/**
* Tests if a point p is over a selection point.
*
* @param p point
* @return nearest selection point
*/
public WhiteboardPoint getSelectionPoint(Point2D p) {
WhiteboardPoint givenPoint = new WhiteboardPoint(p.getX(), p.getY());
if (startPoint.distance(givenPoint) < 10) return startPoint;
else if (endPoint.distance(givenPoint) < 10) return endPoint;
return null;
}
/**
* Tests if the shape contains a point.
*
* @param p coord point
* @return true if shape contains p
*/
public boolean contains(Point2D p) {
double x = startPoint.getX();
double y = startPoint.getY();
double xEnd = endPoint.getX();
double yEnd = endPoint.getY();
Line2D line = new Line2D.Double(x, y, xEnd, yEnd);
return line.intersects(p.getX(), p.getY(), 10, 10);
}
/**
* Translates the shape.
*
* @param deltaX x coordinate
* @param deltaY y coordinate
*/
public void translate(double deltaX, double deltaY) {
double x = startPoint.getX();
double y = startPoint.getY();
double xEnd = endPoint.getX();
double yEnd = endPoint.getY();
x += deltaX;
xEnd += deltaX;
y += deltaY;
yEnd += deltaY;
startPoint = new WhiteboardPoint(x, y);
endPoint = new WhiteboardPoint(xEnd, yEnd);
}
/**
* Code to paint the specific shape
*
* @param w2v 2D affine transform
* @param g graphics context
*/
public void paintShape(Graphics2D g, AffineTransform w2v) {
double x = startPoint.getX();
double y = startPoint.getY();
double xEnd = endPoint.getX();
double yEnd = endPoint.getY();
g.setStroke(new BasicStroke(this.getThickness(), BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND));
Point2D v0 = w2v.transform(new Point2D.Double(x, y), null);
int ix = (int) v0.getX();
int iy = (int) v0.getY();
Point2D v1 = w2v.transform(new Point2D.Double(xEnd, yEnd), null);
g.drawLine(ix, iy, (int) v1.getX(), (int) v1.getY());
}
/**
* WhiteboardShapeLine constructor
*
* @param id String that uniquely identifies this WhiteboardObject.
* @param t number of pixels that this object (or its border)
* @param c WhiteboardShapeLine's color (or rather it's border)
* @param startPoint the start coordinates of this line.
* @param endPoint the end coordinates of this line.
* @param v2w 2D affine transform
*/
public WhiteboardShapeLine(
String id,
int t,
Color c,
WhiteboardPoint startPoint,
WhiteboardPoint endPoint,
AffineTransform v2w) {
super(id);
this.setThickness(t);
setColor(c);
Point2D v0 = new Point2D.Double(startPoint.getX(), startPoint.getY());
Point2D w0 = v2w.transform(v0, null);
this.startPoint = new WhiteboardPoint(w0.getX(), w0.getY());
Point2D v1 = new Point2D.Double(endPoint.getX(), endPoint.getY());
Point2D w1 = v2w.transform(v1, null);
this.endPoint = new WhiteboardPoint(w1.getX(), w1.getY());
}
/**
* Translates a point from the shape.
*
* @param deltaX x coordinate
* @param deltaY y coordinate
*/
public void translateSelectedPoint(double deltaX, double deltaY) {
if (getModifyPoint() == null) return;
if (getModifyPoint().equals(startPoint)) {
startPoint.setX(startPoint.getX() + deltaX);
startPoint.setY(startPoint.getY() + deltaY);
this.setModifyPoint(startPoint);
} else if (getModifyPoint().equals(endPoint)) {
endPoint.setX(endPoint.getX() + deltaX);
endPoint.setY(endPoint.getY() + deltaY);
this.setModifyPoint(endPoint);
}
}