GlyphDragProxyImpl.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.client.lienzo.components.drag;

import javax.enterprise.context.Dependent;
import javax.inject.Inject;

import org.kie.workbench.common.stunner.client.lienzo.LienzoLayer;
import org.kie.workbench.common.stunner.core.client.canvas.AbstractCanvas;
import org.kie.workbench.common.stunner.core.client.components.drag.DragProxy;
import org.kie.workbench.common.stunner.core.client.components.drag.DragProxyCallback;
import org.kie.workbench.common.stunner.core.client.components.drag.GlyphDragProxy;
import org.kie.workbench.common.stunner.core.client.components.drag.PrimitiveDragProxy;
import org.kie.workbench.common.stunner.core.client.shape.view.glyph.Glyph;

@Dependent
public class GlyphDragProxyImpl implements GlyphDragProxy<AbstractCanvas> {

    PrimitiveDragProxy primitiveDragProxyFactory;

    @Inject
    public GlyphDragProxyImpl(final PrimitiveDragProxy primitiveDragProxyFactory) {
        this.primitiveDragProxyFactory = primitiveDragProxyFactory;
    }

    @Override
    @SuppressWarnings("unchecked")
    public DragProxy<AbstractCanvas, Glyph, DragProxyCallback> proxyFor(final AbstractCanvas context) {
        final LienzoLayer layer = (LienzoLayer) context.getLayer();
        this.primitiveDragProxyFactory.proxyFor(layer.getLienzoLayer());
        return this;
    }

    @Override
    @SuppressWarnings("unchecked")
    public DragProxy<AbstractCanvas, Glyph, DragProxyCallback> show(final Glyph item,
                                                                    final int x,
                                                                    final int y,
                                                                    final DragProxyCallback callback) {
        primitiveDragProxyFactory.show(item.getGroup(),
                                       x,
                                       y,
                                       callback);
        return this;
    }

    @Override
    public void clear() {
        if (null != this.primitiveDragProxyFactory) {
            this.primitiveDragProxyFactory.clear();
        }
    }

    @Override
    public void destroy() {
        if (null != this.primitiveDragProxyFactory) {
            this.primitiveDragProxyFactory.destroy();
        }
        this.primitiveDragProxyFactory = null;
    }
}