Customizing buttons

Navigation customization is possible via the #setNextClickable() and #setPreviousClickable() methods.

Clickable

As with Sendable, Clickable is the abstraction layer for buttons, and its default implementation is ClickableImpl.

Set and add buttons

After setting the clickables, we add them manually by calling #addClickables(). This might look like boilerplate, but it's the only way to ensure we have control over the order of the buttons.

You can also add extra buttons to this row.

public class Example extends Book {
    public Example() {
        super("example");

        // {...}

        // Customize the navigation buttons to our liking
        setNextClickable(clickable -> clickable.setEmoji("➡️"));
        setPreviousClickable(clickable -> clickable.setEmoji("⬅️"));

        // Then add the buttons to the book, alongside any additional buttons you may want to add.
        addClickables(
                // Top to bottom, left to right.
                getPreviousClickable(),
                new ClickableImpl(Clickable.Style.DANGER)
                        .setId("example-danger")
                        .setEmoji("🔥"),
                getNextClickable()
        );
    }
}