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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/geom/RoundRectangle2D.java | |
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Diffstat (limited to 'libjava/classpath/java/awt/geom/RoundRectangle2D.java')
-rw-r--r-- | libjava/classpath/java/awt/geom/RoundRectangle2D.java | 584 |
1 files changed, 584 insertions, 0 deletions
diff --git a/libjava/classpath/java/awt/geom/RoundRectangle2D.java b/libjava/classpath/java/awt/geom/RoundRectangle2D.java new file mode 100644 index 000000000..19a7b4237 --- /dev/null +++ b/libjava/classpath/java/awt/geom/RoundRectangle2D.java @@ -0,0 +1,584 @@ +/* RoundRectangle2D.java -- represents a rectangle with rounded corners + Copyright (C) 2000, 2002, 2003, 2004, 2006, Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath 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, or (at your option) +any later version. + +GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.awt.geom; + + + +/** This class implements a rectangle with rounded corners. + * @author Tom Tromey (tromey@cygnus.com) + * @date December 3, 2000 + */ +public abstract class RoundRectangle2D extends RectangularShape +{ + /** + * Return the arc height of this round rectangle. The arc height and width + * control the roundness of the corners of the rectangle. + * + * @return The arc height. + * + * @see #getArcWidth() + */ + public abstract double getArcHeight(); + + /** + * Return the arc width of this round rectangle. The arc width and height + * control the roundness of the corners of the rectangle. + * + * @return The arc width. + * + * @see #getArcHeight() + */ + public abstract double getArcWidth(); + + /** + * Set the values of this round rectangle. + * + * @param x The x coordinate + * @param y The y coordinate + * @param w The width + * @param h The height + * @param arcWidth The arc width + * @param arcHeight The arc height + */ + public abstract void setRoundRect(double x, double y, double w, double h, + double arcWidth, double arcHeight); + + /** + * Create a RoundRectangle2D. This is protected because this class + * is abstract and cannot be instantiated. + */ + protected RoundRectangle2D() + { + } + + /** + * Return true if this object contains the specified point. + * @param x The x coordinate + * @param y The y coordinate + */ + public boolean contains(double x, double y) + { + double mx = getX(); + double mw = getWidth(); + if (x < mx || x >= mx + mw) + return false; + double my = getY(); + double mh = getHeight(); + if (y < my || y >= my + mh) + return false; + + // Now check to see if the point is in range of an arc. + double dy = Math.min(Math.abs(my - y), Math.abs(my + mh - y)); + double dx = Math.min(Math.abs(mx - x), Math.abs(mx + mw - x)); + + // The arc dimensions are that of the corresponding ellipse + // thus a 90 degree segment is half of that. + double aw = getArcWidth() / 2.0; + double ah = getArcHeight() / 2.0; + if (dx > aw || dy > ah) + return true; + + // At this point DX represents the distance from the nearest edge + // of the rectangle. But we want to transform it to represent the + // scaled distance from the center of the ellipse that forms the + // arc. Hence this code: + dy = (ah - dy) / ah; + dx = (aw - dx) / aw; + + return dx * dx + dy * dy <= 1.0; + } + + /** + * Return true if this object contains the specified rectangle + * @param x The x coordinate + * @param y The y coordinate + * @param w The width + * @param h The height + */ + public boolean contains(double x, double y, double w, double h) + { + // We have to check all four points here (for ordinary rectangles + // we can just check opposing corners). + return (contains(x, y) && contains(x, y + h) && contains(x + w, y + h) + && contains(x + w, y)); + } + + /** + * Return a new path iterator which iterates over this rectangle. + * + * @param at An affine transform to apply to the object + */ + public PathIterator getPathIterator(final AffineTransform at) + { + double arcW = Math.min(getArcWidth(), getWidth()); + double arcH = Math.min(getArcHeight(), getHeight()); + + // check for special cases... + if (arcW <= 0 || arcH <= 0) + { + Rectangle2D r = new Rectangle2D.Double(getX(), getY(), getWidth(), + getHeight()); + return r.getPathIterator(at); + } + else if (arcW >= getWidth() && arcH >= getHeight()) + { + Ellipse2D e = new Ellipse2D.Double(getX(), getY(), getWidth(), + getHeight()); + return e.getPathIterator(at); + } + + // otherwise return the standard case... + return new PathIterator() + { + double x = getX(); + double y = getY(); + double w = getWidth(); + double h = getHeight(); + double arcW = Math.min(getArcWidth(), w); + double arcH = Math.min(getArcHeight(), h); + Arc2D.Double arc = new Arc2D.Double(); + PathIterator corner; + int step = -1; + + public int currentSegment(double[] coords) + { + if (corner != null) // steps 1, 3, 5 and 7 + { + int r = corner.currentSegment(coords); + if (r == SEG_MOVETO) + r = SEG_LINETO; + return r; + } + if (step == -1) + { + // move to the start position + coords[0] = x + w - arcW / 2; + coords[1] = y; + } + else if (step == 0) + { + // top line + coords[0] = x + arcW / 2; + coords[1] = y; + } + else if (step == 2) + { + // left line + coords[0] = x; + coords[1] = y + h - arcH / 2; + } + else if (step == 4) + { + // bottom line + coords[0] = x + w - arcW / 2; + coords[1] = y + h; + } + else if (step == 6) + { + // right line + coords[0] = x + w; + coords[1] = y + arcH / 2; + } + if (at != null) + at.transform(coords, 0, coords, 0, 1); + return step == -1 ? SEG_MOVETO : SEG_LINETO; + } + + public int currentSegment(float[] coords) { + if (corner != null) // steps 1, 3, 5 and 7 + { + int r = corner.currentSegment(coords); + if (r == SEG_MOVETO) + r = SEG_LINETO; + return r; + } + if (step == -1) + { + // move to the start position + coords[0] = (float) (x + w - arcW / 2); + coords[1] = (float) y; + } + else if (step == 0) + { + // top line + coords[0] = (float) (x + arcW / 2); + coords[1] = (float) y; + } + else if (step == 2) + { + // left line + coords[0] = (float) x; + coords[1] = (float) (y + h - arcH / 2); + } + else if (step == 4) + { + // bottom line + coords[0] = (float) (x + w - arcW / 2); + coords[1] = (float) (y + h); + } + else if (step == 6) + { + // right line + coords[0] = (float) (x + w); + coords[1] = (float) (y + arcH / 2); + } + if (at != null) + at.transform(coords, 0, coords, 0, 1); + return step == -1 ? SEG_MOVETO : SEG_LINETO; + } + + public int getWindingRule() { + return WIND_NON_ZERO; + } + + public boolean isDone() { + return step >= 8; + } + + public void next() + { + if (corner != null) + { + corner.next(); + if (corner.isDone()) + { + corner = null; + step++; + } + } + else + { + step++; + if (step == 1) + { + // create top left corner + arc.setArc(x, y, arcW, arcH, 90, 90, Arc2D.OPEN); + corner = arc.getPathIterator(at); + } + else if (step == 3) + { + // create bottom left corner + arc.setArc(x, y + h - arcH, arcW, arcH, 180, 90, + Arc2D.OPEN); + corner = arc.getPathIterator(at); + } + else if (step == 5) + { + // create bottom right corner + arc.setArc(x + w - arcW, y + h - arcH, arcW, arcH, 270, 90, + Arc2D.OPEN); + corner = arc.getPathIterator(at); + } + else if (step == 7) + { + // create top right corner + arc.setArc(x + w - arcW, y, arcW, arcH, 0, 90, Arc2D.OPEN); + corner = arc.getPathIterator(at); + } + } + } + }; + } + + /** + * Return true if the given rectangle intersects this shape. + * @param x The x coordinate + * @param y The y coordinate + * @param w The width + * @param h The height + */ + public boolean intersects(double x, double y, double w, double h) + { + // Check if any corner is within the rectangle + return (contains(x, y) || contains(x, y + h) || contains(x + w, y + h) + || contains(x + w, y)); + } + + /** + * Set the boundary of this round rectangle. + * @param x The x coordinate + * @param y The y coordinate + * @param w The width + * @param h The height + */ + public void setFrame(double x, double y, double w, double h) + { + // This is a bit lame. + setRoundRect(x, y, w, h, getArcWidth(), getArcHeight()); + } + + /** + * Set the values of this round rectangle to be the same as those + * of the argument. + * @param rr The round rectangle to copy + */ + public void setRoundRect(RoundRectangle2D rr) + { + setRoundRect(rr.getX(), rr.getY(), rr.getWidth(), rr.getHeight(), + rr.getArcWidth(), rr.getArcHeight()); + } + + /** + * A subclass of RoundRectangle which keeps its parameters as + * doubles. + */ + public static class Double extends RoundRectangle2D + { + /** The height of the corner arc. */ + public double archeight; + + /** The width of the corner arc. */ + public double arcwidth; + + /** The x coordinate of this object. */ + public double x; + + /** The y coordinate of this object. */ + public double y; + + /** The width of this object. */ + public double width; + + /** The height of this object. */ + public double height; + + /** + * Construct a new instance, with all parameters set to 0. + */ + public Double() + { + } + + /** + * Construct a new instance with the given arguments. + * @param x The x coordinate + * @param y The y coordinate + * @param w The width + * @param h The height + * @param arcWidth The arc width + * @param arcHeight The arc height + */ + public Double(double x, double y, double w, double h, double arcWidth, + double arcHeight) + { + this.x = x; + this.y = y; + this.width = w; + this.height = h; + this.arcwidth = arcWidth; + this.archeight = arcHeight; + } + + public double getArcHeight() + { + return archeight; + } + + public double getArcWidth() + { + return arcwidth; + } + + public Rectangle2D getBounds2D() + { + return new Rectangle2D.Double(x, y, width, height); + } + + public double getX() + { + return x; + } + + public double getY() + { + return y; + } + + public double getWidth() + { + return width; + } + + public double getHeight() + { + return height; + } + + public boolean isEmpty() + { + return width <= 0 || height <= 0; + } + + public void setRoundRect(double x, double y, double w, double h, + double arcWidth, double arcHeight) + { + this.x = x; + this.y = y; + this.width = w; + this.height = h; + this.arcwidth = arcWidth; + this.archeight = arcHeight; + } + } // class Double + + /** + * A subclass of RoundRectangle which keeps its parameters as + * floats. + */ + public static class Float extends RoundRectangle2D + { + /** The height of the corner arc. */ + public float archeight; + + /** The width of the corner arc. */ + public float arcwidth; + + /** The x coordinate of this object. */ + public float x; + + /** The y coordinate of this object. */ + public float y; + + /** The width of this object. */ + public float width; + + /** The height of this object. */ + public float height; + + /** + * Construct a new instance, with all parameters set to 0. + */ + public Float() + { + } + + /** + * Construct a new instance with the given arguments. + * @param x The x coordinate + * @param y The y coordinate + * @param w The width + * @param h The height + * @param arcWidth The arc width + * @param arcHeight The arc height + */ + public Float(float x, float y, float w, float h, float arcWidth, + float arcHeight) + { + this.x = x; + this.y = y; + this.width = w; + this.height = h; + this.arcwidth = arcWidth; + this.archeight = arcHeight; + } + + public double getArcHeight() + { + return archeight; + } + + public double getArcWidth() + { + return arcwidth; + } + + public Rectangle2D getBounds2D() + { + return new Rectangle2D.Float(x, y, width, height); + } + + public double getX() + { + return x; + } + + public double getY() + { + return y; + } + + public double getWidth() + { + return width; + } + + public double getHeight() + { + return height; + } + + public boolean isEmpty() + { + return width <= 0 || height <= 0; + } + + /** + * Sets the dimensions for this rounded rectangle. + * + * @param x the x-coordinate of the top left corner. + * @param y the y-coordinate of the top left corner. + * @param w the width of the rectangle. + * @param h the height of the rectangle. + * @param arcWidth the arc width. + * @param arcHeight the arc height. + * + * @see #setRoundRect(double, double, double, double, double, double) + */ + public void setRoundRect(float x, float y, float w, float h, + float arcWidth, float arcHeight) + { + this.x = x; + this.y = y; + this.width = w; + this.height = h; + this.arcwidth = arcWidth; + this.archeight = arcHeight; + } + + public void setRoundRect(double x, double y, double w, double h, + double arcWidth, double arcHeight) + { + this.x = (float) x; + this.y = (float) y; + this.width = (float) w; + this.height = (float) h; + this.arcwidth = (float) arcWidth; + this.archeight = (float) arcHeight; + } + } // class Float +} // class RoundRectangle2D |