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- /*
- * Copyright 2000-2014 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.client.ui.dd;
-
- import com.google.gwt.dom.client.Element;
- import com.google.gwt.dom.client.NativeEvent;
- import com.google.gwt.user.client.Window;
- import com.vaadin.client.Util;
- import com.vaadin.shared.ui.dd.HorizontalDropLocation;
- import com.vaadin.shared.ui.dd.VerticalDropLocation;
-
- public class DDUtil {
-
- public static VerticalDropLocation getVerticalDropLocation(Element element,
- NativeEvent event, double topBottomRatio) {
- int offsetHeight = element.getOffsetHeight();
- return getVerticalDropLocation(element, offsetHeight, event,
- topBottomRatio);
- }
-
- public static VerticalDropLocation getVerticalDropLocation(Element element,
- int offsetHeight, NativeEvent event, double topBottomRatio) {
- int clientY = Util.getTouchOrMouseClientY(event);
- return getVerticalDropLocation(element, offsetHeight, clientY,
- topBottomRatio);
- }
-
- public static VerticalDropLocation getVerticalDropLocation(Element element,
- int offsetHeight, int clientY, double topBottomRatio) {
-
- // Event coordinates are relative to the viewport, element absolute
- // position is relative to the document. Make element position relative
- // to viewport by adjusting for viewport scrolling. See #6021
- int elementTop = element.getAbsoluteTop() - Window.getScrollTop();
- int fromTop = clientY - elementTop;
-
- float percentageFromTop = (fromTop / (float) offsetHeight);
- if (percentageFromTop < topBottomRatio) {
- return VerticalDropLocation.TOP;
- } else if (percentageFromTop > 1 - topBottomRatio) {
- return VerticalDropLocation.BOTTOM;
- } else {
- return VerticalDropLocation.MIDDLE;
- }
- }
-
- public static HorizontalDropLocation getHorizontalDropLocation(
- Element element, NativeEvent event, double leftRightRatio) {
- int clientX = Util.getTouchOrMouseClientX(event);
-
- // Event coordinates are relative to the viewport, element absolute
- // position is relative to the document. Make element position relative
- // to viewport by adjusting for viewport scrolling. See #6021
- int elementLeft = element.getAbsoluteLeft() - Window.getScrollLeft();
- int offsetWidth = element.getOffsetWidth();
- int fromLeft = clientX - elementLeft;
-
- float percentageFromLeft = (fromLeft / (float) offsetWidth);
- if (percentageFromLeft < leftRightRatio) {
- return HorizontalDropLocation.LEFT;
- } else if (percentageFromLeft > 1 - leftRightRatio) {
- return HorizontalDropLocation.RIGHT;
- } else {
- return HorizontalDropLocation.CENTER;
- }
- }
-
- }
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