CircleView.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.kie.workbench.common.stunner.shapes.client.view;

import com.ait.lienzo.client.core.shape.MultiPath;
import org.kie.workbench.common.stunner.client.lienzo.shape.view.WiresContainerShapeView;
import org.kie.workbench.common.stunner.core.client.shape.view.HasRadius;
import org.kie.workbench.common.stunner.core.client.shape.view.event.ShapeViewSupportedEvents;

/**
 * The lienzo view implementation for the Circle shape.
 * TODO: Disabling for now the resize for circles - ARC resize is not implemented yet on lienzo side.
 */
public class CircleView extends WiresContainerShapeView<CircleView>
        implements HasRadius<CircleView> {

    public CircleView(final double radius) {
        super(ShapeViewSupportedEvents.DESKTOP_NO_RESIZE_EVENT_TYPES,
              create(new MultiPath(),
                     radius));
    }

    @Override
    public CircleView setRadius(final double radius) {
        create(getPath().clear(),
               radius);
        updateFillGradient(radius * 2,
                           radius * 2);
        refresh();
        super.setResizable(false);
        return this;
    }

    private static MultiPath create(final MultiPath path,
                                    final double radius) {
        return path.M(radius,
                      0).circle(radius).Z();
    }
}