/*
 * Copyright 2014-2015 Cel Skeggs
 *
 * This file is part of the CCRE, the Common Chicken Runtime Engine.
 *
 * The CCRE is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any
 * later version.
 *
 * The CCRE is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the CCRE.  If not, see <http://www.gnu.org/licenses/>.
 */
package ccre.frc.components;

import java.awt.Color;
import java.awt.FontMetrics;
import java.awt.Graphics2D;

import ccre.channel.FloatOutput;
import ccre.frc.DeviceComponent;

/**
 * A bar that can be modified to display a floating-point value
 *
 * @author skeggsc
 */
public class FillBarComponent extends DeviceComponent implements FloatOutput {

    private float value = 0.0f;

    @Override
    public int render(Graphics2D g, int width, int height, FontMetrics fontMetrics, int mouseX, int mouseY, int lastShift) {
        int startX = lastShift + 5;
        int startY = 5;
        int endX = width - 5;
        int endY = height - 5;
        int barWidth = endX - startX;
        int barHeight = endY - startY;
        int originX = startX + barWidth / 2;
        g.setColor(Color.WHITE);
        g.drawRect(startX - 1, startY - 1, barWidth + 1, barHeight + 1);
        g.setColor(Color.CYAN);
        int actualLimitX = Math.round((barWidth / 2f) * Math.min(1, Math.max(-1, value)));
        if (actualLimitX < 0) {
            g.fillRect(originX + actualLimitX, startY, -actualLimitX, barHeight);
        } else {
            g.fillRect(originX, startY, actualLimitX, barHeight);
        }
        return width;
    }

    @Override
    public void set(float value) {
        this.value = value;
    }
}