to said images.

I have gotten the control to load from FXML just fine here is the constructor 

public Gallery(@NamedArg("images") List<String> images) {
    this.imageQueue = new PriorityQueue<>(images);
    this.load("gallery.fxml");
    this.scrollImage();
}

Here is the FXML that loads it

<Gallery fx:id="contentPane" prefHeight="250.0" prefWidth="600.0">
      <images>
          1.png,
          2.png,
          3.png
      </images>
  </Gallery>

Loads without issue, but there are no images and doing some simple prints I see that instead of creating a list with three values of 1.png,2.png,3.png it creates a list with 1 value of "1.png, 2.png, 3.png"

So my question is how do I get this to instantiate as a list with 3 separate values in it?

Upvotes: 0

Views: 172

Answers (1)

fabian
fabian

Reputation: 82461

A similar approach would work with readonly list properties, but there are pieces of information that are not provided with this kind of fxml:

  • Which implementation of List should be used?
  • How many strings are there and where to seperate them; how to tell whether you want a list containing "1.png,\n 2.png,\n 3.png", "1.png,", "\n 2.png,\n 3.png" or something else?

It is possible to do something like this, but you need to modify the structure of your fxml:

<?import java.util.ArrayList?>
<?import java.lang.String?>

...

<Gallery fx:id="contentPane" prefHeight="250.0" prefWidth="600.0">
    <images>
        <ArrayList>
          <String fx:value="1.png" />
          <String fx:value="2.png" />
          <String fx:value="3.png" />
        </ArrayList>
    </images>
</Gallery>

Upvotes: 1

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