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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  /*
19   * @author Paul Smith <psmith@apache.org>
20   *
21   */
22  package org.apache.log4j.chainsaw;
23  
24  import org.apache.log4j.chainsaw.icons.ChainsawIcons;
25  
26  import javax.swing.*;
27  import java.awt.*;
28  import java.util.HashSet;
29  import java.util.Set;
30  
31  
32  /**
33   * A simple splash screen to be used at startup, while everything get's initialized.
34   *
35   * @author Paul Smith <psmith@apache.org>
36   */
37  class ChainsawSplash extends JWindow {
38      ChainsawSplash(Frame owner) {
39          super(owner);
40  
41          Container container = getContentPane();
42          JPanel panel = new JPanel(new BorderLayout());
43          JLabel logo = new JLabel(ChainsawIcons.ICON_LOG4J);
44  
45          JLabel text = new JLabel("Chainsaw v2", SwingConstants.CENTER);
46          Font textFont = null;
47          String[] preferredFontNames =
48              new String[]{"Arial", "Helvetica", "SansSerif"};
49  
50          Set<String> availableFontNames = new HashSet<>();
51          Font[] allFonts =
52              GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
53  
54          for (Font allFont : allFonts) {
55              availableFontNames.add(allFont.getName());
56          }
57  
58          for (String preferredFontName : preferredFontNames) {
59              if (availableFontNames.contains(preferredFontName)) {
60                  textFont = new Font(preferredFontName, Font.PLAIN, 12);
61  
62                  System.out.println("Using font=" + textFont.getName());
63  
64                  break;
65              }
66          }
67  
68          if (textFont == null) {
69              System.out.println("Using basic font");
70              textFont = text.getFont();
71          }
72  
73          text.setFont(textFont.deriveFont(16f).deriveFont(Font.BOLD));
74          text.setBackground(Color.white);
75          text.setForeground(Color.black);
76          text.setBorder(BorderFactory.createLoweredBevelBorder());
77          panel.add(logo, BorderLayout.CENTER);
78          panel.add(text, BorderLayout.SOUTH);
79          panel.setBorder(BorderFactory.createLineBorder(Color.black, 1));
80  
81          container.add(panel);
82          pack();
83      }
84  }