/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Denis M. Kishenko
* @version $Revision$
*/
package java.awt.geom;
import java.util.NoSuchElementException;
import org.apache.harmony.awt.internal.nls.Messages;
/**
* The Class RoundRectangle2D describes a rectangle with rounded corners with
* high-precision data that is appropriate for geometric operations.
*
* @since Android 1.0
*/
public abstract class RoundRectangle2D extends RectangularShape {
/**
* The Class Float is the subclass of RoundRectangle2D that has all of its
* data values stored with float-level precision.
*
* @since Android 1.0
*/
public static class Float extends RoundRectangle2D {
/**
* The x coordinate of the rectangle's upper left corner.
*/
public float x;
/**
* The y coordinate of the rectangle's upper left corner.
*/
public float y;
/**
* The width of the rectangle.
*/
public float width;
/**
* The height of the rectangle.
*/
public float height;
/**
* The arc width of the rounded corners.
*/
public float arcwidth;
/**
* The arc height of the rounded corners.
*/
public float archeight;
/**
* Instantiates a new float-valued RoundRectangle2D with its data-values
* set to zero.
*/
public Float() {
}
/**
* Instantiates a new float-valued RoundRectangle2D with the specified
* data values.
*
* @param x
* the x coordinate of the rectangle's upper left corner.
* @param y
* the y coordinate of the rectangle's upper left corner.
* @param width
* the width of the rectangle.
* @param height
* the height of the rectangle.
* @param arcwidth
* the arc width of the rounded corners.
* @param archeight
* the arc height of the rounded corners.
*/
public Float(float x, float y, float width, float height, float arcwidth, float archeight) {
setRoundRect(x, y, width, height, arcwidth, archeight);
}
@Override
public double getX() {
return x;
}
@Override
public double getY() {
return y;
}
@Override
public double getWidth() {
return width;
}
@Override
public double getHeight() {
return height;
}
@Override
public double getArcWidth() {
return arcwidth;
}
@Override
public double getArcHeight() {
return archeight;
}
@Override
public boolean isEmpty() {
return width <= 0.0f || height <= 0.0f;
}
/**
* Sets the data of the round rectangle.
*
* @param x
* the x coordinate of the rectangle's upper left corner.
* @param y
* the y coordinate of the rectangle's upper left corner.
* @param width
* the width of the rectangle.
* @param height
* the height of the rectangle.
* @param arcwidth
* the arc width of the rounded corners.
* @param archeight
* the arc height of the rounded corners.
*/
public void setRoundRect(float x, float y, float width, float height, float arcwidth,
float archeight) {
this.x = x;
this.y = y;
this.width = width;
this.height = height;
this.arcwidth = arcwidth;
this.archeight = archeight;
}
@Override
public void setRoundRect(double x, double y, double width, double height, double arcwidth,
double archeight) {
this.x = (float)x;
this.y = (float)y;
this.width = (float)width;
this.height = (float)height;
this.arcwidth = (float)arcwidth;
this.archeight = (float)archeight;
}
@Override
public void setRoundRect(RoundRectangle2D rr) {
this.x = (float)rr.getX();
this.y = (float)rr.getY();
this.width = (float)rr.getWidth();
this.height = (float)rr.getHeight();
this.arcwidth = (float)rr.getArcWidth();
this.archeight = (float)rr.getArcHeight();
}
public Rectangle2D getBounds2D() {
return new Rectangle2D.Float(x, y, width, height);
}
}
/**
* The Class Double is the subclass of RoundRectangle2D that has all of its
* data values stored with double-level precision.
*
* @since Android 1.0
*/
public static class Double extends RoundRectangle2D {
/**
* The x coordinate of the rectangle's upper left corner.
*/
public double x;
/**
* The y coordinate of the rectangle's upper left corner.
*/
public double y;
/**
* The width of the rectangle.
*/
public double width;
/**
* The height of the rectangle.
*/
public double height;
/**
* The arc width of the rounded corners.
*/
public double arcwidth;
/**
* The arc height of the rounded corners.
*/
public double archeight;
/**
* Instantiates a new double-valued RoundRectangle2D with its
* data-values set to zero.
*/
public Double() {
}
/**
* Instantiates a new double-valued RoundRectangle2D with the specified
* data values.
*
* @param x
* the x coordinate of the rectangle's upper left corner.
* @param y
* the y coordinate of the rectangle's upper left corner.
* @param width
* the width of the rectangle.
* @param height
* the height of the rectangle.
* @param arcwidth
* the arc width of the rounded corners.
* @param archeight
* the arc height of the rounded corners.
*/
public Double(double x, double y, double width, double height, double arcwidth,
double archeight) {
setRoundRect(x, y, width, height, arcwidth, archeight);
}
@Override
public double getX() {
return x;
}
@Override
public double getY() {
return y;
}
@Override
public double getWidth() {
return width;
}
@Override
public double getHeight() {
return height;
}
@Override
public double getArcWidth() {
return arcwidth;
}
@Override
public double getArcHeight() {
return archeight;
}
@Override
public boolean isEmpty() {
return width <= 0.0 || height <= 0.0;
}
@Override
public void setRoundRect(double x, double y, double width, double height, double arcwidth,
double archeight) {
this.x = x;
this.y = y;
this.width = width;
this.height = height;
this.arcwidth = arcwidth;
this.archeight = archeight;
}
@Override
public void setRoundRect(RoundRectangle2D rr) {
this.x = rr.getX();
this.y = rr.getY();
this.width = rr.getWidth();
this.height = rr.getHeight();
this.arcwidth = rr.getArcWidth();
this.archeight = rr.getArcHeight();
}
public Rectangle2D getBounds2D() {
return new Rectangle2D.Double(x, y, width, height);
}
}
/*
* RoundRectangle2D path iterator
*/
/**
* The subclass of PathIterator to traverse a RoundRectangle2D.
*/
class Iterator implements PathIterator {
/*
* Path for round corners generated the same way as Ellipse2D
*/
/**
* The coefficient to calculate control points of Bezier curves.
*/
double u = 0.5 - 2.0 / 3.0 * (Math.sqrt(2.0) - 1.0);
/**
* The points coordinates calculation table.
*/
double points[][] = {
{
0.0, 0.5, 0.0, 0.0
}, // MOVETO
{
1.0, -0.5, 0.0, 0.0
}, // LINETO
{
1.0, -u, 0.0, 0.0, // CUBICTO
1.0, 0.0, 0.0, u, 1.0, 0.0, 0.0, 0.5
}, {
1.0, 0.0, 1.0, -0.5
}, // LINETO
{
1.0, 0.0, 1.0, -u, // CUBICTO
1.0, -u, 1.0, 0.0, 1.0, -0.5, 1.0, 0.0
}, {
0.0, 0.5, 1.0, 0.0
}, // LINETO
{
0.0, u, 1.0, 0.0, // CUBICTO
0.0, 0.0, 1.0, -u, 0.0, 0.0, 1.0, -0.5
}, {
0.0, 0.0, 0.0, 0.5
}, // LINETO
{
0.0, 0.0, 0.0, u, // CUBICTO
0.0, u, 0.0, 0.0, 0.0, 0.5, 0.0, 0.0
}
};
/**
* The segment types correspond to points array.
*/
int types[] = {
SEG_MOVETO, SEG_LINETO, SEG_CUBICTO, SEG_LINETO, SEG_CUBICTO, SEG_LINETO,
SEG_CUBICTO, SEG_LINETO, SEG_CUBICTO
};
/**
* The x coordinate of left-upper corner of the round rectangle bounds.
*/
double x;
/**
* The y coordinate of left-upper corner of the round rectangle bounds.
*/
double y;
/**
* The width of the round rectangle bounds.
*/
double width;
/**
* The height of the round rectangle bounds.
*/
double height;
/**
* The width of arc corners of the round rectangle.
*/
double aw;
/**
* The height of arc corners of the round rectangle.
*/
double ah;
/**
* The path iterator transformation.
*/
AffineTransform t;
/**
* The current segment index.
*/
int index;
/**
* Constructs a new RoundRectangle2D.Iterator for given round rectangle
* and transformation.
*
* @param rr
* - the source RoundRectangle2D object
* @param at
* - the AffineTransform object to apply rectangle path
*/
Iterator(RoundRectangle2D rr, AffineTransform at) {
this.x = rr.getX();
this.y = rr.getY();
this.width = rr.getWidth();
this.height = rr.getHeight();
this.aw = Math.min(width, rr.getArcWidth());
this.ah = Math.min(height, rr.getArcHeight());
this.t = at;
if (width < 0.0 || height < 0.0 || aw < 0.0 || ah < 0.0) {
index = points.length;
}
}
public int getWindingRule() {
return WIND_NON_ZERO;
}
public boolean isDone() {
return index > points.length;
}
public void next() {
index++;
}
public int currentSegment(double[] coords) {
if (isDone()) {
// awt.4B=Iterator out of bounds
throw new NoSuchElementException(Messages.getString("awt.4B")); //$NON-NLS-1$
}
if (index == points.length) {
return SEG_CLOSE;
}
int j = 0;
double p[] = points[index];
for (int i = 0; i < p.length; i += 4) {
coords[j++] = x + p[i + 0] * width + p[i + 1] * aw;
coords[j++] = y + p[i + 2] * height + p[i + 3] * ah;
}
if (t != null) {
t.transform(coords, 0, coords, 0, j / 2);
}
return types[index];
}
public int currentSegment(float[] coords) {
if (isDone()) {
// awt.4B=Iterator out of bounds
throw new NoSuchElementException(Messages.getString("awt.4B")); //$NON-NLS-1$
}
if (index == points.length) {
return SEG_CLOSE;
}
int j = 0;
double p[] = points[index];
for (int i = 0; i < p.length; i += 4) {
coords[j++] = (float)(x + p[i + 0] * width + p[i + 1] * aw);
coords[j++] = (float)(y + p[i + 2] * height + p[i + 3] * ah);
}
if (t != null) {
t.transform(coords, 0, coords, 0, j / 2);
}
return types[index];
}
}
/**
* Instantiates a new RoundRectangle2D.
*/
protected RoundRectangle2D() {
}
/**
* Gets the arc width.
*
* @return the arc width.
*/
public abstract double getArcWidth();
/**
* Gets the arc height.
*
* @return the arc height.
*/
public abstract double getArcHeight();
/**
* Sets the data of the RoundRectangle2D.
*
* @param x
* the x coordinate of the rectangle's upper left corner.
* @param y
* the y coordinate of the rectangle's upper left corner.
* @param width
* the width of the rectangle.
* @param height
* the height of the rectangle.
* @param arcWidth
* the arc width of the rounded corners.
* @param arcHeight
* the arc height of the rounded corners.
*/
public abstract void setRoundRect(double x, double y, double width, double height,
double arcWidth, double arcHeight);
/**
* Sets the data of the RoundRectangle2D by copying the values from an
* existing RoundRectangle2D.
*
* @param rr
* the round rectangle to copy the data from.
* @throws NullPointerException
* if rr is null.
*/
public void setRoundRect(RoundRectangle2D rr) {
setRoundRect(rr.getX(), rr.getY(), rr.getWidth(), rr.getHeight(), rr.getArcWidth(), rr
.getArcHeight());
}
@Override
public void setFrame(double x, double y, double width, double height) {
setRoundRect(x, y, width, height, getArcWidth(), getArcHeight());
}
public boolean contains(double px, double py) {
if (isEmpty()) {
return false;
}
double rx1 = getX();
double ry1 = getY();
double rx2 = rx1 + getWidth();
double ry2 = ry1 + getHeight();
if (px < rx1 || px >= rx2 || py < ry1 || py >= ry2) {
return false;
}
double aw = getArcWidth() / 2.0;
double ah = getArcHeight() / 2.0;
double cx, cy;
if (px < rx1 + aw) {
cx = rx1 + aw;
} else if (px > rx2 - aw) {
cx = rx2 - aw;
} else {
return true;
}
if (py < ry1 + ah) {
cy = ry1 + ah;
} else if (py > ry2 - ah) {
cy = ry2 - ah;
} else {
return true;
}
px = (px - cx) / aw;
py = (py - cy) / ah;
return px * px + py * py <= 1.0;
}
public boolean intersects(double rx, double ry, double rw, double rh) {
if (isEmpty() || rw <= 0.0 || rh <= 0.0) {
return false;
}
double x1 = getX();
double y1 = getY();
double x2 = x1 + getWidth();
double y2 = y1 + getHeight();
double rx1 = rx;
double ry1 = ry;
double rx2 = rx + rw;
double ry2 = ry + rh;
if (rx2 < x1 || x2 < rx1 || ry2 < y1 || y2 < ry1) {
return false;
}
double cx = (x1 + x2) / 2.0;
double cy = (y1 + y2) / 2.0;
double nx = cx < rx1 ? rx1 : (cx > rx2 ? rx2 : cx);
double ny = cy < ry1 ? ry1 : (cy > ry2 ? ry2 : cy);
return contains(nx, ny);
}
public boolean contains(double rx, double ry, double rw, double rh) {
if (isEmpty() || rw <= 0.0 || rh <= 0.0) {
return false;
}
double rx1 = rx;
double ry1 = ry;
double rx2 = rx + rw;
double ry2 = ry + rh;
return contains(rx1, ry1) && contains(rx2, ry1) && contains(rx2, ry2) && contains(rx1, ry2);
}
public PathIterator getPathIterator(AffineTransform at) {
return new Iterator(this, at);
}
}
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