package visualiser.model;

import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;

/**
 * The abstract class for the resizable race canvases.
 */
public abstract class ResizableCanvas extends Canvas {
    protected final GraphicsContext gc;

    public ResizableCanvas(){
        this.gc = this.getGraphicsContext2D();
        // Redraw canvas when size changes.
        widthProperty().addListener(evt -> draw());
        heightProperty().addListener(evt -> draw());

    }

    abstract void draw();


    /**
     * Set the Canvas to resizable.
     *
     * @return That the Canvas is resizable.
     */
    @Override
    public boolean isResizable() {
        return true;
    }

    /**
     * Returns the preferred width of the Canvas
     *
     * @param width of canvas
     * @return Returns the width of the Canvas
     */
    @Override
    public double prefWidth(double width) {
        return getWidth();
    }

    /**
     * Returns the preferred height of the Canvas
     *
     * @param height of canvas
     * @return Returns the height of the Canvas
     */
    @Override
    public double prefHeight(double height) {
        return getHeight();
    }

}