GradientFillBorder.java

/*******************************************************************************
 * Breakout Cave Survey Visualizer
 *
 * Copyright (C) 2014 James Edwards
 *
 * jedwards8 at fastmail dot fm
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program 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 General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *******************************************************************************/
package org.andork.swing.border;

import java.awt.Color;
import java.awt.Component;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Paint;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.geom.Point2D;

import org.andork.awt.layout.Corner;
import org.andork.awt.layout.Side;

public abstract class GradientFillBorder extends FillBorder {
	public static abstract class From {
		private From() {

		}

		protected abstract Point2D getPoint1(Component c, Graphics g, int x, int y, int width, int height);

		public To to(final Corner corner2) {
			return new To(this) {
				@Override
				protected java.awt.geom.Point2D getPoint2(Component c, Graphics g, int x, int y, int width,
						int height) {
					return Point2D(corner2.location(new Rectangle(x, y, width, height)));
				}
			};
		}

		public To to(final Side side2) {
			return new To(this) {
				@Override
				protected java.awt.geom.Point2D getPoint2(Component c, Graphics g, int x, int y, int width,
						int height) {
					return Point2D(side2.center(new Rectangle(x, y, width, height)));
				}
			};
		}

		public To toAbs(final double x, final double y) {
			return new To(this) {
				@Override
				protected java.awt.geom.Point2D getPoint2(Component c, Graphics g, int x, int y, int width,
						int height) {
					return new Point2D.Double(x, y);
				}
			};
		}

		public To toCenter() {
			return new To(this) {
				@Override
				protected java.awt.geom.Point2D getPoint2(Component c, Graphics g, int x, int y, int width,
						int height) {
					return new Point2D.Double(x + width / 2.0, y + height / 2.0);
				}
			};
		}

		public To toRel(final double xf, final double yf) {
			return new To(this) {
				@Override
				protected java.awt.geom.Point2D getPoint2(Component c, Graphics g, int x, int y, int width,
						int height) {
					return new Point2D.Double(x + width * xf, y + height * yf);
				}
			};
		}
	}

	public static abstract class To {
		From from;

		private To(From from) {
			this.from = from;
		}

		public GradientFillBorder colors(final Color color1, final Color color2) {
			return new GradientFillBorder() {

				@Override
				protected Color getColor1(Component c, Graphics g) {
					return color1;
				}

				@Override
				protected Color getColor2(Component c, Graphics g) {
					return color2;
				}

				@Override
				protected java.awt.geom.Point2D getPoint1(Component c, Graphics g, int x, int y, int width,
						int height) {
					return from.getPoint1(c, g, x, y, width, height);
				}

				@Override
				protected java.awt.geom.Point2D getPoint2(Component c, Graphics g, int x, int y, int width,
						int height) {
					return To.this.getPoint2(c, g, x, y, width, height);
				}
			};
		}

		protected abstract Point2D getPoint2(Component c, Graphics g, int x, int y, int width, int height);
	}

	public static From from(final Corner corner1) {
		return new From() {
			@Override
			protected Point2D getPoint1(Component c, Graphics g, int x, int y, int width, int height) {
				return corner1.location(new Rectangle(x, y, width, height));
			}
		};
	}

	public static From from(final Side side1) {
		return new From() {
			@Override
			protected Point2D getPoint1(Component c, Graphics g, int x, int y, int width, int height) {
				return Point2D(side1.center(new Rectangle(x, y, width, height)));
			}
		};
	}

	public static From fromAbs(final double x, final double y) {
		return new From() {
			@Override
			protected java.awt.geom.Point2D getPoint1(Component c, Graphics g, int x, int y, int width, int height) {
				return new Point2D.Double(x, y);
			}
		};
	}

	public static From fromCenter() {
		return new From() {
			@Override
			protected Point2D getPoint1(Component c, Graphics g, int x, int y, int width, int height) {
				return new Point2D.Double(x + width / 2.0, y + height / 2.0);
			}
		};
	}

	public static From fromRel(final double xf, final double yf) {
		return new From() {
			@Override
			protected Point2D getPoint1(Component c, Graphics g, int x, int y, int width, int height) {
				return new Point2D.Double(x + width * xf, y + height * yf);
			}
		};
	}

	protected static Point2D Point2D(Point p) {
		return new Point2D.Double(p.x, p.y);
	}

	protected GradientFillBorder() {

	}

	protected abstract Color getColor1(Component c, Graphics g);

	protected abstract Color getColor2(Component c, Graphics g);

	@Override
	public Paint getPaint(Component c, Graphics g, int x, int y, int width, int height) {
		return new GradientPaint(
				getPoint1(c, g, x, y, width, height),
				getColor1(c, g),
				getPoint2(c, g, x, y, width, height),
				getColor2(c, g));
	}

	protected abstract Point2D getPoint1(Component c, Graphics g, int x, int y, int width, int height);

	protected abstract Point2D getPoint2(Component c, Graphics g, int x, int y, int width, int height);
}