DefaultMagnet.java

/*
 * Copyright 2015 JBoss, by Red Hat, Inc
 *
 * 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.
 */

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package org.uberfire.ext.wires.core.client.magnets;

import java.util.ArrayList;
import java.util.List;

import com.ait.lienzo.client.core.shape.Circle;
import com.ait.lienzo.client.core.types.Point2D;
import org.uberfire.commons.uuid.UUID;
import org.uberfire.ext.wires.core.api.controlpoints.ControlPoint;
import org.uberfire.ext.wires.core.api.magnets.Magnet;
import org.uberfire.ext.wires.core.client.util.ShapesUtils;

public class DefaultMagnet extends Circle implements Magnet<Circle> {

    private static final int RADIUS = 8;

    private final String id;
    private final List<ControlPoint> attachedControlPoints = new ArrayList<ControlPoint>();

    public DefaultMagnet(final double x,
                         final double y) {
        super(RADIUS);
        this.id = UUID.uuid();

        setFillColor(ShapesUtils.MAGNET_RGB_FILL_SHAPE);
        setStrokeWidth(ShapesUtils.CP_RGB_STROKE_WIDTH_SHAPE);
        setX(x);
        setY(y);
        setDraggable(false);
    }

    @Override
    public String getId() {
        return id;
    }

    @Override
    public void attachControlPoint(final ControlPoint controlPoint) {
        attachedControlPoints.add(controlPoint);
    }

    @Override
    public void detachControlPoint(final ControlPoint controlPoint) {
        attachedControlPoints.remove(controlPoint);
    }

    @Override
    public List<ControlPoint> getAttachedControlPoints() {
        return attachedControlPoints;
    }

    @Override
    public void setActive(final boolean isActive) {
        if (isActive) {
            setFillColor(ShapesUtils.MAGNET_ACTIVE_RGB_FILL_SHAPE);
        } else {
            setFillColor(ShapesUtils.MAGNET_RGB_FILL_SHAPE);
        }
    }

    @Override
    public Circle setX(final double x) {
        final Circle c = super.setX(x);
        moveAttachedControlPoints();
        return c;
    }

    @Override
    public Circle setY(final double y) {
        final Circle c = super.setY(y);
        moveAttachedControlPoints();
        return c;
    }

    @Override
    public Circle setLocation(final Point2D p) {
        final Circle c = super.setLocation(p);
        moveAttachedControlPoints();
        return c;
    }

    @Override
    public void move(final double dx,
                     final double dy) {
        setLocation(getLocation().add(new Point2D(dx,
                                                  dy)));
    }

    protected void moveAttachedControlPoints() {
        final List<ControlPoint> controlPoints = getAttachedControlPoints();
        if (controlPoints == null || controlPoints.isEmpty()) {
            return;
        }
        for (ControlPoint cp : controlPoints) {
            final double dx = getX();
            final double dy = getY();
            cp.setX(dx);
            cp.setY(dy);
            cp.getHandler().onMove(dx,
                                   dy);
        }
    }

    @Override
    public String toString() {
        return "DefaultMagnet{" + "id=" + id + '}';
    }
}