public Point locate() {
LineConnection line = ownerConnection();
int segment = Math.min(fSegment, line.pointCount() - 2);
Point p1 = line.pointAt(segment);
Point p2 = line.pointAt(segment + 1);
return new Point((p1.x + p2.x) / 2, (p1.y + p2.y) / 2);
}
public void invokeStep(int x, int y, int anchorX, int anchorY, DrawingView view) {
LineConnection line = ownerConnection();
Point p1 = line.pointAt(fSegment);
Point p2 = line.pointAt(fSegment + 1);
int ddx = x - fLastX;
int ddy = y - fLastY;
Point np1;
Point np2;
if (isVertical(p1, p2)) {
int cx = constrainX(p1.x + ddx);
np1 = new Point(cx, p1.y);
np2 = new Point(cx, p2.y);
} else {
int cy = constrainY(p1.y + ddy);
np1 = new Point(p1.x, cy);
np2 = new Point(p2.x, cy);
}
line.setPointAt(np1, fSegment);
line.setPointAt(np2, fSegment + 1);
fLastX = x;
fLastY = y;
}
private int constrainY(int y) {
LineConnection line = ownerConnection();
Figure startFigure = line.getStartConnector().owner();
Figure endFigure = line.getEndConnector().owner();
Rectangle start = startFigure.displayBox();
Rectangle end = endFigure.displayBox();
Insets i1 = startFigure.connectionInsets();
Insets i2 = endFigure.connectionInsets();
int r1y, r1height, r2y, r2height;
r1y = start.y + i1.top;
r1height = start.height - i1.top - i1.bottom - 1;
r2y = end.y + i2.top;
r2height = end.height - i2.top - i2.bottom - 1;
if (fSegment == 0) {
y = Geom.range(r1y, r1y + r1height, y);
}
if (fSegment == line.pointCount() - 2) {
y = Geom.range(r2y, r2y + r2height, y);
}
return y;
}
private int constrainX(int x) {
LineConnection line = ownerConnection();
Figure startFigure = line.getStartConnector().owner();
Figure endFigure = line.getEndConnector().owner();
Rectangle start = startFigure.displayBox();
Rectangle end = endFigure.displayBox();
Insets i1 = startFigure.connectionInsets();
Insets i2 = endFigure.connectionInsets();
int r1x, r1width, r2x, r2width;
r1x = start.x + i1.left;
r1width = start.width - i1.left - i1.right - 1;
r2x = end.x + i2.left;
r2width = end.width - i2.left - i2.right - 1;
if (fSegment == 0) {
x = Geom.range(r1x, r1x + r1width, x);
}
if (fSegment == line.pointCount() - 2) {
x = Geom.range(r2x, r2x + r2width, x);
}
return x;
}