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- /*
- * Copyright 2000-2016 Vaadin Ltd.
- *
- * 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 com.vaadin.event.dnd.grid;
-
- import java.lang.reflect.Method;
-
- import com.vaadin.event.ConnectorEventListener;
- import com.vaadin.ui.GridDragSource;
-
- /**
- * Drag start listener for HTML5 drag start on a Grid row.
- *
- * @param <T>
- * The Grid bean type.
- * @author Vaadin Ltd.
- * @see GridDragSource#addGridDragStartListener(GridDragStartListener)
- * @since
- */
- @FunctionalInterface
- public interface GridDragStartListener<T> extends ConnectorEventListener {
-
- static final Method DRAG_START_METHOD = GridDragStartListener.class
- .getDeclaredMethods()[0];
-
- /**
- * Invoked when the user has started dragging grid's rows.
- *
- * @param event
- * The drag start event.
- */
- void dragStart(GridDragStartEvent<T> event);
- }
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