RectangleAlignment.java
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2022, by David Gilbert and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library 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 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
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*/
package org.jfree.chart.api;
import java.awt.geom.Rectangle2D;
import org.jfree.chart.internal.Args;
/**
* Used to indicate how to align one rectangle with another rectangle.
*/
public enum RectangleAlignment {
/** Fill the frame */
FILL,
/** Fill the height of the frame. */
FILL_VERTICAL,
/** Fill the width of the frame. */
FILL_HORIZONTAL,
/** Align to the top left of the frame. */
TOP_LEFT,
/** Align to the top of the frame. */
TOP_CENTER,
/** Align to the top right of the frame. */
TOP_RIGHT,
/** Align to the left side of the frame, centered vertically. */
CENTER_LEFT,
/** Align to the center of the frame. */
CENTER,
/** Align to the right side of the frame, centered vertically. */
CENTER_RIGHT,
/** Align to the bottom left of the frame. */
BOTTOM_LEFT,
/** Align to the bottom of the frame. */
BOTTOM_CENTER,
/** Align to the bottom right of the frame. */
BOTTOM_RIGHT;
/**
* Returns the anchor point relative to the specified rectangle.
*
* @param rect the rectangle to align ({@code null} not permitted).
* @param frame the frame to align with ({@code null} not permitted).
*/
public void align(Rectangle2D rect, Rectangle2D frame) {
Args.nullNotPermitted(rect, "rect");
Args.nullNotPermitted(frame, "frame");
double x = rect.getX();
double y = rect.getY();
double w = rect.getWidth();
double h = rect.getHeight();
switch (this) {
case BOTTOM_CENTER:
x = frame.getCenterX() - rect.getWidth() / 2.0;
y = frame.getMaxY() - h;
break;
case BOTTOM_LEFT:
x = frame.getX();
y = frame.getMaxY() - h;
break;
case BOTTOM_RIGHT:
x = frame.getMaxX() - w;
y = frame.getMaxY() - h;
break;
case CENTER:
x = frame.getCenterX() - rect.getWidth() / 2.0;
y = frame.getCenterY() - rect.getHeight() / 2.0;
break;
case FILL:
x = frame.getX();
y = frame.getY();
w = frame.getWidth();
h = frame.getHeight();
break;
case FILL_HORIZONTAL:
x = frame.getX();
w = frame.getWidth();
break;
case FILL_VERTICAL:
y = frame.getY();
h = frame.getHeight();
break;
case CENTER_LEFT:
x = frame.getX();
y = frame.getCenterY() - rect.getHeight() / 2.0;
break;
case CENTER_RIGHT:
x = frame.getMaxX() - w;
y = frame.getCenterY() - rect.getHeight() / 2.0;
break;
case TOP_CENTER:
x = frame.getCenterX() - rect.getWidth() / 2.0;
y = frame.getY();
break;
case TOP_LEFT:
x = frame.getX();
y = frame.getY();
break;
case TOP_RIGHT:
x = frame.getMaxX() - w;
y = frame.getY();
break;
default:
throw new IllegalStateException("Unexpected RectangleAlignment value");
}
rect.setRect(x, y, w, h);
}
}