/**
* Draws a corner relative to the current point of the GeneralPath. Note the radius denotes the
* distance from the cornerPoint to where the curve starts on the line formed from the cornerPoint
* to the current point on the gp and where the curve ends on the line from the cornerPoint to the
* nextCornerPoint. In other words,
*/
private static void makeCornerTo(
GeneralPath gp, Point2D cornerPoint, Point2D nextCornerPoint, float radius) {
Point2D currentPoint = gp.getCurrentPoint();
// get fractional to the corner where the line first starts to curve
double distance = currentPoint.distance(cornerPoint);
double fraction = (distance - radius) / distance;
// calculate these distance from the current point
double xDistance = (cornerPoint.getX() - currentPoint.getX()) * fraction;
double yDistance = (cornerPoint.getY() - currentPoint.getY()) * fraction;
// draw a line to the point where the line first starts to curve
lineToRelative(gp, (float) xDistance, (float) yDistance);
Point2D startCurvePoint = gp.getCurrentPoint();
// get fractional to the corner where the line first starts to curve
double distanceFromCornerToNextCorner = cornerPoint.distance(nextCornerPoint);
double fractionToNextCorner = radius / distanceFromCornerToNextCorner;
// calculate these distance from the current point
double xDistanceFromCornerToEndCurve =
(nextCornerPoint.getX() - cornerPoint.getX()) * fractionToNextCorner;
double yDistanceFromCornerToEndCurve =
(nextCornerPoint.getY() - cornerPoint.getY()) * fractionToNextCorner;
Point2D endCurvePoint =
new Point2D.Double(
cornerPoint.getX() + xDistanceFromCornerToEndCurve,
cornerPoint.getY() + yDistanceFromCornerToEndCurve);
// finally draw the cornerShape
cornerShape(
gp,
// start at:
(float) startCurvePoint.getX(),
(float) startCurvePoint.getY(),
// corner at:
(float) cornerPoint.getX(),
(float) cornerPoint.getY(),
// end at:
(float) endCurvePoint.getX(),
(float) endCurvePoint.getY());
// System.out.println("StartCurve at: " + startCurvePoint);
// System.out.println("Corner at: " + cornerPoint);
// System.out.println("EndCurve at: " + endCurvePoint);
// System.out.println("NextCorner at: " + nextCornerPoint);
}
/**
* Draws a curve segment relative to the current point of the GeneralPath.
*
* <p>Adds a curved segment, defined by three new points, to the path by drawing a Bezier curve
* that intersects both the current coordinates and the coordinates (x3, y3), using the specified
* points (x1, y1) and (x2, y2) as Bezier control points.
*/
public static void curveTo(
GeneralPath gp, float x1, float y1, float x2, float y2, float x3, float y3) {
Point2D currentPoint = gp.getCurrentPoint();
gp.curveTo(
x1 + (float) currentPoint.getX(), y1 + (float) currentPoint.getY(),
x2 + (float) currentPoint.getX(), y2 + (float) currentPoint.getY(),
x3 + (float) currentPoint.getX(), y3 + (float) currentPoint.getY());
}
private void addToGeneralPath(Point2D q, boolean lineTo) {
Point2D p = gp.getCurrentPoint();
if (p != null && p.distance(q) < TOLERANCE) {
return;
}
if (lineTo && p != null) {
try {
gp.lineTo((float) q.getX(), (float) q.getY());
} catch (Exception e) {
gp.moveTo((float) q.getX(), (float) q.getY());
}
} else {
gp.moveTo((float) q.getX(), (float) q.getY());
}
}
/**
* if the edge is reflexive its painted as a cyclic edge if there are 2 controlpoints the
* connection is painted as a straight line from the source to the targetanchor if there are more
* as 2 controlpoints the connection path between 2 control points is painted as bezier curve
*/
@Override
protected void paintWidget() {
List<Point> contrPoints = this.getControlPoints();
int listSize = contrPoints.size();
Graphics2D gr = getGraphics();
if (listSize <= 2) {
if (isReflexive()) { // special case for reflexive connection widgets
Widget related = this.getTargetAnchor().getRelatedWidget();
int position = this.edgeBalance(related);
Rectangle bounds = related.convertLocalToScene(related.getBounds());
gr.setColor(getLineColor());
Point first = new Point();
Point last = new Point();
double centerX = bounds.getCenterX();
first.x = (int) (centerX + bounds.width / 4);
first.y = bounds.y + bounds.height;
last.x = first.x;
last.y = bounds.y;
gr.setStroke(this.getStroke());
double cutDistance = this.getTargetAnchorShape().getCutDistance();
double anchorAngle = Math.PI / -3.0;
double cutX = Math.abs(Math.cos(anchorAngle) * cutDistance);
double cutY = Math.abs(Math.sin(anchorAngle) * cutDistance);
int ydiff = first.y - last.y;
int endy = -ydiff;
double height = bounds.getHeight();
double cy = height / 4.0;
double cx = bounds.getWidth() / 5.0;
double dcx = cx * 2;
GeneralPath gp = new GeneralPath();
gp.moveTo(0, 0);
gp.quadTo(0, cy, cx, cy);
gp.quadTo(dcx, cy, dcx, -height / 2.0);
gp.quadTo(dcx, endy - cy, cy, -(cy + ydiff));
gp.quadTo(cutX * 1.5, endy - cy, cutX, endy - cutY);
AffineTransform af = new AffineTransform();
AnchorShape anchorShape = this.getTargetAnchorShape();
if (position < 0) {
first.x = (int) (centerX - bounds.width / 4);
af.translate(first.x, first.y);
af.scale(-1.0, 1.0);
last.x = first.x;
} else {
af.translate(first.x, first.y);
}
Shape s = gp.createTransformedShape(af);
gr.draw(s);
if (last != null) {
AffineTransform previousTransform = gr.getTransform();
gr.translate(last.x, last.y);
if (position < 0) gr.rotate(Math.PI - anchorAngle);
else gr.rotate(anchorAngle);
anchorShape.paint(gr, false);
gr.setTransform(previousTransform);
}
} else {
super.paintWidget();
}
return;
}
// bezier curve...
GeneralPath curvePath = new GeneralPath();
Point lastControlPoint = null;
double lastControlPointRotation = 0.0;
Point prev = null;
for (int i = 0; i < listSize - 1; i++) {
Point cur = contrPoints.get(i);
Point next = contrPoints.get(i + 1);
Point nextnext = null;
if (i < listSize - 2) {
nextnext = contrPoints.get(i + 2);
}
double len = cur.distance(next);
double scale = len * BEZIER_SCALE;
Point bezierFrom = null; // first ControlPoint
Point bezierTo = null; // second ControlPoint
if (prev == null) {
// first point
curvePath.moveTo(cur.x, cur.y); // startpoint
bezierFrom = cur;
} else {
bezierFrom = new Point(next.x - prev.x, next.y - prev.y);
bezierFrom = scaleVector(bezierFrom, scale);
bezierFrom.translate(cur.x, cur.y);
}
if (nextnext == null) { // next== last point (curve to)
lastControlPoint = next;
bezierTo = next; // set 2nd intermediate point to endpoint
GeneralPath lastseg = this.subdivide(cur, bezierFrom, bezierTo, next);
if (lastseg != null) curvePath.append(lastseg, true);
break;
} else {
bezierTo = new Point(cur.x - nextnext.x, cur.y - nextnext.y);
bezierTo = scaleVector(bezierTo, scale);
bezierTo.translate(next.x, next.y);
}
curvePath.curveTo(
bezierFrom.x, bezierFrom.y, // controlPoint1
bezierTo.x, bezierTo.y, // controlPoint2
next.x, next.y);
prev = cur;
}
Point2D cur = curvePath.getCurrentPoint();
Point next = lastControlPoint;
lastControlPointRotation = // anchor anchorAngle
Math.atan2(cur.getY() - next.y, cur.getX() - next.x);
Color previousColor = gr.getColor();
gr.setColor(getLineColor());
Stroke s = this.getStroke();
gr.setStroke(s);
gr.setColor(this.getLineColor());
gr.draw(curvePath);
AffineTransform previousTransform = gr.getTransform();
gr.translate(lastControlPoint.x, lastControlPoint.y);
gr.rotate(lastControlPointRotation);
AnchorShape targetAnchorShape = this.getTargetAnchorShape();
targetAnchorShape.paint(gr, false);
gr.setTransform(previousTransform);
// paint ControlPoints if enabled
if (isPaintControlPoints()) {
int last = listSize - 1;
for (int index = 0; index <= last; index++) {
Point point = contrPoints.get(index);
previousTransform = gr.getTransform();
gr.translate(point.x, point.y);
if (index == 0 || index == last) getEndPointShape().paint(gr);
else getControlPointShape().paint(gr);
gr.setTransform(previousTransform);
}
}
gr.setColor(previousColor);
}
/**
* Appends path gp2 to gp1. Taken from pre-redesign code.
*
* @param reversed is true if the segments are added in reverse order
*/
public static void appendPath(GeneralPath gp1, GeneralPath gp2, boolean reversed) {
ArrayList<Number[]> points =
new ArrayList<
Number[]>(); // Each element is an array consisting of one Integer and six Floats
PathIterator i = gp2.getPathIterator(new AffineTransform());
float[] segment = new float[] {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
float leftmost = Float.POSITIVE_INFINITY;
while (!i.isDone()) {
int type = i.currentSegment(segment);
i.next();
points.add(
new Number[] {
new Integer(type),
new Float(segment[0]),
new Float(segment[1]),
new Float(segment[2]),
new Float(segment[3]),
new Float(segment[4]),
new Float(segment[5])
});
}
if (reversed) {
float deltaX = (float) gp1.getCurrentPoint().getX();
float deltaY = (float) gp1.getCurrentPoint().getY();
Object[] typeAndPoints = points.get(points.size() - 1);
int type = ((Integer) typeAndPoints[0]).intValue();
if (type == PathIterator.SEG_LINETO) {
deltaX -= ((Float) typeAndPoints[1]).floatValue();
deltaY -= ((Float) typeAndPoints[2]).floatValue();
} else if (type == PathIterator.SEG_QUADTO) {
deltaX -= ((Float) typeAndPoints[3]).floatValue();
deltaY -= ((Float) typeAndPoints[4]).floatValue();
} else if (type == PathIterator.SEG_CUBICTO) {
deltaX -= ((Float) typeAndPoints[5]).floatValue();
deltaY -= ((Float) typeAndPoints[6]).floatValue();
} else {
assert false : type;
}
for (int j = points.size() - 1; j >= 1; j--) {
typeAndPoints = points.get(j);
type = ((Integer) typeAndPoints[0]).intValue();
float x1 = ((Float) typeAndPoints[1]).floatValue();
float y1 = ((Float) typeAndPoints[2]).floatValue();
float x2 = ((Float) typeAndPoints[3]).floatValue();
float y2 = ((Float) typeAndPoints[4]).floatValue();
float prevX = 0.0f, prevY = 0.0f;
int prevType = ((Integer) points.get(j - 1)[0]).intValue();
if ((prevType == PathIterator.SEG_MOVETO) || (prevType == PathIterator.SEG_LINETO)) {
prevX = ((Float) points.get(j - 1)[1]).floatValue();
prevY = ((Float) points.get(j - 1)[2]).floatValue();
} else if (prevType == PathIterator.SEG_QUADTO) {
prevX = ((Float) points.get(j - 1)[3]).floatValue();
prevY = ((Float) points.get(j - 1)[4]).floatValue();
} else if (prevType == PathIterator.SEG_CUBICTO) {
prevX = ((Float) points.get(j - 1)[5]).floatValue();
prevY = ((Float) points.get(j - 1)[6]).floatValue();
} else {
assert false : prevType;
}
leftmost = Math.min(leftmost, prevX + deltaX);
if ((type == PathIterator.SEG_MOVETO) || (type == PathIterator.SEG_LINETO)) {
gp1.lineTo(prevX + deltaX, prevY + deltaY);
} else if (type == PathIterator.SEG_QUADTO) {
gp1.quadTo(x1 + deltaX, y1 + deltaY, prevX + deltaX, prevY + deltaY);
} else if (type == PathIterator.SEG_CUBICTO) {
gp1.curveTo(
x2 + deltaX, y2 + deltaY, x1 + deltaX, y1 + deltaY, prevX + deltaX, prevY + deltaY);
} else {
assert false : type;
}
}
} else // Not reversed
{
float deltaX = (float) gp1.getCurrentPoint().getX() - ((Float) points.get(0)[1]).floatValue();
float deltaY = (float) gp1.getCurrentPoint().getY() - ((Float) points.get(0)[2]).floatValue();
for (int j = 1; j < points.size(); j++) {
Object[] typeAndPoints = points.get(j);
int type = ((Integer) typeAndPoints[0]).intValue();
float x1 = ((Float) typeAndPoints[1]).floatValue();
float y1 = ((Float) typeAndPoints[2]).floatValue();
float x2 = ((Float) typeAndPoints[3]).floatValue();
float y2 = ((Float) typeAndPoints[4]).floatValue();
float x3 = ((Float) typeAndPoints[5]).floatValue();
float y3 = ((Float) typeAndPoints[6]).floatValue();
if (type == PathIterator.SEG_MOVETO) {
} else if (type == PathIterator.SEG_LINETO) {
gp1.lineTo(x1 + deltaX, y1 + deltaY);
leftmost = Math.min(leftmost, x1 + deltaX);
} else if (type == PathIterator.SEG_QUADTO) {
gp1.quadTo(x1 + deltaX, y1 + deltaY, x2 + deltaX, y2 + deltaY);
leftmost = Math.min(leftmost, x2 + deltaX);
} else if (type == PathIterator.SEG_CUBICTO) {
gp1.curveTo(x1 + deltaX, y1 + deltaY, x2 + deltaX, y2 + deltaY, x3 + deltaX, y3 + deltaY);
leftmost = Math.min(leftmost, x3 + deltaX);
} else {
assert false : type;
}
}
}
}
/** Draws a line segment relative to the current point of the GeneralPath. */
public static void lineToRelative(GeneralPath gp, float x, float y) {
Point2D currentPoint = gp.getCurrentPoint();
gp.lineTo((float) currentPoint.getX() + x, (float) currentPoint.getY() + y);
}