/*
* Copyright 2009 Hao Nguyen
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package gwt.g2d.client.graphics.visitor;
import gwt.g2d.client.graphics.Surface;
import gwt.g2d.client.graphics.canvas.Context;
import gwt.g2d.client.math.Circle;
import gwt.g2d.client.math.MathHelper;
import gwt.g2d.client.math.Vector2;
/**
* Draws a circle to the current subpath.
* The new position will be set to the location on the arc at 0 degree.
*
* @author hao1300@gmail.com
*/
public class CircleVisitor implements ShapeVisitor {
private double x, y, radius;
public CircleVisitor(double x, double y, double radius) {
this.x = x;
this.y = y;
this.radius = radius;
}
public CircleVisitor(Vector2 center, double radius) {
this(center.getX(), center.getY(), radius);
}
public CircleVisitor(Circle circle) {
this(circle.getCenterX(), circle.getCenterY(), circle.getRadius());
}
@Override
public void visit(Surface surface) {
Context context = surface.getContext();
context.moveTo(x, y);
context.arc(x, y, radius, 0, MathHelper.TWO_PI, true);
}
}