Java tutorial
/* * Copyright (C) 2011 University of Washington * * 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.opendatakit.aggregate.client.popups; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.PopupPanel; public class AbstractPopupBase extends PopupPanel { public AbstractPopupBase() { super(false); setModal(true); // things not in the popup are inactive // Set glass behind the popup so that the things behind it are grayed out. this.setGlassEnabled(true); this.setGlassStyleName("gwt-PopupPanelGlassAggregate"); } public PopupPanel.PositionCallback getPositionCallBack() { return new PopupPanel.PositionCallback() { @Override public void setPosition(int offsetWidth, int offsetHeight) { int left = Window.getScrollLeft() + ((Window.getClientWidth() - offsetWidth) / 2); int top = Window.getScrollTop() + ((Window.getClientHeight() - offsetHeight) / 2); setPopupPosition(left, top); } }; } }