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/* RoundRectangle2D.java -- represents a rectangle with rounded corners |
/* RoundRectangle2D.java -- represents a rectangle with rounded corners |
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Copyright (C) 2000, 2002, 2003 Free Software Foundation |
Copyright (C) 2000, 2002, 2003, 2004 Free Software Foundation |
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This file is part of GNU Classpath. |
This file is part of GNU Classpath. |
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import java.util.NoSuchElementException; |
import java.util.NoSuchElementException; |
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/** This class implements a rectangle with rounded corners. |
/** This class implements a rectangle with rounded corners. |
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* @author Tom Tromey <tromey@cygnus.com> |
* @author Tom Tromey <tromey@cygnus.com> |
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* @date December 3, 2000 |
* @date December 3, 2000 |
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* @param arcHeight The arc height |
* @param arcHeight The arc height |
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*/ |
*/ |
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public abstract void setRoundRect(double x, double y, double w, double h, |
public abstract void setRoundRect(double x, double y, double w, double h, |
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double arcWidth, double arcHeight); |
double arcWidth, double arcHeight); |
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/** Create a RoundRectangle2D. This is protected because this class |
/** Create a RoundRectangle2D. This is protected because this class |
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* is abstract and cannot be instantiated. |
* is abstract and cannot be instantiated. |
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*/ |
*/ |
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protected RoundRectangle2D() |
protected RoundRectangle2D() |
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{ |
{ |
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} |
} |
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// Now check to see if the point is in range of an arc. |
// Now check to see if the point is in range of an arc. |
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double dy = Math.min(Math.abs(my - y), Math.abs(my + mh - y)); |
double dy = Math.min(Math.abs(my - y), Math.abs(my + mh - y)); |
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double dx = Math.min(Math.abs(mx - x), Math.abs(mx + mw - x)); |
double dx = Math.min(Math.abs(mx - x), Math.abs(mx + mw - x)); |
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double aw = getArcWidth(); |
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double ah = getArcHeight(); |
// The arc dimensions are that of the corresponding ellipse |
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// thus a 90 degree segment is half of that. |
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double aw = getArcWidth() / 2.0; |
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double ah = getArcHeight() / 2.0; |
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if (dx > aw || dy > ah) |
if (dx > aw || dy > ah) |
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return true; |
return true; |
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{ |
{ |
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// We have to check all four points here (for ordinary rectangles |
// We have to check all four points here (for ordinary rectangles |
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// we can just check opposing corners). |
// we can just check opposing corners). |
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return (contains(x, y) && contains(x + w, h) |
return (contains(x, y) && contains(x, y + h) && contains(x + w, y + h) |
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&& contains(x, y + h) && contains(x + w, y + h)); |
&& contains(x + w, y)); |
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} |
} |
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/** Return a new path iterator which iterates over this rectangle. |
/** Return a new path iterator which iterates over this rectangle. |
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final double arcwidth = getArcWidth(); |
final double arcwidth = getArcWidth(); |
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final double archeight = getArcHeight(); |
final double archeight = getArcHeight(); |
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return new PathIterator() |
return new PathIterator() |
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{ |
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/** We iterate clockwise around the rectangle, starting in the |
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* upper left. This variable tracks our current point, which |
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* can be on either side of a given corner. */ |
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private int current = 0; |
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/** Child path iterator, used for corners. */ |
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private PathIterator corner; |
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/** This is used when rendering the corners. We re-use the arc |
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* for each corner. */ |
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private Arc2D arc = new Arc2D.Double(); |
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/** Temporary array used by getPoint. */ |
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private double[] temp = new double[2]; |
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public int getWindingRule() |
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{ |
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return WIND_NON_ZERO; |
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} |
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public boolean isDone() |
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{ |
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return current > 9; |
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} |
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private void getPoint(int val) |
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{ |
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switch (val) |
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{ |
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case 0: |
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case 8: |
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temp[0] = minx; |
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temp[1] = miny + archeight; |
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break; |
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case 1: |
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temp[0] = minx + arcwidth; |
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temp[1] = miny; |
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break; |
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case 2: |
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temp[0] = maxx - arcwidth; |
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temp[1] = maxy; |
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break; |
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case 3: |
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temp[0] = maxx; |
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temp[1] = miny + archeight; |
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break; |
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case 4: |
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temp[0] = maxx; |
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temp[1] = maxy - archeight; |
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break; |
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case 5: |
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temp[0] = maxx - arcwidth; |
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temp[1] = maxy; |
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break; |
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case 6: |
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temp[0] = minx + arcwidth; |
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temp[1] = maxy; |
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break; |
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case 7: |
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temp[0] = minx; |
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temp[1] = maxy - archeight; |
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break; |
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} |
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} |
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public void next() |
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{ |
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if (current >= 8) |
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++current; |
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else if (corner != null) |
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{ |
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// We're iterating through the corner. Work on the child |
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// iterator; if it finishes, reset and move to the next |
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// point along the rectangle. |
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corner.next(); |
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if (corner.isDone()) |
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{ |
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corner = null; |
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++current; |
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} |
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} |
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else |
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{ |
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// Make an arc between this point on the rectangle and |
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// the next one, and then iterate over this arc. |
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getPoint(current); |
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double x1 = temp[0]; |
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double y1 = temp[1]; |
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getPoint(current + 1); |
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arc.setFrameFromDiagonal(x1, y1, temp[0], temp[1]); |
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arc.setAngles(x1, y1, temp[0], temp[1]); |
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corner = arc.getPathIterator(at); |
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} |
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} |
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public int currentSegment(float[] coords) |
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{ |
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if (corner != null) |
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{ |
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int r = corner.currentSegment(coords); |
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if (r == SEG_MOVETO) |
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r = SEG_LINETO; |
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return r; |
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} |
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if (current < 9) |
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{ |
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getPoint(current); |
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coords[0] = (float) temp[0]; |
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coords[1] = (float) temp[1]; |
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} |
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else if (current == 9) |
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return SEG_CLOSE; |
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else |
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throw new NoSuchElementException("rect iterator out of bounds"); |
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if (at != null) |
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at.transform(coords, 0, coords, 0, 1); |
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return current == 0 ? SEG_MOVETO : SEG_LINETO; |
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} |
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public int currentSegment(double[] coords) |
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{ |
{ |
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if (corner != null) |
/** We iterate counterclockwise around the rectangle, starting in the |
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{ |
* upper right. This variable tracks our current point, which |
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int r = corner.currentSegment(coords); |
* can be on either side of a given corner. */ |
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if (r == SEG_MOVETO) |
private int current = 0; |
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r = SEG_LINETO; |
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return r; |
/** Child path iterator, used for corners. */ |
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} |
private PathIterator corner; |
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if (current < 9) |
/** This is used when rendering the corners. We re-use the arc |
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{ |
* for each corner. */ |
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getPoint(current); |
private Arc2D arc = new Arc2D.Double(); |
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coords[0] = temp[0]; |
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coords[1] = temp[1]; |
/** Temporary array used by getPoint. */ |
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} |
private double[] temp = new double[2]; |
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else if (current == 9) |
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return SEG_CLOSE; |
public int getWindingRule() |
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else |
{ |
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throw new NoSuchElementException("rect iterator out of bounds"); |
return WIND_NON_ZERO; |
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} |
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if (at != null) |
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at.transform(coords, 0, coords, 0, 1); |
public boolean isDone() |
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return current == 0 ? SEG_MOVETO : SEG_LINETO; |
{ |
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} |
return current > 9; |
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}; |
} |
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private void getPoint(int val) |
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{ |
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switch (val) |
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{ |
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case 0: |
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case 8: |
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temp[0] = maxx; |
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temp[1] = miny + archeight; |
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break; |
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case 7: |
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temp[0] = maxx; |
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temp[1] = maxy - archeight; |
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break; |
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case 6: |
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temp[0] = maxx - arcwidth; |
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temp[1] = maxy; |
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break; |
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case 5: |
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temp[0] = minx + arcwidth; |
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temp[1] = maxy; |
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break; |
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case 4: |
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temp[0] = minx; |
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temp[1] = maxy - archeight; |
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break; |
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case 3: |
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temp[0] = minx; |
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temp[1] = miny + archeight; |
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break; |
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case 2: |
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temp[0] = minx + arcwidth; |
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temp[1] = miny; |
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break; |
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case 1: |
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temp[0] = maxx - arcwidth; |
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temp[1] = miny; |
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break; |
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} |
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} |
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public void next() |
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{ |
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if (current >= 8) |
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++current; |
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else if (corner != null) |
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{ |
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// We're iterating through the corner. Work on the child |
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// iterator; if it finishes, reset and move to the next |
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// point along the rectangle. |
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corner.next(); |
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if (corner.isDone()) |
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{ |
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corner = null; |
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++current; |
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} |
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} |
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else |
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{ |
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// Make an arc between this point on the rectangle and |
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// the next one, and then iterate over this arc. |
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getPoint(current); |
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double x1 = temp[0]; |
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double y1 = temp[1]; |
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getPoint(current + 1); |
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Rectangle2D.Double r = new Rectangle2D.Double(Math.min(x1, |
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temp[0]), |
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Math.min(y1, |
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temp[1]), |
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Math.abs(x1 |
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- temp[0]), |
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Math.abs(y1 |
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- temp[1])); |
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arc.setArc(r, (current >> 1) * 90.0, 90.0, Arc2D.OPEN); |
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corner = arc.getPathIterator(at); |
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} |
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} |
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public int currentSegment(float[] coords) |
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{ |
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if (corner != null) |
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{ |
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int r = corner.currentSegment(coords); |
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if (r == SEG_MOVETO) |
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r = SEG_LINETO; |
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return r; |
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} |
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if (current < 9) |
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{ |
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getPoint(current); |
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coords[0] = (float) temp[0]; |
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coords[1] = (float) temp[1]; |
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} |
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else if (current == 9) |
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return SEG_CLOSE; |
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else |
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throw new NoSuchElementException("rect iterator out of bounds"); |
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if (at != null) |
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at.transform(coords, 0, coords, 0, 1); |
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return current == 0 ? SEG_MOVETO : SEG_LINETO; |
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} |
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public int currentSegment(double[] coords) |
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{ |
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if (corner != null) |
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{ |
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int r = corner.currentSegment(coords); |
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if (r == SEG_MOVETO) |
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r = SEG_LINETO; |
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return r; |
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} |
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if (current < 9) |
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{ |
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getPoint(current); |
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coords[0] = temp[0]; |
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coords[1] = temp[1]; |
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} |
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else if (current == 9) |
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return SEG_CLOSE; |
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else |
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throw new NoSuchElementException("rect iterator out of bounds"); |
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if (at != null) |
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at.transform(coords, 0, coords, 0, 1); |
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return current == 0 ? SEG_MOVETO : SEG_LINETO; |
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} |
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}; |
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} |
} |
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/** Return true if the given rectangle intersects this shape. |
/** Return true if the given rectangle intersects this shape. |
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*/ |
*/ |
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public boolean intersects(double x, double y, double w, double h) |
public boolean intersects(double x, double y, double w, double h) |
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{ |
{ |
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// Here we can use the same code we use for an ordinary rectangle. |
// Check if any corner is within the rectangle |
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double mx = getX(); |
return (contains(x, y) || contains(x, y + h) || contains(x + w, y + h) |
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double mw = getWidth(); |
|| contains(x + w, y)); |
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if (x < mx || x >= mx + mw || x + w < mx || x + w >= mx + mw) |
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return false; |
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double my = getY(); |
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double mh = getHeight(); |
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return y >= my && y < my + mh && y + h >= my && y + h < my + mh; |
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} |
} |
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/** Set the boundary of this round rectangle. |
/** Set the boundary of this round rectangle. |
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public void setRoundRect(RoundRectangle2D rr) |
public void setRoundRect(RoundRectangle2D rr) |
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{ |
{ |
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setRoundRect(rr.getX(), rr.getY(), rr.getWidth(), rr.getHeight(), |
setRoundRect(rr.getX(), rr.getY(), rr.getWidth(), rr.getHeight(), |
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rr.getArcWidth(), rr.getArcHeight()); |
rr.getArcWidth(), rr.getArcHeight()); |
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} |
} |
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/** A subclass of RoundRectangle which keeps its parameters as |
/** A subclass of RoundRectangle which keeps its parameters as |
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* @param arcWidth The arc width |
* @param arcWidth The arc width |
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* @param arcHeight The arc height |
* @param arcHeight The arc height |
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*/ |
*/ |
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public Double(double x, double y, double w, double h, |
public Double(double x, double y, double w, double h, double arcWidth, |
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double arcWidth, double arcHeight) |
double arcHeight) |
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{ |
{ |
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this.x = x; |
this.x = x; |
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this.y = y; |
this.y = y; |
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} |
} |
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public void setRoundRect(double x, double y, double w, double h, |
public void setRoundRect(double x, double y, double w, double h, |
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double arcWidth, double arcHeight) |
double arcWidth, double arcHeight) |
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{ |
{ |
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this.x = x; |
this.x = x; |
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this.y = y; |
this.y = y; |
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* @param arcWidth The arc width |
* @param arcWidth The arc width |
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* @param arcHeight The arc height |
* @param arcHeight The arc height |
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*/ |
*/ |
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public Float(float x, float y, float w, float h, |
public Float(float x, float y, float w, float h, float arcWidth, |
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float arcWidth, float arcHeight) |
float arcHeight) |
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{ |
{ |
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this.x = x; |
this.x = x; |
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this.y = y; |
this.y = y; |
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} |
} |
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public void setRoundRect(float x, float y, float w, float h, |
public void setRoundRect(float x, float y, float w, float h, |
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float arcWidth, float arcHeight) |
float arcWidth, float arcHeight) |
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{ |
{ |
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this.x = x; |
this.x = x; |
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this.y = y; |
this.y = y; |
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} |
} |
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public void setRoundRect(double x, double y, double w, double h, |
public void setRoundRect(double x, double y, double w, double h, |
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double arcWidth, double arcHeight) |
double arcWidth, double arcHeight) |
524 |
{ |
{ |
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this.x = (float) x; |
this.x = (float) x; |
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this.y = (float) y; |
this.y = (float) y; |