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This the original Stanford Karel for Java, packaged for Maven. ACM Library is included. See also https://cs.stanford.edu/people/eroberts/karel-the-robot-learns-java.pdf
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/*
* @(#)GRoundRect.java 1.99.1 08/12/08
*/
// ************************************************************************
// * Copyright (c) 2008 by the Association for Computing Machinery *
// * *
// * The Java Task Force seeks to impose few restrictions on the use of *
// * these packages so that users have as much freedom as possible to *
// * use this software in constructive ways and can make the benefits of *
// * that work available to others. In view of the legal complexities *
// * of software development, however, it is essential for the ACM to *
// * maintain its copyright to guard against attempts by others to *
// * claim ownership rights. The full text of the JTF Software License *
// * is available at the following URL: *
// * *
// * http://www.acm.org/jtf/jtf-software-license.pdf *
// * *
// ************************************************************************
// -- V2.0 --
// Bug fix 26-Apr-07 (ESR, JTFBug 2007-005, reported by Leland Beck)
// 1. Fixed problems with cross-file references to ArcRenderer.
//
// Feature enhancement 26-May-08 (ESR)
// 1. Added support for serialization.
package acm.graphics;
import java.awt.*;
/* Class: GRoundRect */
/**
* The GRoundRect class is a graphical object whose appearance consists
* of a rounded rectangle.
*/
public class GRoundRect extends GRect {
/* Constant: DEFAULT_ARC */
/**
* The default arc diameter used for the corners of a rounded rectangle.
*/
public static final double DEFAULT_ARC = 10;
/* Constructor: GRoundRect(width, height) */
/**
* Constructs a new rounded rectangle with the specified width and height,
* positioned at the origin.
*
* Example: GRoundRect rr = new GRoundRect(width, height);
* @param width The width of the rectangle in pixels
* @param height The height of the rectangle in pixels
*/
public GRoundRect(double width, double height) {
this(0, 0, width, height, DEFAULT_ARC);
}
/* Constructor: GRoundRect(x, y, width, height) */
/**
* Constructs a new rounded rectangle with the specified bounds.
*
* Example: GRoundRect rr = new GRoundRect(x, y, width, height);
* @param x The x-coordinate of the upper left corner
* @param y The y-coordinate of the upper left corner
* @param width The width of the rectangle in pixels
* @param height The height of the rectangle in pixels
*/
public GRoundRect(double x, double y, double width, double height) {
this(x, y, width, height, DEFAULT_ARC);
}
/* Constructor: GRoundRect(x, y, width, height, arcSize) */
/**
* Constructs a new rounded rectangle with the specified bounds and a single
* parameter describing both the describing the curvature at the corners.
*
* Example: GRoundRect rr = new GRoundRect(x, y, width, height, arcSize);
* @param x The x-coordinate of the upper left corner
* @param y The y-coordinate of the upper left corner
* @param width The width of the rectangle in pixels
* @param height The height of the rectangle in pixels
* @param arcSize The diameter of the circle in place at each corner
*/
public GRoundRect(double x, double y, double width, double height,
double arcSize) {
this(x, y, width, height, arcSize, arcSize);
}
/* Constructor: GRoundRect(x, y, width, height, arcWidth, arcHeight) */
/**
* Constructs a new rounded rectangle with the specified bounds and
* arc parameters describing the curvature at the corners.
*
* Example: GRoundRect rr = new GRoundRect(x, y, width, height, arcWidth, arcHeight);
* @param x The x-coordinate of the upper left corner
* @param y The y-coordinate of the upper left corner
* @param width The width of the rectangle in pixels
* @param height The height of the rectangle in pixels
* @param arcWidth The width of the oval in place at each corner
* @param arcHeight The height of the oval in place at each corner
*/
public GRoundRect(double x, double y, double width, double height,
double arcWidth, double arcHeight) {
super(x, y, width, height);
aWidth = arcWidth;
aHeight = arcHeight;
renderer = new GArc(this);
}
/* Method: getArcWidth() */
/**
* Returns the x component of the corner radius.
*
* Example: double arcWidth = rr.getArcWidth();
* @return The x component of the corner radius, in pixels.
*/
public double getArcWidth() {
return aWidth;
}
/* Method: getArcHeight() */
/**
* Returns the y component of the corner radius.
*
* Example: double arcHeight = rr.getArcHeight();
* @return The y component of the corner radius, in pixels.
*/
public double getArcHeight() {
return aHeight;
}
/* Method: paint(g) */
/**
* Implements the paint operation for this graphical object. This method
* is not called directly by clients.
*
*/
public void paint(Graphics g) {
Component comp = getComponent();
if ((comp instanceof GCanvas) && !((GCanvas) comp).getNativeArcFlag()) {
renderer.paint(g);
} else {
Rectangle r = getAWTBounds();
int iArcWidth = GMath.round(aWidth);
int iArcHeight = GMath.round(aHeight);
if (isFilled()) {
g.setColor(getFillColor());
g.fillRoundRect(r.x, r.y, r.width, r.height, iArcWidth, iArcHeight);
g.setColor(getColor());
}
g.drawRoundRect(r.x, r.y, r.width, r.height, iArcWidth, iArcHeight);
}
}
/* Private instance variables */
private double aWidth, aHeight;
private GArc renderer;
/* Serial version UID */
/**
* The serialization code for this class. This value should be incremented
* whenever you change the structure of this class in an incompatible way,
* typically by adding a new instance variable.
*/
static final long serialVersionUID = 1L;
}