gwt.g2d.client.graphics.visitor.LineSegmentVisitor.java Source code

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Here is the source code for gwt.g2d.client.graphics.visitor.LineSegmentVisitor.java

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/*
 * 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 com.google.gwt.canvas.dom.client.Context2d;

import gwt.g2d.client.graphics.Surface;
import gwt.g2d.shared.math.Vector2;

/**
 * Adds a line to the current subpath.
 * The new position will be set to the end point of the line.
 * 
 * @author hao1300@gmail.com
 */
public class LineSegmentVisitor implements ShapeVisitor {
    private final double fromX, fromY, toX, toY;

    /**
     * Adds a straight line from fromPosition to toPosition.
     */
    public LineSegmentVisitor(Vector2 fromPosition, Vector2 toPosition) {
        this(fromPosition.getX(), fromPosition.getY(), toPosition.getX(), toPosition.getY());
    }

    /**
     * Adds a straight line from (fromX, fromY) to (toX, toY).
     */
    public LineSegmentVisitor(double fromX, double fromY, double toX, double toY) {
        this.fromX = fromX;
        this.fromY = fromY;
        this.toX = toX;
        this.toY = toY;
    }

    @Override
    public void visit(Surface surface) {
        Context2d context = surface.getContext();
        context.moveTo(fromX, fromY);
        context.lineTo(toX, toY);
    }
}