com.sun.javafx.geom.RoundRectangle2D Maven / Gradle / Ivy
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* published by the Free Software Foundation. Oracle designates this
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* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package com.sun.javafx.geom;
import com.sun.javafx.geom.transform.BaseTransform;
/**
* The RoundRectangle2D class defines a rectangle with
* rounded corners defined by a location {@code (x,y)}, a
* dimension {@code (w x h)}, and the width and height of an arc
* with which to round the corners.
*
* @version 1.29, 05/05/07
*/
public class RoundRectangle2D extends RectangularShape {
/**
* The X coordinate of this RoundRectangle2D.
*/
public float x;
/**
* The Y coordinate of this RoundRectangle2D.
*/
public float y;
/**
* The width of this RoundRectangle2D.
*/
public float width;
/**
* The height of this RoundRectangle2D.
*/
public float height;
/**
* The width of the arc that rounds off the corners.
*/
public float arcWidth;
/**
* The height of the arc that rounds off the corners.
*/
public float arcHeight;
/**
* Constructs a new RoundRectangle2D, initialized to
* location (0.0, 0.0), size (0.0, 0.0), and corner arcs
* of radius 0.0.
*/
public RoundRectangle2D() {
}
/**
* Constructs and initializes a RoundRectangle2D
* from the specified float coordinates.
*
* @param x the X coordinate of the newly
* constructed RoundRectangle2D
* @param y the Y coordinate of the newly
* constructed RoundRectangle2D
* @param w the width to which to set the newly
* constructed RoundRectangle2D
* @param h the height to which to set the newly
* constructed RoundRectangle2D
* @param arcw the width of the arc to use to round off the
* corners of the newly constructed
* RoundRectangle2D
* @param arch the height of the arc to use to round off the
* corners of the newly constructed
* RoundRectangle2D
*/
public RoundRectangle2D(float x, float y, float w, float h, float arcw, float arch) {
setRoundRect(x, y, w, h, arcw, arch);
}
/**
* {@inheritDoc}
*/
@Override
public float getX() {
return x;
}
/**
* {@inheritDoc}
*/
@Override
public float getY() {
return y;
}
/**
* {@inheritDoc}
*/
@Override
public float getWidth() {
return width;
}
/**
* {@inheritDoc}
*/
@Override
public float getHeight() {
return height;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isEmpty() {
return (width <= 0.0f) || (height <= 0.0f);
}
/**
* Sets the location, size, and corner radii of this
* RoundRectangle2D to the specified
* float values.
*
* @param x the X coordinate to which to set the
* location of this RoundRectangle2D
* @param y the Y coordinate to which to set the
* location of this RoundRectangle2D
* @param w the width to which to set this
* RoundRectangle2D
* @param h the height to which to set this
* RoundRectangle2D
* @param arcw the width to which to set the arc of this
* RoundRectangle2D
* @param arch the height to which to set the arc of this
* RoundRectangle2D
*/
public void setRoundRect(float x, float y, float w, float h,
float arcw, float arch)
{
this.x = x;
this.y = y;
this.width = w;
this.height = h;
this.arcWidth = arcw;
this.arcHeight = arch;
}
/**
* {@inheritDoc}
*/
@Override
public RectBounds getBounds() {
return new RectBounds(x, y, x + width, y + height);
}
/**
* Sets this RoundRectangle2D to be the same as the
* specified RoundRectangle2D.
* @param rr the specified RoundRectangle2D
*/
public void setRoundRect(RoundRectangle2D rr) {
setRoundRect(rr.x, rr.y, rr.width, rr.height, rr.arcWidth, rr.arcHeight);
}
/**
* {@inheritDoc}
*/
@Override
public void setFrame(float x, float y, float w, float h) {
setRoundRect(x, y, w, h, this.arcWidth, this.arcHeight);
}
/**
* {@inheritDoc}
*/
@Override
public boolean contains(float x, float y) {
if (isEmpty()) { return false; }
float rrx0 = this.x;
float rry0 = this.y;
float rrx1 = rrx0 + this.width;
float rry1 = rry0 + this.height;
// Check for trivial rejection - point is outside bounding rectangle
if (x < rrx0 || y < rry0 || x >= rrx1 || y >= rry1) {
return false;
}
float aw = Math.min(this.width, Math.abs(this.arcWidth)) / 2f;
float ah = Math.min(this.height, Math.abs(this.arcHeight)) / 2f;
// Check which corner point is in and do circular containment
// test - otherwise simple acceptance
if (x >= (rrx0 += aw) && x < (rrx0 = rrx1 - aw)) {
return true;
}
if (y >= (rry0 += ah) && y < (rry0 = rry1 - ah)) {
return true;
}
x = (x - rrx0) / aw;
y = (y - rry0) / ah;
return (x * x + y * y <= 1.0);
}
private int classify(float coord, float left, float right, float arcsize) {
if (coord < left) {
return 0;
} else if (coord < left + arcsize) {
return 1;
} else if (coord < right - arcsize) {
return 2;
} else if (coord < right) {
return 3;
} else {
return 4;
}
}
/**
* {@inheritDoc}
*/
@Override
public boolean intersects(float x, float y, float w, float h) {
if (isEmpty() || w <= 0 || h <= 0) {
return false;
}
float rrx0 = this.x;
float rry0 = this.y;
float rrx1 = rrx0 + this.width;
float rry1 = rry0 + this.height;
// Check for trivial rejection - bounding rectangles do not intersect
if (x + w <= rrx0 || x >= rrx1 || y + h <= rry0 || y >= rry1) {
return false;
}
float aw = Math.min(this.width, Math.abs(this.arcWidth)) / 2f;
float ah = Math.min(this.height, Math.abs(this.arcHeight)) / 2f;
int x0class = classify(x, rrx0, rrx1, aw);
int x1class = classify(x + w, rrx0, rrx1, aw);
int y0class = classify(y, rry0, rry1, ah);
int y1class = classify(y + h, rry0, rry1, ah);
// Trivially accept if any point is inside inner rectangle
if (x0class == 2 || x1class == 2 || y0class == 2 || y1class == 2) {
return true;
}
// Trivially accept if either edge spans inner rectangle
if ((x0class < 2 && x1class > 2) || (y0class < 2 && y1class > 2)) {
return true;
}
// Since neither edge spans the center, then one of the corners
// must be in one of the rounded edges. We detect this case if
// a [xy]0class is 3 or a [xy]1class is 1. One of those two cases
// must be true for each direction.
// We now find a "nearest point" to test for being inside a rounded
// corner.
x = (x1class == 1) ? (x = x + w - (rrx0 + aw)) : (x = x - (rrx1 - aw));
y = (y1class == 1) ? (y = y + h - (rry0 + ah)) : (y = y - (rry1 - ah));
x = x / aw;
y = y / ah;
return (x * x + y * y <= 1f);
}
/**
* {@inheritDoc}
*/
@Override
public boolean contains(float x, float y, float w, float h) {
if (isEmpty() || w <= 0 || h <= 0) {
return false;
}
return (contains(x, y) &&
contains(x + w, y) &&
contains(x, y + h) &&
contains(x + w, y + h));
}
/**
* Returns an iteration object that defines the boundary of this
* RoundRectangle2D.
* The iterator for this class is multi-threaded safe, which means
* that this RoundRectangle2D class guarantees that
* modifications to the geometry of this RoundRectangle2D
* object do not affect any iterations of that geometry that
* are already in process.
* @param tx an optional BaseTransform to be applied to
* the coordinates as they are returned in the iteration, or
* null if untransformed coordinates are desired
* @return the PathIterator object that returns the
* geometry of the outline of this
* RoundRectangle2D, one segment at a time.
*/
@Override
public PathIterator getPathIterator(BaseTransform tx) {
return new RoundRectIterator(this, tx);
}
@Override
public RoundRectangle2D copy() {
return new RoundRectangle2D(x, y, width, height, arcWidth, arcHeight);
}
/**
* Returns the hashcode for this RoundRectangle2D.
* @return the hashcode for this RoundRectangle2D.
*/
@Override
public int hashCode() {
int bits = java.lang.Float.floatToIntBits(x);
bits += java.lang.Float.floatToIntBits(y) * 37;
bits += java.lang.Float.floatToIntBits(width) * 43;
bits += java.lang.Float.floatToIntBits(height) * 47;
bits += java.lang.Float.floatToIntBits(arcWidth) * 53;
bits += java.lang.Float.floatToIntBits(arcHeight) * 59;
return bits;
}
/**
* Determines whether or not the specified Object is
* equal to this RoundRectangle2D. The specified
* Object is equal to this RoundRectangle2D
* if it is an instance of RoundRectangle2D and if its
* location, size, and corner arc dimensions are the same as this
* RoundRectangle2D.
* @param obj an Object to be compared with this
* RoundRectangle2D.
* @return true if obj is an instance
* of RoundRectangle2D and has the same values;
* false otherwise.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (obj instanceof RoundRectangle2D) {
RoundRectangle2D rr2d = (RoundRectangle2D) obj;
return ((x == rr2d.x) &&
(y == rr2d.y) &&
(width == rr2d.width) &&
(height == rr2d.height) &&
(arcWidth == rr2d.arcWidth) &&
(arcHeight == rr2d.arcHeight));
}
return false;
}
}
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