packages/stunner-editors/lienzo-webapp/src/main/java/org/kie/lienzo/client/BasicWiresExample.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.lienzo.client;

import com.ait.lienzo.client.core.shape.MultiPath;
import com.ait.lienzo.client.core.shape.wires.IConnectionAcceptor;
import com.ait.lienzo.client.core.shape.wires.IContainmentAcceptor;
import com.ait.lienzo.client.core.shape.wires.IControlPointsAcceptor;
import com.ait.lienzo.client.core.shape.wires.IDockingAcceptor;
import com.ait.lienzo.client.core.shape.wires.ILocationAcceptor;
import com.ait.lienzo.client.core.shape.wires.WiresContainer;
import com.ait.lienzo.client.core.shape.wires.WiresManager;
import com.ait.lienzo.client.core.shape.wires.WiresShape;
import com.ait.lienzo.client.core.types.Point2D;

import static org.kie.lienzo.client.util.WiresUtils.connect;

public class BasicWiresExample extends BaseExample implements Example {

    public static final String RED_RECTANGLE = "redRectangle";
    public static final String BLUE_RECTANGLE = "blueRectangle";
    public static final String CIRCLE = "circle";
    public static final String PARENT = "parent";

    private WiresManager wiresManager;
    private WiresShape shapeRedRectangle;
    private WiresShape shapeCircle;
    private WiresShape shapeBlueRectangle;
    private WiresShape shapeParent;

    public BasicWiresExample(final String title) {
        super(title);
    }

    private WiresShape createShape(String id, MultiPath path, Point2D location) {
        WiresShape shape = new WiresShape(path)
                .setID(id)
                .setDraggable(true)
                .setLocation(location);
        shape.getGroup().setUserData(id);
        wiresManager.register(shape);
        wiresManager.getMagnetManager().createMagnets(shape);
        return shape;
    }

    @Override
    public void run() {
        wiresManager = WiresManager.get(layer);
        wiresManager.enableSelectionManager();
        wiresManager.setContainmentAcceptor(CONTAINMENT_ACCEPTOR);
        wiresManager.setDockingAcceptor(DOCKING_ACCEPTOR);
        wiresManager.setConnectionAcceptor(IConnectionAcceptor.ALL);
        wiresManager.setLocationAcceptor(ILocationAcceptor.ALL);
        wiresManager.setControlPointsAcceptor(IControlPointsAcceptor.ALL);

        shapeRedRectangle = createShape(RED_RECTANGLE,
                                        new MultiPath().rect(0, 0, 100, 100)
                                                .setStrokeColor("#FF0000")
                                                .setFillColor("#FF0000"),
                                        new Point2D(100, 50));

        shapeCircle = createShape(CIRCLE,
                                  new MultiPath().circle(50)
                                          .setStrokeColor("#FF0000")
                                          .setFillColor("#FF0000"),
                                  new Point2D(400, 50));

        shapeBlueRectangle = createShape(BLUE_RECTANGLE,
                                         new MultiPath().rect(0, 0, 100, 100)
                                                 .setStrokeColor("#0000FF")
                                                 .setFillColor("#0000FF"),
                                         new Point2D(650, 50));

        shapeParent = createShape(PARENT,
                                  new MultiPath().rect(0, 0, 600, 250)
                                          .setStrokeColor("#000000")
                                          .setFillColor("#FFFFFF"),
                                  new Point2D(50, 300));

        connect(shapeRedRectangle.getMagnets(),
                3,
                shapeCircle.getMagnets(),
                7,
                wiresManager,
                false);
    }

    private static final IContainmentAcceptor CONTAINMENT_ACCEPTOR = new IContainmentAcceptor() {
        @Override
        public boolean containmentAllowed(WiresContainer parent, WiresShape[] children) {
            return test(parent, children);
        }

        @Override
        public boolean acceptContainment(WiresContainer parent, WiresShape[] children) {
            return test(parent, children);
        }
    };

    private static final IDockingAcceptor DOCKING_ACCEPTOR = new IDockingAcceptor() {
        @Override
        public boolean dockingAllowed(WiresContainer parent, WiresShape child) {
            return test(parent, child);
        }

        @Override
        public boolean acceptDocking(WiresContainer parent, WiresShape child) {
            return test(parent, child);
        }

        @Override
        public int getHotspotSize() {
            return 25;
        }
    };

    private static boolean test(WiresContainer parent, WiresShape... children) {
        if (null == parent || null == parent.getGroup()) {
            return true;
        }
        if (PARENT.equals(parent.getGroup().getUserData())) {
            for (WiresShape child : children) {
                Object data = child.getGroup().getUserData();
                if (BLUE_RECTANGLE.equals(data)) {
                    return false;
                }
            }
        }
        return true;
    }
}