Transform.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.core.client.canvas;

/**
 * The current transforms that are supported for canvas layers.
 * See <a>org.kie.workbench.common.stunner.core.client.canvas.controls.pan.PanControl</a>
 * See <a>org.kie.workbench.common.stunner.core.client.canvas.controls.zoom.ZoomControl</a>
 */
public interface Transform {

    /**
     * Returns the cartesian coordinates for the current translation, if any.
     */
    Point2D getTranslate();

    /**
     * Returns the values for the current scale on each cartesian axis, if any.
     */
    Point2D getScale();

    /**
     * Returns the cartesian coordinates resulting after applying this
     * instance' transforms.
     */
    Point2D transform(final double x,
                      final double y);
}