Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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.apache.marmotta.splash.common.ui; import java.awt.Font; import java.awt.Frame; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Arrays; import java.util.List; import java.util.concurrent.atomic.AtomicInteger; import javax.swing.AbstractButton; import javax.swing.BorderFactory; import javax.swing.Icon; import javax.swing.JButton; import javax.swing.JDialog; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.WindowConstants; import org.apache.commons.lang3.StringEscapeUtils; import org.apache.commons.lang3.StringUtils; public class SelectionDialog { public static int select(String title, String message, String description, List<Option> options, int defaultOption) { final JDialog dialog = new JDialog((Frame) null, title); dialog.setModal(true); dialog.setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE); final AtomicInteger result = new AtomicInteger(Math.max(defaultOption, -1)); JButton defaultBtn = null; final JPanel root = new JPanel(new GridBagLayout()); root.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10)); dialog.getRootPane().setContentPane(root); JLabel lblMsg = new JLabel("<html>" + StringEscapeUtils.escapeHtml3(message).replaceAll("\\n", "<br>")); lblMsg.setFont(lblMsg.getFont().deriveFont(Font.BOLD, 16f)); GridBagConstraints cLabel = new GridBagConstraints(); cLabel.gridx = 0; cLabel.gridy = 0; cLabel.fill = GridBagConstraints.BOTH; cLabel.weightx = 1; cLabel.weighty = 0.5; cLabel.insets = new Insets(5, 5, 5, 5); root.add(lblMsg, cLabel); JLabel lblDescr = new JLabel( "<html>" + StringEscapeUtils.escapeHtml3(description).replaceAll("\\n", "<br>")); cLabel.gridy++; cLabel.insets = new Insets(0, 5, 5, 5); root.add(lblDescr, cLabel); // All the options cLabel.ipadx = 10; cLabel.ipady = 10; cLabel.insets = new Insets(5, 15, 0, 15); for (int i = 0; i < options.size(); i++) { cLabel.gridy++; final Option o = options.get(i); final JButton btn = new JButton( "<html>" + StringEscapeUtils.escapeHtml3(o.label).replaceAll("\\n", "<br>"), MessageDialog.loadIcon(o.icon)); if (StringUtils.isNotBlank(o.info)) { btn.setToolTipText("<html>" + StringEscapeUtils.escapeHtml3(o.info).replaceAll("\\n", "<br>")); } btn.setHorizontalAlignment(AbstractButton.LEADING); btn.setVerticalTextPosition(AbstractButton.CENTER); btn.setHorizontalTextPosition(AbstractButton.TRAILING); final int myAnswer = i; btn.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { result.set(myAnswer); dialog.setVisible(false); } }); root.add(btn, cLabel); if (i == defaultOption) { dialog.getRootPane().setDefaultButton(btn); defaultBtn = btn; } } final Icon icon = MessageDialog.loadIcon(); if (icon != null) { JLabel lblIcn = new JLabel(icon); GridBagConstraints cIcon = new GridBagConstraints(); cIcon.gridx = 1; cIcon.gridy = 0; cIcon.gridheight = 2 + options.size(); cIcon.fill = GridBagConstraints.NONE; cIcon.weightx = 0; cIcon.weighty = 1; cIcon.anchor = GridBagConstraints.NORTH; cIcon.insets = new Insets(10, 5, 5, 0); root.add(lblIcn, cIcon); } final JButton close = new JButton("Cancel"); close.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { result.set(-1); dialog.setVisible(false); } }); GridBagConstraints cClose = new GridBagConstraints(); cClose.gridx = 0; cClose.gridy = 2 + options.size(); cClose.gridwidth = 2; cClose.weightx = 1; cClose.weighty = 0; cClose.insets = new Insets(15, 5, 5, 5); root.add(close, cClose); if (defaultOption < 0) { dialog.getRootPane().setDefaultButton(close); defaultBtn = close; } dialog.pack(); dialog.setLocationRelativeTo(null); defaultBtn.requestFocusInWindow(); dialog.setVisible(true); dialog.dispose(); return result.get(); } public static class Option { private String label, info; private String icon; public Option(String label) { this(label, "", null); } public Option(String label, String info) { this(label, info, null); } public Option(String label, String info, String icon) { this.label = label; this.info = info; this.icon = icon; } public String getLabel() { return label; } public void setLabel(String label) { this.label = label; } public String getInfo() { return info; } public void setInfo(String info) { this.info = info; } public String getIcon() { return icon; } public void setIcon(String icon) { this.icon = icon; } } public static void main(String[] args) { final List<Option> options = Arrays.asList(new Option("Option1\nfoo"), new Option("Option2", "this is \nalso valid"), new Option("Option3", "", MessageDialog.MARMOTTA_ICON)); final int choice = select("Question", "Please select", "what do you prefer?", options, 1); if (choice < 0) { System.out.println("No coice was made!"); } else { System.out.printf("Your choice was %d%n%s (%s)", choice, options.get(choice).label, options.get(choice).info); } } }