/*
 * Copyright (c) 2016 Helmut Neemann
 * Use of this source code is governed by the GPL v3 license
 * that can be found in the LICENSE file.
 */
package de.neemann.digital.draw.shapes;

import de.neemann.digital.core.Observer;
import de.neemann.digital.core.Value;
import de.neemann.digital.core.element.ElementAttributes;
import de.neemann.digital.core.element.Keys;
import de.neemann.digital.core.element.PinDescriptions;
import de.neemann.digital.core.IntFormat;
import de.neemann.digital.draw.elements.IOState;
import de.neemann.digital.draw.elements.Pin;
import de.neemann.digital.draw.elements.Pins;
import de.neemann.digital.draw.graphics.Graphic;
import de.neemann.digital.draw.graphics.Orientation;
import de.neemann.digital.draw.graphics.Style;
import de.neemann.digital.draw.graphics.Vector;

/**
 * The constant shape
 */
public class ConstShape implements Shape {

    private final PinDescriptions outputs;
    private String value;

    /**
     * Creates a new instance
     *
     * @param attr    the attributes
     * @param inputs  the inputs
     * @param outputs the outputs
     */
    public ConstShape(ElementAttributes attr, PinDescriptions inputs, PinDescriptions outputs) {
        this.outputs = outputs;
        int bits = attr.getBits();
        IntFormat format = attr.get(Keys.INT_FORMAT);
        this.value = format.formatToView(new Value(attr.get(Keys.VALUE), bits));
    }

    @Override
    public Pins getPins() {
        return new Pins().add(new Pin(new Vector(0, 0), outputs.get(0)));
    }

    @Override
    public Interactor applyStateMonitor(IOState ioState, Observer guiObserver) {
        return null;
    }

    @Override
    public void drawTo(Graphic graphic, Style heighLight) {
        Vector textPos = new Vector(-3, 0);
        graphic.drawText(textPos, textPos.add(1, 0), value, Orientation.RIGHTCENTER, Style.NORMAL);
    }
}
