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1   /*
2    *  Licensed under the Apache License, Version 2.0 (the "License");
3    *  you may not use this file except in compliance with the License.
4    *  You may obtain a copy of the License at
5    *
6    *      http://www.apache.org/licenses/LICENSE-2.0
7    *
8    *  Unless required by applicable law or agreed to in writing, software
9    *  distributed under the License is distributed on an "AS IS" BASIS,
10   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11   *  See the License for the specific language governing permissions and
12   *  limitations under the License.
13   */
14  /*
15   * This file has been modified by Chris Pheby in accordance with Section 4.2
16   * of the Apache Software License
17   */
18  package org.jadira.dependencynavigator.gui;
19  
20  import java.awt.Color;
21  import java.awt.Component;
22  import java.awt.Dimension;
23  import java.awt.Font;
24  import java.awt.FontMetrics;
25  
26  import javax.swing.BorderFactory;
27  import javax.swing.JTree;
28  import javax.swing.tree.DefaultTreeCellRenderer;
29  
30  import org.jadira.dependencynavigator.model.Artifact;
31  
32  public class DependencyTreeRenderer extends DefaultTreeCellRenderer {
33  
34      private static final long serialVersionUID = -4604073586040441112L;
35  
36      @Override
37      public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
38          DefaultTreeCellRenderer r = (DefaultTreeCellRenderer) super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);
39          Artifact artifact = (Artifact) value;
40          r.setForeground(Color.BLACK);
41          r.setBackground(Color.WHITE);
42          r.setOpaque(true);
43          if (selected) {
44              r.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
45          } else {
46              r.setBorder(null);
47          }
48          if (Artifact.SELECTED_NONE == artifact.getSelected()) {
49              r.setFont(r.getFont().deriveFont(Font.PLAIN));
50          } else {
51              r.setFont(r.getFont().deriveFont(Font.BOLD));
52              if (Artifact.SELECTED_PRINCIPLE == artifact.getSelected()) {
53                  r.setBackground(Color.YELLOW);
54              }
55          }
56          return r;
57      }
58  
59      /**
60       * Add this override to recalculate the width of this JLabel. The super class default behaviour miscalculates the
61       * width, and so the '...' can appear. Instead, we 'simulate' the FontMetrics' stringWidth() method, by using
62       * charWidth(), plus some initialization and padding
63       */
64      @Override
65      public Dimension getPreferredSize() {
66          Dimension dim = super.getPreferredSize();
67          FontMetrics fm = getFontMetrics(getFont());
68          char[] chars = getText().toCharArray();
69          /*
70           * Initialize the width value to take into account any icons and gaps. Don't try to get the Icon's width
71           * programatically from within this method, as an infinite loop will result. I've just assumed a width of 16
72           * here, but you could (should?) save the actual value in getTreeCellRendererComponent() and retrieve it here,
73           * if you wanted.
74           */
75          int w = getIconTextGap() + 16;
76          for (int i = 0; i < chars.length; i++) {
77              w += fm.charWidth(chars[i]);
78          }
79          w += getText().length();
80          dim.width = w;
81          return dim;
82      }
83  }