@Override
public void mouseDragged(MouseEvent e, CS355Drawing model, Color c) {
// Get shape at saved index from model and verify it is a circle
Shape shape = model.getShape(this.index);
if (!(shape instanceof cs355.model.drawing.Circle)) {
GUIFunctions.printf(
"Invalid shape - expected cs355.model.drawing.Circle at index %d", this.index);
return;
}
// Cast the shape to a circle and save the new coordinates
Circle circle = (Circle) shape;
// Initialize new center coordinates to initial coordinates
Point2D.Double center = new Point2D.Double();
center.setLocation(this.initialCoordinates);
// Get current pointer coordinates
Point2D.Double currentCoordinates = new Point2D.Double();
currentCoordinates.setLocation(e.getPoint());
// Find difference between pointer and initial coordinates to get correct orientation
double xDifference = currentCoordinates.getX() - initialCoordinates.getX();
double yDifference = currentCoordinates.getY() - initialCoordinates.getY();
// Get radius
double radius = Math.min(Math.abs(xDifference), Math.abs(yDifference)) / 2.0;
// Get unit vectors for the differences to preserve sign
double xDirection = xDifference / Math.abs(xDifference);
double yDirection = yDifference / Math.abs(yDifference);
// Calculate position of the center of the circle
center.x = this.initialCoordinates.getX() + (xDirection * radius);
center.y = this.initialCoordinates.getY() + (yDirection * radius);
// Set the new parameters
circle.setCenter(center);
circle.setRadius(radius);
}
